diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-09-15 12:18:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-15 12:18:15 +0200 |
| commit | dca2d6ac09d9ef59ff46820d4f0c94b08a671202 (patch) | |
| tree | fdec753b842dad09e3a4151954fab3eb5c43500d /arch/x86/kernel | |
| parent | d6a65dffb30d8636b1e5d4c201564ef401a246cf (diff) | |
| parent | 18240904960a39e582ced8ba8ececb10b8c22dd3 (diff) | |
Merge branch 'linus' into tracing/hw-breakpoints
Conflicts:
arch/x86/kernel/process_64.c
Semantic conflict fixed in:
arch/x86/kvm/x86.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel')
57 files changed, 2367 insertions, 1674 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 6b8ca3a0285..67e929b8987 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -833,106 +833,6 @@ static int __init acpi_parse_madt_lapic_entries(void) extern int es7000_plat; #endif -static struct { - int gsi_base; - int gsi_end; -} mp_ioapic_routing[MAX_IO_APICS]; - -int mp_find_ioapic(int gsi) -{ - int i = 0; - - /* Find the IOAPIC that manages this GSI. */ - for (i = 0; i < nr_ioapics; i++) { - if ((gsi >= mp_ioapic_routing[i].gsi_base) - && (gsi <= mp_ioapic_routing[i].gsi_end)) - return i; - } - - printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi); - return -1; -} - -int mp_find_ioapic_pin(int ioapic, int gsi) -{ - if (WARN_ON(ioapic == -1)) - return -1; - if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end)) - return -1; - - return gsi - mp_ioapic_routing[ioapic].gsi_base; -} - -static u8 __init uniq_ioapic_id(u8 id) -{ -#ifdef CONFIG_X86_32 - if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && - !APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) - return io_apic_get_unique_id(nr_ioapics, id); - else - return id; -#else - int i; - DECLARE_BITMAP(used, 256); - bitmap_zero(used, 256); - for (i = 0; i < nr_ioapics; i++) { - struct mpc_ioapic *ia = &mp_ioapics[i]; - __set_bit(ia->apicid, used); - } - if (!test_bit(id, used)) - return id; - return find_first_zero_bit(used, 256); -#endif -} - -static int bad_ioapic(unsigned long address) -{ - if (nr_ioapics >= MAX_IO_APICS) { - printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded " - "(found %d)\n", MAX_IO_APICS, nr_ioapics); - panic("Recompile kernel with bigger MAX_IO_APICS!\n"); - } - if (!address) { - printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address" - " found in table, skipping!\n"); - return 1; - } - return 0; -} - -void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) -{ - int idx = 0; - - if (bad_ioapic(address)) - return; - - idx = nr_ioapics; - - mp_ioapics[idx].type = MP_IOAPIC; - mp_ioapics[idx].flags = MPC_APIC_USABLE; - mp_ioapics[idx].apicaddr = address; - - set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); - mp_ioapics[idx].apicid = uniq_ioapic_id(id); - mp_ioapics[idx].apicver = io_apic_get_version(idx); - - /* - * Build basic GSI lookup table to facilitate gsi->io_apic lookups - * and to prevent reprogramming of IOAPIC pins (PCI GSIs). - */ - mp_ioapic_routing[idx].gsi_base = gsi_base; - mp_ioapic_routing[idx].gsi_end = gsi_base + - io_apic_get_redir_entries(idx); - - printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, " - "GSI %d-%d\n", idx, mp_ioapics[idx].apicid, - mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr, - mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end); - - nr_ioapics++; -} - int __init acpi_probe_gsi(void) { int idx; @@ -947,7 +847,7 @@ int __init acpi_probe_gsi(void) max_gsi = 0; for (idx = 0; idx < nr_ioapics; idx++) { - gsi = mp_ioapic_routing[idx].gsi_end; + gsi = mp_gsi_routing[idx].gsi_end; if (gsi > max_gsi) max_gsi = gsi; @@ -1179,9 +1079,8 @@ static int __init acpi_parse_madt_ioapic_entries(void) * If MPS is present, it will handle them, * otherwise the system will stay in PIC mode */ - if (acpi_disabled || acpi_noirq) { + if (acpi_disabled || acpi_noirq) return -ENODEV; - } if (!cpu_has_apic) return -ENODEV; diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index f5765870257..de7353c0ce9 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -2,6 +2,7 @@ #include <linux/sched.h> #include <linux/mutex.h> #include <linux/list.h> +#include <linux/stringify.h> #include <linux/kprobes.h> #include <linux/mm.h> #include <linux/vmalloc.h> @@ -32,7 +33,7 @@ __setup("smp-alt-boot", bootonly); #define smp_alt_once 1 #endif -static int debug_alternative; +static int __initdata_or_module debug_alternative; static int __init debug_alt(char *str) { @@ -51,7 +52,7 @@ static int __init setup_noreplace_smp(char *str) __setup("noreplace-smp", setup_noreplace_smp); #ifdef CONFIG_PARAVIRT -static int noreplace_paravirt = 0; +static int __initdata_or_module noreplace_paravirt = 0; static int __init setup_noreplace_paravirt(char *str) { @@ -64,16 +65,17 @@ __setup("noreplace-paravirt", setup_noreplace_paravirt); #define DPRINTK(fmt, args...) if (debug_alternative) \ printk(KERN_DEBUG fmt, args) -#ifdef GENERIC_NOP1 +#if defined(GENERIC_NOP1) && !defined(CONFIG_X86_64) /* Use inline assembly to define this because the nops are defined as inline assembly strings in the include files and we cannot get them easily into strings. */ -asm("\t.section .rodata, \"a\"\nintelnops: " +asm("\t" __stringify(__INITRODATA_OR_MODULE) "\nintelnops: " GENERIC_NOP1 GENERIC_NOP2 GENERIC_NOP3 GENERIC_NOP4 GENERIC_NOP5 GENERIC_NOP6 GENERIC_NOP7 GENERIC_NOP8 "\t.previous"); extern const unsigned char intelnops[]; -static const unsigned char *const intel_nops[ASM_NOP_MAX+1] = { +static const unsigned char *const __initconst_or_module +intel_nops[ASM_NOP_MAX+1] = { NULL, intelnops, intelnops + 1, @@ -87,12 +89,13 @@ static const unsigned char *const intel_nops[ASM_NOP_MAX+1] = { #endif #ifdef K8_NOP1 -asm("\t.section .rodata, \"a\"\nk8nops: " +asm("\t" __stringify(__INITRODATA_OR_MODULE) "\nk8nops: " K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6 K8_NOP7 K8_NOP8 "\t.previous"); extern const unsigned char k8nops[]; -static const unsigned char *const k8_nops[ASM_NOP_MAX+1] = { +static const unsigned char *const __initconst_or_module +k8_nops[ASM_NOP_MAX+1] = { NULL, k8nops, k8nops + 1, @@ -105,13 +108,14 @@ static const unsigned char *const k8_nops[ASM_NOP_MAX+1] = { }; #endif -#ifdef K7_NOP1 -asm("\t.section .rodata, \"a\"\nk7nops: " +#if defined(K7_NOP1) && !defined(CONFIG_X86_64) +asm("\t" __stringify(__INITRODATA_OR_MODULE) "\nk7nops: " K7_NOP1 K7_NOP2 K7_NOP3 K7_NOP4 K7_NOP5 K7_NOP6 K7_NOP7 K7_NOP8 "\t.previous"); extern const unsigned char k7nops[]; -static const unsigned char *const k7_nops[ASM_NOP_MAX+1] = { +static const unsigned char *const __initconst_or_module +k7_nops[ASM_NOP_MAX+1] = { NULL, k7nops, k7nops + 1, @@ -125,12 +129,13 @@ static const unsigned char *const k7_nops[ASM_NOP_MAX+1] = { #endif #ifdef P6_NOP1 -asm("\t.section .rodata, \"a\"\np6nops: " +asm("\t" __stringify(__INITRODATA_OR_MODULE) "\np6nops: " P6_NOP1 P6_NOP2 P6_NOP3 P6_NOP4 P6_NOP5 P6_NOP6 P6_NOP7 P6_NOP8 "\t.previous"); extern const unsigned char p6nops[]; -static const unsigned char *const p6_nops[ASM_NOP_MAX+1] = { +static const unsigned char *const __initconst_or_module +p6_nops[ASM_NOP_MAX+1] = { NULL, p6nops, p6nops + 1, @@ -146,7 +151,7 @@ static const unsigned char *const p6_nops[ASM_NOP_MAX+1] = { #ifdef CONFIG_X86_64 extern char __vsyscall_0; -const unsigned char *const *find_nop_table(void) +static const unsigned char *const *__init_or_module find_nop_table(void) { if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && boot_cpu_has(X86_FEATURE_NOPL)) @@ -157,7 +162,7 @@ const unsigned char *const *find_nop_table(void) #else /* CONFIG_X86_64 */ -const unsigned char *const *find_nop_table(void) +static const unsigned char *const *__init_or_module find_nop_table(void) { if (boot_cpu_has(X86_FEATURE_K8)) return k8_nops; @@ -172,7 +177,7 @@ const unsigned char *const *find_nop_table(void) #endif /* CONFIG_X86_64 */ /* Use this to add nops to a buffer, then text_poke the whole buffer. */ -void add_nops(void *insns, unsigned int len) +static void __init_or_module add_nops(void *insns, unsigned int len) { const unsigned char *const *noptable = find_nop_table(); @@ -185,10 +190,10 @@ void add_nops(void *insns, unsigned int len) len -= noplen; } } -EXPORT_SYMBOL_GPL(add_nops); extern struct alt_instr __alt_instructions[], __alt_instructions_end[]; extern u8 *__smp_locks[], *__smp_locks_end[]; +static void *text_poke_early(void *addr, const void *opcode, size_t len); /* Replace instructions with better alternatives for this CPU type. This runs before SMP is initialized to avoid SMP problems with @@ -196,7 +201,8 @@ extern u8 *__smp_locks[], *__smp_locks_end[]; APs have less capabilities than the boot processor are not handled. Tough. Make sure you disable such features by hand. */ -void apply_alternatives(struct alt_instr *start, struct alt_instr *end) +void __init_or_module apply_alternatives(struct alt_instr *start, + struct alt_instr *end) { struct alt_instr *a; char insnbuf[MAX_PATCH_LEN]; @@ -279,9 +285,10 @@ static LIST_HEAD(smp_alt_modules); static DEFINE_MUTEX(smp_alt); static int smp_mode = 1; /* protected by smp_alt */ -void alternatives_smp_module_add(struct module *mod, char *name, - void *locks, void *locks_end, - void *text, void *text_end) +void __init_or_module alternatives_smp_module_add(struct module *mod, + char *name, + void *locks, void *locks_end, + void *text, void *text_end) { struct smp_alt_module *smp; @@ -317,7 +324,7 @@ void alternatives_smp_module_add(struct module *mod, char *name, mutex_unlock(&smp_alt); } -void alternatives_smp_module_del(struct module *mod) +void __init_or_module alternatives_smp_module_del(struct module *mod) { struct smp_alt_module *item; @@ -386,8 +393,8 @@ void alternatives_smp_switch(int smp) #endif #ifdef CONFIG_PARAVIRT -void apply_paravirt(struct paravirt_patch_site *start, - struct paravirt_patch_site *end) +void __init_or_module apply_paravirt(struct paravirt_patch_site *start, + struct paravirt_patch_site *end) { struct paravirt_patch_site *p; char insnbuf[MAX_PATCH_LEN]; @@ -485,13 +492,14 @@ void __init alternative_instructions(void) * instructions. And on the local CPU you need to be protected again NMI or MCE * handlers seeing an inconsistent instruction while you patch. */ -void *text_poke_early(void *addr, const void *opcode, size_t len) +static void *__init_or_module text_poke_early(void *addr, const void *opcode, + size_t len) { unsigned long flags; local_irq_save(flags); memcpy(addr, opcode, len); - local_irq_restore(flags); sync_core(); + local_irq_restore(flags); /* Could also do a CLFLUSH here to speed up CPU recovery; but that causes hangs on some VIA CPUs. */ return addr; diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 6c99f503780..98f230f6a28 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -41,9 +41,13 @@ static DEFINE_RWLOCK(amd_iommu_devtable_lock); static LIST_HEAD(iommu_pd_list); static DEFINE_SPINLOCK(iommu_pd_list_lock); -#ifdef CONFIG_IOMMU_API +/* + * Domain for untranslated devices - only allocated + * if iommu=pt passed on kernel cmd line. + */ +static struct protection_domain *pt_domain; + static struct iommu_ops amd_iommu_ops; -#endif /* * general struct to manage commands send to an IOMMU @@ -55,16 +59,16 @@ struct iommu_cmd { static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, struct unity_map_entry *e); static struct dma_ops_domain *find_protection_domain(u16 devid); -static u64* alloc_pte(struct protection_domain *dom, - unsigned long address, u64 - **pte_page, gfp_t gfp); +static u64 *alloc_pte(struct protection_domain *domain, + unsigned long address, int end_lvl, + u64 **pte_page, gfp_t gfp); static void dma_ops_reserve_addresses(struct dma_ops_domain *dom, unsigned long start_page, unsigned int pages); - -#ifndef BUS_NOTIFY_UNBOUND_DRIVER -#define BUS_NOTIFY_UNBOUND_DRIVER 0x0005 -#endif +static void reset_iommu_command_buffer(struct amd_iommu *iommu); +static u64 *fetch_pte(struct protection_domain *domain, + unsigned long address, int map_size); +static void update_domain(struct protection_domain *domain); #ifdef CONFIG_AMD_IOMMU_STATS @@ -138,7 +142,25 @@ static int iommu_has_npcache(struct amd_iommu *iommu) * ****************************************************************************/ -static void iommu_print_event(void *__evt) +static void dump_dte_entry(u16 devid) +{ + int i; + + for (i = 0; i < 8; ++i) + pr_err("AMD-Vi: DTE[%d]: %08x\n", i, + amd_iommu_dev_table[devid].data[i]); +} + +static void dump_command(unsigned long phys_addr) +{ + struct iommu_cmd *cmd = phys_to_virt(phys_addr); + int i; + + for (i = 0; i < 4; ++i) + pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]); +} + +static void iommu_print_event(struct amd_iommu *iommu, void *__evt) { u32 *event = __evt; int type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK; @@ -147,7 +169,7 @@ static void iommu_print_event(void *__evt) int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK; u64 address = (u64)(((u64)event[3]) << 32) | event[2]; - printk(KERN_ERR "AMD IOMMU: Event logged ["); + printk(KERN_ERR "AMD-Vi: Event logged ["); switch (type) { case EVENT_TYPE_ILL_DEV: @@ -155,6 +177,7 @@ static void iommu_print_event(void *__evt) "address=0x%016llx flags=0x%04x]\n", PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), address, flags); + dump_dte_entry(devid); break; case EVENT_TYPE_IO_FAULT: printk("IO_PAGE_FAULT device=%02x:%02x.%x " @@ -176,6 +199,8 @@ static void iommu_print_event(void *__evt) break; case EVENT_TYPE_ILL_CMD: printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address); + reset_iommu_command_buffer(iommu); + dump_command(address); break; case EVENT_TYPE_CMD_HARD_ERR: printk("COMMAND_HARDWARE_ERROR address=0x%016llx " @@ -209,7 +234,7 @@ static void iommu_poll_events(struct amd_iommu *iommu) tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET); while (head != tail) { - iommu_print_event(iommu->evt_buf + head); + iommu_print_event(iommu, iommu->evt_buf + head); head = (head + EVENT_ENTRY_SIZE) % iommu->evt_buf_size; } @@ -296,8 +321,11 @@ static void __iommu_wait_for_completion(struct amd_iommu *iommu) status &= ~MMIO_STATUS_COM_WAIT_INT_MASK; writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET); - if (unlikely(i == EXIT_LOOP_COUNT)) - panic("AMD IOMMU: Completion wait loop failed\n"); + if (unlikely(i == EXIT_LOOP_COUNT)) { + spin_unlock(&iommu->lock); + reset_iommu_command_buffer(iommu); + spin_lock(&iommu->lock); + } } /* @@ -445,47 +473,78 @@ static void iommu_flush_tlb_pde(struct amd_iommu *iommu, u16 domid) } /* + * This function flushes one domain on one IOMMU + */ +static void flush_domain_on_iommu(struct amd_iommu *iommu, u16 domid) +{ + struct iommu_cmd cmd; + unsigned long flags; + + __iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, + domid, 1, 1); + + spin_lock_irqsave(&iommu->lock, flags); + __iommu_queue_command(iommu, &cmd); + __iommu_completion_wait(iommu); + __iommu_wait_for_completion(iommu); + spin_unlock_irqrestore(&iommu->lock, flags); +} + +static void flush_all_domains_on_iommu(struct amd_iommu *iommu) +{ + int i; + + for (i = 1; i < MAX_DOMAIN_ID; ++i) { + if (!test_bit(i, amd_iommu_pd_alloc_bitmap)) + continue; + flush_domain_on_iommu(iommu, i); + } + +} + +/* * This function is used to flush the IO/TLB for a given protection domain * on every IOMMU in the system */ static void iommu_flush_domain(u16 domid) { - unsigned long flags; struct amd_iommu *iommu; - struct iommu_cmd cmd; INC_STATS_COUNTER(domain_flush_all); - __iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS, - domid, 1, 1); - - for_each_iommu(iommu) { - spin_lock_irqsave(&iommu->lock, flags); - __iommu_queue_command(iommu, &cmd); - __iommu_completion_wait(iommu); - __iommu_wait_for_completion(iommu); - spin_unlock_irqrestore(&iommu->lock, flags); - } + for_each_iommu(iommu) + flush_domain_on_iommu(iommu, domid); } void amd_iommu_flush_all_domains(void) { + struct amd_iommu *iommu; + + for_each_iommu(iommu) + flush_all_domains_on_iommu(iommu); +} + +static void flush_all_devices_for_iommu(struct amd_iommu *iommu) +{ int i; - for (i = 1; i < MAX_DOMAIN_ID; ++i) { - if (!test_bit(i, amd_iommu_pd_alloc_bitmap)) + for (i = 0; i <= amd_iommu_last_bdf; ++i) { + if (iommu != amd_iommu_rlookup_table[i]) continue; - iommu_flush_domain(i); + + iommu_queue_inv_dev_entry(iommu, i); + iommu_completion_wait(iommu); } } -void amd_iommu_flush_all_devices(void) +static void flush_devices_by_domain(struct protection_domain *domain) { struct amd_iommu *iommu; int i; for (i = 0; i <= amd_iommu_last_bdf; ++i) { - if (amd_iommu_pd_table[i] == NULL) + if ((domain == NULL && amd_iommu_pd_table[i] == NULL) || + (amd_iommu_pd_table[i] != domain)) continue; iommu = amd_iommu_rlookup_table[i]; @@ -497,6 +556,27 @@ void amd_iommu_flush_all_devices(void) } } +static void reset_iommu_command_buffer(struct amd_iommu *iommu) +{ + pr_err("AMD-Vi: Resetting IOMMU command buffer\n"); + + if (iommu->reset_in_progress) + panic("AMD-Vi: ILLEGAL_COMMAND_ERROR while resetting command buffer\n"); + + iommu->reset_in_progress = true; + + amd_iommu_reset_cmd_buffer(iommu); + flush_all_devices_for_iommu(iommu); + flush_all_domains_on_iommu(iommu); + + iommu->reset_in_progress = false; +} + +void amd_iommu_flush_all_devices(void) +{ + flush_devices_by_domain(NULL); +} + /**************************************************************************** * * The functions below are used the create the page table mappings for @@ -514,18 +594,21 @@ void amd_iommu_flush_all_devices(void) static int iommu_map_page(struct protection_domain *dom, unsigned long bus_addr, unsigned long phys_addr, - int prot) + int prot, + int map_size) { u64 __pte, *pte; bus_addr = PAGE_ALIGN(bus_addr); phys_addr = PAGE_ALIGN(phys_addr); - /* only support 512GB address spaces for now */ - if (bus_addr > IOMMU_MAP_SIZE_L3 || !(prot & IOMMU_PROT_MASK)) + BUG_ON(!PM_ALIGNED(map_size, bus_addr)); + BUG_ON(!PM_ALIGNED(map_size, phys_addr)); + + if (!(prot & IOMMU_PROT_MASK)) return -EINVAL; - pte = alloc_pte(dom, bus_addr, NULL, GFP_KERNEL); + pte = alloc_pte(dom, bus_addr, map_size, NULL, GFP_KERNEL); if (IOMMU_PTE_PRESENT(*pte)) return -EBUSY; @@ -538,29 +621,18 @@ static int iommu_map_page(struct protection_domain *dom, *pte = __pte; + update_domain(dom); + return 0; } static void iommu_unmap_page(struct protection_domain *dom, - unsigned long bus_addr) + unsigned long bus_addr, int map_size) { - u64 *pte; - - pte = &dom->pt_root[IOMMU_PTE_L2_INDEX(bus_addr)]; - - if (!IOMMU_PTE_PRESENT(*pte)) - return; - - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L1_INDEX(bus_addr)]; + u64 *pte = fetch_pte(dom, bus_addr, map_size); - if (!IOMMU_PTE_PRESENT(*pte)) - return; - - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L1_INDEX(bus_addr)]; - - *pte = 0; + if (pte) + *pte = 0; } /* @@ -615,7 +687,8 @@ static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, for (addr = e->address_start; addr < e->address_end; addr += PAGE_SIZE) { - ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot); + ret = iommu_map_page(&dma_dom->domain, addr, addr, e->prot, + PM_MAP_4k); if (ret) return ret; /* @@ -670,24 +743,29 @@ static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom, * This function checks if there is a PTE for a given dma address. If * there is one, it returns the pointer to it. */ -static u64* fetch_pte(struct protection_domain *domain, - unsigned long address) +static u64 *fetch_pte(struct protection_domain *domain, + unsigned long address, int map_size) { + int level; u64 *pte; - pte = &domain->pt_root[IOMMU_PTE_L2_INDEX(address)]; + level = domain->mode - 1; + pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; - if (!IOMMU_PTE_PRESENT(*pte)) - return NULL; + while (level > map_size) { + if (!IOMMU_PTE_PRESENT(*pte)) + return NULL; - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L1_INDEX(address)]; + level -= 1; - if (!IOMMU_PTE_PRESENT(*pte)) - return NULL; + pte = IOMMU_PTE_PAGE(*pte); + pte = &pte[PM_LEVEL_INDEX(level, address)]; - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L0_INDEX(address)]; + if ((PM_PTE_LEVEL(*pte) == 0) && level != map_size) { + pte = NULL; + break; + } + } return pte; } @@ -727,7 +805,7 @@ static int alloc_new_range(struct amd_iommu *iommu, u64 *pte, *pte_page; for (i = 0; i < num_ptes; ++i) { - pte = alloc_pte(&dma_dom->domain, address, + pte = alloc_pte(&dma_dom->domain, address, PM_MAP_4k, &pte_page, gfp); if (!pte) goto out_free; @@ -760,16 +838,20 @@ static int alloc_new_range(struct amd_iommu *iommu, for (i = dma_dom->aperture[index]->offset; i < dma_dom->aperture_size; i += PAGE_SIZE) { - u64 *pte = fetch_pte(&dma_dom->domain, i); + u64 *pte = fetch_pte(&dma_dom->domain, i, PM_MAP_4k); if (!pte || !IOMMU_PTE_PRESENT(*pte)) continue; dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1); } + update_domain(&dma_dom->domain); + return 0; out_free: + update_domain(&dma_dom->domain); + free_page((unsigned long)dma_dom->aperture[index]->bitmap); kfree(dma_dom->aperture[index]); @@ -1009,7 +1091,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu) dma_dom->domain.id = domain_id_alloc(); if (dma_dom->domain.id == 0) goto free_dma_dom; - dma_dom->domain.mode = PAGE_MODE_3_LEVEL; + dma_dom->domain.mode = PAGE_MODE_2_LEVEL; dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL); dma_dom->domain.flags = PD_DMA_OPS_MASK; dma_dom->domain.priv = dma_dom; @@ -1063,6 +1145,41 @@ static struct protection_domain *domain_for_device(u16 devid) return dom; } +static void set_dte_entry(u16 devid, struct protection_domain *domain) +{ + u64 pte_root = virt_to_phys(domain->pt_root); + + pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) + << DEV_ENTRY_MODE_SHIFT; + pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | IOMMU_PTE_TV; + + amd_iommu_dev_table[devid].data[2] = domain->id; + amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root); + amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root); + + amd_iommu_pd_table[devid] = domain; +} + +/* + * If a device is not yet associated with a domain, this function does + * assigns it visible for the hardware + */ +static void __attach_device(struct amd_iommu *iommu, + struct protection_domain *domain, + u16 devid) +{ + /* lock domain */ + spin_lock(&domain->lock); + + /* update DTE entry */ + set_dte_entry(devid, domain); + + domain->dev_cnt += 1; + + /* ready */ + spin_unlock(&domain->lock); +} + /* * If a device is not yet associated with a domain, this function does * assigns it visible for the hardware @@ -1072,27 +1189,16 @@ static void attach_device(struct amd_iommu *iommu, u16 devid) { unsigned long flags; - u64 pte_root = virt_to_phys(domain->pt_root); - - domain->dev_cnt += 1; - - pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) - << DEV_ENTRY_MODE_SHIFT; - pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | IOMMU_PTE_TV; write_lock_irqsave(&amd_iommu_devtable_lock, flags); - amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root); - amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root); - amd_iommu_dev_table[devid].data[2] = domain->id; - - amd_iommu_pd_table[devid] = domain; + __attach_device(iommu, domain, devid); write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); - /* - * We might boot into a crash-kernel here. The crashed kernel - * left the caches in the IOMMU dirty. So we have to flush - * here to evict all dirty stuff. - */ + /* + * We might boot into a crash-kernel here. The crashed kernel + * left the caches in the IOMMU dirty. So we have to flush + * here to evict all dirty stuff. + */ iommu_queue_inv_dev_entry(iommu, devid); iommu_flush_tlb_pde(iommu, domain->id); } @@ -1119,6 +1225,15 @@ static void __detach_device(struct protection_domain *domain, u16 devid) /* ready */ spin_unlock(&domain->lock); + + /* + * If we run in passthrough mode the device must be assigned to the + * passthrough domain if it is detached from any other domain + */ + if (iommu_pass_through) { + struct amd_iommu *iommu = amd_iommu_rlookup_table[devid]; + __attach_device(iommu, pt_domain, devid); + } } /* @@ -1164,6 +1279,8 @@ static int device_change_notifier(struct notifier_block *nb, case BUS_NOTIFY_UNBOUND_DRIVER: if (!domain) goto out; + if (iommu_pass_through) + break; detach_device(domain, devid); break; case BUS_NOTIFY_ADD_DEVICE: @@ -1292,39 +1409,91 @@ static int get_device_resources(struct device *dev, return 1; } +static void update_device_table(struct protection_domain *domain) +{ + unsigned long flags; + int i; + + for (i = 0; i <= amd_iommu_last_bdf; ++i) { + if (amd_iommu_pd_table[i] != domain) + continue; + write_lock_irqsave(&amd_iommu_devtable_lock, flags); + set_dte_entry(i, domain); + write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); + } +} + +static void update_domain(struct protection_domain *domain) +{ + if (!domain->updated) + return; + + update_device_table(domain); + flush_devices_by_domain(domain); + iommu_flush_domain(domain->id); + + domain->updated = false; +} + /* - * If the pte_page is not yet allocated this function is called + * This function is used to add another level to an IO page table. Adding + * another level increases the size of the address space by 9 bits to a size up + * to 64 bits. */ -static u64* alloc_pte(struct protection_domain *dom, - unsigned long address, u64 **pte_page, gfp_t gfp) +static bool increase_address_space(struct protection_domain *domain, + gfp_t gfp) +{ + u64 *pte; + + if (domain->mode == PAGE_MODE_6_LEVEL) + /* address space already 64 bit large */ + return false; + + pte = (void *)get_zeroed_page(gfp); + if (!pte) + return false; + + *pte = PM_LEVEL_PDE(domain->mode, + virt_to_phys(domain->pt_root)); + domain->pt_root = pte; + domain->mode += 1; + domain->updated = true; + + return true; +} + +static u64 *alloc_pte(struct protection_domain *domain, + unsigned long address, + int end_lvl, + u64 **pte_page, + gfp_t gfp) { u64 *pte, *page; + int level; - pte = &dom->pt_root[IOMMU_PTE_L2_INDEX(address)]; + while (address > PM_LEVEL_SIZE(domain->mode)) + increase_address_space(domain, gfp); - if (!IOMMU_PTE_PRESENT(*pte)) { - page = (u64 *)get_zeroed_page(gfp); - if (!page) - return NULL; - *pte = IOMMU_L2_PDE(virt_to_phys(page)); - } + level = domain->mode - 1; + pte = &domain->pt_root[PM_LEVEL_INDEX(level, address)]; - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L1_INDEX(address)]; + while (level > end_lvl) { + if (!IOMMU_PTE_PRESENT(*pte)) { + page = (u64 *)get_zeroed_page(gfp); + if (!page) + return NULL; + *pte = PM_LEVEL_PDE(level, virt_to_phys(page)); + } - if (!IOMMU_PTE_PRESENT(*pte)) { - page = (u64 *)get_zeroed_page(gfp); - if (!page) - return NULL; - *pte = IOMMU_L1_PDE(virt_to_phys(page)); - } + level -= 1; - pte = IOMMU_PTE_PAGE(*pte); + pte = IOMMU_PTE_PAGE(*pte); - if (pte_page) - *pte_page = pte; + if (pte_page && level == end_lvl) + *pte_page = pte; - pte = &pte[IOMMU_PTE_L0_INDEX(address)]; + pte = &pte[PM_LEVEL_INDEX(level, address)]; + } return pte; } @@ -1344,10 +1513,13 @@ static u64* dma_ops_get_pte(struct dma_ops_domain *dom, pte = aperture->pte_pages[APERTURE_PAGE_INDEX(address)]; if (!pte) { - pte = alloc_pte(&dom->domain, address, &pte_page, GFP_ATOMIC); + pte = alloc_pte(&dom->domain, address, PM_MAP_4k, &pte_page, + GFP_ATOMIC); aperture->pte_pages[APERTURE_PAGE_INDEX(address)] = pte_page; } else - pte += IOMMU_PTE_L0_INDEX(address); + pte += PM_LEVEL_INDEX(0, address); + + update_domain(&dom->domain); return pte; } @@ -1409,7 +1581,7 @@ static void dma_ops_domain_unmap(struct amd_iommu *iommu, if (!pte) return; - pte += IOMMU_PTE_L0_INDEX(address); + pte += PM_LEVEL_INDEX(0, address); WARN_ON(!*pte); @@ -1988,19 +2160,47 @@ static void cleanup_domain(struct protection_domain *domain) write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); } -static int amd_iommu_domain_init(struct iommu_domain *dom) +static void protection_domain_free(struct protection_domain *domain) +{ + if (!domain) + return; + + if (domain->id) + domain_id_free(domain->id); + + kfree(domain); +} + +static struct protection_domain *protection_domain_alloc(void) { struct protection_domain *domain; domain = kzalloc(sizeof(*domain), GFP_KERNEL); if (!domain) - return -ENOMEM; + return NULL; spin_lock_init(&domain->lock); - domain->mode = PAGE_MODE_3_LEVEL; domain->id = domain_id_alloc(); if (!domain->id) + goto out_err; + + return domain; + +out_err: + kfree(domain); + + return NULL; +} + +static int amd_iommu_domain_init(struct iommu_domain *dom) +{ + struct protection_domain *domain; + + domain = protection_domain_alloc(); + if (!domain) goto out_free; + + domain->mode = PAGE_MODE_3_LEVEL; domain->pt_root = (void *)get_zeroed_page(GFP_KERNEL); if (!domain->pt_root) goto out_free; @@ -2010,7 +2210,7 @@ static int amd_iommu_domain_init(struct iommu_domain *dom) return 0; out_free: - kfree(domain); + protection_domain_free(domain); return -ENOMEM; } @@ -2115,7 +2315,7 @@ static int amd_iommu_map_range(struct iommu_domain *dom, paddr &= PAGE_MASK; for (i = 0; i < npages; ++i) { - ret = iommu_map_page(domain, iova, paddr, prot); + ret = iommu_map_page(domain, iova, paddr, prot, PM_MAP_4k); if (ret) return ret; @@ -2136,7 +2336,7 @@ static void amd_iommu_unmap_range(struct iommu_domain *dom, iova &= PAGE_MASK; for (i = 0; i < npages; ++i) { - iommu_unmap_page(domain, iova); + iommu_unmap_page(domain, iova, PM_MAP_4k); iova += PAGE_SIZE; } @@ -2151,21 +2351,9 @@ static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, phys_addr_t paddr; u64 *pte; - pte = &domain->pt_root[IOMMU_PTE_L2_INDEX(iova)]; - - if (!IOMMU_PTE_PRESENT(*pte)) - return 0; - - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L1_INDEX(iova)]; - - if (!IOMMU_PTE_PRESENT(*pte)) - return 0; - - pte = IOMMU_PTE_PAGE(*pte); - pte = &pte[IOMMU_PTE_L0_INDEX(iova)]; + pte = fetch_pte(domain, iova, PM_MAP_4k); - if (!IOMMU_PTE_PRESENT(*pte)) + if (!pte || !IOMMU_PTE_PRESENT(*pte)) return 0; paddr = *pte & IOMMU_PAGE_MASK; @@ -2191,3 +2379,46 @@ static struct iommu_ops amd_iommu_ops = { .domain_has_cap = amd_iommu_domain_has_cap, }; +/***************************************************************************** + * + * The next functions do a basic initialization of IOMMU for pass through + * mode + * + * In passthrough mode the IOMMU is initialized and enabled but not used for + * DMA-API translation. + * + *****************************************************************************/ + +int __init amd_iommu_init_passthrough(void) +{ + struct pci_dev *dev = NULL; + u16 devid, devid2; + + /* allocate passthroug domain */ + pt_domain = protection_domain_alloc(); + if (!pt_domain) + return -ENOMEM; + + pt_domain->mode |= PAGE_MODE_NONE; + + while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { + struct amd_iommu *iommu; + + devid = calc_devid(dev->bus->number, dev->devfn); + if (devid > amd_iommu_last_bdf) + continue; + + devid2 = amd_iommu_alias_table[devid]; + + iommu = amd_iommu_rlookup_table[devid2]; + if (!iommu) + continue; + + __attach_device(iommu, pt_domain, devid); + __attach_device(iommu, pt_domain, devid2); + } + + pr_info("AMD-Vi: Initialized for Passthrough Mode\n"); + + return 0; +} diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index c1b17e97252..b4b61d462dc 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -252,7 +252,7 @@ static void __init iommu_feature_disable(struct amd_iommu *iommu, u8 bit) /* Function to enable the hardware */ static void iommu_enable(struct amd_iommu *iommu) { - printk(KERN_INFO "AMD IOMMU: Enabling IOMMU at %s cap 0x%hx\n", + printk(KERN_INFO "AMD-Vi: Enabling IOMMU at %s cap 0x%hx\n", dev_name(&iommu->dev->dev), iommu->cap_ptr); iommu_feature_enable(iommu, CONTROL_IOMMU_EN); @@ -435,6 +435,20 @@ static u8 * __init alloc_command_buffer(struct amd_iommu *iommu) } /* + * This function resets the command buffer if the IOMMU stopped fetching + * commands from it. + */ +void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu) +{ + iommu_feature_disable(iommu, CONTROL_CMDBUF_EN); + + writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); + writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); + + iommu_feature_enable(iommu, CONTROL_CMDBUF_EN); +} + +/* * This function writes the command buffer address to the hardware and * enables it. */ @@ -450,11 +464,7 @@ static void iommu_enable_command_buffer(struct amd_iommu *iommu) memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET, &entry, sizeof(entry)); - /* set head and tail to zero manually */ - writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET); - writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET); - - iommu_feature_enable(iommu, CONTROL_CMDBUF_EN); + amd_iommu_reset_cmd_buffer(iommu); } static void __init free_command_buffer(struct amd_iommu *iommu) @@ -858,7 +868,7 @@ static int __init init_iommu_all(struct acpi_table_header *table) switch (*p) { case ACPI_IVHD_TYPE: - DUMP_printk("IOMMU: device: %02x:%02x.%01x cap: %04x " + DUMP_printk("device: %02x:%02x.%01x cap: %04x " "seg: %d flags: %01x info %04x\n", PCI_BUS(h->devid), PCI_SLOT(h->devid), PCI_FUNC(h->devid), h->cap_ptr, @@ -902,7 +912,7 @@ static int __init iommu_setup_msi(struct amd_iommu *iommu) r = request_irq(iommu->dev->irq, amd_iommu_int_handler, IRQF_SAMPLE_RANDOM, - "AMD IOMMU", + "AMD-Vi", NULL); if (r) { @@ -1150,7 +1160,7 @@ int __init amd_iommu_init(void) if (no_iommu) { - printk(KERN_INFO "AMD IOMMU disabled by kernel command line\n"); + printk(KERN_INFO "AMD-Vi disabled by kernel command line\n"); return 0; } @@ -1242,22 +1252,28 @@ int __init amd_iommu_init(void) if (ret) goto free; - ret = amd_iommu_init_dma_ops(); + if (iommu_pass_through) + ret = amd_iommu_init_passthrough(); + else + ret = amd_iommu_init_dma_ops(); if (ret) goto free; enable_iommus(); - printk(KERN_INFO "AMD IOMMU: device isolation "); + if (iommu_pass_through) + goto out; + + printk(KERN_INFO "AMD-Vi: device isolation "); if (amd_iommu_isolate) printk("enabled\n"); else printk("disabled\n"); if (amd_iommu_unmap_flush) - printk(KERN_INFO "AMD IOMMU: IO/TLB flush on unmap enabled\n"); + printk(KERN_INFO "AMD-Vi: IO/TLB flush on unmap enabled\n"); else - printk(KERN_INFO "AMD IOMMU: Lazy IO/TLB flushing enabled\n"); + printk(KERN_INFO "AMD-Vi: Lazy IO/TLB flushing enabled\n"); out: return ret; diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c index 676debfc170..128111d8ffe 100644 --- a/arch/x86/kernel/aperture_64.c +++ b/arch/x86/kernel/aperture_64.c @@ -20,6 +20,7 @@ #include <linux/bitops.h> #include <linux/ioport.h> #include <linux/suspend.h> +#include <linux/kmemleak.h> #include <asm/e820.h> #include <asm/io.h> #include <asm/iommu.h> @@ -94,6 +95,11 @@ static u32 __init allocate_aperture(void) * code for safe */ p = __alloc_bootmem_nopanic(aper_size, aper_size, 512ULL<<20); + /* + * Kmemleak should not scan this block as it may not be mapped via the + * kernel direct mapping. + */ + kmemleak_ignore(p); if (!p || __pa(p)+aper_size > 0xffffffff) { printk(KERN_ERR "Cannot allocate aperture memory hole (%p,%uK)\n", diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 0a1c2830ec6..159740decc4 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -49,6 +49,7 @@ #include <asm/mtrr.h> #include <asm/smp.h> #include <asm/mce.h> +#include <asm/kvm_para.h> unsigned int num_processors; @@ -1361,52 +1362,80 @@ void enable_x2apic(void) } #endif /* CONFIG_X86_X2APIC */ -void __init enable_IR_x2apic(void) +int __init enable_IR(void) { #ifdef CONFIG_INTR_REMAP - int ret; - unsigned long flags; - struct IO_APIC_route_entry **ioapic_entries = NULL; - - ret = dmar_table_init(); - if (ret) { - pr_debug("dmar_table_init() failed with %d:\n", ret); - goto ir_failed; - } - if (!intr_remapping_supported()) { pr_debug("intr-remapping not supported\n"); - goto ir_failed; + return 0; } - if (!x2apic_preenabled && skip_ioapic_setup) { pr_info("Skipped enabling intr-remap because of skipping " "io-apic setup\n"); - return; + return 0; } + if (enable_intr_remapping(x2apic_supported())) + return 0; + + pr_info("Enabled Interrupt-remapping\n"); + + return 1; + +#endif + return 0; +} + +void __init enable_IR_x2apic(void) +{ + unsigned long flags; + struct IO_APIC_route_entry **ioapic_entries = NULL; + int ret, x2apic_enabled = 0; + int dmar_table_init_ret = 0; + +#ifdef CONFIG_INTR_REMAP + dmar_table_init_ret = dmar_table_init(); + if (dmar_table_init_ret) + pr_debug("dmar_table_init() failed with %d:\n", + dmar_table_init_ret); +#endif + ioapic_entries = alloc_ioapic_entries(); if (!ioapic_entries) { - pr_info("Allocate ioapic_entries failed: %d\n", ret); - goto end; + pr_err("Allocate ioapic_entries failed\n"); + goto out; } ret = save_IO_APIC_setup(ioapic_entries); if (ret) { pr_info("Saving IO-APIC state failed: %d\n", ret); - goto end; + goto out; } local_irq_save(flags); - mask_IO_APIC_setup(ioapic_entries); mask_8259A(); + mask_IO_APIC_setup(ioapic_entries); - ret = enable_intr_remapping(x2apic_supported()); - if (ret) - goto end_restore; + if (dmar_table_init_ret) + ret = 0; + else + ret = enable_IR(); - pr_info("Enabled Interrupt-remapping\n"); + if (!ret) { + /* IR is required if there is APIC ID > 255 even when running + * under KVM + */ + if (max_physical_apicid > 255 || !kvm_para_available()) + goto nox2apic; + /* + * without IR all CPUs can be addressed by IOAPIC/MSI + * only in physical mode + */ + x2apic_force_phys(); + } + + x2apic_enabled = 1; if (x2apic_supported() && !x2apic_mode) { x2apic_mode = 1; @@ -1414,41 +1443,25 @@ void __init enable_IR_x2apic(void) pr_info("Enabled x2apic\n"); } -end_restore: - if (ret) - /* - * IR enabling failed - */ +nox2apic: + if (!ret) /* IR enabling failed */ restore_IO_APIC_setup(ioapic_entries); - unmask_8259A(); local_irq_restore(flags); -end: +out: if (ioapic_entries) free_ioapic_entries(ioapic_entries); - if (!ret) + if (x2apic_enabled) return; -ir_failed: if (x2apic_preenabled) - panic("x2apic enabled by bios. But IR enabling failed"); + panic("x2apic: enabled by BIOS but kernel init failed."); else if (cpu_has_x2apic) - pr_info("Not enabling x2apic,Intr-remapping\n"); -#else - if (!cpu_has_x2apic) - return; - - if (x2apic_preenabled) - panic("x2apic enabled prior OS handover," - " enable CONFIG_X86_X2APIC, CONFIG_INTR_REMAP"); -#endif - - return; + pr_info("Not enabling x2apic, Intr-remapping init failed.\n"); } - #ifdef CONFIG_X86_64 /* * Detect and enable local APICs on non-SMP boards. @@ -1549,8 +1562,6 @@ no_apic: #ifdef CONFIG_X86_64 void __init early_init_lapic_mapping(void) { - unsigned long phys_addr; - /* * If no local APIC can be found then go out * : it means there is no mpatable and MADT @@ -1558,11 +1569,9 @@ void __init early_init_lapic_mapping(void) if (!smp_found_config) return; - phys_addr = mp_lapic_addr; - - set_fixmap_nocache(FIX_APIC_BASE, phys_addr); + set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr); apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n", - APIC_BASE, phys_addr); + APIC_BASE, mp_lapic_addr); /* * Fetch the APIC ID of the BSP in case we have a @@ -1651,7 +1660,6 @@ int __init APIC_init_uniprocessor(void) APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) { pr_err("BIOS bug, local APIC 0x%x not detected!...\n", boot_cpu_physical_apicid); - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC); return -1; } #endif diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c index 8952a589028..89174f847b4 100644 --- a/arch/x86/kernel/apic/es7000_32.c +++ b/arch/x86/kernel/apic/es7000_32.c @@ -167,7 +167,7 @@ static int es7000_apic_is_cluster(void) { /* MPENTIUMIII */ if (boot_cpu_data.x86 == 6 && - (boot_cpu_data.x86_model >= 7 || boot_cpu_data.x86_model <= 11)) + (boot_cpu_data.x86_model >= 7 && boot_cpu_data.x86_model <= 11)) return 1; return 0; diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index d2ed6c5ddc8..3c8f9e75d03 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -66,6 +66,8 @@ #include <asm/apic.h> #define __apicdebuginit(type) static type __init +#define for_each_irq_pin(entry, head) \ + for (entry = head; entry; entry = entry->next) /* * Is the SiS APIC rmw bug present ? @@ -85,6 +87,9 @@ int nr_ioapic_registers[MAX_IO_APICS]; struct mpc_ioapic mp_ioapics[MAX_IO_APICS]; int nr_ioapics; +/* IO APIC gsi routing info */ +struct mp_ioapic_gsi mp_gsi_routing[MAX_IO_APICS]; + /* MP IRQ source entries */ struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES]; @@ -116,15 +121,6 @@ static int __init parse_noapic(char *str) } early_param("noapic", parse_noapic); -struct irq_pin_list; - -/* - * This is performance-critical, we want to do it O(1) - * - * the indexing order of this array favors 1:1 mappings - * between pins and IRQs. - */ - struct irq_pin_list { int apic, pin; struct irq_pin_list *next; @@ -139,6 +135,11 @@ static struct irq_pin_list *get_one_free_irq_2_pin(int node) return pin; } +/* + * This is performance-critical, we want to do it O(1) + * + * Most irqs are mapped 1:1 with pins. + */ struct irq_cfg { struct irq_pin_list *irq_2_pin; cpumask_var_t domain; @@ -414,13 +415,10 @@ static bool io_apic_level_ack_pending(struct irq_cfg *cfg) unsigned long flags; spin_lock_irqsave(&ioapic_lock, flags); - entry = cfg->irq_2_pin; - for (;;) { + for_each_irq_pin(entry, cfg->irq_2_pin) { unsigned int reg; int pin; - if (!entry) - break; pin = entry->pin; reg = io_apic_read(entry->apic, 0x10 + pin*2); /* Is the remote IRR bit set? */ @@ -428,9 +426,6 @@ static bool io_apic_level_ack_pending(struct irq_cfg *cfg) spin_unlock_irqrestore(&ioapic_lock, flags); return true; } - if (!entry->next) - break; - entry = entry->next; } spin_unlock_irqrestore(&ioapic_lock, flags); @@ -498,72 +493,68 @@ static void ioapic_mask_entry(int apic, int pin) * shared ISA-space IRQs, so we have to support them. We are super * fast in the common case, and fast for shared ISA-space IRQs. */ -static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin) +static int +add_pin_to_irq_node_nopanic(struct irq_cfg *cfg, int node, int apic, int pin) { - struct irq_pin_list *entry; + struct irq_pin_list **last, *entry; - entry = cfg->irq_2_pin; - if (!entry) { - entry = get_one_free_irq_2_pin(node); - if (!entry) { - printk(KERN_ERR "can not alloc irq_2_pin to add %d - %d\n", - apic, pin); - return; - } - cfg->irq_2_pin = entry; - entry->apic = apic; - entry->pin = pin; - return; - } - - while (entry->next) { - /* not again, please */ + /* don't allow duplicates */ + last = &cfg->irq_2_pin; + for_each_irq_pin(entry, cfg->irq_2_pin) { if (entry->apic == apic && entry->pin == pin) - return; - - entry = entry->next; + return 0; + last = &entry->next; } - entry->next = get_one_free_irq_2_pin(node); - entry = entry->next; + entry = get_one_free_irq_2_pin(node); + if (!entry) { + printk(KERN_ERR "can not alloc irq_pin_list (%d,%d,%d)\n", + node, apic, pin); + return -ENOMEM; + } entry->apic = apic; entry->pin = pin; + + *last = entry; + return 0; +} + +static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin) +{ + if (add_pin_to_irq_node_nopanic(cfg, node, apic, pin)) + panic("IO-APIC: failed to add irq-pin. Can not proceed\n"); } /* * Reroute an IRQ to a different pin. */ static void __init replace_pin_at_irq_node(struct irq_cfg *cfg, int node, - int oldapic, int oldpin, - int newapic, int newpin) + int oldapic, int oldpin, + int newapic, int newpin) { - struct irq_pin_list *entry = cfg->irq_2_pin; - int replaced = 0; + struct irq_pin_list *entry; - while (entry) { + for_each_irq_pin(entry, cfg->irq_2_pin) { if (entry->apic == oldapic && entry->pin == oldpin) { entry->apic = newapic; entry->pin = newpin; - replaced = 1; /* every one is different, right? */ - break; + return; } - entry = entry->next; } - /* why? call replace before add? */ - if (!replaced) - add_pin_to_irq_node(cfg, node, newapic, newpin); + /* old apic/pin didn't exist, so just add new ones */ + add_pin_to_irq_node(cfg, node, newapic, newpin); } -static inline void io_apic_modify_irq(struct irq_cfg *cfg, - int mask_and, int mask_or, - void (*final)(struct irq_pin_list *entry)) +static void io_apic_modify_irq(struct irq_cfg *cfg, + int mask_and, int mask_or, + void (*final)(struct irq_pin_list *entry)) { int pin; struct irq_pin_list *entry; - for (entry = cfg->irq_2_pin; entry != NULL; entry = entry->next) { + for_each_irq_pin(entry, cfg->irq_2_pin) { unsigned int reg; pin = entry->pin; reg = io_apic_read(entry->apic, 0x10 + pin * 2); @@ -580,7 +571,6 @@ static void __unmask_IO_APIC_irq(struct irq_cfg *cfg) io_apic_modify_irq(cfg, ~IO_APIC_REDIR_MASKED, 0, NULL); } -#ifdef CONFIG_X86_64 static void io_apic_sync(struct irq_pin_list *entry) { /* @@ -596,11 +586,6 @@ static void __mask_IO_APIC_irq(struct irq_cfg *cfg) { io_apic_modify_irq(cfg, ~0, IO_APIC_REDIR_MASKED, &io_apic_sync); } -#else /* CONFIG_X86_32 */ -static void __mask_IO_APIC_irq(struct irq_cfg *cfg) -{ - io_apic_modify_irq(cfg, ~0, IO_APIC_REDIR_MASKED, NULL); -} static void __mask_and_edge_IO_APIC_irq(struct irq_cfg *cfg) { @@ -613,7 +598,6 @@ static void __unmask_and_level_IO_APIC_irq(struct irq_cfg *cfg) io_apic_modify_irq(cfg, ~IO_APIC_REDIR_MASKED, IO_APIC_REDIR_LEVEL_TRIGGER, NULL); } -#endif /* CONFIG_X86_32 */ static void mask_IO_APIC_irq_desc(struct irq_desc *desc) { @@ -1702,12 +1686,8 @@ __apicdebuginit(void) print_IO_APIC(void) if (!entry) continue; printk(KERN_DEBUG "IRQ%d ", irq); - for (;;) { + for_each_irq_pin(entry, cfg->irq_2_pin) printk("-> %d:%d", entry->apic, entry->pin); - if (!entry->next) - break; - entry = entry->next; - } printk("\n"); } @@ -2211,7 +2191,6 @@ static unsigned int startup_ioapic_irq(unsigned int irq) return was_pending; } -#ifdef CONFIG_X86_64 static int ioapic_retrigger_irq(unsigned int irq) { @@ -2224,14 +2203,6 @@ static int ioapic_retrigger_irq(unsigned int irq) return 1; } -#else -static int ioapic_retrigger_irq(unsigned int irq) -{ - apic->send_IPI_self(irq_cfg(irq)->vector); - - return 1; -} -#endif /* * Level and edge triggered IO-APIC interrupts need different handling, @@ -2269,13 +2240,9 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq struct irq_pin_list *entry; u8 vector = cfg->vector; - entry = cfg->irq_2_pin; - for (;;) { + for_each_irq_pin(entry, cfg->irq_2_pin) { unsigned int reg; - if (!entry) - break; - apic = entry->apic; pin = entry->pin; /* @@ -2288,9 +2255,6 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq reg &= ~IO_APIC_REDIR_VECTOR_MASK; reg |= vector; io_apic_modify(apic, 0x10 + pin*2, reg); - if (!entry->next) - break; - entry = entry->next; } } @@ -2515,11 +2479,8 @@ atomic_t irq_mis_count; static void ack_apic_level(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); - -#ifdef CONFIG_X86_32 unsigned long v; int i; -#endif struct irq_cfg *cfg; int do_unmask_irq = 0; @@ -2532,31 +2493,28 @@ static void ack_apic_level(unsigned int irq) } #endif -#ifdef CONFIG_X86_32 /* - * It appears there is an erratum which affects at least version 0x11 - * of I/O APIC (that's the 82093AA and cores integrated into various - * chipsets). Under certain conditions a level-triggered interrupt is - * erroneously delivered as edge-triggered one but the respective IRR - * bit gets set nevertheless. As a result the I/O unit expects an EOI - * message but it will never arrive and further interrupts are blocked - * from the source. The exact reason is so far unknown, but the - * phenomenon was observed when two consecutive interrupt requests - * from a given source get delivered to the same CPU and the source is - * temporarily disabled in between. - * - * A workaround is to simulate an EOI message manually. We achieve it - * by setting the trigger mode to edge and then to level when the edge - * trigger mode gets detected in the TMR of a local APIC for a - * level-triggered interrupt. We mask the source for the time of the - * operation to prevent an edge-triggered interrupt escaping meanwhile. - * The idea is from Manfred Spraul. --macro - */ + * It appears there is an erratum which affects at least version 0x11 + * of I/O APIC (that's the 82093AA and cores integrated into various + * chipsets). Under certain conditions a level-triggered interrupt is + * erroneously delivered as edge-triggered one but the respective IRR + * bit gets set nevertheless. As a result the I/O unit expects an EOI + * message but it will never arrive and further interrupts are blocked + * from the source. The exact reason is so far unknown, but the + * phenomenon was observed when two consecutive interrupt requests + * from a given source get delivered to the same CPU and the source is + * temporarily disabled in between. + * + * A workaround is to simulate an EOI message manually. We achieve it + * by setting the trigger mode to edge and then to level when the edge + * trigger mode gets detected in the TMR of a local APIC for a + * level-triggered interrupt. We mask the source for the time of the + * operation to prevent an edge-triggered interrupt escaping meanwhile. + * The idea is from Manfred Spraul. --macro + */ cfg = desc->chip_data; i = cfg->vector; - v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1)); -#endif /* * We must acknowledge the irq before we move it or the acknowledge will @@ -2598,7 +2556,7 @@ static void ack_apic_level(unsigned int irq) unmask_IO_APIC_irq_desc(desc); } -#ifdef CONFIG_X86_32 + /* Tail end of version 0x11 I/O APIC bug workaround */ if (!(v & (1 << (i & 0x1f)))) { atomic_inc(&irq_mis_count); spin_lock(&ioapic_lock); @@ -2606,26 +2564,15 @@ static void ack_apic_level(unsigned int irq) __unmask_and_level_IO_APIC_irq(cfg); spin_unlock(&ioapic_lock); } -#endif } #ifdef CONFIG_INTR_REMAP static void __eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg) { - int apic, pin; struct irq_pin_list *entry; - entry = cfg->irq_2_pin; - for (;;) { - - if (!entry) - break; - - apic = entry->apic; - pin = entry->pin; - io_apic_eoi(apic, pin); - entry = entry->next; - } + for_each_irq_pin(entry, cfg->irq_2_pin) + io_apic_eoi(entry->apic, entry->pin); } static void @@ -3241,8 +3188,7 @@ void destroy_irq(unsigned int irq) cfg = desc->chip_data; dynamic_irq_cleanup(irq); /* connect back irq_cfg */ - if (desc) - desc->chip_data = cfg; + desc->chip_data = cfg; free_irte(irq); spin_lock_irqsave(&vector_lock, flags); @@ -3912,7 +3858,11 @@ static int __io_apic_set_pci_routing(struct device *dev, int irq, */ if (irq >= NR_IRQS_LEGACY) { cfg = desc->chip_data; - add_pin_to_irq_node(cfg, node, ioapic, pin); + if (add_pin_to_irq_node_nopanic(cfg, node, ioapic, pin)) { + printk(KERN_INFO "can not add pin %d for irq %d\n", + pin, irq); + return 0; + } } setup_IO_APIC_irq(ioapic, pin, irq, desc, trigger, polarity); @@ -3941,11 +3891,28 @@ int io_apic_set_pci_routing(struct device *dev, int irq, return __io_apic_set_pci_routing(dev, irq, irq_attr); } -/* -------------------------------------------------------------------------- - ACPI-based IOAPIC Configuration - -------------------------------------------------------------------------- */ +u8 __init io_apic_unique_id(u8 id) +{ +#ifdef CONFIG_X86_32 + if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && + !APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) + return io_apic_get_unique_id(nr_ioapics, id); + else + return id; +#else + int i; + DECLARE_BITMAP(used, 256); -#ifdef CONFIG_ACPI + bitmap_zero(used, 256); + for (i = 0; i < nr_ioapics; i++) { + struct mpc_ioapic *ia = &mp_ioapics[i]; + __set_bit(ia->apicid, used); + } + if (!test_bit(id, used)) + return id; + return find_first_zero_bit(used, 256); +#endif +} #ifdef CONFIG_X86_32 int __init io_apic_get_unique_id(int ioapic, int apic_id) @@ -4054,8 +4021,6 @@ int acpi_get_override_irq(int bus_irq, int *trigger, int *polarity) return 0; } -#endif /* CONFIG_ACPI */ - /* * This function currently is only a helper for the i386 smp boot process where * we need to reprogram the ioredtbls to cater for the cpus which have come online @@ -4109,7 +4074,7 @@ void __init setup_ioapic_dest(void) static struct resource *ioapic_resources; -static struct resource * __init ioapic_setup_resources(void) +static struct resource * __init ioapic_setup_resources(int nr_ioapics) { unsigned long n; struct resource *res; @@ -4125,15 +4090,13 @@ static struct resource * __init ioapic_setup_resources(void) mem = alloc_bootmem(n); res = (void *)mem; - if (mem != NULL) { - mem += sizeof(struct resource) * nr_ioapics; + mem += sizeof(struct resource) * nr_ioapics; - for (i = 0; i < nr_ioapics; i++) { - res[i].name = mem; - res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY; - sprintf(mem, "IOAPIC %u", i); - mem += IOAPIC_RESOURCE_NAME_SIZE; - } + for (i = 0; i < nr_ioapics; i++) { + res[i].name = mem; + res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY; + sprintf(mem, "IOAPIC %u", i); + mem += IOAPIC_RESOURCE_NAME_SIZE; } ioapic_resources = res; @@ -4147,7 +4110,7 @@ void __init ioapic_init_mappings(void) struct resource *ioapic_res; int i; - ioapic_res = ioapic_setup_resources(); + ioapic_res = ioapic_setup_resources(nr_ioapics); for (i = 0; i < nr_ioapics; i++) { if (smp_found_config) { ioapic_phys = mp_ioapics[i].apicaddr; @@ -4176,11 +4139,9 @@ fake_ioapic_page: __fix_to_virt(idx), ioapic_phys); idx++; - if (ioapic_res != NULL) { - ioapic_res->start = ioapic_phys; - ioapic_res->end = ioapic_phys + (4 * 1024) - 1; - ioapic_res++; - } + ioapic_res->start = ioapic_phys; + ioapic_res->end = ioapic_phys + (4 * 1024) - 1; + ioapic_res++; } } @@ -4201,3 +4162,76 @@ void __init ioapic_insert_resources(void) r++; } } + +int mp_find_ioapic(int gsi) +{ + int i = 0; + + /* Find the IOAPIC that manages this GSI. */ + for (i = 0; i < nr_ioapics; i++) { + if ((gsi >= mp_gsi_routing[i].gsi_base) + && (gsi <= mp_gsi_routing[i].gsi_end)) + return i; + } + + printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi); + return -1; +} + +int mp_find_ioapic_pin(int ioapic, int gsi) +{ + if (WARN_ON(ioapic == -1)) + return -1; + if (WARN_ON(gsi > mp_gsi_routing[ioapic].gsi_end)) + return -1; + + return gsi - mp_gsi_routing[ioapic].gsi_base; +} + +static int bad_ioapic(unsigned long address) +{ + if (nr_ioapics >= MAX_IO_APICS) { + printk(KERN_WARNING "WARING: Max # of I/O APICs (%d) exceeded " + "(found %d), skipping\n", MAX_IO_APICS, nr_ioapics); + return 1; + } + if (!address) { + printk(KERN_WARNING "WARNING: Bogus (zero) I/O APIC address" + " found in table, skipping!\n"); + return 1; + } + return 0; +} + +void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) +{ + int idx = 0; + + if (bad_ioapic(address)) + return; + + idx = nr_ioapics; + + mp_ioapics[idx].type = MP_IOAPIC; + mp_ioapics[idx].flags = MPC_APIC_USABLE; + mp_ioapics[idx].apicaddr = address; + + set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); + mp_ioapics[idx].apicid = io_apic_unique_id(id); + mp_ioapics[idx].apicver = io_apic_get_version(idx); + + /* + * Build basic GSI lookup table to facilitate gsi->io_apic lookups + * and to prevent reprogramming of IOAPIC pins (PCI GSIs). + */ + mp_gsi_routing[idx].gsi_base = gsi_base; + mp_gsi_routing[idx].gsi_end = gsi_base + + io_apic_get_redir_entries(idx); + + printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, " + "GSI %d-%d\n", idx, mp_ioapics[idx].apicid, + mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr, + mp_gsi_routing[idx].gsi_base, mp_gsi_routing[idx].gsi_end); + + nr_ioapics++; +} diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c index 6ef00ba4c88..08385e090a6 100644 --- a/arch/x86/kernel/apic/ipi.c +++ b/arch/x86/kernel/apic/ipi.c @@ -153,7 +153,7 @@ int safe_smp_processor_id(void) { int apicid, cpuid; - if (!boot_cpu_has(X86_FEATURE_APIC)) + if (!cpu_has_apic) return 0; apicid = hard_smp_processor_id(); diff --git a/arch/x86/kernel/apic/nmi.c b/arch/x86/kernel/apic/nmi.c index b3025b43b63..db7220220d0 100644 --- a/arch/x86/kernel/apic/nmi.c +++ b/arch/x86/kernel/apic/nmi.c @@ -39,7 +39,7 @@ int unknown_nmi_panic; int nmi_watchdog_enabled; -static cpumask_var_t backtrace_mask; +static cpumask_t backtrace_mask __read_mostly; /* nmi_active: * >0: the lapic NMI watchdog is active, but can be disabled @@ -138,7 +138,6 @@ int __init check_nmi_watchdog(void) if (!prev_nmi_count) goto error; - alloc_cpumask_var(&backtrace_mask, GFP_KERNEL|__GFP_ZERO); printk(KERN_INFO "Testing NMI watchdog ... "); #ifdef CONFIG_SMP @@ -415,14 +414,17 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason) } /* We can be called before check_nmi_watchdog, hence NULL check. */ - if (backtrace_mask != NULL && cpumask_test_cpu(cpu, backtrace_mask)) { + if (cpumask_test_cpu(cpu, &backtrace_mask)) { static DEFINE_SPINLOCK(lock); /* Serialise the printks */ spin_lock(&lock); printk(KERN_WARNING "NMI backtrace for cpu %d\n", cpu); + show_regs(regs); dump_stack(); spin_unlock(&lock); - cpumask_clear_cpu(cpu, backtrace_mask); + cpumask_clear_cpu(cpu, &backtrace_mask); + + rc = 1; } /* Could check oops_in_progress here too, but it's safer not to */ @@ -552,14 +554,18 @@ int do_nmi_callback(struct pt_regs *regs, int cpu) return 0; } -void __trigger_all_cpu_backtrace(void) +void arch_trigger_all_cpu_backtrace(void) { int i; - cpumask_copy(backtrace_mask, cpu_online_mask); + cpumask_copy(&backtrace_mask, cpu_online_mask); + + printk(KERN_INFO "sending NMI to all CPUs:\n"); + apic->send_IPI_all(NMI_VECTOR); + /* Wait for up to 10 seconds for all CPUs to do the backtrace */ for (i = 0; i < 10 * 1000; i++) { - if (cpumask_empty(backtrace_mask)) + if (cpumask_empty(&backtrace_mask)) break; mdelay(1); } diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c index fcec2f1d34a..65edc180fc8 100644 --- a/arch/x86/kernel/apic/probe_64.c +++ b/arch/x86/kernel/apic/probe_64.c @@ -55,11 +55,11 @@ static int apicid_phys_pkg_id(int initial_apic_id, int index_msb) void __init default_setup_apic_routing(void) { #ifdef CONFIG_X86_X2APIC - if (x2apic_mode && (apic != &apic_x2apic_phys && + if (x2apic_mode #ifdef CONFIG_X86_UV - apic != &apic_x2apic_uv_x && + && apic != &apic_x2apic_uv_x #endif - apic != &apic_x2apic_cluster)) { + ) { if (x2apic_phys) apic = &apic_x2apic_phys; else diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c index 442b5508893..151ace69a5a 100644 --- a/arch/x86/kernel/apm_32.c +++ b/arch/x86/kernel/apm_32.c @@ -403,7 +403,15 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue); static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue); static struct apm_user *user_list; static DEFINE_SPINLOCK(user_list_lock); -static const struct desc_struct bad_bios_desc = { { { 0, 0x00409200 } } }; + +/* + * Set up a segment that references the real mode segment 0x40 + * that extends up to the end of page zero (that we have reserved). + * This is for buggy BIOS's that refer to (real mode) segment 0x40 + * even though they are called in protected mode. + */ +static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092, + (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1); static const char driver_version[] = "1.16ac"; /* no spaces */ @@ -2332,15 +2340,6 @@ static int __init apm_init(void) pm_flags |= PM_APM; /* - * Set up a segment that references the real mode segment 0x40 - * that extends up to the end of page zero (that we have reserved). - * This is for buggy BIOS's that refer to (real mode) segment 0x40 - * even though they are called in protected mode. - */ - set_base(bad_bios_desc, __va((unsigned long)0x40 << 4)); - _set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4)); - - /* * Set up the long jump entry point to the APM BIOS, which is called * from inline assembly. */ @@ -2358,12 +2357,12 @@ static int __init apm_init(void) * code to that CPU. */ gdt = get_cpu_gdt_table(0); - set_base(gdt[APM_CS >> 3], - __va((unsigned long)apm_info.bios.cseg << 4)); - set_base(gdt[APM_CS_16 >> 3], - __va((unsigned long)apm_info.bios.cseg_16 << 4)); - set_base(gdt[APM_DS >> 3], - __va((unsigned long)apm_info.bios.dseg << 4)); + set_desc_base(&gdt[APM_CS >> 3], + (unsigned long)__va((unsigned long)apm_info.bios.cseg << 4)); + set_desc_base(&gdt[APM_CS_16 >> 3], + (unsigned long)__va((unsigned long)apm_info.bios.cseg_16 << 4)); + set_desc_base(&gdt[APM_DS >> 3], + (unsigned long)__va((unsigned long)apm_info.bios.dseg << 4)); proc_create("apm", 0, NULL, &apm_file_ops); diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 63fddcd082c..22a47c82f3c 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -2,7 +2,7 @@ #include <linux/bitops.h> #include <linux/mm.h> -#include <asm/io.h> +#include <linux/io.h> #include <asm/processor.h> #include <asm/apic.h> #include <asm/cpu.h> @@ -45,8 +45,8 @@ static void __cpuinit init_amd_k5(struct cpuinfo_x86 *c) #define CBAR_ENB (0x80000000) #define CBAR_KEY (0X000000CB) if (c->x86_model == 9 || c->x86_model == 10) { - if (inl (CBAR) & CBAR_ENB) - outl (0 | CBAR_KEY, CBAR); + if (inl(CBAR) & CBAR_ENB) + outl(0 | CBAR_KEY, CBAR); } } @@ -87,9 +87,10 @@ static void __cpuinit init_amd_k6(struct cpuinfo_x86 *c) d = d2-d; if (d > 20*K6_BUG_LOOP) - printk("system stability may be impaired when more than 32 MB are used.\n"); + printk(KERN_CONT + "system stability may be impaired when more than 32 MB are used.\n"); else - printk("probably OK (after B9730xxxx).\n"); + printk(KERN_CONT "probably OK (after B9730xxxx).\n"); printk(KERN_INFO "Please see http://membres.lycos.fr/poulot/k6bug.html\n"); } @@ -219,8 +220,9 @@ static void __cpuinit init_amd_k7(struct cpuinfo_x86 *c) if ((c->x86_model == 8 && c->x86_mask >= 1) || (c->x86_model > 8)) { rdmsr(MSR_K7_CLK_CTL, l, h); if ((l & 0xfff00000) != 0x20000000) { - printk ("CPU: CLK_CTL MSR was %x. Reprogramming to %x\n", l, - ((l & 0x000fffff)|0x20000000)); + printk(KERN_INFO + "CPU: CLK_CTL MSR was %x. Reprogramming to %x\n", + l, ((l & 0x000fffff)|0x20000000)); wrmsr(MSR_K7_CLK_CTL, (l & 0x000fffff)|0x20000000, h); } } @@ -251,6 +253,64 @@ static int __cpuinit nearby_node(int apicid) #endif /* + * Fixup core topology information for AMD multi-node processors. + * Assumption 1: Number of cores in each internal node is the same. + * Assumption 2: Mixed systems with both single-node and dual-node + * processors are not supported. + */ +#ifdef CONFIG_X86_HT +static void __cpuinit amd_fixup_dcm(struct cpuinfo_x86 *c) +{ +#ifdef CONFIG_PCI + u32 t, cpn; + u8 n, n_id; + int cpu = smp_processor_id(); + + /* fixup topology information only once for a core */ + if (cpu_has(c, X86_FEATURE_AMD_DCM)) + return; + + /* check for multi-node processor on boot cpu */ + t = read_pci_config(0, 24, 3, 0xe8); + if (!(t & (1 << 29))) + return; + + set_cpu_cap(c, X86_FEATURE_AMD_DCM); + + /* cores per node: each internal node has half the number of cores */ + cpn = c->x86_max_cores >> 1; + + /* even-numbered NB_id of this dual-node processor */ + n = c->phys_proc_id << 1; + + /* + * determine internal node id and assign cores fifty-fifty to + * each node of the dual-node processor + */ + t = read_pci_config(0, 24 + n, 3, 0xe8); + n = (t>>30) & 0x3; + if (n == 0) { + if (c->cpu_core_id < cpn) + n_id = 0; + else + n_id = 1; + } else { + if (c->cpu_core_id < cpn) + n_id = 1; + else + n_id = 0; + } + + /* compute entire NodeID, use llc_shared_map to store sibling info */ + per_cpu(cpu_llc_id, cpu) = (c->phys_proc_id << 1) + n_id; + + /* fixup core id to be in range from 0 to cpn */ + c->cpu_core_id = c->cpu_core_id % cpn; +#endif +} +#endif + +/* * On a AMD dual core setup the lower bits of the APIC id distingush the cores. * Assumes number of cores is a power of two. */ @@ -267,6 +327,9 @@ static void __cpuinit amd_detect_cmp(struct cpuinfo_x86 *c) c->phys_proc_id = c->initial_apicid >> bits; /* use socket ID also for last level cache */ per_cpu(cpu_llc_id, cpu) = c->phys_proc_id; + /* fixup topology information on multi-node processors */ + if ((c->x86 == 0x10) && (c->x86_model == 9)) + amd_fixup_dcm(c); #endif } @@ -275,9 +338,10 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c) #if defined(CONFIG_NUMA) && defined(CONFIG_X86_64) int cpu = smp_processor_id(); int node; - unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid; + unsigned apicid = c->apicid; + + node = per_cpu(cpu_llc_id, cpu); - node = c->phys_proc_id; if (apicid_to_node[apicid] != NUMA_NO_NODE) node = apicid_to_node[apicid]; if (!node_online(node)) { @@ -398,18 +462,30 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) u32 level; level = cpuid_eax(1); - if((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58) + if ((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58) set_cpu_cap(c, X86_FEATURE_REP_GOOD); /* * Some BIOSes incorrectly force this feature, but only K8 * revision D (model = 0x14) and later actually support it. + * (AMD Erratum #110, docId: 25759). */ - if (c->x86_model < 0x14) + if (c->x86_model < 0x14 && cpu_has(c, X86_FEATURE_LAHF_LM)) { + u64 val; + clear_cpu_cap(c, X86_FEATURE_LAHF_LM); + if (!rdmsrl_amd_safe(0xc001100d, &val)) { + val &= ~(1ULL << 32); + wrmsrl_amd_safe(0xc001100d, val); + } + } + } if (c->x86 == 0x10 || c->x86 == 0x11) set_cpu_cap(c, X86_FEATURE_REP_GOOD); + + /* get apicid instead of initial apic id from cpuid */ + c->apicid = hard_smp_processor_id(); #else /* @@ -494,27 +570,30 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) * benefit in doing so. */ if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg)) { - printk(KERN_DEBUG "tseg: %010llx\n", tseg); - if ((tseg>>PMD_SHIFT) < + printk(KERN_DEBUG "tseg: %010llx\n", tseg); + if ((tseg>>PMD_SHIFT) < (max_low_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) || - ((tseg>>PMD_SHIFT) < + ((tseg>>PMD_SHIFT) < (max_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) && - (tseg>>PMD_SHIFT) >= (1ULL<<(32 - PMD_SHIFT)))) - set_memory_4k((unsigned long)__va(tseg), 1); + (tseg>>PMD_SHIFT) >= (1ULL<<(32 - PMD_SHIFT)))) + set_memory_4k((unsigned long)__va(tseg), 1); } } #endif } #ifdef CONFIG_X86_32 -static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 *c, unsigned int size) +static unsigned int __cpuinit amd_size_cache(struct cpuinfo_x86 *c, + unsigned int size) { /* AMD errata T13 (order #21922) */ if ((c->x86 == 6)) { - if (c->x86_model == 3 && c->x86_mask == 0) /* Duron Rev A0 */ + /* Duron Rev A0 */ + if (c->x86_model == 3 && c->x86_mask == 0) size = 64; + /* Tbird rev A1/A2 */ if (c->x86_model == 4 && - (c->x86_mask == 0 || c->x86_mask == 1)) /* Tbird rev A1/A2 */ + (c->x86_mask == 0 || c->x86_mask == 1)) size = 256; } return size; diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index c8e315f1aa8..01a26521239 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -81,7 +81,7 @@ static void __init check_fpu(void) boot_cpu_data.fdiv_bug = fdiv_bug; if (boot_cpu_data.fdiv_bug) - printk("Hmm, FPU with FDIV bug.\n"); + printk(KERN_WARNING "Hmm, FPU with FDIV bug.\n"); } static void __init check_hlt(void) @@ -98,7 +98,7 @@ static void __init check_hlt(void) halt(); halt(); halt(); - printk("OK.\n"); + printk(KERN_CONT "OK.\n"); } /* @@ -122,9 +122,9 @@ static void __init check_popad(void) * CPU hard. Too bad. */ if (res != 12345678) - printk("Buggy.\n"); + printk(KERN_CONT "Buggy.\n"); else - printk("OK.\n"); + printk(KERN_CONT "OK.\n"); #endif } @@ -156,7 +156,7 @@ void __init check_bugs(void) { identify_boot_cpu(); #ifndef CONFIG_SMP - printk("CPU: "); + printk(KERN_INFO "CPU: "); print_cpu_info(&boot_cpu_data); #endif check_config(); diff --git a/arch/x86/kernel/cpu/bugs_64.c b/arch/x86/kernel/cpu/bugs_64.c index 9a3ed0649d4..04f0fe5af83 100644 --- a/arch/x86/kernel/cpu/bugs_64.c +++ b/arch/x86/kernel/cpu/bugs_64.c @@ -15,7 +15,7 @@ void __init check_bugs(void) { identify_boot_cpu(); #if !defined(CONFIG_SMP) - printk("CPU: "); + printk(KERN_INFO "CPU: "); print_cpu_info(&boot_cpu_data); #endif alternative_instructions(); diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 5ce60a88027..2055fc2b2e6 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -18,8 +18,8 @@ #include <asm/hypervisor.h> #include <asm/processor.h> #include <asm/sections.h> -#include <asm/topology.h> -#include <asm/cpumask.h> +#include <linux/topology.h> +#include <linux/cpumask.h> #include <asm/pgtable.h> #include <asm/atomic.h> #include <asm/proto.h> @@ -28,13 +28,13 @@ #include <asm/desc.h> #include <asm/i387.h> #include <asm/mtrr.h> -#include <asm/numa.h> +#include <linux/numa.h> #include <asm/asm.h> #include <asm/cpu.h> #include <asm/mce.h> #include <asm/msr.h> #include <asm/pat.h> -#include <asm/smp.h> +#include <linux/smp.h> #ifdef CONFIG_X86_LOCAL_APIC #include <asm/uv/uv.h> @@ -94,45 +94,45 @@ DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = { * TLS descriptors are currently at a different place compared to i386. * Hopefully nobody expects them at a fixed place (Wine?) */ - [GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } }, - [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } }, - [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } }, - [GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } }, - [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } }, - [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } }, + [GDT_ENTRY_KERNEL32_CS] = GDT_ENTRY_INIT(0xc09b, 0, 0xfffff), + [GDT_ENTRY_KERNEL_CS] = GDT_ENTRY_INIT(0xa09b, 0, 0xfffff), + [GDT_ENTRY_KERNEL_DS] = GDT_ENTRY_INIT(0xc093, 0, 0xfffff), + [GDT_ENTRY_DEFAULT_USER32_CS] = GDT_ENTRY_INIT(0xc0fb, 0, 0xfffff), + [GDT_ENTRY_DEFAULT_USER_DS] = GDT_ENTRY_INIT(0xc0f3, 0, 0xfffff), + [GDT_ENTRY_DEFAULT_USER_CS] = GDT_ENTRY_INIT(0xa0fb, 0, 0xfffff), #else - [GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } }, - [GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } }, - [GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } }, - [GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } }, + [GDT_ENTRY_KERNEL_CS] = GDT_ENTRY_INIT(0xc09a, 0, 0xfffff), + [GDT_ENTRY_KERNEL_DS] = GDT_ENTRY_INIT(0xc092, 0, 0xfffff), + [GDT_ENTRY_DEFAULT_USER_CS] = GDT_ENTRY_INIT(0xc0fa, 0, 0xfffff), + [GDT_ENTRY_DEFAULT_USER_DS] = GDT_ENTRY_INIT(0xc0f2, 0, 0xfffff), /* * Segments used for calling PnP BIOS have byte granularity. * They code segments and data segments have fixed 64k limits, * the transfer segment sizes are set at run time. */ /* 32-bit code */ - [GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } }, + [GDT_ENTRY_PNPBIOS_CS32] = GDT_ENTRY_INIT(0x409a, 0, 0xffff), /* 16-bit code */ - [GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } }, + [GDT_ENTRY_PNPBIOS_CS16] = GDT_ENTRY_INIT(0x009a, 0, 0xffff), /* 16-bit data */ - [GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } }, + [GDT_ENTRY_PNPBIOS_DS] = GDT_ENTRY_INIT(0x0092, 0, 0xffff), /* 16-bit data */ - [GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } }, + [GDT_ENTRY_PNPBIOS_TS1] = GDT_ENTRY_INIT(0x0092, 0, 0), /* 16-bit data */ - [GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } }, + [GDT_ENTRY_PNPBIOS_TS2] = GDT_ENTRY_INIT(0x0092, 0, 0), /* * The APM segments have byte granularity and their bases * are set at run time. All have 64k limits. */ /* 32-bit code */ - [GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } }, + [GDT_ENTRY_APMBIOS_BASE] = GDT_ENTRY_INIT(0x409a, 0, 0xffff), /* 16-bit code */ - [GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } }, + [GDT_ENTRY_APMBIOS_BASE+1] = GDT_ENTRY_INIT(0x009a, 0, 0xffff), /* data */ - [GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } }, + [GDT_ENTRY_APMBIOS_BASE+2] = GDT_ENTRY_INIT(0x4092, 0, 0xffff), - [GDT_ENTRY_ESPFIX_SS] = { { { 0x0000ffff, 0x00cf9200 } } }, - [GDT_ENTRY_PERCPU] = { { { 0x0000ffff, 0x00cf9200 } } }, + [GDT_ENTRY_ESPFIX_SS] = GDT_ENTRY_INIT(0xc092, 0, 0xfffff), + [GDT_ENTRY_PERCPU] = GDT_ENTRY_INIT(0xc092, 0, 0xfffff), GDT_STACK_CANARY_INIT #endif } }; @@ -982,18 +982,26 @@ static __init int setup_disablecpuid(char *arg) __setup("clearcpuid=", setup_disablecpuid); #ifdef CONFIG_X86_64 -struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table }; +struct desc_ptr idt_descr = { NR_VECTORS * 16 - 1, (unsigned long) idt_table }; DEFINE_PER_CPU_FIRST(union irq_stack_union, irq_stack_union) __aligned(PAGE_SIZE); -DEFINE_PER_CPU(char *, irq_stack_ptr) = - init_per_cpu_var(irq_stack_union.irq_stack) + IRQ_STACK_SIZE - 64; +/* + * The following four percpu variables are hot. Align current_task to + * cacheline size such that all four fall in the same cacheline. + */ +DEFINE_PER_CPU(struct task_struct *, current_task) ____cacheline_aligned = + &init_task; +EXPORT_PER_CPU_SYMBOL(current_task); DEFINE_PER_CPU(unsigned long, kernel_stack) = (unsigned long)&init_thread_union - KERNEL_STACK_OFFSET + THREAD_SIZE; EXPORT_PER_CPU_SYMBOL(kernel_stack); +DEFINE_PER_CPU(char *, irq_stack_ptr) = + init_per_cpu_var(irq_stack_union.irq_stack) + IRQ_STACK_SIZE - 64; + DEFINE_PER_CPU(unsigned int, irq_count) = -1; /* @@ -1008,8 +1016,7 @@ static const unsigned int exception_stack_sizes[N_EXCEPTION_STACKS] = { }; static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks - [(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]) - __aligned(PAGE_SIZE); + [(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]); /* May not be marked __init: used by software suspend */ void syscall_init(void) @@ -1042,8 +1049,11 @@ DEFINE_PER_CPU(struct orig_ist, orig_ist); #else /* CONFIG_X86_64 */ +DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task; +EXPORT_PER_CPU_SYMBOL(current_task); + #ifdef CONFIG_CC_STACKPROTECTOR -DEFINE_PER_CPU(unsigned long, stack_canary); +DEFINE_PER_CPU_ALIGNED(struct stack_canary, stack_canary); #endif /* Make sure %fs and %gs are initialized properly in idle threads */ diff --git a/arch/x86/kernel/cpu/cyrix.c b/arch/x86/kernel/cpu/cyrix.c index 593171e967e..19807b89f05 100644 --- a/arch/x86/kernel/cpu/cyrix.c +++ b/arch/x86/kernel/cpu/cyrix.c @@ -3,10 +3,10 @@ #include <linux/delay.h> #include <linux/pci.h> #include <asm/dma.h> -#include <asm/io.h> +#include <linux/io.h> #include <asm/processor-cyrix.h> #include <asm/processor-flags.h> -#include <asm/timer.h> +#include <linux/timer.h> #include <asm/pci-direct.h> #include <asm/tsc.h> @@ -282,7 +282,8 @@ static void __cpuinit init_cyrix(struct cpuinfo_x86 *c) * The 5510/5520 companion chips have a funky PIT. */ if (vendor == PCI_VENDOR_ID_CYRIX && - (device == PCI_DEVICE_ID_CYRIX_5510 || device == PCI_DEVICE_ID_CYRIX_5520)) + (device == PCI_DEVICE_ID_CYRIX_5510 || + device == PCI_DEVICE_ID_CYRIX_5520)) mark_tsc_unstable("cyrix 5510/5520 detected"); } #endif @@ -299,7 +300,8 @@ static void __cpuinit init_cyrix(struct cpuinfo_x86 *c) * ? : 0x7x * GX1 : 0x8x GX1 datasheet 56 */ - if ((0x30 <= dir1 && dir1 <= 0x6f) || (0x80 <= dir1 && dir1 <= 0x8f)) + if ((0x30 <= dir1 && dir1 <= 0x6f) || + (0x80 <= dir1 && dir1 <= 0x8f)) geode_configure(); return; } else { /* MediaGX */ @@ -427,9 +429,12 @@ static void __cpuinit cyrix_identify(struct cpuinfo_x86 *c) printk(KERN_INFO "Enabling CPUID on Cyrix processor.\n"); local_irq_save(flags); ccr3 = getCx86(CX86_CCR3); - setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */ - setCx86_old(CX86_CCR4, getCx86_old(CX86_CCR4) | 0x80); /* enable cpuid */ - setCx86(CX86_CCR3, ccr3); /* disable MAPEN */ + /* enable MAPEN */ + setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); + /* enable cpuid */ + setCx86_old(CX86_CCR4, getCx86_old(CX86_CCR4) | 0x80); + /* disable MAPEN */ + setCx86(CX86_CCR3, ccr3); local_irq_restore(flags); } } diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c index fb5b86af0b0..93ba8eeb100 100644 --- a/arch/x86/kernel/cpu/hypervisor.c +++ b/arch/x86/kernel/cpu/hypervisor.c @@ -28,11 +28,10 @@ static inline void __cpuinit detect_hypervisor_vendor(struct cpuinfo_x86 *c) { - if (vmware_platform()) { + if (vmware_platform()) c->x86_hyper_vendor = X86_HYPER_VENDOR_VMWARE; - } else { + else c->x86_hyper_vendor = X86_HYPER_VENDOR_NONE; - } } unsigned long get_hypervisor_tsc_freq(void) diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 3260ab04499..80a722a071b 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -7,17 +7,17 @@ #include <linux/sched.h> #include <linux/thread_info.h> #include <linux/module.h> +#include <linux/uaccess.h> #include <asm/processor.h> #include <asm/pgtable.h> #include <asm/msr.h> -#include <asm/uaccess.h> #include <asm/ds.h> #include <asm/bugs.h> #include <asm/cpu.h> #ifdef CONFIG_X86_64 -#include <asm/topology.h> +#include <linux/topology.h> #include <asm/numa_64.h> #endif @@ -174,7 +174,8 @@ static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c) #ifdef CONFIG_X86_F00F_BUG /* * All current models of Pentium and Pentium with MMX technology CPUs - * have the F0 0F bug, which lets nonprivileged users lock up the system. + * have the F0 0F bug, which lets nonprivileged users lock up the + * system. * Note that the workaround only should be initialized once... */ c->f00f_bug = 0; @@ -207,7 +208,7 @@ static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c) printk (KERN_INFO "CPU: C0 stepping P4 Xeon detected.\n"); printk (KERN_INFO "CPU: Disabling hardware prefetching (Errata 037)\n"); lo |= MSR_IA32_MISC_ENABLE_PREFETCH_DISABLE; - wrmsr (MSR_IA32_MISC_ENABLE, lo, hi); + wrmsr(MSR_IA32_MISC_ENABLE, lo, hi); } } @@ -283,7 +284,7 @@ static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c) /* Intel has a non-standard dependency on %ecx for this CPUID level. */ cpuid_count(4, 0, &eax, &ebx, &ecx, &edx); if (eax & 0x1f) - return ((eax >> 26) + 1); + return (eax >> 26) + 1; else return 1; } diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c index 789efe217e1..804c40e2bc3 100644 --- a/arch/x86/kernel/cpu/intel_cacheinfo.c +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c @@ -3,7 +3,7 @@ * * Changes: * Venkatesh Pallipadi : Adding cache identification through cpuid(4) - * Ashok Raj <ashok.raj@intel.com>: Work with CPU hotplug infrastructure. + * Ashok Raj <ashok.raj@intel.com>: Work with CPU hotplug infrastructure. * Andi Kleen / Andreas Herrmann : CPUID4 emulation on AMD. */ @@ -16,7 +16,7 @@ #include <linux/pci.h> #include <asm/processor.h> -#include <asm/smp.h> +#include <linux/smp.h> #include <asm/k8.h> #define LVL_1_INST 1 @@ -25,14 +25,15 @@ #define LVL_3 4 #define LVL_TRACE 5 -struct _cache_table -{ +struct _cache_table { unsigned char descriptor; char cache_type; short size; }; -/* all the cache descriptor types we care about (no TLB or trace cache entries) */ +/* All the cache descriptor types we care about (no TLB or + trace cache entries) */ + static const struct _cache_table __cpuinitconst cache_table[] = { { 0x06, LVL_1_INST, 8 }, /* 4-way set assoc, 32 byte line size */ @@ -105,8 +106,7 @@ static const struct _cache_table __cpuinitconst cache_table[] = }; -enum _cache_type -{ +enum _cache_type { CACHE_TYPE_NULL = 0, CACHE_TYPE_DATA = 1, CACHE_TYPE_INST = 2, @@ -170,31 +170,31 @@ unsigned short num_cache_leaves; Maybe later */ union l1_cache { struct { - unsigned line_size : 8; - unsigned lines_per_tag : 8; - unsigned assoc : 8; - unsigned size_in_kb : 8; + unsigned line_size:8; + unsigned lines_per_tag:8; + unsigned assoc:8; + unsigned size_in_kb:8; }; unsigned val; }; union l2_cache { struct { - unsigned line_size : 8; - unsigned lines_per_tag : 4; - unsigned assoc : 4; - unsigned size_in_kb : 16; + unsigned line_size:8; + unsigned lines_per_tag:4; + unsigned assoc:4; + unsigned size_in_kb:16; }; unsigned val; }; union l3_cache { struct { - unsigned line_size : 8; - unsigned lines_per_tag : 4; - unsigned assoc : 4; - unsigned res : 2; - unsigned size_encoded : 14; + unsigned line_size:8; + unsigned lines_per_tag:4; + unsigned assoc:4; + unsigned res:2; + unsigned size_encoded:14; }; unsigned val; }; @@ -241,7 +241,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax, case 0: if (!l1->val) return; - assoc = l1->assoc; + assoc = assocs[l1->assoc]; line_size = l1->line_size; lines_per_tag = l1->lines_per_tag; size_in_kb = l1->size_in_kb; @@ -249,7 +249,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax, case 2: if (!l2.val) return; - assoc = l2.assoc; + assoc = assocs[l2.assoc]; line_size = l2.line_size; lines_per_tag = l2.lines_per_tag; /* cpu_data has errata corrections for K7 applied */ @@ -258,10 +258,14 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax, case 3: if (!l3.val) return; - assoc = l3.assoc; + assoc = assocs[l3.assoc]; line_size = l3.line_size; lines_per_tag = l3.lines_per_tag; size_in_kb = l3.size_encoded * 512; + if (boot_cpu_has(X86_FEATURE_AMD_DCM)) { + size_in_kb = size_in_kb >> 1; + assoc = assoc >> 1; + } break; default: return; @@ -270,18 +274,14 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax, eax->split.is_self_initializing = 1; eax->split.type = types[leaf]; eax->split.level = levels[leaf]; - if (leaf == 3) - eax->split.num_threads_sharing = - current_cpu_data.x86_max_cores - 1; - else - eax->split.num_threads_sharing = 0; + eax->split.num_threads_sharing = 0; eax->split.num_cores_on_die = current_cpu_data.x86_max_cores - 1; - if (assoc == 0xf) + if (assoc == 0xffff) eax->split.is_fully_associative = 1; ebx->split.coherency_line_size = line_size - 1; - ebx->split.ways_of_associativity = assocs[assoc] - 1; + ebx->split.ways_of_associativity = assoc - 1; ebx->split.physical_line_partition = lines_per_tag - 1; ecx->split.number_of_sets = (size_in_kb * 1024) / line_size / (ebx->split.ways_of_associativity + 1) - 1; @@ -350,7 +350,8 @@ static int __cpuinit find_num_cache_leaves(void) unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) { - unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0; /* Cache sizes */ + /* Cache sizes */ + unsigned int trace = 0, l1i = 0, l1d = 0, l2 = 0, l3 = 0; unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */ unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */ unsigned int l2_id = 0, l3_id = 0, num_threads_sharing, index_msb; @@ -377,8 +378,8 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) retval = cpuid4_cache_lookup_regs(i, &this_leaf); if (retval >= 0) { - switch(this_leaf.eax.split.level) { - case 1: + switch (this_leaf.eax.split.level) { + case 1: if (this_leaf.eax.split.type == CACHE_TYPE_DATA) new_l1d = this_leaf.size/1024; @@ -386,19 +387,20 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) CACHE_TYPE_INST) new_l1i = this_leaf.size/1024; break; - case 2: + case 2: new_l2 = this_leaf.size/1024; num_threads_sharing = 1 + this_leaf.eax.split.num_threads_sharing; index_msb = get_count_order(num_threads_sharing); l2_id = c->apicid >> index_msb; break; - case 3: + case 3: new_l3 = this_leaf.size/1024; num_threads_sharing = 1 + this_leaf.eax.split.num_threads_sharing; - index_msb = get_count_order(num_threads_sharing); + index_msb = get_count_order( + num_threads_sharing); l3_id = c->apicid >> index_msb; break; - default: + default: break; } } @@ -421,22 +423,21 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) /* Number of times to iterate */ n = cpuid_eax(2) & 0xFF; - for ( i = 0 ; i < n ; i++ ) { + for (i = 0 ; i < n ; i++) { cpuid(2, ®s[0], ®s[1], ®s[2], ®s[3]); /* If bit 31 is set, this is an unknown format */ - for ( j = 0 ; j < 3 ; j++ ) { - if (regs[j] & (1 << 31)) regs[j] = 0; - } + for (j = 0 ; j < 3 ; j++) + if (regs[j] & (1 << 31)) + regs[j] = 0; /* Byte 0 is level count, not a descriptor */ - for ( j = 1 ; j < 16 ; j++ ) { + for (j = 1 ; j < 16 ; j++) { unsigned char des = dp[j]; unsigned char k = 0; /* look up this descriptor in the table */ - while (cache_table[k].descriptor != 0) - { + while (cache_table[k].descriptor != 0) { if (cache_table[k].descriptor == des) { if (only_trace && cache_table[k].cache_type != LVL_TRACE) break; @@ -488,14 +489,14 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c) } if (trace) - printk (KERN_INFO "CPU: Trace cache: %dK uops", trace); - else if ( l1i ) - printk (KERN_INFO "CPU: L1 I cache: %dK", l1i); + printk(KERN_INFO "CPU: Trace cache: %dK uops", trace); + else if (l1i) + printk(KERN_INFO "CPU: L1 I cache: %dK", l1i); if (l1d) - printk(", L1 D cache: %dK\n", l1d); + printk(KERN_CONT ", L1 D cache: %dK\n", l1d); else - printk("\n"); + printk(KERN_CONT "\n"); if (l2) printk(KERN_INFO "CPU: L2 cache: %dK\n", l2); @@ -522,6 +523,18 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) int index_msb, i; struct cpuinfo_x86 *c = &cpu_data(cpu); + if ((index == 3) && (c->x86_vendor == X86_VENDOR_AMD)) { + struct cpuinfo_x86 *d; + for_each_online_cpu(i) { + if (!per_cpu(cpuid4_info, i)) + continue; + d = &cpu_data(i); + this_leaf = CPUID4_INFO_IDX(i, index); + cpumask_copy(to_cpumask(this_leaf->shared_cpu_map), + d->llc_shared_map); + } + return; + } this_leaf = CPUID4_INFO_IDX(cpu, index); num_threads_sharing = 1 + this_leaf->eax.split.num_threads_sharing; @@ -558,8 +571,13 @@ static void __cpuinit cache_remove_shared_cpu_map(unsigned int cpu, int index) } } #else -static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) {} -static void __cpuinit cache_remove_shared_cpu_map(unsigned int cpu, int index) {} +static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) +{ +} + +static void __cpuinit cache_remove_shared_cpu_map(unsigned int cpu, int index) +{ +} #endif static void __cpuinit free_cache_attributes(unsigned int cpu) @@ -645,7 +663,7 @@ static DEFINE_PER_CPU(struct _index_kobject *, index_kobject); static ssize_t show_##file_name \ (struct _cpuid4_info *this_leaf, char *buf) \ { \ - return sprintf (buf, "%lu\n", (unsigned long)this_leaf->object + val); \ + return sprintf(buf, "%lu\n", (unsigned long)this_leaf->object + val); \ } show_one_plus(level, eax.split.level, 0); @@ -656,7 +674,7 @@ show_one_plus(number_of_sets, ecx.split.number_of_sets, 1); static ssize_t show_size(struct _cpuid4_info *this_leaf, char *buf) { - return sprintf (buf, "%luK\n", this_leaf->size / 1024); + return sprintf(buf, "%luK\n", this_leaf->size / 1024); } static ssize_t show_shared_cpu_map_func(struct _cpuid4_info *this_leaf, @@ -669,7 +687,7 @@ static ssize_t show_shared_cpu_map_func(struct _cpuid4_info *this_leaf, const struct cpumask *mask; mask = to_cpumask(this_leaf->shared_cpu_map); - n = type? + n = type ? cpulist_scnprintf(buf, len-2, mask) : cpumask_scnprintf(buf, len-2, mask); buf[n++] = '\n'; @@ -800,7 +818,7 @@ static struct _cache_attr cache_disable_0 = __ATTR(cache_disable_0, 0644, static struct _cache_attr cache_disable_1 = __ATTR(cache_disable_1, 0644, show_cache_disable_1, store_cache_disable_1); -static struct attribute * default_attrs[] = { +static struct attribute *default_attrs[] = { &type.attr, &level.attr, &coherency_line_size.attr, @@ -815,7 +833,7 @@ static struct attribute * default_attrs[] = { NULL }; -static ssize_t show(struct kobject * kobj, struct attribute * attr, char * buf) +static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf) { struct _cache_attr *fattr = to_attr(attr); struct _index_kobject *this_leaf = to_object(kobj); @@ -828,8 +846,8 @@ static ssize_t show(struct kobject * kobj, struct attribute * attr, char * buf) return ret; } -static ssize_t store(struct kobject * kobj, struct attribute * attr, - const char * buf, size_t count) +static ssize_t store(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) { struct _cache_attr *fattr = to_attr(attr); struct _index_kobject *this_leaf = to_object(kobj); @@ -883,7 +901,7 @@ static int __cpuinit cpuid4_cache_sysfs_init(unsigned int cpu) goto err_out; per_cpu(index_kobject, cpu) = kzalloc( - sizeof(struct _index_kobject ) * num_cache_leaves, GFP_KERNEL); + sizeof(struct _index_kobject) * num_cache_leaves, GFP_KERNEL); if (unlikely(per_cpu(index_kobject, cpu) == NULL)) goto err_out; @@ -917,7 +935,7 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev) } for (i = 0; i < num_cache_leaves; i++) { - this_object = INDEX_KOBJECT_PTR(cpu,i); + this_object = INDEX_KOBJECT_PTR(cpu, i); this_object->cpu = cpu; this_object->index = i; retval = kobject_init_and_add(&(this_object->kobj), @@ -925,9 +943,8 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev) per_cpu(cache_kobject, cpu), "index%1lu", i); if (unlikely(retval)) { - for (j = 0; j < i; j++) { - kobject_put(&(INDEX_KOBJECT_PTR(cpu,j)->kobj)); - } + for (j = 0; j < i; j++) + kobject_put(&(INDEX_KOBJECT_PTR(cpu, j)->kobj)); kobject_put(per_cpu(cache_kobject, cpu)); cpuid4_cache_sysfs_exit(cpu); return retval; @@ -952,7 +969,7 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev) cpumask_clear_cpu(cpu, to_cpumask(cache_dev_map)); for (i = 0; i < num_cache_leaves; i++) - kobject_put(&(INDEX_KOBJECT_PTR(cpu,i)->kobj)); + kobject_put(&(INDEX_KOBJECT_PTR(cpu, i)->kobj)); kobject_put(per_cpu(cache_kobject, cpu)); cpuid4_cache_sysfs_exit(cpu); } @@ -977,8 +994,7 @@ static int __cpuinit cacheinfo_cpu_callback(struct notifier_block *nfb, return NOTIFY_OK; } -static struct notifier_block __cpuinitdata cacheinfo_cpu_notifier = -{ +static struct notifier_block __cpuinitdata cacheinfo_cpu_notifier = { .notifier_call = cacheinfo_cpu_callback, }; diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 01213048f62..9bfe9d2ea61 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -183,6 +183,11 @@ void mce_log(struct mce *mce) set_bit(0, &mce_need_notify); } +void __weak decode_mce(struct mce *m) +{ + return; +} + static void print_mce(struct mce *m) { printk(KERN_EMERG @@ -205,6 +210,8 @@ static void print_mce(struct mce *m) printk(KERN_EMERG "PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x\n", m->cpuvendor, m->cpuid, m->time, m->socketid, m->apicid); + + decode_mce(m); } static void print_mce_head(void) @@ -215,7 +222,10 @@ static void print_mce_head(void) static void print_mce_tail(void) { printk(KERN_EMERG "This is not a software problem!\n" - "Run through mcelog --ascii to decode and contact your hardware vendor\n"); +#if (!defined(CONFIG_EDAC) || !defined(CONFIG_CPU_SUP_AMD)) + "Run through mcelog --ascii to decode and contact your hardware vendor\n" +#endif + ); } #define PANIC_TIMEOUT 5 /* 5 seconds */ diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c index ddae21620bd..1fecba404fd 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c @@ -489,12 +489,14 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank) int i, err = 0; struct threshold_bank *b = NULL; char name[32]; + struct cpuinfo_x86 *c = &cpu_data(cpu); + sprintf(name, "threshold_bank%i", bank); #ifdef CONFIG_SMP if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */ - i = cpumask_first(cpu_core_mask(cpu)); + i = cpumask_first(c->llc_shared_map); /* first core not up yet */ if (cpu_data(i).cpu_core_id) @@ -514,7 +516,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank) if (err) goto out; - cpumask_copy(b->cpus, cpu_core_mask(cpu)); + cpumask_copy(b->cpus, c->llc_shared_map); per_cpu(threshold_banks, cpu)[bank] = b; goto out; @@ -539,7 +541,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank) #ifndef CONFIG_SMP cpumask_setall(b->cpus); #else - cpumask_copy(b->cpus, cpu_core_mask(cpu)); + cpumask_copy(b->cpus, c->llc_shared_map); #endif per_cpu(threshold_banks, cpu)[bank] = b; diff --git a/arch/x86/kernel/cpu/mtrr/amd.c b/arch/x86/kernel/cpu/mtrr/amd.c index ee2331b0e58..33af14110df 100644 --- a/arch/x86/kernel/cpu/mtrr/amd.c +++ b/arch/x86/kernel/cpu/mtrr/amd.c @@ -7,15 +7,15 @@ static void amd_get_mtrr(unsigned int reg, unsigned long *base, - unsigned long *size, mtrr_type * type) + unsigned long *size, mtrr_type *type) { unsigned long low, high; rdmsr(MSR_K6_UWCCR, low, high); - /* Upper dword is region 1, lower is region 0 */ + /* Upper dword is region 1, lower is region 0 */ if (reg == 1) low = high; - /* The base masks off on the right alignment */ + /* The base masks off on the right alignment */ *base = (low & 0xFFFE0000) >> PAGE_SHIFT; *type = 0; if (low & 1) @@ -27,74 +27,81 @@ amd_get_mtrr(unsigned int reg, unsigned long *base, return; } /* - * This needs a little explaining. The size is stored as an - * inverted mask of bits of 128K granularity 15 bits long offset - * 2 bits + * This needs a little explaining. The size is stored as an + * inverted mask of bits of 128K granularity 15 bits long offset + * 2 bits. * - * So to get a size we do invert the mask and add 1 to the lowest - * mask bit (4 as its 2 bits in). This gives us a size we then shift - * to turn into 128K blocks + * So to get a size we do invert the mask and add 1 to the lowest + * mask bit (4 as its 2 bits in). This gives us a size we then shift + * to turn into 128K blocks. * - * eg 111 1111 1111 1100 is 512K + * eg 111 1111 1111 1100 is 512K * - * invert 000 0000 0000 0011 - * +1 000 0000 0000 0100 - * *128K ... + * invert 000 0000 0000 0011 + * +1 000 0000 0000 0100 + * *128K ... */ low = (~low) & 0x1FFFC; *size = (low + 4) << (15 - PAGE_SHIFT); - return; } -static void amd_set_mtrr(unsigned int reg, unsigned long base, - unsigned long size, mtrr_type type) -/* [SUMMARY] Set variable MTRR register on the local CPU. - <reg> The register to set. - <base> The base address of the region. - <size> The size of the region. If this is 0 the region is disabled. - <type> The type of the region. - [RETURNS] Nothing. -*/ +/** + * amd_set_mtrr - Set variable MTRR register on the local CPU. + * + * @reg The register to set. + * @base The base address of the region. + * @size The size of the region. If this is 0 the region is disabled. + * @type The type of the region. + * + * Returns nothing. + */ +static void +amd_set_mtrr(unsigned int reg, unsigned long base, unsigned long size, mtrr_type type) { u32 regs[2]; /* - * Low is MTRR0 , High MTRR 1 + * Low is MTRR0, High MTRR 1 */ rdmsr(MSR_K6_UWCCR, regs[0], regs[1]); /* - * Blank to disable + * Blank to disable */ - if (size == 0) + if (size == 0) { regs[reg] = 0; - else - /* Set the register to the base, the type (off by one) and an - inverted bitmask of the size The size is the only odd - bit. We are fed say 512K We invert this and we get 111 1111 - 1111 1011 but if you subtract one and invert you get the - desired 111 1111 1111 1100 mask - - But ~(x - 1) == ~x + 1 == -x. Two's complement rocks! */ + } else { + /* + * Set the register to the base, the type (off by one) and an + * inverted bitmask of the size The size is the only odd + * bit. We are fed say 512K We invert this and we get 111 1111 + * 1111 1011 but if you subtract one and invert you get the + * desired 111 1111 1111 1100 mask + * + * But ~(x - 1) == ~x + 1 == -x. Two's complement rocks! + */ regs[reg] = (-size >> (15 - PAGE_SHIFT) & 0x0001FFFC) | (base << PAGE_SHIFT) | (type + 1); + } /* - * The writeback rule is quite specific. See the manual. Its - * disable local interrupts, write back the cache, set the mtrr + * The writeback rule is quite specific. See the manual. Its + * disable local interrupts, write back the cache, set the mtrr */ wbinvd(); wrmsr(MSR_K6_UWCCR, regs[0], regs[1]); } -static int amd_validate_add_page(unsigned long base, unsigned long size, unsigned int type) +static int +amd_validate_add_page(unsigned long base, unsigned long size, unsigned int type) { - /* Apply the K6 block alignment and size rules - In order - o Uncached or gathering only - o 128K or bigger block - o Power of 2 block - o base suitably aligned to the power - */ + /* + * Apply the K6 block alignment and size rules + * In order + * o Uncached or gathering only + * o 128K or bigger block + * o Power of 2 block + * o base suitably aligned to the power + */ if (type > MTRR_TYPE_WRCOMB || size < (1 << (17 - PAGE_SHIFT)) || (size & ~(size - 1)) - size || (base & (size - 1))) return -EINVAL; @@ -115,5 +122,3 @@ int __init amd_init_mtrr(void) set_mtrr_ops(&amd_mtrr_ops); return 0; } - -//arch_initcall(amd_mtrr_init); diff --git a/arch/x86/kernel/cpu/mtrr/centaur.c b/arch/x86/kernel/cpu/mtrr/centaur.c index cb9aa3a7a7a..de89f14eff3 100644 --- a/arch/x86/kernel/cpu/mtrr/centaur.c +++ b/arch/x86/kernel/cpu/mtrr/centaur.c @@ -1,7 +1,9 @@ #include <linux/init.h> #include <linux/mm.h> + #include <asm/mtrr.h> #include <asm/msr.h> + #include "mtrr.h" static struct { @@ -12,25 +14,25 @@ static struct { static u8 centaur_mcr_reserved; static u8 centaur_mcr_type; /* 0 for winchip, 1 for winchip2 */ -/* - * Report boot time MCR setups +/** + * centaur_get_free_region - Get a free MTRR. + * + * @base: The starting (base) address of the region. + * @size: The size (in bytes) of the region. + * + * Returns: the index of the region on success, else -1 on error. */ - static int centaur_get_free_region(unsigned long base, unsigned long size, int replace_reg) -/* [SUMMARY] Get a free MTRR. - <base> The starting (base) address of the region. - <size> The size (in bytes) of the region. - [RETURNS] The index of the region on success, else -1 on error. -*/ { - int i, max; - mtrr_type ltype; unsigned long lbase, lsize; + mtrr_type ltype; + int i, max; max = num_var_ranges; if (replace_reg >= 0 && replace_reg < max) return replace_reg; + for (i = 0; i < max; ++i) { if (centaur_mcr_reserved & (1 << i)) continue; @@ -38,11 +40,14 @@ centaur_get_free_region(unsigned long base, unsigned long size, int replace_reg) if (lsize == 0) return i; } + return -ENOSPC; } -void -mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) +/* + * Report boot time MCR setups + */ +void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) { centaur_mcr[mcr].low = lo; centaur_mcr[mcr].high = hi; @@ -54,33 +59,35 @@ centaur_get_mcr(unsigned int reg, unsigned long *base, { *base = centaur_mcr[reg].high >> PAGE_SHIFT; *size = -(centaur_mcr[reg].low & 0xfffff000) >> PAGE_SHIFT; - *type = MTRR_TYPE_WRCOMB; /* If it is there, it is write-combining */ + *type = MTRR_TYPE_WRCOMB; /* write-combining */ + if (centaur_mcr_type == 1 && ((centaur_mcr[reg].low & 31) & 2)) *type = MTRR_TYPE_UNCACHABLE; if (centaur_mcr_type == 1 && (centaur_mcr[reg].low & 31) == 25) *type = MTRR_TYPE_WRBACK; if (centaur_mcr_type == 0 && (centaur_mcr[reg].low & 31) == 31) *type = MTRR_TYPE_WRBACK; - } -static void centaur_set_mcr(unsigned int reg, unsigned long base, - unsigned long size, mtrr_type type) +static void +centaur_set_mcr(unsigned int reg, unsigned long base, + unsigned long size, mtrr_type type) { unsigned long low, high; if (size == 0) { - /* Disable */ + /* Disable */ high = low = 0; } else { high = base << PAGE_SHIFT; - if (centaur_mcr_type == 0) - low = -size << PAGE_SHIFT | 0x1f; /* only support write-combining... */ - else { + if (centaur_mcr_type == 0) { + /* Only support write-combining... */ + low = -size << PAGE_SHIFT | 0x1f; + } else { if (type == MTRR_TYPE_UNCACHABLE) - low = -size << PAGE_SHIFT | 0x02; /* NC */ + low = -size << PAGE_SHIFT | 0x02; /* NC */ else - low = -size << PAGE_SHIFT | 0x09; /* WWO,WC */ + low = -size << PAGE_SHIFT | 0x09; /* WWO, WC */ } } centaur_mcr[reg].high = high; @@ -88,118 +95,16 @@ static void centaur_set_mcr(unsigned int reg, unsigned long base, wrmsr(MSR_IDT_MCR0 + reg, low, high); } -#if 0 -/* - * Initialise the later (saner) Winchip MCR variant. In this version - * the BIOS can pass us the registers it has used (but not their values) - * and the control register is read/write - */ - -static void __init -centaur_mcr1_init(void) -{ - unsigned i; - u32 lo, hi; - - /* Unfortunately, MCR's are read-only, so there is no way to - * find out what the bios might have done. - */ - - rdmsr(MSR_IDT_MCR_CTRL, lo, hi); - if (((lo >> 17) & 7) == 1) { /* Type 1 Winchip2 MCR */ - lo &= ~0x1C0; /* clear key */ - lo |= 0x040; /* set key to 1 */ - wrmsr(MSR_IDT_MCR_CTRL, lo, hi); /* unlock MCR */ - } - - centaur_mcr_type = 1; - - /* - * Clear any unconfigured MCR's. - */ - - for (i = 0; i < 8; ++i) { - if (centaur_mcr[i].high == 0 && centaur_mcr[i].low == 0) { - if (!(lo & (1 << (9 + i)))) - wrmsr(MSR_IDT_MCR0 + i, 0, 0); - else - /* - * If the BIOS set up an MCR we cannot see it - * but we don't wish to obliterate it - */ - centaur_mcr_reserved |= (1 << i); - } - } - /* - * Throw the main write-combining switch... - * However if OOSTORE is enabled then people have already done far - * cleverer things and we should behave. - */ - - lo |= 15; /* Write combine enables */ - wrmsr(MSR_IDT_MCR_CTRL, lo, hi); -} - -/* - * Initialise the original winchip with read only MCR registers - * no used bitmask for the BIOS to pass on and write only control - */ - -static void __init -centaur_mcr0_init(void) -{ - unsigned i; - - /* Unfortunately, MCR's are read-only, so there is no way to - * find out what the bios might have done. - */ - - /* Clear any unconfigured MCR's. - * This way we are sure that the centaur_mcr array contains the actual - * values. The disadvantage is that any BIOS tweaks are thus undone. - * - */ - for (i = 0; i < 8; ++i) { - if (centaur_mcr[i].high == 0 && centaur_mcr[i].low == 0) - wrmsr(MSR_IDT_MCR0 + i, 0, 0); - } - - wrmsr(MSR_IDT_MCR_CTRL, 0x01F0001F, 0); /* Write only */ -} - -/* - * Initialise Winchip series MCR registers - */ - -static void __init -centaur_mcr_init(void) -{ - struct set_mtrr_context ctxt; - - set_mtrr_prepare_save(&ctxt); - set_mtrr_cache_disable(&ctxt); - - if (boot_cpu_data.x86_model == 4) - centaur_mcr0_init(); - else if (boot_cpu_data.x86_model == 8 || boot_cpu_data.x86_model == 9) - centaur_mcr1_init(); - - set_mtrr_done(&ctxt); -} -#endif - -static int centaur_validate_add_page(unsigned long base, - unsigned long size, unsigned int type) +static int +centaur_validate_add_page(unsigned long base, unsigned long size, unsigned int type) { /* - * FIXME: Winchip2 supports uncached + * FIXME: Winchip2 supports uncached */ - if (type != MTRR_TYPE_WRCOMB && + if (type != MTRR_TYPE_WRCOMB && (centaur_mcr_type == 0 || type != MTRR_TYPE_UNCACHABLE)) { - printk(KERN_WARNING - "mtrr: only write-combining%s supported\n", - centaur_mcr_type ? " and uncacheable are" - : " is"); + pr_warning("mtrr: only write-combining%s supported\n", + centaur_mcr_type ? " and uncacheable are" : " is"); return -EINVAL; } return 0; @@ -207,7 +112,6 @@ static int centaur_validate_add_page(unsigned long base, static struct mtrr_ops centaur_mtrr_ops = { .vendor = X86_VENDOR_CENTAUR, -// .init = centaur_mcr_init, .set = centaur_set_mcr, .get = centaur_get_mcr, .get_free_region = centaur_get_free_region, @@ -220,5 +124,3 @@ int __init centaur_init_mtrr(void) set_mtrr_ops(¢aur_mtrr_ops); return 0; } - -//arch_initcall(centaur_init_mtrr); diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c index 1d584a18a50..315738c74aa 100644 --- a/arch/x86/kernel/cpu/mtrr/cleanup.c +++ b/arch/x86/kernel/cpu/mtrr/cleanup.c @@ -1,51 +1,75 @@ -/* MTRR (Memory Type Range Register) cleanup - - Copyright (C) 2009 Yinghai Lu - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public - License as published by the Free Software Foundation; either - version 2 of the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with this library; if not, write to the Free - Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - +/* + * MTRR (Memory Type Range Register) cleanup + * + * Copyright (C) 2009 Yinghai Lu + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the Free + * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/smp.h> #include <linux/cpu.h> -#include <linux/mutex.h> #include <linux/sort.h> +#include <linux/mutex.h> +#include <linux/uaccess.h> +#include <linux/kvm_para.h> +#include <asm/processor.h> #include <asm/e820.h> #include <asm/mtrr.h> -#include <asm/uaccess.h> -#include <asm/processor.h> #include <asm/msr.h> -#include <asm/kvm_para.h> -#include "mtrr.h" -/* should be related to MTRR_VAR_RANGES nums */ -#define RANGE_NUM 256 +#include "mtrr.h" struct res_range { - unsigned long start; - unsigned long end; + unsigned long start; + unsigned long end; +}; + +struct var_mtrr_range_state { + unsigned long base_pfn; + unsigned long size_pfn; + mtrr_type type; +}; + +struct var_mtrr_state { + unsigned long range_startk; + unsigned long range_sizek; + unsigned long chunk_sizek; + unsigned long gran_sizek; + unsigned int reg; }; +/* Should be related to MTRR_VAR_RANGES nums */ +#define RANGE_NUM 256 + +static struct res_range __initdata range[RANGE_NUM]; +static int __initdata nr_range; + +static struct var_mtrr_range_state __initdata range_state[RANGE_NUM]; + +static int __initdata debug_print; +#define Dprintk(x...) do { if (debug_print) printk(KERN_DEBUG x); } while (0) + + static int __init -add_range(struct res_range *range, int nr_range, unsigned long start, - unsigned long end) +add_range(struct res_range *range, int nr_range, + unsigned long start, unsigned long end) { - /* out of slots */ + /* Out of slots: */ if (nr_range >= RANGE_NUM) return nr_range; @@ -58,12 +82,12 @@ add_range(struct res_range *range, int nr_range, unsigned long start, } static int __init -add_range_with_merge(struct res_range *range, int nr_range, unsigned long start, - unsigned long end) +add_range_with_merge(struct res_range *range, int nr_range, + unsigned long start, unsigned long end) { int i; - /* try to merge it with old one */ + /* Try to merge it with old one: */ for (i = 0; i < nr_range; i++) { unsigned long final_start, final_end; unsigned long common_start, common_end; @@ -84,7 +108,7 @@ add_range_with_merge(struct res_range *range, int nr_range, unsigned long start, return nr_range; } - /* need to add that */ + /* Need to add it: */ return add_range(range, nr_range, start, end); } @@ -117,7 +141,7 @@ subtract_range(struct res_range *range, unsigned long start, unsigned long end) } if (start > range[j].start && end < range[j].end) { - /* find the new spare */ + /* Find the new spare: */ for (i = 0; i < RANGE_NUM; i++) { if (range[i].end == 0) break; @@ -146,14 +170,8 @@ static int __init cmp_range(const void *x1, const void *x2) return start1 - start2; } -struct var_mtrr_range_state { - unsigned long base_pfn; - unsigned long size_pfn; - mtrr_type type; -}; - -static struct var_mtrr_range_state __initdata range_state[RANGE_NUM]; -static int __initdata debug_print; +#define BIOS_BUG_MSG KERN_WARNING \ + "WARNING: BIOS bug: VAR MTRR %d contains strange UC entry under 1M, check with your system vendor!\n" static int __init x86_get_mtrr_mem_range(struct res_range *range, int nr_range, @@ -180,7 +198,7 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range, range[i].start, range[i].end + 1); } - /* take out UC ranges */ + /* Take out UC ranges: */ for (i = 0; i < num_var_ranges; i++) { type = range_state[i].type; if (type != MTRR_TYPE_UNCACHABLE && @@ -193,9 +211,7 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range, if (base < (1<<(20-PAGE_SHIFT)) && mtrr_state.have_fixed && (mtrr_state.enabled & 1)) { /* Var MTRR contains UC entry below 1M? Skip it: */ - printk(KERN_WARNING "WARNING: BIOS bug: VAR MTRR %d " - "contains strange UC entry under 1M, check " - "with your system vendor!\n", i); + printk(BIOS_BUG_MSG, i); if (base + size <= (1<<(20-PAGE_SHIFT))) continue; size -= (1<<(20-PAGE_SHIFT)) - base; @@ -237,17 +253,13 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range, return nr_range; } -static struct res_range __initdata range[RANGE_NUM]; -static int __initdata nr_range; - #ifdef CONFIG_MTRR_SANITIZER static unsigned long __init sum_ranges(struct res_range *range, int nr_range) { - unsigned long sum; + unsigned long sum = 0; int i; - sum = 0; for (i = 0; i < nr_range; i++) sum += range[i].end + 1 - range[i].start; @@ -278,17 +290,9 @@ static int __init mtrr_cleanup_debug_setup(char *str) } early_param("mtrr_cleanup_debug", mtrr_cleanup_debug_setup); -struct var_mtrr_state { - unsigned long range_startk; - unsigned long range_sizek; - unsigned long chunk_sizek; - unsigned long gran_sizek; - unsigned int reg; -}; - static void __init set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek, - unsigned char type, unsigned int address_bits) + unsigned char type, unsigned int address_bits) { u32 base_lo, base_hi, mask_lo, mask_hi; u64 base, mask; @@ -301,7 +305,7 @@ set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek, mask = (1ULL << address_bits) - 1; mask &= ~((((u64)sizek) << 10) - 1); - base = ((u64)basek) << 10; + base = ((u64)basek) << 10; base |= type; mask |= 0x800; @@ -317,15 +321,14 @@ set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek, static void __init save_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek, - unsigned char type) + unsigned char type) { range_state[reg].base_pfn = basek >> (PAGE_SHIFT - 10); range_state[reg].size_pfn = sizek >> (PAGE_SHIFT - 10); range_state[reg].type = type; } -static void __init -set_var_mtrr_all(unsigned int address_bits) +static void __init set_var_mtrr_all(unsigned int address_bits) { unsigned long basek, sizek; unsigned char type; @@ -342,11 +345,11 @@ set_var_mtrr_all(unsigned int address_bits) static unsigned long to_size_factor(unsigned long sizek, char *factorp) { - char factor; unsigned long base = sizek; + char factor; if (base & ((1<<10) - 1)) { - /* not MB alignment */ + /* Not MB-aligned: */ factor = 'K'; } else if (base & ((1<<20) - 1)) { factor = 'M'; @@ -372,11 +375,12 @@ range_to_mtrr(unsigned int reg, unsigned long range_startk, unsigned long max_align, align; unsigned long sizek; - /* Compute the maximum size I can make a range */ + /* Compute the maximum size with which we can make a range: */ if (range_startk) max_align = ffs(range_startk) - 1; else max_align = 32; + align = fls(range_sizek) - 1; if (align > max_align) align = max_align; @@ -386,11 +390,10 @@ range_to_mtrr(unsigned int reg, unsigned long range_startk, char start_factor = 'K', size_factor = 'K'; unsigned long start_base, size_base; - start_base = to_size_factor(range_startk, - &start_factor), - size_base = to_size_factor(sizek, &size_factor), + start_base = to_size_factor(range_startk, &start_factor); + size_base = to_size_factor(sizek, &size_factor); - printk(KERN_DEBUG "Setting variable MTRR %d, " + Dprintk("Setting variable MTRR %d, " "base: %ld%cB, range: %ld%cB, type %s\n", reg, start_base, start_factor, size_base, size_factor, @@ -425,10 +428,11 @@ range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek, chunk_sizek = state->chunk_sizek; gran_sizek = state->gran_sizek; - /* align with gran size, prevent small block used up MTRRs */ + /* Align with gran size, prevent small block used up MTRRs: */ range_basek = ALIGN(state->range_startk, gran_sizek); if ((range_basek > basek) && basek) return second_sizek; + state->range_sizek -= (range_basek - state->range_startk); range_sizek = ALIGN(state->range_sizek, gran_sizek); @@ -439,22 +443,21 @@ range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek, } state->range_sizek = range_sizek; - /* try to append some small hole */ + /* Try to append some small hole: */ range0_basek = state->range_startk; range0_sizek = ALIGN(state->range_sizek, chunk_sizek); - /* no increase */ + /* No increase: */ if (range0_sizek == state->range_sizek) { - if (debug_print) - printk(KERN_DEBUG "rangeX: %016lx - %016lx\n", - range0_basek<<10, - (range0_basek + state->range_sizek)<<10); + Dprintk("rangeX: %016lx - %016lx\n", + range0_basek<<10, + (range0_basek + state->range_sizek)<<10); state->reg = range_to_mtrr(state->reg, range0_basek, state->range_sizek, MTRR_TYPE_WRBACK); return 0; } - /* only cut back, when it is not the last */ + /* Only cut back when it is not the last: */ if (sizek) { while (range0_basek + range0_sizek > (basek + sizek)) { if (range0_sizek >= chunk_sizek) @@ -470,16 +473,16 @@ range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek, second_try: range_basek = range0_basek + range0_sizek; - /* one hole in the middle */ + /* One hole in the middle: */ if (range_basek > basek && range_basek <= (basek + sizek)) second_sizek = range_basek - basek; if (range0_sizek > state->range_sizek) { - /* one hole in middle or at end */ + /* One hole in middle or at the end: */ hole_sizek = range0_sizek - state->range_sizek - second_sizek; - /* hole size should be less than half of range0 size */ + /* Hole size should be less than half of range0 size: */ if (hole_sizek >= (range0_sizek >> 1) && range0_sizek >= chunk_sizek) { range0_sizek -= chunk_sizek; @@ -491,32 +494,30 @@ second_try: } if (range0_sizek) { - if (debug_print) - printk(KERN_DEBUG "range0: %016lx - %016lx\n", - range0_basek<<10, - (range0_basek + range0_sizek)<<10); + Dprintk("range0: %016lx - %016lx\n", + range0_basek<<10, + (range0_basek + range0_sizek)<<10); state->reg = range_to_mtrr(state->reg, range0_basek, range0_sizek, MTRR_TYPE_WRBACK); } if (range0_sizek < state->range_sizek) { - /* need to handle left over */ + /* Need to handle left over range: */ range_sizek = state->range_sizek - range0_sizek; - if (debug_print) - printk(KERN_DEBUG "range: %016lx - %016lx\n", - range_basek<<10, - (range_basek + range_sizek)<<10); + Dprintk("range: %016lx - %016lx\n", + range_basek<<10, + (range_basek + range_sizek)<<10); + state->reg = range_to_mtrr(state->reg, range_basek, range_sizek, MTRR_TYPE_WRBACK); } if (hole_sizek) { hole_basek = range_basek - hole_sizek - second_sizek; - if (debug_print) - printk(KERN_DEBUG "hole: %016lx - %016lx\n", - hole_basek<<10, - (hole_basek + hole_sizek)<<10); + Dprintk("hole: %016lx - %016lx\n", + hole_basek<<10, + (hole_basek + hole_sizek)<<10); state->reg = range_to_mtrr(state->reg, hole_basek, hole_sizek, MTRR_TYPE_UNCACHABLE); } @@ -537,23 +538,23 @@ set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn, basek = base_pfn << (PAGE_SHIFT - 10); sizek = size_pfn << (PAGE_SHIFT - 10); - /* See if I can merge with the last range */ + /* See if I can merge with the last range: */ if ((basek <= 1024) || (state->range_startk + state->range_sizek == basek)) { unsigned long endk = basek + sizek; state->range_sizek = endk - state->range_startk; return; } - /* Write the range mtrrs */ + /* Write the range mtrrs: */ if (state->range_sizek != 0) second_sizek = range_to_mtrr_with_hole(state, basek, sizek); - /* Allocate an msr */ + /* Allocate an msr: */ state->range_startk = basek + second_sizek; state->range_sizek = sizek - second_sizek; } -/* mininum size of mtrr block that can take hole */ +/* Mininum size of mtrr block that can take hole: */ static u64 mtrr_chunk_size __initdata = (256ULL<<20); static int __init parse_mtrr_chunk_size_opt(char *p) @@ -565,7 +566,7 @@ static int __init parse_mtrr_chunk_size_opt(char *p) } early_param("mtrr_chunk_size", parse_mtrr_chunk_size_opt); -/* granity of mtrr of block */ +/* Granularity of mtrr of block: */ static u64 mtrr_gran_size __initdata; static int __init parse_mtrr_gran_size_opt(char *p) @@ -577,7 +578,7 @@ static int __init parse_mtrr_gran_size_opt(char *p) } early_param("mtrr_gran_size", parse_mtrr_gran_size_opt); -static int nr_mtrr_spare_reg __initdata = +static unsigned long nr_mtrr_spare_reg __initdata = CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT; static int __init parse_mtrr_spare_reg(char *arg) @@ -586,7 +587,6 @@ static int __init parse_mtrr_spare_reg(char *arg) nr_mtrr_spare_reg = simple_strtoul(arg, NULL, 0); return 0; } - early_param("mtrr_spare_reg_nr", parse_mtrr_spare_reg); static int __init @@ -594,8 +594,8 @@ x86_setup_var_mtrrs(struct res_range *range, int nr_range, u64 chunk_size, u64 gran_size) { struct var_mtrr_state var_state; - int i; int num_reg; + int i; var_state.range_startk = 0; var_state.range_sizek = 0; @@ -605,17 +605,18 @@ x86_setup_var_mtrrs(struct res_range *range, int nr_range, memset(range_state, 0, sizeof(range_state)); - /* Write the range etc */ - for (i = 0; i < nr_range; i++) + /* Write the range: */ + for (i = 0; i < nr_range; i++) { set_var_mtrr_range(&var_state, range[i].start, range[i].end - range[i].start + 1); + } - /* Write the last range */ + /* Write the last range: */ if (var_state.range_sizek != 0) range_to_mtrr_with_hole(&var_state, 0, 0); num_reg = var_state.reg; - /* Clear out the extra MTRR's */ + /* Clear out the extra MTRR's: */ while (var_state.reg < num_var_ranges) { save_var_mtrr(var_state.reg, 0, 0, 0); var_state.reg++; @@ -625,11 +626,11 @@ x86_setup_var_mtrrs(struct res_range *range, int nr_range, } struct mtrr_cleanup_result { - unsigned long gran_sizek; - unsigned long chunk_sizek; - unsigned long lose_cover_sizek; - unsigned int num_reg; - int bad; + unsigned long gran_sizek; + unsigned long chunk_sizek; + unsigned long lose_cover_sizek; + unsigned int num_reg; + int bad; }; /* @@ -645,10 +646,10 @@ static unsigned long __initdata min_loss_pfn[RANGE_NUM]; static void __init print_out_mtrr_range_state(void) { - int i; char start_factor = 'K', size_factor = 'K'; unsigned long start_base, size_base; mtrr_type type; + int i; for (i = 0; i < num_var_ranges; i++) { @@ -676,10 +677,10 @@ static int __init mtrr_need_cleanup(void) int i; mtrr_type type; unsigned long size; - /* extra one for all 0 */ + /* Extra one for all 0: */ int num[MTRR_NUM_TYPES + 1]; - /* check entries number */ + /* Check entries number: */ memset(num, 0, sizeof(num)); for (i = 0; i < num_var_ranges; i++) { type = range_state[i].type; @@ -693,88 +694,86 @@ static int __init mtrr_need_cleanup(void) num[type]++; } - /* check if we got UC entries */ + /* Check if we got UC entries: */ if (!num[MTRR_TYPE_UNCACHABLE]) return 0; - /* check if we only had WB and UC */ + /* Check if we only had WB and UC */ if (num[MTRR_TYPE_WRBACK] + num[MTRR_TYPE_UNCACHABLE] != - num_var_ranges - num[MTRR_NUM_TYPES]) + num_var_ranges - num[MTRR_NUM_TYPES]) return 0; return 1; } static unsigned long __initdata range_sums; -static void __init mtrr_calc_range_state(u64 chunk_size, u64 gran_size, - unsigned long extra_remove_base, - unsigned long extra_remove_size, - int i) + +static void __init +mtrr_calc_range_state(u64 chunk_size, u64 gran_size, + unsigned long x_remove_base, + unsigned long x_remove_size, int i) { - int num_reg; static struct res_range range_new[RANGE_NUM]; - static int nr_range_new; unsigned long range_sums_new; + static int nr_range_new; + int num_reg; - /* convert ranges to var ranges state */ - num_reg = x86_setup_var_mtrrs(range, nr_range, - chunk_size, gran_size); + /* Convert ranges to var ranges state: */ + num_reg = x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size); - /* we got new setting in range_state, check it */ + /* We got new setting in range_state, check it: */ memset(range_new, 0, sizeof(range_new)); nr_range_new = x86_get_mtrr_mem_range(range_new, 0, - extra_remove_base, extra_remove_size); + x_remove_base, x_remove_size); range_sums_new = sum_ranges(range_new, nr_range_new); result[i].chunk_sizek = chunk_size >> 10; result[i].gran_sizek = gran_size >> 10; result[i].num_reg = num_reg; + if (range_sums < range_sums_new) { - result[i].lose_cover_sizek = - (range_sums_new - range_sums) << PSHIFT; + result[i].lose_cover_sizek = (range_sums_new - range_sums) << PSHIFT; result[i].bad = 1; - } else - result[i].lose_cover_sizek = - (range_sums - range_sums_new) << PSHIFT; + } else { + result[i].lose_cover_sizek = (range_sums - range_sums_new) << PSHIFT; + } - /* double check it */ + /* Double check it: */ if (!result[i].bad && !result[i].lose_cover_sizek) { - if (nr_range_new != nr_range || - memcmp(range, range_new, sizeof(range))) - result[i].bad = 1; + if (nr_range_new != nr_range || memcmp(range, range_new, sizeof(range))) + result[i].bad = 1; } - if (!result[i].bad && (range_sums - range_sums_new < - min_loss_pfn[num_reg])) { - min_loss_pfn[num_reg] = - range_sums - range_sums_new; - } + if (!result[i].bad && (range_sums - range_sums_new < min_loss_pfn[num_reg])) + min_loss_pfn[num_reg] = range_sums - range_sums_new; } static void __init mtrr_print_out_one_result(int i) { - char gran_factor, chunk_factor, lose_factor; unsigned long gran_base, chunk_base, lose_base; + char gran_factor, chunk_factor, lose_factor; gran_base = to_size_factor(result[i].gran_sizek, &gran_factor), chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor), lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor), - printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t", - result[i].bad ? "*BAD*" : " ", - gran_base, gran_factor, chunk_base, chunk_factor); - printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n", - result[i].num_reg, result[i].bad ? "-" : "", - lose_base, lose_factor); + + pr_info("%sgran_size: %ld%c \tchunk_size: %ld%c \t", + result[i].bad ? "*BAD*" : " ", + gran_base, gran_factor, chunk_base, chunk_factor); + pr_cont("num_reg: %d \tlose cover RAM: %s%ld%c\n", + result[i].num_reg, result[i].bad ? "-" : "", + lose_base, lose_factor); } static int __init mtrr_search_optimal_index(void) { - int i; int num_reg_good; int index_good; + int i; if (nr_mtrr_spare_reg >= num_var_ranges) nr_mtrr_spare_reg = num_var_ranges - 1; + num_reg_good = -1; for (i = num_var_ranges - nr_mtrr_spare_reg; i > 0; i--) { if (!min_loss_pfn[i]) @@ -796,24 +795,24 @@ static int __init mtrr_search_optimal_index(void) return index_good; } - int __init mtrr_cleanup(unsigned address_bits) { - unsigned long extra_remove_base, extra_remove_size; + unsigned long x_remove_base, x_remove_size; unsigned long base, size, def, dummy; - mtrr_type type; u64 chunk_size, gran_size; + mtrr_type type; int index_good; int i; if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1) return 0; + rdmsr(MSR_MTRRdefType, def, dummy); def &= 0xff; if (def != MTRR_TYPE_UNCACHABLE) return 0; - /* get it and store it aside */ + /* Get it and store it aside: */ memset(range_state, 0, sizeof(range_state)); for (i = 0; i < num_var_ranges; i++) { mtrr_if->get(i, &base, &size, &type); @@ -822,29 +821,28 @@ int __init mtrr_cleanup(unsigned address_bits) range_state[i].type = type; } - /* check if we need handle it and can handle it */ + /* Check if we need handle it and can handle it: */ if (!mtrr_need_cleanup()) return 0; - /* print original var MTRRs at first, for debugging: */ + /* Print original var MTRRs at first, for debugging: */ printk(KERN_DEBUG "original variable MTRRs\n"); print_out_mtrr_range_state(); memset(range, 0, sizeof(range)); - extra_remove_size = 0; - extra_remove_base = 1 << (32 - PAGE_SHIFT); + x_remove_size = 0; + x_remove_base = 1 << (32 - PAGE_SHIFT); if (mtrr_tom2) - extra_remove_size = - (mtrr_tom2 >> PAGE_SHIFT) - extra_remove_base; - nr_range = x86_get_mtrr_mem_range(range, 0, extra_remove_base, - extra_remove_size); + x_remove_size = (mtrr_tom2 >> PAGE_SHIFT) - x_remove_base; + + nr_range = x86_get_mtrr_mem_range(range, 0, x_remove_base, x_remove_size); /* - * [0, 1M) should always be coverred by var mtrr with WB - * and fixed mtrrs should take effective before var mtrr for it + * [0, 1M) should always be covered by var mtrr with WB + * and fixed mtrrs should take effect before var mtrr for it: */ nr_range = add_range_with_merge(range, nr_range, 0, (1ULL<<(20 - PAGE_SHIFT)) - 1); - /* sort the ranges */ + /* Sort the ranges: */ sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL); range_sums = sum_ranges(range, nr_range); @@ -854,7 +852,7 @@ int __init mtrr_cleanup(unsigned address_bits) if (mtrr_chunk_size && mtrr_gran_size) { i = 0; mtrr_calc_range_state(mtrr_chunk_size, mtrr_gran_size, - extra_remove_base, extra_remove_size, i); + x_remove_base, x_remove_size, i); mtrr_print_out_one_result(i); @@ -880,7 +878,7 @@ int __init mtrr_cleanup(unsigned address_bits) continue; mtrr_calc_range_state(chunk_size, gran_size, - extra_remove_base, extra_remove_size, i); + x_remove_base, x_remove_size, i); if (debug_print) { mtrr_print_out_one_result(i); printk(KERN_INFO "\n"); @@ -890,7 +888,7 @@ int __init mtrr_cleanup(unsigned address_bits) } } - /* try to find the optimal index */ + /* Try to find the optimal index: */ index_good = mtrr_search_optimal_index(); if (index_good != -1) { @@ -898,7 +896,7 @@ int __init mtrr_cleanup(unsigned address_bits) i = index_good; mtrr_print_out_one_result(i); - /* convert ranges to var ranges state */ + /* Convert ranges to var ranges state: */ chunk_size = result[i].chunk_sizek; chunk_size <<= 10; gran_size = result[i].gran_sizek; @@ -941,8 +939,8 @@ early_param("disable_mtrr_trim", disable_mtrr_trim_setup); * Note this won't check if the MTRRs < 4GB where the magic bit doesn't * apply to are wrong, but so far we don't know of any such case in the wild. */ -#define Tom2Enabled (1U << 21) -#define Tom2ForceMemTypeWB (1U << 22) +#define Tom2Enabled (1U << 21) +#define Tom2ForceMemTypeWB (1U << 22) int __init amd_special_default_mtrr(void) { @@ -952,7 +950,7 @@ int __init amd_special_default_mtrr(void) return 0; if (boot_cpu_data.x86 < 0xf || boot_cpu_data.x86 > 0x11) return 0; - /* In case some hypervisor doesn't pass SYSCFG through */ + /* In case some hypervisor doesn't pass SYSCFG through: */ if (rdmsr_safe(MSR_K8_SYSCFG, &l, &h) < 0) return 0; /* @@ -965,19 +963,21 @@ int __init amd_special_default_mtrr(void) return 0; } -static u64 __init real_trim_memory(unsigned long start_pfn, - unsigned long limit_pfn) +static u64 __init +real_trim_memory(unsigned long start_pfn, unsigned long limit_pfn) { u64 trim_start, trim_size; + trim_start = start_pfn; trim_start <<= PAGE_SHIFT; + trim_size = limit_pfn; trim_size <<= PAGE_SHIFT; trim_size -= trim_start; - return e820_update_range(trim_start, trim_size, E820_RAM, - E820_RESERVED); + return e820_update_range(trim_start, trim_size, E820_RAM, E820_RESERVED); } + /** * mtrr_trim_uncached_memory - trim RAM not covered by MTRRs * @end_pfn: ending page frame number @@ -985,7 +985,7 @@ static u64 __init real_trim_memory(unsigned long start_pfn, * Some buggy BIOSes don't setup the MTRRs properly for systems with certain * memory configurations. This routine checks that the highest MTRR matches * the end of memory, to make sure the MTRRs having a write back type cover - * all of the memory the kernel is intending to use. If not, it'll trim any + * all of the memory the kernel is intending to use. If not, it'll trim any * memory off the end by adjusting end_pfn, removing it from the kernel's * allocation pools, warning the user with an obnoxious message. */ @@ -994,21 +994,22 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn) unsigned long i, base, size, highest_pfn = 0, def, dummy; mtrr_type type; u64 total_trim_size; - /* extra one for all 0 */ int num[MTRR_NUM_TYPES + 1]; + /* * Make sure we only trim uncachable memory on machines that * support the Intel MTRR architecture: */ if (!is_cpu(INTEL) || disable_mtrr_trim) return 0; + rdmsr(MSR_MTRRdefType, def, dummy); def &= 0xff; if (def != MTRR_TYPE_UNCACHABLE) return 0; - /* get it and store it aside */ + /* Get it and store it aside: */ memset(range_state, 0, sizeof(range_state)); for (i = 0; i < num_var_ranges; i++) { mtrr_if->get(i, &base, &size, &type); @@ -1017,7 +1018,7 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn) range_state[i].type = type; } - /* Find highest cached pfn */ + /* Find highest cached pfn: */ for (i = 0; i < num_var_ranges; i++) { type = range_state[i].type; if (type != MTRR_TYPE_WRBACK) @@ -1028,13 +1029,13 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn) highest_pfn = base + size; } - /* kvm/qemu doesn't have mtrr set right, don't trim them all */ + /* kvm/qemu doesn't have mtrr set right, don't trim them all: */ if (!highest_pfn) { printk(KERN_INFO "CPU MTRRs all blank - virtualized system.\n"); return 0; } - /* check entries number */ + /* Check entries number: */ memset(num, 0, sizeof(num)); for (i = 0; i < num_var_ranges; i++) { type = range_state[i].type; @@ -1046,11 +1047,11 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn) num[type]++; } - /* no entry for WB? */ + /* No entry for WB? */ if (!num[MTRR_TYPE_WRBACK]) return 0; - /* check if we only had WB and UC */ + /* Check if we only had WB and UC: */ if (num[MTRR_TYPE_WRBACK] + num[MTRR_TYPE_UNCACHABLE] != num_var_ranges - num[MTRR_NUM_TYPES]) return 0; @@ -1066,31 +1067,31 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn) } nr_range = x86_get_mtrr_mem_range(range, nr_range, 0, 0); + /* Check the head: */ total_trim_size = 0; - /* check the head */ if (range[0].start) total_trim_size += real_trim_memory(0, range[0].start); - /* check the holes */ + + /* Check the holes: */ for (i = 0; i < nr_range - 1; i++) { if (range[i].end + 1 < range[i+1].start) total_trim_size += real_trim_memory(range[i].end + 1, range[i+1].start); } - /* check the top */ + + /* Check the top: */ i = nr_range - 1; if (range[i].end + 1 < end_pfn) total_trim_size += real_trim_memory(range[i].end + 1, end_pfn); if (total_trim_size) { - printk(KERN_WARNING "WARNING: BIOS bug: CPU MTRRs don't cover" - " all of memory, losing %lluMB of RAM.\n", - total_trim_size >> 20); + pr_warning("WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing %lluMB of RAM.\n", total_trim_size >> 20); if (!changed_by_mtrr_cleanup) WARN_ON(1); - printk(KERN_INFO "update e820 for mtrr\n"); + pr_info("update e820 for mtrr\n"); update_e820(); return 1; @@ -1098,4 +1099,3 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn) return 0; } - diff --git a/arch/x86/kernel/cpu/mtrr/cyrix.c b/arch/x86/kernel/cpu/mtrr/cyrix.c index ff14c320040..228d982ce09 100644 --- a/arch/x86/kernel/cpu/mtrr/cyrix.c +++ b/arch/x86/kernel/cpu/mtrr/cyrix.c @@ -1,38 +1,40 @@ #include <linux/init.h> +#include <linux/io.h> #include <linux/mm.h> -#include <asm/mtrr.h> -#include <asm/msr.h> -#include <asm/io.h> + #include <asm/processor-cyrix.h> #include <asm/processor-flags.h> +#include <asm/mtrr.h> +#include <asm/msr.h> + #include "mtrr.h" static void cyrix_get_arr(unsigned int reg, unsigned long *base, unsigned long *size, mtrr_type * type) { - unsigned long flags; unsigned char arr, ccr3, rcr, shift; + unsigned long flags; arr = CX86_ARR_BASE + (reg << 1) + reg; /* avoid multiplication by 3 */ - /* Save flags and disable interrupts */ local_irq_save(flags); ccr3 = getCx86(CX86_CCR3); setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); /* enable MAPEN */ - ((unsigned char *) base)[3] = getCx86(arr); - ((unsigned char *) base)[2] = getCx86(arr + 1); - ((unsigned char *) base)[1] = getCx86(arr + 2); + ((unsigned char *)base)[3] = getCx86(arr); + ((unsigned char *)base)[2] = getCx86(arr + 1); + ((unsigned char *)base)[1] = getCx86(arr + 2); rcr = getCx86(CX86_RCR_BASE + reg); - setCx86(CX86_CCR3, ccr3); /* disable MAPEN */ + setCx86(CX86_CCR3, ccr3); /* disable MAPEN */ - /* Enable interrupts if it was enabled previously */ local_irq_restore(flags); + shift = ((unsigned char *) base)[1] & 0x0f; *base >>= PAGE_SHIFT; - /* Power of two, at least 4K on ARR0-ARR6, 256K on ARR7 + /* + * Power of two, at least 4K on ARR0-ARR6, 256K on ARR7 * Note: shift==0xf means 4G, this is unsupported. */ if (shift) @@ -76,17 +78,20 @@ cyrix_get_arr(unsigned int reg, unsigned long *base, } } +/* + * cyrix_get_free_region - get a free ARR. + * + * @base: the starting (base) address of the region. + * @size: the size (in bytes) of the region. + * + * Returns: the index of the region on success, else -1 on error. +*/ static int cyrix_get_free_region(unsigned long base, unsigned long size, int replace_reg) -/* [SUMMARY] Get a free ARR. - <base> The starting (base) address of the region. - <size> The size (in bytes) of the region. - [RETURNS] The index of the region on success, else -1 on error. -*/ { - int i; - mtrr_type ltype; unsigned long lbase, lsize; + mtrr_type ltype; + int i; switch (replace_reg) { case 7: @@ -107,14 +112,17 @@ cyrix_get_free_region(unsigned long base, unsigned long size, int replace_reg) cyrix_get_arr(7, &lbase, &lsize, <ype); if (lsize == 0) return 7; - /* Else try ARR0-ARR6 first */ + /* Else try ARR0-ARR6 first */ } else { for (i = 0; i < 7; i++) { cyrix_get_arr(i, &lbase, &lsize, <ype); if (lsize == 0) return i; } - /* ARR0-ARR6 isn't free, try ARR7 but its size must be at least 256K */ + /* + * ARR0-ARR6 isn't free + * try ARR7 but its size must be at least 256K + */ cyrix_get_arr(i, &lbase, &lsize, <ype); if ((lsize == 0) && (size >= 0x40)) return i; @@ -122,21 +130,22 @@ cyrix_get_free_region(unsigned long base, unsigned long size, int replace_reg) return -ENOSPC; } -static u32 cr4 = 0; -static u32 ccr3; +static u32 cr4, ccr3; static void prepare_set(void) { u32 cr0; /* Save value of CR4 and clear Page Global Enable (bit 7) */ - if ( cpu_has_pge ) { + if (cpu_has_pge) { cr4 = read_cr4(); write_cr4(cr4 & ~X86_CR4_PGE); } - /* Disable and flush caches. Note that wbinvd flushes the TLBs as - a side-effect */ + /* + * Disable and flush caches. + * Note that wbinvd flushes the TLBs as a side-effect + */ cr0 = read_cr0() | X86_CR0_CD; wbinvd(); write_cr0(cr0); @@ -147,22 +156,21 @@ static void prepare_set(void) /* Cyrix ARRs - everything else was excluded at the top */ setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10); - } static void post_set(void) { - /* Flush caches and TLBs */ + /* Flush caches and TLBs */ wbinvd(); /* Cyrix ARRs - everything else was excluded at the top */ setCx86(CX86_CCR3, ccr3); - - /* Enable caches */ + + /* Enable caches */ write_cr0(read_cr0() & 0xbfffffff); - /* Restore value of CR4 */ - if ( cpu_has_pge ) + /* Restore value of CR4 */ + if (cpu_has_pge) write_cr4(cr4); } @@ -178,7 +186,8 @@ static void cyrix_set_arr(unsigned int reg, unsigned long base, size >>= 6; size &= 0x7fff; /* make sure arr_size <= 14 */ - for (arr_size = 0; size; arr_size++, size >>= 1) ; + for (arr_size = 0; size; arr_size++, size >>= 1) + ; if (reg < 7) { switch (type) { @@ -215,18 +224,18 @@ static void cyrix_set_arr(unsigned int reg, unsigned long base, prepare_set(); base <<= PAGE_SHIFT; - setCx86(arr, ((unsigned char *) &base)[3]); - setCx86(arr + 1, ((unsigned char *) &base)[2]); - setCx86(arr + 2, (((unsigned char *) &base)[1]) | arr_size); + setCx86(arr + 0, ((unsigned char *)&base)[3]); + setCx86(arr + 1, ((unsigned char *)&base)[2]); + setCx86(arr + 2, (((unsigned char *)&base)[1]) | arr_size); setCx86(CX86_RCR_BASE + reg, arr_type); post_set(); } typedef struct { - unsigned long base; - unsigned long size; - mtrr_type type; + unsigned long base; + unsigned long size; + mtrr_type type; } arr_state_t; static arr_state_t arr_state[8] = { @@ -247,16 +256,17 @@ static void cyrix_set_all(void) setCx86(CX86_CCR0 + i, ccr_state[i]); for (; i < 7; i++) setCx86(CX86_CCR4 + i, ccr_state[i]); - for (i = 0; i < 8; i++) - cyrix_set_arr(i, arr_state[i].base, + + for (i = 0; i < 8; i++) { + cyrix_set_arr(i, arr_state[i].base, arr_state[i].size, arr_state[i].type); + } post_set(); } static struct mtrr_ops cyrix_mtrr_ops = { .vendor = X86_VENDOR_CYRIX, -// .init = cyrix_arr_init, .set_all = cyrix_set_all, .set = cyrix_set_arr, .get = cyrix_get_arr, @@ -270,5 +280,3 @@ int __init cyrix_init_mtrr(void) set_mtrr_ops(&cyrix_mtrr_ops); return 0; } - -//arch_initcall(cyrix_init_mtrr); diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c index 0543f69f0b2..55da0c5f68d 100644 --- a/arch/x86/kernel/cpu/mtrr/generic.c +++ b/arch/x86/kernel/cpu/mtrr/generic.c @@ -1,28 +1,34 @@ -/* This only handles 32bit MTRR on 32bit hosts. This is strictly wrong - because MTRRs can span upto 40 bits (36bits on most modern x86) */ +/* + * This only handles 32bit MTRR on 32bit hosts. This is strictly wrong + * because MTRRs can span upto 40 bits (36bits on most modern x86) + */ +#define DEBUG + +#include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> +#include <linux/io.h> #include <linux/mm.h> -#include <linux/module.h> -#include <asm/io.h> -#include <asm/mtrr.h> -#include <asm/msr.h> -#include <asm/system.h> -#include <asm/cpufeature.h> + #include <asm/processor-flags.h> +#include <asm/cpufeature.h> #include <asm/tlbflush.h> +#include <asm/system.h> +#include <asm/mtrr.h> +#include <asm/msr.h> #include <asm/pat.h> + #include "mtrr.h" struct fixed_range_block { - int base_msr; /* start address of an MTRR block */ - int ranges; /* number of MTRRs in this block */ + int base_msr; /* start address of an MTRR block */ + int ranges; /* number of MTRRs in this block */ }; static struct fixed_range_block fixed_range_blocks[] = { - { MSR_MTRRfix64K_00000, 1 }, /* one 64k MTRR */ - { MSR_MTRRfix16K_80000, 2 }, /* two 16k MTRRs */ - { MSR_MTRRfix4K_C0000, 8 }, /* eight 4k MTRRs */ + { MSR_MTRRfix64K_00000, 1 }, /* one 64k MTRR */ + { MSR_MTRRfix16K_80000, 2 }, /* two 16k MTRRs */ + { MSR_MTRRfix4K_C0000, 8 }, /* eight 4k MTRRs */ {} }; @@ -30,10 +36,10 @@ static unsigned long smp_changes_mask; static int mtrr_state_set; u64 mtrr_tom2; -struct mtrr_state_type mtrr_state = {}; +struct mtrr_state_type mtrr_state; EXPORT_SYMBOL_GPL(mtrr_state); -/** +/* * BIOS is expected to clear MtrrFixDramModEn bit, see for example * "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD * Opteron Processors" (26094 Rev. 3.30 February 2006), section @@ -104,9 +110,8 @@ u8 mtrr_type_lookup(u64 start, u64 end) * Look of multiple ranges matching this address and pick type * as per MTRR precedence */ - if (!(mtrr_state.enabled & 2)) { + if (!(mtrr_state.enabled & 2)) return mtrr_state.def_type; - } prev_match = 0xFF; for (i = 0; i < num_var_ranges; ++i) { @@ -125,9 +130,8 @@ u8 mtrr_type_lookup(u64 start, u64 end) if (start_state != end_state) return 0xFE; - if ((start & mask) != (base & mask)) { + if ((start & mask) != (base & mask)) continue; - } curr_match = mtrr_state.var_ranges[i].base_lo & 0xff; if (prev_match == 0xFF) { @@ -148,9 +152,8 @@ u8 mtrr_type_lookup(u64 start, u64 end) curr_match = MTRR_TYPE_WRTHROUGH; } - if (prev_match != curr_match) { + if (prev_match != curr_match) return MTRR_TYPE_UNCACHABLE; - } } if (mtrr_tom2) { @@ -164,7 +167,7 @@ u8 mtrr_type_lookup(u64 start, u64 end) return mtrr_state.def_type; } -/* Get the MSR pair relating to a var range */ +/* Get the MSR pair relating to a var range */ static void get_mtrr_var_range(unsigned int index, struct mtrr_var_range *vr) { @@ -172,7 +175,7 @@ get_mtrr_var_range(unsigned int index, struct mtrr_var_range *vr) rdmsr(MTRRphysMask_MSR(index), vr->mask_lo, vr->mask_hi); } -/* fill the MSR pair relating to a var range */ +/* Fill the MSR pair relating to a var range */ void fill_mtrr_var_range(unsigned int index, u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi) { @@ -186,10 +189,9 @@ void fill_mtrr_var_range(unsigned int index, vr[index].mask_hi = mask_hi; } -static void -get_fixed_ranges(mtrr_type * frs) +static void get_fixed_ranges(mtrr_type *frs) { - unsigned int *p = (unsigned int *) frs; + unsigned int *p = (unsigned int *)frs; int i; k8_check_syscfg_dram_mod_en(); @@ -217,22 +219,22 @@ static void __init print_fixed_last(void) if (!last_fixed_end) return; - printk(KERN_DEBUG " %05X-%05X %s\n", last_fixed_start, - last_fixed_end - 1, mtrr_attrib_to_str(last_fixed_type)); + pr_debug(" %05X-%05X %s\n", last_fixed_start, + last_fixed_end - 1, mtrr_attrib_to_str(last_fixed_type)); last_fixed_end = 0; } static void __init update_fixed_last(unsigned base, unsigned end, - mtrr_type type) + mtrr_type type) { last_fixed_start = base; last_fixed_end = end; last_fixed_type = type; } -static void __init print_fixed(unsigned base, unsigned step, - const mtrr_type *types) +static void __init +print_fixed(unsigned base, unsigned step, const mtrr_type *types) { unsigned i; @@ -259,54 +261,55 @@ static void __init print_mtrr_state(void) unsigned int i; int high_width; - printk(KERN_DEBUG "MTRR default type: %s\n", - mtrr_attrib_to_str(mtrr_state.def_type)); + pr_debug("MTRR default type: %s\n", + mtrr_attrib_to_str(mtrr_state.def_type)); if (mtrr_state.have_fixed) { - printk(KERN_DEBUG "MTRR fixed ranges %sabled:\n", - mtrr_state.enabled & 1 ? "en" : "dis"); + pr_debug("MTRR fixed ranges %sabled:\n", + mtrr_state.enabled & 1 ? "en" : "dis"); print_fixed(0x00000, 0x10000, mtrr_state.fixed_ranges + 0); for (i = 0; i < 2; ++i) - print_fixed(0x80000 + i * 0x20000, 0x04000, mtrr_state.fixed_ranges + (i + 1) * 8); + print_fixed(0x80000 + i * 0x20000, 0x04000, + mtrr_state.fixed_ranges + (i + 1) * 8); for (i = 0; i < 8; ++i) - print_fixed(0xC0000 + i * 0x08000, 0x01000, mtrr_state.fixed_ranges + (i + 3) * 8); + print_fixed(0xC0000 + i * 0x08000, 0x01000, + mtrr_state.fixed_ranges + (i + 3) * 8); /* tail */ print_fixed_last(); } - printk(KERN_DEBUG "MTRR variable ranges %sabled:\n", - mtrr_state.enabled & 2 ? "en" : "dis"); + pr_debug("MTRR variable ranges %sabled:\n", + mtrr_state.enabled & 2 ? "en" : "dis"); if (size_or_mask & 0xffffffffUL) high_width = ffs(size_or_mask & 0xffffffffUL) - 1; else high_width = ffs(size_or_mask>>32) + 32 - 1; high_width = (high_width - (32 - PAGE_SHIFT) + 3) / 4; + for (i = 0; i < num_var_ranges; ++i) { if (mtrr_state.var_ranges[i].mask_lo & (1 << 11)) - printk(KERN_DEBUG " %u base %0*X%05X000 mask %0*X%05X000 %s\n", - i, - high_width, - mtrr_state.var_ranges[i].base_hi, - mtrr_state.var_ranges[i].base_lo >> 12, - high_width, - mtrr_state.var_ranges[i].mask_hi, - mtrr_state.var_ranges[i].mask_lo >> 12, - mtrr_attrib_to_str(mtrr_state.var_ranges[i].base_lo & 0xff)); + pr_debug(" %u base %0*X%05X000 mask %0*X%05X000 %s\n", + i, + high_width, + mtrr_state.var_ranges[i].base_hi, + mtrr_state.var_ranges[i].base_lo >> 12, + high_width, + mtrr_state.var_ranges[i].mask_hi, + mtrr_state.var_ranges[i].mask_lo >> 12, + mtrr_attrib_to_str(mtrr_state.var_ranges[i].base_lo & 0xff)); else - printk(KERN_DEBUG " %u disabled\n", i); - } - if (mtrr_tom2) { - printk(KERN_DEBUG "TOM2: %016llx aka %lldM\n", - mtrr_tom2, mtrr_tom2>>20); + pr_debug(" %u disabled\n", i); } + if (mtrr_tom2) + pr_debug("TOM2: %016llx aka %lldM\n", mtrr_tom2, mtrr_tom2>>20); } -/* Grab all of the MTRR state for this CPU into *state */ +/* Grab all of the MTRR state for this CPU into *state */ void __init get_mtrr_state(void) { - unsigned int i; struct mtrr_var_range *vrs; - unsigned lo, dummy; unsigned long flags; + unsigned lo, dummy; + unsigned int i; vrs = mtrr_state.var_ranges; @@ -324,6 +327,7 @@ void __init get_mtrr_state(void) if (amd_special_default_mtrr()) { unsigned low, high; + /* TOP_MEM2 */ rdmsr(MSR_K8_TOP_MEM2, low, high); mtrr_tom2 = high; @@ -344,10 +348,9 @@ void __init get_mtrr_state(void) post_set(); local_irq_restore(flags); - } -/* Some BIOS's are fucked and don't set all MTRRs the same! */ +/* Some BIOS's are messed up and don't set all MTRRs the same! */ void __init mtrr_state_warn(void) { unsigned long mask = smp_changes_mask; @@ -355,28 +358,33 @@ void __init mtrr_state_warn(void) if (!mask) return; if (mask & MTRR_CHANGE_MASK_FIXED) - printk(KERN_WARNING "mtrr: your CPUs had inconsistent fixed MTRR settings\n"); + pr_warning("mtrr: your CPUs had inconsistent fixed MTRR settings\n"); if (mask & MTRR_CHANGE_MASK_VARIABLE) - printk(KERN_WARNING "mtrr: your CPUs had inconsistent variable MTRR settings\n"); + pr_warning("mtrr: your CPUs had inconsistent variable MTRR settings\n"); if (mask & MTRR_CHANGE_MASK_DEFTYPE) - printk(KERN_WARNING "mtrr: your CPUs had inconsistent MTRRdefType settings\n"); + pr_warning("mtrr: your CPUs had inconsistent MTRRdefType settings\n"); + printk(KERN_INFO "mtrr: probably your BIOS does not setup all CPUs.\n"); printk(KERN_INFO "mtrr: corrected configuration.\n"); } -/* Doesn't attempt to pass an error out to MTRR users - because it's quite complicated in some cases and probably not - worth it because the best error handling is to ignore it. */ +/* + * Doesn't attempt to pass an error out to MTRR users + * because it's quite complicated in some cases and probably not + * worth it because the best error handling is to ignore it. + */ void mtrr_wrmsr(unsigned msr, unsigned a, unsigned b) { - if (wrmsr_safe(msr, a, b) < 0) + if (wrmsr_safe(msr, a, b) < 0) { printk(KERN_ERR "MTRR: CPU %u: Writing MSR %x to %x:%x failed\n", smp_processor_id(), msr, a, b); + } } /** - * set_fixed_range - checks & updates a fixed-range MTRR if it differs from the value it should have + * set_fixed_range - checks & updates a fixed-range MTRR if it + * differs from the value it should have * @msr: MSR address of the MTTR which should be checked and updated * @changed: pointer which indicates whether the MTRR needed to be changed * @msrwords: pointer to the MSR values which the MSR should have @@ -401,20 +409,23 @@ static void set_fixed_range(int msr, bool *changed, unsigned int *msrwords) * * Returns: The index of the region on success, else negative on error. */ -int generic_get_free_region(unsigned long base, unsigned long size, int replace_reg) +int +generic_get_free_region(unsigned long base, unsigned long size, int replace_reg) { - int i, max; - mtrr_type ltype; unsigned long lbase, lsize; + mtrr_type ltype; + int i, max; max = num_var_ranges; if (replace_reg >= 0 && replace_reg < max) return replace_reg; + for (i = 0; i < max; ++i) { mtrr_if->get(i, &lbase, &lsize, <ype); if (lsize == 0) return i; } + return -ENOSPC; } @@ -434,7 +445,7 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base, rdmsr(MTRRphysMask_MSR(reg), mask_lo, mask_hi); if ((mask_lo & 0x800) == 0) { - /* Invalid (i.e. free) range */ + /* Invalid (i.e. free) range */ *base = 0; *size = 0; *type = 0; @@ -471,27 +482,31 @@ out_put_cpu: } /** - * set_fixed_ranges - checks & updates the fixed-range MTRRs if they differ from the saved set + * set_fixed_ranges - checks & updates the fixed-range MTRRs if they + * differ from the saved set * @frs: pointer to fixed-range MTRR values, saved by get_fixed_ranges() */ -static int set_fixed_ranges(mtrr_type * frs) +static int set_fixed_ranges(mtrr_type *frs) { - unsigned long long *saved = (unsigned long long *) frs; + unsigned long long *saved = (unsigned long long *)frs; bool changed = false; - int block=-1, range; + int block = -1, range; k8_check_syscfg_dram_mod_en(); - while (fixed_range_blocks[++block].ranges) - for (range=0; range < fixed_range_blocks[block].ranges; range++) - set_fixed_range(fixed_range_blocks[block].base_msr + range, - &changed, (unsigned int *) saved++); + while (fixed_range_blocks[++block].ranges) { + for (range = 0; range < fixed_range_blocks[block].ranges; range++) + set_fixed_range(fixed_range_blocks[block].base_msr + range, + &changed, (unsigned int *)saved++); + } return changed; } -/* Set the MSR pair relating to a var range. Returns TRUE if - changes are made */ +/* + * Set the MSR pair relating to a var range. + * Returns true if changes are made. + */ static bool set_mtrr_var_ranges(unsigned int index, struct mtrr_var_range *vr) { unsigned int lo, hi; @@ -501,6 +516,7 @@ static bool set_mtrr_var_ranges(unsigned int index, struct mtrr_var_range *vr) if ((vr->base_lo & 0xfffff0ffUL) != (lo & 0xfffff0ffUL) || (vr->base_hi & (size_and_mask >> (32 - PAGE_SHIFT))) != (hi & (size_and_mask >> (32 - PAGE_SHIFT)))) { + mtrr_wrmsr(MTRRphysBase_MSR(index), vr->base_lo, vr->base_hi); changed = true; } @@ -526,21 +542,26 @@ static u32 deftype_lo, deftype_hi; */ static unsigned long set_mtrr_state(void) { - unsigned int i; unsigned long change_mask = 0; + unsigned int i; - for (i = 0; i < num_var_ranges; i++) + for (i = 0; i < num_var_ranges; i++) { if (set_mtrr_var_ranges(i, &mtrr_state.var_ranges[i])) change_mask |= MTRR_CHANGE_MASK_VARIABLE; + } if (mtrr_state.have_fixed && set_fixed_ranges(mtrr_state.fixed_ranges)) change_mask |= MTRR_CHANGE_MASK_FIXED; - /* Set_mtrr_restore restores the old value of MTRRdefType, - so to set it we fiddle with the saved value */ + /* + * Set_mtrr_restore restores the old value of MTRRdefType, + * so to set it we fiddle with the saved value: + */ if ((deftype_lo & 0xff) != mtrr_state.def_type || ((deftype_lo & 0xc00) >> 10) != mtrr_state.enabled) { - deftype_lo = (deftype_lo & ~0xcff) | mtrr_state.def_type | (mtrr_state.enabled << 10); + + deftype_lo = (deftype_lo & ~0xcff) | mtrr_state.def_type | + (mtrr_state.enabled << 10); change_mask |= MTRR_CHANGE_MASK_DEFTYPE; } @@ -548,33 +569,36 @@ static unsigned long set_mtrr_state(void) } -static unsigned long cr4 = 0; +static unsigned long cr4; static DEFINE_SPINLOCK(set_atomicity_lock); /* - * Since we are disabling the cache don't allow any interrupts - they - * would run extremely slow and would only increase the pain. The caller must - * ensure that local interrupts are disabled and are reenabled after post_set() - * has been called. + * Since we are disabling the cache don't allow any interrupts, + * they would run extremely slow and would only increase the pain. + * + * The caller must ensure that local interrupts are disabled and + * are reenabled after post_set() has been called. */ - static void prepare_set(void) __acquires(set_atomicity_lock) { unsigned long cr0; - /* Note that this is not ideal, since the cache is only flushed/disabled - for this CPU while the MTRRs are changed, but changing this requires - more invasive changes to the way the kernel boots */ + /* + * Note that this is not ideal + * since the cache is only flushed/disabled for this CPU while the + * MTRRs are changed, but changing this requires more invasive + * changes to the way the kernel boots + */ spin_lock(&set_atomicity_lock); - /* Enter the no-fill (CD=1, NW=0) cache mode and flush caches. */ + /* Enter the no-fill (CD=1, NW=0) cache mode and flush caches. */ cr0 = read_cr0() | X86_CR0_CD; write_cr0(cr0); wbinvd(); - /* Save value of CR4 and clear Page Global Enable (bit 7) */ - if ( cpu_has_pge ) { + /* Save value of CR4 and clear Page Global Enable (bit 7) */ + if (cpu_has_pge) { cr4 = read_cr4(); write_cr4(cr4 & ~X86_CR4_PGE); } @@ -582,26 +606,26 @@ static void prepare_set(void) __acquires(set_atomicity_lock) /* Flush all TLBs via a mov %cr3, %reg; mov %reg, %cr3 */ __flush_tlb(); - /* Save MTRR state */ + /* Save MTRR state */ rdmsr(MSR_MTRRdefType, deftype_lo, deftype_hi); - /* Disable MTRRs, and set the default type to uncached */ + /* Disable MTRRs, and set the default type to uncached */ mtrr_wrmsr(MSR_MTRRdefType, deftype_lo & ~0xcff, deftype_hi); } static void post_set(void) __releases(set_atomicity_lock) { - /* Flush TLBs (no need to flush caches - they are disabled) */ + /* Flush TLBs (no need to flush caches - they are disabled) */ __flush_tlb(); /* Intel (P6) standard MTRRs */ mtrr_wrmsr(MSR_MTRRdefType, deftype_lo, deftype_hi); - - /* Enable caches */ + + /* Enable caches */ write_cr0(read_cr0() & 0xbfffffff); - /* Restore value of CR4 */ - if ( cpu_has_pge ) + /* Restore value of CR4 */ + if (cpu_has_pge) write_cr4(cr4); spin_unlock(&set_atomicity_lock); } @@ -623,24 +647,27 @@ static void generic_set_all(void) post_set(); local_irq_restore(flags); - /* Use the atomic bitops to update the global mask */ + /* Use the atomic bitops to update the global mask */ for (count = 0; count < sizeof mask * 8; ++count) { if (mask & 0x01) set_bit(count, &smp_changes_mask); mask >>= 1; } - + } +/** + * generic_set_mtrr - set variable MTRR register on the local CPU. + * + * @reg: The register to set. + * @base: The base address of the region. + * @size: The size of the region. If this is 0 the region is disabled. + * @type: The type of the region. + * + * Returns nothing. + */ static void generic_set_mtrr(unsigned int reg, unsigned long base, unsigned long size, mtrr_type type) -/* [SUMMARY] Set variable MTRR register on the local CPU. - <reg> The register to set. - <base> The base address of the region. - <size> The size of the region. If this is 0 the region is disabled. - <type> The type of the region. - [RETURNS] Nothing. -*/ { unsigned long flags; struct mtrr_var_range *vr; @@ -651,8 +678,10 @@ static void generic_set_mtrr(unsigned int reg, unsigned long base, prepare_set(); if (size == 0) { - /* The invalid bit is kept in the mask, so we simply clear the - relevant mask register to disable a range. */ + /* + * The invalid bit is kept in the mask, so we simply + * clear the relevant mask register to disable a range. + */ mtrr_wrmsr(MTRRphysMask_MSR(reg), 0, 0); memset(vr, 0, sizeof(struct mtrr_var_range)); } else { @@ -669,46 +698,50 @@ static void generic_set_mtrr(unsigned int reg, unsigned long base, local_irq_restore(flags); } -int generic_validate_add_page(unsigned long base, unsigned long size, unsigned int type) +int generic_validate_add_page(unsigned long base, unsigned long size, + unsigned int type) { unsigned long lbase, last; - /* For Intel PPro stepping <= 7, must be 4 MiB aligned - and not touch 0x70000000->0x7003FFFF */ + /* + * For Intel PPro stepping <= 7 + * must be 4 MiB aligned and not touch 0x70000000 -> 0x7003FFFF + */ if (is_cpu(INTEL) && boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 1 && boot_cpu_data.x86_mask <= 7) { if (base & ((1 << (22 - PAGE_SHIFT)) - 1)) { - printk(KERN_WARNING "mtrr: base(0x%lx000) is not 4 MiB aligned\n", base); + pr_warning("mtrr: base(0x%lx000) is not 4 MiB aligned\n", base); return -EINVAL; } if (!(base + size < 0x70000 || base > 0x7003F) && (type == MTRR_TYPE_WRCOMB || type == MTRR_TYPE_WRBACK)) { - printk(KERN_WARNING "mtrr: writable mtrr between 0x70000000 and 0x7003FFFF may hang the CPU.\n"); + pr_warning("mtrr: writable mtrr between 0x70000000 and 0x7003FFFF may hang the CPU.\n"); return -EINVAL; } } - /* Check upper bits of base and last are equal and lower bits are 0 - for base and 1 for last */ + /* + * Check upper bits of base and last are equal and lower bits are 0 + * for base and 1 for last + */ last = base + size - 1; for (lbase = base; !(lbase & 1) && (last & 1); - lbase = lbase >> 1, last = last >> 1) ; + lbase = lbase >> 1, last = last >> 1) + ; if (lbase != last) { - printk(KERN_WARNING "mtrr: base(0x%lx000) is not aligned on a size(0x%lx000) boundary\n", - base, size); + pr_warning("mtrr: base(0x%lx000) is not aligned on a size(0x%lx000) boundary\n", base, size); return -EINVAL; } return 0; } - static int generic_have_wrcomb(void) { unsigned long config, dummy; rdmsr(MSR_MTRRcap, config, dummy); - return (config & (1 << 10)); + return config & (1 << 10); } int positive_have_wrcomb(void) @@ -716,14 +749,15 @@ int positive_have_wrcomb(void) return 1; } -/* generic structure... +/* + * Generic structure... */ struct mtrr_ops generic_mtrr_ops = { - .use_intel_if = 1, - .set_all = generic_set_all, - .get = generic_get_mtrr, - .get_free_region = generic_get_free_region, - .set = generic_set_mtrr, - .validate_add_page = generic_validate_add_page, - .have_wrcomb = generic_have_wrcomb, + .use_intel_if = 1, + .set_all = generic_set_all, + .get = generic_get_mtrr, + .get_free_region = generic_get_free_region, + .set = generic_set_mtrr, + .validate_add_page = generic_validate_add_page, + .have_wrcomb = generic_have_wrcomb, }; diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c index fb73a52913a..08b6ea4c62b 100644 --- a/arch/x86/kernel/cpu/mtrr/if.c +++ b/arch/x86/kernel/cpu/mtrr/if.c @@ -1,27 +1,28 @@ -#include <linux/init.h> -#include <linux/proc_fs.h> #include <linux/capability.h> -#include <linux/ctype.h> -#include <linux/module.h> #include <linux/seq_file.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> +#include <linux/proc_fs.h> +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/init.h> #define LINE_SIZE 80 #include <asm/mtrr.h> + #include "mtrr.h" #define FILE_FCOUNT(f) (((struct seq_file *)((f)->private_data))->private) static const char *const mtrr_strings[MTRR_NUM_TYPES] = { - "uncachable", /* 0 */ - "write-combining", /* 1 */ - "?", /* 2 */ - "?", /* 3 */ - "write-through", /* 4 */ - "write-protect", /* 5 */ - "write-back", /* 6 */ + "uncachable", /* 0 */ + "write-combining", /* 1 */ + "?", /* 2 */ + "?", /* 3 */ + "write-through", /* 4 */ + "write-protect", /* 5 */ + "write-back", /* 6 */ }; const char *mtrr_attrib_to_str(int x) @@ -35,8 +36,8 @@ static int mtrr_file_add(unsigned long base, unsigned long size, unsigned int type, bool increment, struct file *file, int page) { + unsigned int *fcount = FILE_FCOUNT(file); int reg, max; - unsigned int *fcount = FILE_FCOUNT(file); max = num_var_ranges; if (fcount == NULL) { @@ -61,8 +62,8 @@ static int mtrr_file_del(unsigned long base, unsigned long size, struct file *file, int page) { - int reg; unsigned int *fcount = FILE_FCOUNT(file); + int reg; if (!page) { if ((base & (PAGE_SIZE - 1)) || (size & (PAGE_SIZE - 1))) @@ -81,13 +82,14 @@ mtrr_file_del(unsigned long base, unsigned long size, return reg; } -/* RED-PEN: seq_file can seek now. this is ignored. */ +/* + * seq_file can seek but we ignore it. + * + * Format of control line: + * "base=%Lx size=%Lx type=%s" or "disable=%d" + */ static ssize_t mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) -/* Format of control line: - "base=%Lx size=%Lx type=%s" OR: - "disable=%d" -*/ { int i, err; unsigned long reg; @@ -100,15 +102,18 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) return -EPERM; if (!len) return -EINVAL; + memset(line, 0, LINE_SIZE); if (len > LINE_SIZE) len = LINE_SIZE; if (copy_from_user(line, buf, len - 1)) return -EFAULT; + linelen = strlen(line); ptr = line + linelen - 1; if (linelen && *ptr == '\n') *ptr = '\0'; + if (!strncmp(line, "disable=", 8)) { reg = simple_strtoul(line + 8, &ptr, 0); err = mtrr_del_page(reg, 0, 0); @@ -116,28 +121,35 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos) return err; return len; } + if (strncmp(line, "base=", 5)) return -EINVAL; + base = simple_strtoull(line + 5, &ptr, 0); - for (; isspace(*ptr); ++ptr) ; + for (; isspace(*ptr); ++ptr) + ; + if (strncmp(ptr, "size=", 5)) return -EINVAL; + size = simple_strtoull(ptr + 5, &ptr, 0); if ((base & 0xfff) || (size & 0xfff)) return -EINVAL; - for (; isspace(*ptr); ++ptr) ; + for (; isspace(*ptr); ++ptr) + ; + if (strncmp(ptr, "type=", 5)) return -EINVAL; ptr += 5; - for (; isspace(*ptr); ++ptr) ; + for (; isspace(*ptr); ++ptr) + ; + for (i = 0; i < MTRR_NUM_TYPES; ++i) { if (strcmp(ptr, mtrr_strings[i])) continue; base >>= PAGE_SHIFT; size >>= PAGE_SHIFT; - err = - mtrr_add_page((unsigned long) base, (unsigned long) size, i, - true); + err = mtrr_add_page((unsigned long)base, (unsigned long)size, i, true); if (err < 0) return err; return len; @@ -181,7 +193,9 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) case MTRRIOC32_SET_PAGE_ENTRY: case MTRRIOC32_DEL_PAGE_ENTRY: case MTRRIOC32_KILL_PAGE_ENTRY: { - struct mtrr_sentry32 __user *s32 = (struct mtrr_sentry32 __user *)__arg; + struct mtrr_sentry32 __user *s32; + + s32 = (struct mtrr_sentry32 __user *)__arg; err = get_user(sentry.base, &s32->base); err |= get_user(sentry.size, &s32->size); err |= get_user(sentry.type, &s32->type); @@ -191,7 +205,9 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) } case MTRRIOC32_GET_ENTRY: case MTRRIOC32_GET_PAGE_ENTRY: { - struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg; + struct mtrr_gentry32 __user *g32; + + g32 = (struct mtrr_gentry32 __user *)__arg; err = get_user(gentry.regnum, &g32->regnum); err |= get_user(gentry.base, &g32->base); err |= get_user(gentry.size, &g32->size); @@ -314,7 +330,7 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) if (err) return err; - switch(cmd) { + switch (cmd) { case MTRRIOC_GET_ENTRY: case MTRRIOC_GET_PAGE_ENTRY: if (copy_to_user(arg, &gentry, sizeof gentry)) @@ -323,7 +339,9 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) #ifdef CONFIG_COMPAT case MTRRIOC32_GET_ENTRY: case MTRRIOC32_GET_PAGE_ENTRY: { - struct mtrr_gentry32 __user *g32 = (struct mtrr_gentry32 __user *)__arg; + struct mtrr_gentry32 __user *g32; + + g32 = (struct mtrr_gentry32 __user *)__arg; err = put_user(gentry.base, &g32->base); err |= put_user(gentry.size, &g32->size); err |= put_user(gentry.regnum, &g32->regnum); @@ -335,11 +353,10 @@ mtrr_ioctl(struct file *file, unsigned int cmd, unsigned long __arg) return err; } -static int -mtrr_close(struct inode *ino, struct file *file) +static int mtrr_close(struct inode *ino, struct file *file) { - int i, max; unsigned int *fcount = FILE_FCOUNT(file); + int i, max; if (fcount != NULL) { max = num_var_ranges; @@ -359,22 +376,22 @@ static int mtrr_seq_show(struct seq_file *seq, void *offset); static int mtrr_open(struct inode *inode, struct file *file) { - if (!mtrr_if) + if (!mtrr_if) return -EIO; - if (!mtrr_if->get) - return -ENXIO; + if (!mtrr_if->get) + return -ENXIO; return single_open(file, mtrr_seq_show, NULL); } static const struct file_operations mtrr_fops = { - .owner = THIS_MODULE, - .open = mtrr_open, - .read = seq_read, - .llseek = seq_lseek, - .write = mtrr_write, - .unlocked_ioctl = mtrr_ioctl, - .compat_ioctl = mtrr_ioctl, - .release = mtrr_close, + .owner = THIS_MODULE, + .open = mtrr_open, + .read = seq_read, + .llseek = seq_lseek, + .write = mtrr_write, + .unlocked_ioctl = mtrr_ioctl, + .compat_ioctl = mtrr_ioctl, + .release = mtrr_close, }; static int mtrr_seq_show(struct seq_file *seq, void *offset) @@ -388,23 +405,24 @@ static int mtrr_seq_show(struct seq_file *seq, void *offset) max = num_var_ranges; for (i = 0; i < max; i++) { mtrr_if->get(i, &base, &size, &type); - if (size == 0) + if (size == 0) { mtrr_usage_table[i] = 0; - else { - if (size < (0x100000 >> PAGE_SHIFT)) { - /* less than 1MB */ - factor = 'K'; - size <<= PAGE_SHIFT - 10; - } else { - factor = 'M'; - size >>= 20 - PAGE_SHIFT; - } - /* RED-PEN: base can be > 32bit */ - len += seq_printf(seq, - "reg%02i: base=0x%06lx000 (%5luMB), size=%5lu%cB, count=%d: %s\n", - i, base, base >> (20 - PAGE_SHIFT), size, factor, - mtrr_usage_table[i], mtrr_attrib_to_str(type)); + continue; } + if (size < (0x100000 >> PAGE_SHIFT)) { + /* less than 1MB */ + factor = 'K'; + size <<= PAGE_SHIFT - 10; + } else { + factor = 'M'; + size >>= 20 - PAGE_SHIFT; + } + /* Base can be > 32bit */ + len += seq_printf(seq, "reg%02i: base=0x%06lx000 " + "(%5luMB), size=%5lu%cB, count=%d: %s\n", + i, base, base >> (20 - PAGE_SHIFT), size, + factor, mtrr_usage_table[i], + mtrr_attrib_to_str(type)); } return 0; } @@ -422,6 +440,5 @@ static int __init mtrr_if_init(void) proc_create("mtrr", S_IWUSR | S_IRUGO, NULL, &mtrr_fops); return 0; } - arch_initcall(mtrr_if_init); #endif /* CONFIG_PROC_FS */ diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c index 8fc248b5aea..7af0f88a416 100644 --- a/arch/x86/kernel/cpu/mtrr/main.c +++ b/arch/x86/kernel/cpu/mtrr/main.c @@ -25,43 +25,48 @@ Operating System Writer's Guide" (Intel document number 242692), section 11.11.7 - This was cleaned and made readable by Patrick Mochel <mochel@osdl.org> - on 6-7 March 2002. - Source: Intel Architecture Software Developers Manual, Volume 3: + This was cleaned and made readable by Patrick Mochel <mochel@osdl.org> + on 6-7 March 2002. + Source: Intel Architecture Software Developers Manual, Volume 3: System Programming Guide; Section 9.11. (1997 edition - PPro). */ +#define DEBUG + +#include <linux/types.h> /* FIXME: kvm_para.h needs this */ + +#include <linux/kvm_para.h> +#include <linux/uaccess.h> #include <linux/module.h> +#include <linux/mutex.h> #include <linux/init.h> +#include <linux/sort.h> +#include <linux/cpu.h> #include <linux/pci.h> #include <linux/smp.h> -#include <linux/cpu.h> -#include <linux/mutex.h> -#include <linux/sort.h> +#include <asm/processor.h> #include <asm/e820.h> #include <asm/mtrr.h> -#include <asm/uaccess.h> -#include <asm/processor.h> #include <asm/msr.h> -#include <asm/kvm_para.h> + #include "mtrr.h" -u32 num_var_ranges = 0; +u32 num_var_ranges; unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; static DEFINE_MUTEX(mtrr_mutex); u64 size_or_mask, size_and_mask; -static struct mtrr_ops * mtrr_ops[X86_VENDOR_NUM] = {}; +static struct mtrr_ops *mtrr_ops[X86_VENDOR_NUM]; -struct mtrr_ops * mtrr_if = NULL; +struct mtrr_ops *mtrr_if; static void set_mtrr(unsigned int reg, unsigned long base, unsigned long size, mtrr_type type); -void set_mtrr_ops(struct mtrr_ops * ops) +void set_mtrr_ops(struct mtrr_ops *ops) { if (ops->vendor && ops->vendor < X86_VENDOR_NUM) mtrr_ops[ops->vendor] = ops; @@ -72,30 +77,36 @@ static int have_wrcomb(void) { struct pci_dev *dev; u8 rev; - - if ((dev = pci_get_class(PCI_CLASS_BRIDGE_HOST << 8, NULL)) != NULL) { - /* ServerWorks LE chipsets < rev 6 have problems with write-combining - Don't allow it and leave room for other chipsets to be tagged */ + + dev = pci_get_class(PCI_CLASS_BRIDGE_HOST << 8, NULL); + if (dev != NULL) { + /* + * ServerWorks LE chipsets < rev 6 have problems with + * write-combining. Don't allow it and leave room for other + * chipsets to be tagged + */ if (dev->vendor == PCI_VENDOR_ID_SERVERWORKS && dev->device == PCI_DEVICE_ID_SERVERWORKS_LE) { pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev); if (rev <= 5) { - printk(KERN_INFO "mtrr: Serverworks LE rev < 6 detected. Write-combining disabled.\n"); + pr_info("mtrr: Serverworks LE rev < 6 detected. Write-combining disabled.\n"); pci_dev_put(dev); return 0; } } - /* Intel 450NX errata # 23. Non ascending cacheline evictions to - write combining memory may resulting in data corruption */ + /* + * Intel 450NX errata # 23. Non ascending cacheline evictions to + * write combining memory may resulting in data corruption + */ if (dev->vendor == PCI_VENDOR_ID_INTEL && dev->device == PCI_DEVICE_ID_INTEL_82451NX) { - printk(KERN_INFO "mtrr: Intel 450NX MMC detected. Write-combining disabled.\n"); + pr_info("mtrr: Intel 450NX MMC detected. Write-combining disabled.\n"); pci_dev_put(dev); return 0; } pci_dev_put(dev); - } - return (mtrr_if->have_wrcomb ? mtrr_if->have_wrcomb() : 0); + } + return mtrr_if->have_wrcomb ? mtrr_if->have_wrcomb() : 0; } /* This function returns the number of variable MTRRs */ @@ -103,12 +114,13 @@ static void __init set_num_var_ranges(void) { unsigned long config = 0, dummy; - if (use_intel()) { + if (use_intel()) rdmsr(MSR_MTRRcap, config, dummy); - } else if (is_cpu(AMD)) + else if (is_cpu(AMD)) config = 2; else if (is_cpu(CYRIX) || is_cpu(CENTAUR)) config = 8; + num_var_ranges = config & 0xff; } @@ -130,10 +142,12 @@ struct set_mtrr_data { mtrr_type smp_type; }; +/** + * ipi_handler - Synchronisation handler. Executed by "other" CPUs. + * + * Returns nothing. + */ static void ipi_handler(void *info) -/* [SUMMARY] Synchronisation handler. Executed by "other" CPUs. - [RETURNS] Nothing. -*/ { #ifdef CONFIG_SMP struct set_mtrr_data *data = info; @@ -142,18 +156,19 @@ static void ipi_handler(void *info) local_irq_save(flags); atomic_dec(&data->count); - while(!atomic_read(&data->gate)) + while (!atomic_read(&data->gate)) cpu_relax(); /* The master has cleared me to execute */ - if (data->smp_reg != ~0U) - mtrr_if->set(data->smp_reg, data->smp_base, + if (data->smp_reg != ~0U) { + mtrr_if->set(data->smp_reg, data->smp_base, data->smp_size, data->smp_type); - else + } else { mtrr_if->set_all(); + } atomic_dec(&data->count); - while(atomic_read(&data->gate)) + while (atomic_read(&data->gate)) cpu_relax(); atomic_dec(&data->count); @@ -161,7 +176,8 @@ static void ipi_handler(void *info) #endif } -static inline int types_compatible(mtrr_type type1, mtrr_type type2) { +static inline int types_compatible(mtrr_type type1, mtrr_type type2) +{ return type1 == MTRR_TYPE_UNCACHABLE || type2 == MTRR_TYPE_UNCACHABLE || (type1 == MTRR_TYPE_WRTHROUGH && type2 == MTRR_TYPE_WRBACK) || @@ -176,10 +192,10 @@ static inline int types_compatible(mtrr_type type1, mtrr_type type2) { * @type: mtrr type * * This is kinda tricky, but fortunately, Intel spelled it out for us cleanly: - * + * * 1. Send IPI to do the following: * 2. Disable Interrupts - * 3. Wait for all procs to do so + * 3. Wait for all procs to do so * 4. Enter no-fill cache mode * 5. Flush caches * 6. Clear PGE bit @@ -189,26 +205,27 @@ static inline int types_compatible(mtrr_type type1, mtrr_type type2) { * 10. Enable all range registers * 11. Flush all TLBs and caches again * 12. Enter normal cache mode and reenable caching - * 13. Set PGE + * 13. Set PGE * 14. Wait for buddies to catch up * 15. Enable interrupts. - * + * * What does that mean for us? Well, first we set data.count to the number * of CPUs. As each CPU disables interrupts, it'll decrement it once. We wait * until it hits 0 and proceed. We set the data.gate flag and reset data.count. - * Meanwhile, they are waiting for that flag to be set. Once it's set, each - * CPU goes through the transition of updating MTRRs. The CPU vendors may each do it - * differently, so we call mtrr_if->set() callback and let them take care of it. - * When they're done, they again decrement data->count and wait for data.gate to - * be reset. - * When we finish, we wait for data.count to hit 0 and toggle the data.gate flag. + * Meanwhile, they are waiting for that flag to be set. Once it's set, each + * CPU goes through the transition of updating MTRRs. + * The CPU vendors may each do it differently, + * so we call mtrr_if->set() callback and let them take care of it. + * When they're done, they again decrement data->count and wait for data.gate + * to be reset. + * When we finish, we wait for data.count to hit 0 and toggle the data.gate flag * Everyone then enables interrupts and we all continue on. * * Note that the mechanism is the same for UP systems, too; all the SMP stuff * becomes nops. */ -static void set_mtrr(unsigned int reg, unsigned long base, - unsigned long size, mtrr_type type) +static void +set_mtrr(unsigned int reg, unsigned long base, unsigned long size, mtrr_type type) { struct set_mtrr_data data; unsigned long flags; @@ -218,121 +235,122 @@ static void set_mtrr(unsigned int reg, unsigned long base, data.smp_size = size; data.smp_type = type; atomic_set(&data.count, num_booting_cpus() - 1); - /* make sure data.count is visible before unleashing other CPUs */ + + /* Make sure data.count is visible before unleashing other CPUs */ smp_wmb(); - atomic_set(&data.gate,0); + atomic_set(&data.gate, 0); - /* Start the ball rolling on other CPUs */ + /* Start the ball rolling on other CPUs */ if (smp_call_function(ipi_handler, &data, 0) != 0) panic("mtrr: timed out waiting for other CPUs\n"); local_irq_save(flags); - while(atomic_read(&data.count)) + while (atomic_read(&data.count)) cpu_relax(); - /* ok, reset count and toggle gate */ + /* Ok, reset count and toggle gate */ atomic_set(&data.count, num_booting_cpus() - 1); smp_wmb(); - atomic_set(&data.gate,1); + atomic_set(&data.gate, 1); - /* do our MTRR business */ + /* Do our MTRR business */ - /* HACK! + /* + * HACK! * We use this same function to initialize the mtrrs on boot. * The state of the boot cpu's mtrrs has been saved, and we want - * to replicate across all the APs. + * to replicate across all the APs. * If we're doing that @reg is set to something special... */ - if (reg != ~0U) - mtrr_if->set(reg,base,size,type); + if (reg != ~0U) + mtrr_if->set(reg, base, size, type); - /* wait for the others */ - while(atomic_read(&data.count)) + /* Wait for the others */ + while (atomic_read(&data.count)) cpu_relax(); atomic_set(&data.count, num_booting_cpus() - 1); smp_wmb(); - atomic_set(&data.gate,0); + atomic_set(&data.gate, 0); /* * Wait here for everyone to have seen the gate change * So we're the last ones to touch 'data' */ - while(atomic_read(&data.count)) + while (atomic_read(&data.count)) cpu_relax(); local_irq_restore(flags); } /** - * mtrr_add_page - Add a memory type region - * @base: Physical base address of region in pages (in units of 4 kB!) - * @size: Physical size of region in pages (4 kB) - * @type: Type of MTRR desired - * @increment: If this is true do usage counting on the region + * mtrr_add_page - Add a memory type region + * @base: Physical base address of region in pages (in units of 4 kB!) + * @size: Physical size of region in pages (4 kB) + * @type: Type of MTRR desired + * @increment: If this is true do usage counting on the region * - * Memory type region registers control the caching on newer Intel and - * non Intel processors. This function allows drivers to request an - * MTRR is added. The details and hardware specifics of each processor's - * implementation are hidden from the caller, but nevertheless the - * caller should expect to need to provide a power of two size on an - * equivalent power of two boundary. + * Memory type region registers control the caching on newer Intel and + * non Intel processors. This function allows drivers to request an + * MTRR is added. The details and hardware specifics of each processor's + * implementation are hidden from the caller, but nevertheless the + * caller should expect to need to provide a power of two size on an + * equivalent power of two boundary. * - * If the region cannot be added either because all regions are in use - * or the CPU cannot support it a negative value is returned. On success - * the register number for this entry is returned, but should be treated - * as a cookie only. + * If the region cannot be added either because all regions are in use + * or the CPU cannot support it a negative value is returned. On success + * the register number for this entry is returned, but should be treated + * as a cookie only. * - * On a multiprocessor machine the changes are made to all processors. - * This is required on x86 by the Intel processors. + * On a multiprocessor machine the changes are made to all processors. + * This is required on x86 by the Intel processors. * - * The available types are + * The available types are * - * %MTRR_TYPE_UNCACHABLE - No caching + * %MTRR_TYPE_UNCACHABLE - No caching * - * %MTRR_TYPE_WRBACK - Write data back in bursts whenever + * %MTRR_TYPE_WRBACK - Write data back in bursts whenever * - * %MTRR_TYPE_WRCOMB - Write data back soon but allow bursts + * %MTRR_TYPE_WRCOMB - Write data back soon but allow bursts * - * %MTRR_TYPE_WRTHROUGH - Cache reads but not writes + * %MTRR_TYPE_WRTHROUGH - Cache reads but not writes * - * BUGS: Needs a quiet flag for the cases where drivers do not mind - * failures and do not wish system log messages to be sent. + * BUGS: Needs a quiet flag for the cases where drivers do not mind + * failures and do not wish system log messages to be sent. */ - -int mtrr_add_page(unsigned long base, unsigned long size, +int mtrr_add_page(unsigned long base, unsigned long size, unsigned int type, bool increment) { + unsigned long lbase, lsize; int i, replace, error; mtrr_type ltype; - unsigned long lbase, lsize; if (!mtrr_if) return -ENXIO; - - if ((error = mtrr_if->validate_add_page(base,size,type))) + + error = mtrr_if->validate_add_page(base, size, type); + if (error) return error; if (type >= MTRR_NUM_TYPES) { - printk(KERN_WARNING "mtrr: type: %u invalid\n", type); + pr_warning("mtrr: type: %u invalid\n", type); return -EINVAL; } - /* If the type is WC, check that this processor supports it */ + /* If the type is WC, check that this processor supports it */ if ((type == MTRR_TYPE_WRCOMB) && !have_wrcomb()) { - printk(KERN_WARNING - "mtrr: your processor doesn't support write-combining\n"); + pr_warning("mtrr: your processor doesn't support write-combining\n"); return -ENOSYS; } if (!size) { - printk(KERN_WARNING "mtrr: zero sized request\n"); + pr_warning("mtrr: zero sized request\n"); return -EINVAL; } if (base & size_or_mask || size & size_or_mask) { - printk(KERN_WARNING "mtrr: base or size exceeds the MTRR width\n"); + pr_warning("mtrr: base or size exceeds the MTRR width\n"); return -EINVAL; } @@ -341,36 +359,40 @@ int mtrr_add_page(unsigned long base, unsigned long size, /* No CPU hotplug when we change MTRR entries */ get_online_cpus(); - /* Search for existing MTRR */ + + /* Search for existing MTRR */ mutex_lock(&mtrr_mutex); for (i = 0; i < num_var_ranges; ++i) { mtrr_if->get(i, &lbase, &lsize, <ype); - if (!lsize || base > lbase + lsize - 1 || base + size - 1 < lbase) + if (!lsize || base > lbase + lsize - 1 || + base + size - 1 < lbase) continue; - /* At this point we know there is some kind of overlap/enclosure */ + /* + * At this point we know there is some kind of + * overlap/enclosure + */ if (base < lbase || base + size - 1 > lbase + lsize - 1) { - if (base <= lbase && base + size - 1 >= lbase + lsize - 1) { + if (base <= lbase && + base + size - 1 >= lbase + lsize - 1) { /* New region encloses an existing region */ if (type == ltype) { replace = replace == -1 ? i : -2; continue; - } - else if (types_compatible(type, ltype)) + } else if (types_compatible(type, ltype)) continue; } - printk(KERN_WARNING - "mtrr: 0x%lx000,0x%lx000 overlaps existing" - " 0x%lx000,0x%lx000\n", base, size, lbase, - lsize); + pr_warning("mtrr: 0x%lx000,0x%lx000 overlaps existing" + " 0x%lx000,0x%lx000\n", base, size, lbase, + lsize); goto out; } - /* New region is enclosed by an existing region */ + /* New region is enclosed by an existing region */ if (ltype != type) { if (types_compatible(type, ltype)) continue; - printk (KERN_WARNING "mtrr: type mismatch for %lx000,%lx000 old: %s new: %s\n", - base, size, mtrr_attrib_to_str(ltype), - mtrr_attrib_to_str(type)); + pr_warning("mtrr: type mismatch for %lx000,%lx000 old: %s new: %s\n", + base, size, mtrr_attrib_to_str(ltype), + mtrr_attrib_to_str(type)); goto out; } if (increment) @@ -378,7 +400,7 @@ int mtrr_add_page(unsigned long base, unsigned long size, error = i; goto out; } - /* Search for an empty MTRR */ + /* Search for an empty MTRR */ i = mtrr_if->get_free_region(base, size, replace); if (i >= 0) { set_mtrr(i, base, size, type); @@ -393,8 +415,9 @@ int mtrr_add_page(unsigned long base, unsigned long size, mtrr_usage_table[replace] = 0; } } - } else - printk(KERN_INFO "mtrr: no more MTRRs available\n"); + } else { + pr_info("mtrr: no more MTRRs available\n"); + } error = i; out: mutex_unlock(&mtrr_mutex); @@ -405,10 +428,8 @@ int mtrr_add_page(unsigned long base, unsigned long size, static int mtrr_check(unsigned long base, unsigned long size) { if ((base & (PAGE_SIZE - 1)) || (size & (PAGE_SIZE - 1))) { - printk(KERN_WARNING - "mtrr: size and base must be multiples of 4 kiB\n"); - printk(KERN_DEBUG - "mtrr: size: 0x%lx base: 0x%lx\n", size, base); + pr_warning("mtrr: size and base must be multiples of 4 kiB\n"); + pr_debug("mtrr: size: 0x%lx base: 0x%lx\n", size, base); dump_stack(); return -1; } @@ -416,66 +437,64 @@ static int mtrr_check(unsigned long base, unsigned long size) } /** - * mtrr_add - Add a memory type region - * @base: Physical base address of region - * @size: Physical size of region - * @type: Type of MTRR desired - * @increment: If this is true do usage counting on the region + * mtrr_add - Add a memory type region + * @base: Physical base address of region + * @size: Physical size of region + * @type: Type of MTRR desired + * @increment: If this is true do usage counting on the region * - * Memory type region registers control the caching on newer Intel and - * non Intel processors. This function allows drivers to request an - * MTRR is added. The details and hardware specifics of each processor's - * implementation are hidden from the caller, but nevertheless the - * caller should expect to need to provide a power of two size on an - * equivalent power of two boundary. + * Memory type region registers control the caching on newer Intel and + * non Intel processors. This function allows drivers to request an + * MTRR is added. The details and hardware specifics of each processor's + * implementation are hidden from the caller, but nevertheless the + * caller should expect to need to provide a power of two size on an + * equivalent power of two boundary. * - * If the region cannot be added either because all regions are in use - * or the CPU cannot support it a negative value is returned. On success - * the register number for this entry is returned, but should be treated - * as a cookie only. + * If the region cannot be added either because all regions are in use + * or the CPU cannot support it a negative value is returned. On success + * the register number for this entry is returned, but should be treated + * as a cookie only. * - * On a multiprocessor machine the changes are made to all processors. - * This is required on x86 by the Intel processors. + * On a multiprocessor machine the changes are made to all processors. + * This is required on x86 by the Intel processors. * - * The available types are + * The available types are * - * %MTRR_TYPE_UNCACHABLE - No caching + * %MTRR_TYPE_UNCACHABLE - No caching * - * %MTRR_TYPE_WRBACK - Write data back in bursts whenever + * %MTRR_TYPE_WRBACK - Write data back in bursts whenever * - * %MTRR_TYPE_WRCOMB - Write data back soon but allow bursts + * %MTRR_TYPE_WRCOMB - Write data back soon but allow bursts * - * %MTRR_TYPE_WRTHROUGH - Cache reads but not writes + * %MTRR_TYPE_WRTHROUGH - Cache reads but not writes * - * BUGS: Needs a quiet flag for the cases where drivers do not mind - * failures and do not wish system log messages to be sent. + * BUGS: Needs a quiet flag for the cases where drivers do not mind + * failures and do not wish system log messages to be sent. */ - -int -mtrr_add(unsigned long base, unsigned long size, unsigned int type, - bool increment) +int mtrr_add(unsigned long base, unsigned long size, unsigned int type, + bool increment) { if (mtrr_check(base, size)) return -EINVAL; return mtrr_add_page(base >> PAGE_SHIFT, size >> PAGE_SHIFT, type, increment); } +EXPORT_SYMBOL(mtrr_add); /** - * mtrr_del_page - delete a memory type region - * @reg: Register returned by mtrr_add - * @base: Physical base address - * @size: Size of region + * mtrr_del_page - delete a memory type region + * @reg: Register returned by mtrr_add + * @base: Physical base address + * @size: Size of region * - * If register is supplied then base and size are ignored. This is - * how drivers should call it. + * If register is supplied then base and size are ignored. This is + * how drivers should call it. * - * Releases an MTRR region. If the usage count drops to zero the - * register is freed and the region returns to default state. - * On success the register is returned, on failure a negative error - * code. + * Releases an MTRR region. If the usage count drops to zero the + * register is freed and the region returns to default state. + * On success the register is returned, on failure a negative error + * code. */ - int mtrr_del_page(int reg, unsigned long base, unsigned long size) { int i, max; @@ -500,22 +519,22 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size) } } if (reg < 0) { - printk(KERN_DEBUG "mtrr: no MTRR for %lx000,%lx000 found\n", base, - size); + pr_debug("mtrr: no MTRR for %lx000,%lx000 found\n", + base, size); goto out; } } if (reg >= max) { - printk(KERN_WARNING "mtrr: register: %d too big\n", reg); + pr_warning("mtrr: register: %d too big\n", reg); goto out; } mtrr_if->get(reg, &lbase, &lsize, <ype); if (lsize < 1) { - printk(KERN_WARNING "mtrr: MTRR %d not used\n", reg); + pr_warning("mtrr: MTRR %d not used\n", reg); goto out; } if (mtrr_usage_table[reg] < 1) { - printk(KERN_WARNING "mtrr: reg: %d has count=0\n", reg); + pr_warning("mtrr: reg: %d has count=0\n", reg); goto out; } if (--mtrr_usage_table[reg] < 1) @@ -526,33 +545,31 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size) put_online_cpus(); return error; } + /** - * mtrr_del - delete a memory type region - * @reg: Register returned by mtrr_add - * @base: Physical base address - * @size: Size of region + * mtrr_del - delete a memory type region + * @reg: Register returned by mtrr_add + * @base: Physical base address + * @size: Size of region * - * If register is supplied then base and size are ignored. This is - * how drivers should call it. + * If register is supplied then base and size are ignored. This is + * how drivers should call it. * - * Releases an MTRR region. If the usage count drops to zero the - * register is freed and the region returns to default state. - * On success the register is returned, on failure a negative error - * code. + * Releases an MTRR region. If the usage count drops to zero the + * register is freed and the region returns to default state. + * On success the register is returned, on failure a negative error + * code. */ - -int -mtrr_del(int reg, unsigned long base, unsigned long size) +int mtrr_del(int reg, unsigned long base, unsigned long size) { if (mtrr_check(base, size)) return -EINVAL; return mtrr_del_page(reg, base >> PAGE_SHIFT, size >> PAGE_SHIFT); } - -EXPORT_SYMBOL(mtrr_add); EXPORT_SYMBOL(mtrr_del); -/* HACK ALERT! +/* + * HACK ALERT! * These should be called implicitly, but we can't yet until all the initcall * stuff is done... */ @@ -576,29 +593,28 @@ struct mtrr_value { static struct mtrr_value mtrr_value[MTRR_MAX_VAR_RANGES]; -static int mtrr_save(struct sys_device * sysdev, pm_message_t state) +static int mtrr_save(struct sys_device *sysdev, pm_message_t state) { int i; for (i = 0; i < num_var_ranges; i++) { - mtrr_if->get(i, - &mtrr_value[i].lbase, - &mtrr_value[i].lsize, - &mtrr_value[i].ltype); + mtrr_if->get(i, &mtrr_value[i].lbase, + &mtrr_value[i].lsize, + &mtrr_value[i].ltype); } return 0; } -static int mtrr_restore(struct sys_device * sysdev) +static int mtrr_restore(struct sys_device *sysdev) { int i; for (i = 0; i < num_var_ranges; i++) { - if (mtrr_value[i].lsize) - set_mtrr(i, - mtrr_value[i].lbase, - mtrr_value[i].lsize, - mtrr_value[i].ltype); + if (mtrr_value[i].lsize) { + set_mtrr(i, mtrr_value[i].lbase, + mtrr_value[i].lsize, + mtrr_value[i].ltype); + } } return 0; } @@ -615,26 +631,29 @@ int __initdata changed_by_mtrr_cleanup; /** * mtrr_bp_init - initialize mtrrs on the boot CPU * - * This needs to be called early; before any of the other CPUs are + * This needs to be called early; before any of the other CPUs are * initialized (i.e. before smp_init()). - * + * */ void __init mtrr_bp_init(void) { u32 phys_addr; + init_ifs(); phys_addr = 32; if (cpu_has_mtrr) { mtrr_if = &generic_mtrr_ops; - size_or_mask = 0xff000000; /* 36 bits */ + size_or_mask = 0xff000000; /* 36 bits */ size_and_mask = 0x00f00000; phys_addr = 36; - /* This is an AMD specific MSR, but we assume(hope?) that - Intel will implement it to when they extend the address - bus of the Xeon. */ + /* + * This is an AMD specific MSR, but we assume(hope?) that + * Intel will implement it to when they extend the address + * bus of the Xeon. + */ if (cpuid_eax(0x80000000) >= 0x80000008) { phys_addr = cpuid_eax(0x80000008) & 0xff; /* CPUID workaround for Intel 0F33/0F34 CPU */ @@ -649,9 +668,11 @@ void __init mtrr_bp_init(void) size_and_mask = ~size_or_mask & 0xfffff00000ULL; } else if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR && boot_cpu_data.x86 == 6) { - /* VIA C* family have Intel style MTRRs, but - don't support PAE */ - size_or_mask = 0xfff00000; /* 32 bits */ + /* + * VIA C* family have Intel style MTRRs, + * but don't support PAE + */ + size_or_mask = 0xfff00000; /* 32 bits */ size_and_mask = 0; phys_addr = 32; } @@ -694,7 +715,6 @@ void __init mtrr_bp_init(void) changed_by_mtrr_cleanup = 1; mtrr_if->set_all(); } - } } } @@ -706,12 +726,17 @@ void mtrr_ap_init(void) if (!mtrr_if || !use_intel()) return; /* - * Ideally we should hold mtrr_mutex here to avoid mtrr entries changed, - * but this routine will be called in cpu boot time, holding the lock - * breaks it. This routine is called in two cases: 1.very earily time - * of software resume, when there absolutely isn't mtrr entry changes; - * 2.cpu hotadd time. We let mtrr_add/del_page hold cpuhotplug lock to - * prevent mtrr entry changes + * Ideally we should hold mtrr_mutex here to avoid mtrr entries + * changed, but this routine will be called in cpu boot time, + * holding the lock breaks it. + * + * This routine is called in two cases: + * + * 1. very earily time of software resume, when there absolutely + * isn't mtrr entry changes; + * + * 2. cpu hotadd time. We let mtrr_add/del_page hold cpuhotplug + * lock to prevent mtrr entry changes */ local_irq_save(flags); @@ -732,19 +757,23 @@ static int __init mtrr_init_finialize(void) { if (!mtrr_if) return 0; + if (use_intel()) { if (!changed_by_mtrr_cleanup) mtrr_state_warn(); - } else { - /* The CPUs haven't MTRR and seem to not support SMP. They have - * specific drivers, we use a tricky method to support - * suspend/resume for them. - * TBD: is there any system with such CPU which supports - * suspend/resume? if no, we should remove the code. - */ - sysdev_driver_register(&cpu_sysdev_class, - &mtrr_sysdev_driver); + return 0; } + + /* + * The CPU has no MTRR and seems to not support SMP. They have + * specific drivers, we use a tricky method to support + * suspend/resume for them. + * + * TBD: is there any system with such CPU which supports + * suspend/resume? If no, we should remove the code. + */ + sysdev_driver_register(&cpu_sysdev_class, &mtrr_sysdev_driver); + return 0; } subsys_initcall(mtrr_init_finialize); diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.h b/arch/x86/kernel/cpu/mtrr/mtrr.h index 7538b767f20..a501dee9a87 100644 --- a/arch/x86/kernel/cpu/mtrr/mtrr.h +++ b/arch/x86/kernel/cpu/mtrr/mtrr.h @@ -1,5 +1,5 @@ /* - * local mtrr defines. + * local MTRR defines. */ #include <linux/types.h> @@ -14,13 +14,12 @@ extern unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; struct mtrr_ops { u32 vendor; u32 use_intel_if; -// void (*init)(void); void (*set)(unsigned int reg, unsigned long base, unsigned long size, mtrr_type type); void (*set_all)(void); void (*get)(unsigned int reg, unsigned long *base, - unsigned long *size, mtrr_type * type); + unsigned long *size, mtrr_type *type); int (*get_free_region)(unsigned long base, unsigned long size, int replace_reg); int (*validate_add_page)(unsigned long base, unsigned long size, @@ -39,11 +38,11 @@ extern int positive_have_wrcomb(void); /* library functions for processor-specific routines */ struct set_mtrr_context { - unsigned long flags; - unsigned long cr4val; - u32 deftype_lo; - u32 deftype_hi; - u32 ccr3; + unsigned long flags; + unsigned long cr4val; + u32 deftype_lo; + u32 deftype_hi; + u32 ccr3; }; void set_mtrr_done(struct set_mtrr_context *ctxt); @@ -54,10 +53,10 @@ void fill_mtrr_var_range(unsigned int index, u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi); void get_mtrr_state(void); -extern void set_mtrr_ops(struct mtrr_ops * ops); +extern void set_mtrr_ops(struct mtrr_ops *ops); extern u64 size_or_mask, size_and_mask; -extern struct mtrr_ops * mtrr_if; +extern struct mtrr_ops *mtrr_if; #define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd) #define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1) diff --git a/arch/x86/kernel/cpu/mtrr/state.c b/arch/x86/kernel/cpu/mtrr/state.c index 1f5fb1588d1..dfc80b4e6b0 100644 --- a/arch/x86/kernel/cpu/mtrr/state.c +++ b/arch/x86/kernel/cpu/mtrr/state.c @@ -1,24 +1,25 @@ -#include <linux/mm.h> #include <linux/init.h> -#include <asm/io.h> -#include <asm/mtrr.h> -#include <asm/msr.h> +#include <linux/io.h> +#include <linux/mm.h> + #include <asm/processor-cyrix.h> #include <asm/processor-flags.h> -#include "mtrr.h" +#include <asm/mtrr.h> +#include <asm/msr.h> +#include "mtrr.h" -/* Put the processor into a state where MTRRs can be safely set */ +/* Put the processor into a state where MTRRs can be safely set */ void set_mtrr_prepare_save(struct set_mtrr_context *ctxt) { unsigned int cr0; - /* Disable interrupts locally */ + /* Disable interrupts locally */ local_irq_save(ctxt->flags); if (use_intel() || is_cpu(CYRIX)) { - /* Save value of CR4 and clear Page Global Enable (bit 7) */ + /* Save value of CR4 and clear Page Global Enable (bit 7) */ if (cpu_has_pge) { ctxt->cr4val = read_cr4(); write_cr4(ctxt->cr4val & ~X86_CR4_PGE); @@ -33,50 +34,61 @@ void set_mtrr_prepare_save(struct set_mtrr_context *ctxt) write_cr0(cr0); wbinvd(); - if (use_intel()) - /* Save MTRR state */ + if (use_intel()) { + /* Save MTRR state */ rdmsr(MSR_MTRRdefType, ctxt->deftype_lo, ctxt->deftype_hi); - else - /* Cyrix ARRs - everything else were excluded at the top */ + } else { + /* + * Cyrix ARRs - + * everything else were excluded at the top + */ ctxt->ccr3 = getCx86(CX86_CCR3); + } } } void set_mtrr_cache_disable(struct set_mtrr_context *ctxt) { - if (use_intel()) - /* Disable MTRRs, and set the default type to uncached */ + if (use_intel()) { + /* Disable MTRRs, and set the default type to uncached */ mtrr_wrmsr(MSR_MTRRdefType, ctxt->deftype_lo & 0xf300UL, ctxt->deftype_hi); - else if (is_cpu(CYRIX)) - /* Cyrix ARRs - everything else were excluded at the top */ - setCx86(CX86_CCR3, (ctxt->ccr3 & 0x0f) | 0x10); + } else { + if (is_cpu(CYRIX)) { + /* Cyrix ARRs - everything else were excluded at the top */ + setCx86(CX86_CCR3, (ctxt->ccr3 & 0x0f) | 0x10); + } + } } -/* Restore the processor after a set_mtrr_prepare */ +/* Restore the processor after a set_mtrr_prepare */ void set_mtrr_done(struct set_mtrr_context *ctxt) { if (use_intel() || is_cpu(CYRIX)) { - /* Flush caches and TLBs */ + /* Flush caches and TLBs */ wbinvd(); - /* Restore MTRRdefType */ - if (use_intel()) + /* Restore MTRRdefType */ + if (use_intel()) { /* Intel (P6) standard MTRRs */ - mtrr_wrmsr(MSR_MTRRdefType, ctxt->deftype_lo, ctxt->deftype_hi); - else - /* Cyrix ARRs - everything else was excluded at the top */ + mtrr_wrmsr(MSR_MTRRdefType, ctxt->deftype_lo, + ctxt->deftype_hi); + } else { + /* + * Cyrix ARRs - + * everything else was excluded at the top + */ setCx86(CX86_CCR3, ctxt->ccr3); + } - /* Enable caches */ + /* Enable caches */ write_cr0(read_cr0() & 0xbfffffff); - /* Restore value of CR4 */ + /* Restore value of CR4 */ if (cpu_has_pge) write_cr4(ctxt->cr4val); } - /* Re-enable interrupts locally (if enabled previously) */ + /* Re-enable interrupts locally (if enabled previously) */ local_irq_restore(ctxt->flags); } - diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c index 900332b800f..f9cd0849bd4 100644 --- a/arch/x86/kernel/cpu/perf_counter.c +++ b/arch/x86/kernel/cpu/perf_counter.c @@ -6,6 +6,7 @@ * Copyright (C) 2009 Jaswinder Singh Rajput * Copyright (C) 2009 Advanced Micro Devices, Inc., Robert Richter * Copyright (C) 2008-2009 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> + * Copyright (C) 2009 Intel Corporation, <markus.t.metzger@intel.com> * * For licencing details see kernel-base/COPYING */ @@ -20,6 +21,7 @@ #include <linux/sched.h> #include <linux/uaccess.h> #include <linux/highmem.h> +#include <linux/cpu.h> #include <asm/apic.h> #include <asm/stacktrace.h> @@ -27,12 +29,52 @@ static u64 perf_counter_mask __read_mostly; +/* The maximal number of PEBS counters: */ +#define MAX_PEBS_COUNTERS 4 + +/* The size of a BTS record in bytes: */ +#define BTS_RECORD_SIZE 24 + +/* The size of a per-cpu BTS buffer in bytes: */ +#define BTS_BUFFER_SIZE (BTS_RECORD_SIZE * 1024) + +/* The BTS overflow threshold in bytes from the end of the buffer: */ +#define BTS_OVFL_TH (BTS_RECORD_SIZE * 64) + + +/* + * Bits in the debugctlmsr controlling branch tracing. + */ +#define X86_DEBUGCTL_TR (1 << 6) +#define X86_DEBUGCTL_BTS (1 << 7) +#define X86_DEBUGCTL_BTINT (1 << 8) +#define X86_DEBUGCTL_BTS_OFF_OS (1 << 9) +#define X86_DEBUGCTL_BTS_OFF_USR (1 << 10) + +/* + * A debug store configuration. + * + * We only support architectures that use 64bit fields. + */ +struct debug_store { + u64 bts_buffer_base; + u64 bts_index; + u64 bts_absolute_maximum; + u64 bts_interrupt_threshold; + u64 pebs_buffer_base; + u64 pebs_index; + u64 pebs_absolute_maximum; + u64 pebs_interrupt_threshold; + u64 pebs_counter_reset[MAX_PEBS_COUNTERS]; +}; + struct cpu_hw_counters { struct perf_counter *counters[X86_PMC_IDX_MAX]; unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; unsigned long active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)]; unsigned long interrupts; int enabled; + struct debug_store *ds; }; /* @@ -58,6 +100,8 @@ struct x86_pmu { int apic; u64 max_period; u64 intel_ctrl; + void (*enable_bts)(u64 config); + void (*disable_bts)(void); }; static struct x86_pmu x86_pmu __read_mostly; @@ -577,6 +621,9 @@ x86_perf_counter_update(struct perf_counter *counter, u64 prev_raw_count, new_raw_count; s64 delta; + if (idx == X86_PMC_IDX_FIXED_BTS) + return 0; + /* * Careful: an NMI might modify the previous counter value. * @@ -666,10 +713,110 @@ static void release_pmc_hardware(void) #endif } +static inline bool bts_available(void) +{ + return x86_pmu.enable_bts != NULL; +} + +static inline void init_debug_store_on_cpu(int cpu) +{ + struct debug_store *ds = per_cpu(cpu_hw_counters, cpu).ds; + + if (!ds) + return; + + wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA, + (u32)((u64)(unsigned long)ds), + (u32)((u64)(unsigned long)ds >> 32)); +} + +static inline void fini_debug_store_on_cpu(int cpu) +{ + if (!per_cpu(cpu_hw_counters, cpu).ds) + return; + + wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA, 0, 0); +} + +static void release_bts_hardware(void) +{ + int cpu; + + if (!bts_available()) + return; + + get_online_cpus(); + + for_each_online_cpu(cpu) + fini_debug_store_on_cpu(cpu); + + for_each_possible_cpu(cpu) { + struct debug_store *ds = per_cpu(cpu_hw_counters, cpu).ds; + + if (!ds) + continue; + + per_cpu(cpu_hw_counters, cpu).ds = NULL; + + kfree((void *)(unsigned long)ds->bts_buffer_base); + kfree(ds); + } + + put_online_cpus(); +} + +static int reserve_bts_hardware(void) +{ + int cpu, err = 0; + + if (!bts_available()) + return 0; + + get_online_cpus(); + + for_each_possible_cpu(cpu) { + struct debug_store *ds; + void *buffer; + + err = -ENOMEM; + buffer = kzalloc(BTS_BUFFER_SIZE, GFP_KERNEL); + if (unlikely(!buffer)) + break; + + ds = kzalloc(sizeof(*ds), GFP_KERNEL); + if (unlikely(!ds)) { + kfree(buffer); + break; + } + + ds->bts_buffer_base = (u64)(unsigned long)buffer; + ds->bts_index = ds->bts_buffer_base; + ds->bts_absolute_maximum = + ds->bts_buffer_base + BTS_BUFFER_SIZE; + ds->bts_interrupt_threshold = + ds->bts_absolute_maximum - BTS_OVFL_TH; + + per_cpu(cpu_hw_counters, cpu).ds = ds; + err = 0; + } + + if (err) + release_bts_hardware(); + else { + for_each_online_cpu(cpu) + init_debug_store_on_cpu(cpu); + } + + put_online_cpus(); + + return err; +} + static void hw_perf_counter_destroy(struct perf_counter *counter) { if (atomic_dec_and_mutex_lock(&active_counters, &pmc_reserve_mutex)) { release_pmc_hardware(); + release_bts_hardware(); mutex_unlock(&pmc_reserve_mutex); } } @@ -712,6 +859,42 @@ set_ext_hw_attr(struct hw_perf_counter *hwc, struct perf_counter_attr *attr) return 0; } +static void intel_pmu_enable_bts(u64 config) +{ + unsigned long debugctlmsr; + + debugctlmsr = get_debugctlmsr(); + + debugctlmsr |= X86_DEBUGCTL_TR; + debugctlmsr |= X86_DEBUGCTL_BTS; + debugctlmsr |= X86_DEBUGCTL_BTINT; + + if (!(config & ARCH_PERFMON_EVENTSEL_OS)) + debugctlmsr |= X86_DEBUGCTL_BTS_OFF_OS; + + if (!(config & ARCH_PERFMON_EVENTSEL_USR)) + debugctlmsr |= X86_DEBUGCTL_BTS_OFF_USR; + + update_debugctlmsr(debugctlmsr); +} + +static void intel_pmu_disable_bts(void) +{ + struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); + unsigned long debugctlmsr; + + if (!cpuc->ds) + return; + + debugctlmsr = get_debugctlmsr(); + + debugctlmsr &= + ~(X86_DEBUGCTL_TR | X86_DEBUGCTL_BTS | X86_DEBUGCTL_BTINT | + X86_DEBUGCTL_BTS_OFF_OS | X86_DEBUGCTL_BTS_OFF_USR); + + update_debugctlmsr(debugctlmsr); +} + /* * Setup the hardware configuration for a given attr_type */ @@ -728,9 +911,13 @@ static int __hw_perf_counter_init(struct perf_counter *counter) err = 0; if (!atomic_inc_not_zero(&active_counters)) { mutex_lock(&pmc_reserve_mutex); - if (atomic_read(&active_counters) == 0 && !reserve_pmc_hardware()) - err = -EBUSY; - else + if (atomic_read(&active_counters) == 0) { + if (!reserve_pmc_hardware()) + err = -EBUSY; + else + err = reserve_bts_hardware(); + } + if (!err) atomic_inc(&active_counters); mutex_unlock(&pmc_reserve_mutex); } @@ -793,6 +980,20 @@ static int __hw_perf_counter_init(struct perf_counter *counter) if (config == -1LL) return -EINVAL; + /* + * Branch tracing: + */ + if ((attr->config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && + (hwc->sample_period == 1)) { + /* BTS is not supported by this architecture. */ + if (!bts_available()) + return -EOPNOTSUPP; + + /* BTS is currently only allowed for user-mode. */ + if (hwc->config & ARCH_PERFMON_EVENTSEL_OS) + return -EOPNOTSUPP; + } + hwc->config |= config; return 0; @@ -817,7 +1018,18 @@ static void p6_pmu_disable_all(void) static void intel_pmu_disable_all(void) { + struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); + + if (!cpuc->enabled) + return; + + cpuc->enabled = 0; + barrier(); + wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0); + + if (test_bit(X86_PMC_IDX_FIXED_BTS, cpuc->active_mask)) + intel_pmu_disable_bts(); } static void amd_pmu_disable_all(void) @@ -875,7 +1087,25 @@ static void p6_pmu_enable_all(void) static void intel_pmu_enable_all(void) { + struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); + + if (cpuc->enabled) + return; + + cpuc->enabled = 1; + barrier(); + wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl); + + if (test_bit(X86_PMC_IDX_FIXED_BTS, cpuc->active_mask)) { + struct perf_counter *counter = + cpuc->counters[X86_PMC_IDX_FIXED_BTS]; + + if (WARN_ON_ONCE(!counter)) + return; + + intel_pmu_enable_bts(counter->hw.config); + } } static void amd_pmu_enable_all(void) @@ -962,6 +1192,11 @@ p6_pmu_disable_counter(struct hw_perf_counter *hwc, int idx) static inline void intel_pmu_disable_counter(struct hw_perf_counter *hwc, int idx) { + if (unlikely(idx == X86_PMC_IDX_FIXED_BTS)) { + intel_pmu_disable_bts(); + return; + } + if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) { intel_pmu_disable_fixed(hwc, idx); return; @@ -990,6 +1225,9 @@ x86_perf_counter_set_period(struct perf_counter *counter, s64 period = hwc->sample_period; int err, ret = 0; + if (idx == X86_PMC_IDX_FIXED_BTS) + return 0; + /* * If we are way outside a reasoable range then just skip forward: */ @@ -1072,6 +1310,14 @@ static void p6_pmu_enable_counter(struct hw_perf_counter *hwc, int idx) static void intel_pmu_enable_counter(struct hw_perf_counter *hwc, int idx) { + if (unlikely(idx == X86_PMC_IDX_FIXED_BTS)) { + if (!__get_cpu_var(cpu_hw_counters).enabled) + return; + + intel_pmu_enable_bts(hwc->config); + return; + } + if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) { intel_pmu_enable_fixed(hwc, idx); return; @@ -1093,11 +1339,16 @@ fixed_mode_idx(struct perf_counter *counter, struct hw_perf_counter *hwc) { unsigned int event; + event = hwc->config & ARCH_PERFMON_EVENT_MASK; + + if (unlikely((event == + x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS)) && + (hwc->sample_period == 1))) + return X86_PMC_IDX_FIXED_BTS; + if (!x86_pmu.num_counters_fixed) return -1; - event = hwc->config & ARCH_PERFMON_EVENT_MASK; - if (unlikely(event == x86_pmu.event_map(PERF_COUNT_HW_INSTRUCTIONS))) return X86_PMC_IDX_FIXED_INSTRUCTIONS; if (unlikely(event == x86_pmu.event_map(PERF_COUNT_HW_CPU_CYCLES))) @@ -1118,7 +1369,15 @@ static int x86_pmu_enable(struct perf_counter *counter) int idx; idx = fixed_mode_idx(counter, hwc); - if (idx >= 0) { + if (idx == X86_PMC_IDX_FIXED_BTS) { + /* BTS is already occupied. */ + if (test_and_set_bit(idx, cpuc->used_mask)) + return -EAGAIN; + + hwc->config_base = 0; + hwc->counter_base = 0; + hwc->idx = idx; + } else if (idx >= 0) { /* * Try to get the fixed counter, if that is already taken * then try to get a generic counter: @@ -1229,6 +1488,44 @@ void perf_counter_print_debug(void) local_irq_restore(flags); } +static void intel_pmu_drain_bts_buffer(struct cpu_hw_counters *cpuc, + struct perf_sample_data *data) +{ + struct debug_store *ds = cpuc->ds; + struct bts_record { + u64 from; + u64 to; + u64 flags; + }; + struct perf_counter *counter = cpuc->counters[X86_PMC_IDX_FIXED_BTS]; + unsigned long orig_ip = data->regs->ip; + struct bts_record *at, *top; + + if (!counter) + return; + + if (!ds) + return; + + at = (struct bts_record *)(unsigned long)ds->bts_buffer_base; + top = (struct bts_record *)(unsigned long)ds->bts_index; + + ds->bts_index = ds->bts_buffer_base; + + for (; at < top; at++) { + data->regs->ip = at->from; + data->addr = at->to; + + perf_counter_output(counter, 1, data); + } + + data->regs->ip = orig_ip; + data->addr = 0; + + /* There's new data available. */ + counter->pending_kill = POLL_IN; +} + static void x86_pmu_disable(struct perf_counter *counter) { struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters); @@ -1253,6 +1550,15 @@ static void x86_pmu_disable(struct perf_counter *counter) * that we are disabling: */ x86_perf_counter_update(counter, hwc, idx); + + /* Drain the remaining BTS records. */ + if (unlikely(idx == X86_PMC_IDX_FIXED_BTS)) { + struct perf_sample_data data; + struct pt_regs regs; + + data.regs = ®s; + intel_pmu_drain_bts_buffer(cpuc, &data); + } cpuc->counters[idx] = NULL; clear_bit(idx, cpuc->used_mask); @@ -1280,6 +1586,7 @@ static int intel_pmu_save_and_restart(struct perf_counter *counter) static void intel_pmu_reset(void) { + struct debug_store *ds = __get_cpu_var(cpu_hw_counters).ds; unsigned long flags; int idx; @@ -1297,6 +1604,8 @@ static void intel_pmu_reset(void) for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++) { checking_wrmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, 0ull); } + if (ds) + ds->bts_index = ds->bts_buffer_base; local_irq_restore(flags); } @@ -1362,6 +1671,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs) cpuc = &__get_cpu_var(cpu_hw_counters); perf_disable(); + intel_pmu_drain_bts_buffer(cpuc, &data); status = intel_pmu_get_status(); if (!status) { perf_enable(); @@ -1571,6 +1881,8 @@ static struct x86_pmu intel_pmu = { * the generic counter period: */ .max_period = (1ULL << 31) - 1, + .enable_bts = intel_pmu_enable_bts, + .disable_bts = intel_pmu_disable_bts, }; static struct x86_pmu amd_pmu = { @@ -1962,3 +2274,8 @@ struct perf_callchain_entry *perf_callchain(struct pt_regs *regs) return entry; } + +void hw_perf_counter_setup_online(int cpu) +{ + init_debug_store_on_cpu(cpu); +} diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c index e60ed740d2b..392bea43b89 100644 --- a/arch/x86/kernel/cpu/perfctr-watchdog.c +++ b/arch/x86/kernel/cpu/perfctr-watchdog.c @@ -68,16 +68,16 @@ static inline unsigned int nmi_perfctr_msr_to_bit(unsigned int msr) /* returns the bit offset of the performance counter register */ switch (boot_cpu_data.x86_vendor) { case X86_VENDOR_AMD: - return (msr - MSR_K7_PERFCTR0); + return msr - MSR_K7_PERFCTR0; case X86_VENDOR_INTEL: if (cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) - return (msr - MSR_ARCH_PERFMON_PERFCTR0); + return msr - MSR_ARCH_PERFMON_PERFCTR0; switch (boot_cpu_data.x86) { case 6: - return (msr - MSR_P6_PERFCTR0); + return msr - MSR_P6_PERFCTR0; case 15: - return (msr - MSR_P4_BPU_PERFCTR0); + return msr - MSR_P4_BPU_PERFCTR0; } } return 0; @@ -92,16 +92,16 @@ static inline unsigned int nmi_evntsel_msr_to_bit(unsigned int msr) /* returns the bit offset of the event selection register */ switch (boot_cpu_data.x86_vendor) { case X86_VENDOR_AMD: - return (msr - MSR_K7_EVNTSEL0); + return msr - MSR_K7_EVNTSEL0; case X86_VENDOR_INTEL: if (cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) - return (msr - MSR_ARCH_PERFMON_EVENTSEL0); + return msr - MSR_ARCH_PERFMON_EVENTSEL0; switch (boot_cpu_data.x86) { case 6: - return (msr - MSR_P6_EVNTSEL0); + return msr - MSR_P6_EVNTSEL0; case 15: - return (msr - MSR_P4_BSU_ESCR0); + return msr - MSR_P4_BSU_ESCR0; } } return 0; @@ -113,7 +113,7 @@ int avail_to_resrv_perfctr_nmi_bit(unsigned int counter) { BUG_ON(counter > NMI_MAX_COUNTER_BITS); - return (!test_bit(counter, perfctr_nmi_owner)); + return !test_bit(counter, perfctr_nmi_owner); } /* checks the an msr for availability */ @@ -124,7 +124,7 @@ int avail_to_resrv_perfctr_nmi(unsigned int msr) counter = nmi_perfctr_msr_to_bit(msr); BUG_ON(counter > NMI_MAX_COUNTER_BITS); - return (!test_bit(counter, perfctr_nmi_owner)); + return !test_bit(counter, perfctr_nmi_owner); } EXPORT_SYMBOL(avail_to_resrv_perfctr_nmi_bit); @@ -237,7 +237,7 @@ static unsigned int adjust_for_32bit_ctr(unsigned int hz) */ counter_val = (u64)cpu_khz * 1000; do_div(counter_val, retval); - if (counter_val > 0x7fffffffULL) { + if (counter_val > 0x7fffffffULL) { u64 count = (u64)cpu_khz * 1000; do_div(count, 0x7fffffffUL); retval = count + 1; @@ -251,7 +251,7 @@ static void write_watchdog_counter(unsigned int perfctr_msr, u64 count = (u64)cpu_khz * 1000; do_div(count, nmi_hz); - if(descr) + if (descr) pr_debug("setting %s to -0x%08Lx\n", descr, count); wrmsrl(perfctr_msr, 0 - count); } @@ -262,7 +262,7 @@ static void write_watchdog_counter32(unsigned int perfctr_msr, u64 count = (u64)cpu_khz * 1000; do_div(count, nmi_hz); - if(descr) + if (descr) pr_debug("setting %s to -0x%08Lx\n", descr, count); wrmsr(perfctr_msr, (u32)(-count), 0); } @@ -296,7 +296,7 @@ static int setup_k7_watchdog(unsigned nmi_hz) /* setup the timer */ wrmsr(evntsel_msr, evntsel, 0); - write_watchdog_counter(perfctr_msr, "K7_PERFCTR0",nmi_hz); + write_watchdog_counter(perfctr_msr, "K7_PERFCTR0", nmi_hz); /* initialize the wd struct before enabling */ wd->perfctr_msr = perfctr_msr; @@ -387,7 +387,7 @@ static int setup_p6_watchdog(unsigned nmi_hz) /* setup the timer */ wrmsr(evntsel_msr, evntsel, 0); nmi_hz = adjust_for_32bit_ctr(nmi_hz); - write_watchdog_counter32(perfctr_msr, "P6_PERFCTR0",nmi_hz); + write_watchdog_counter32(perfctr_msr, "P6_PERFCTR0", nmi_hz); /* initialize the wd struct before enabling */ wd->perfctr_msr = perfctr_msr; @@ -415,7 +415,7 @@ static void __kprobes p6_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) apic_write(APIC_LVTPC, APIC_DM_NMI); /* P6/ARCH_PERFMON has 32 bit counter write */ - write_watchdog_counter32(wd->perfctr_msr, NULL,nmi_hz); + write_watchdog_counter32(wd->perfctr_msr, NULL, nmi_hz); } static const struct wd_ops p6_wd_ops = { @@ -490,9 +490,9 @@ static int setup_p4_watchdog(unsigned nmi_hz) if (smp_num_siblings == 2) { unsigned int ebx, apicid; - ebx = cpuid_ebx(1); - apicid = (ebx >> 24) & 0xff; - ht_num = apicid & 1; + ebx = cpuid_ebx(1); + apicid = (ebx >> 24) & 0xff; + ht_num = apicid & 1; } else #endif ht_num = 0; @@ -544,7 +544,7 @@ static int setup_p4_watchdog(unsigned nmi_hz) } evntsel = P4_ESCR_EVENT_SELECT(0x3F) - | P4_ESCR_OS + | P4_ESCR_OS | P4_ESCR_USR; cccr_val |= P4_CCCR_THRESHOLD(15) @@ -612,7 +612,7 @@ static void __kprobes p4_rearm(struct nmi_watchdog_ctlblk *wd, unsigned nmi_hz) { unsigned dummy; /* - * P4 quirks: + * P4 quirks: * - An overflown perfctr will assert its interrupt * until the OVF flag in its CCCR is cleared. * - LVTPC is masked on interrupt and must be @@ -662,7 +662,8 @@ static int setup_intel_arch_watchdog(unsigned nmi_hz) * NOTE: Corresponding bit = 0 in ebx indicates event present. */ cpuid(10, &(eax.full), &ebx, &unused, &unused); - if ((eax.split.mask_length < (ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX+1)) || + if ((eax.split.mask_length < + (ARCH_PERFMON_UNHALTED_CORE_CYCLES_INDEX+1)) || (ebx & ARCH_PERFMON_UNHALTED_CORE_CYCLES_PRESENT)) return 0; diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c index d5e30397246..62ac8cb6ba2 100644 --- a/arch/x86/kernel/cpu/proc.c +++ b/arch/x86/kernel/cpu/proc.c @@ -116,11 +116,9 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "TLB size\t: %d 4K pages\n", c->x86_tlbsize); #endif seq_printf(m, "clflush size\t: %u\n", c->x86_clflush_size); -#ifdef CONFIG_X86_64 seq_printf(m, "cache_alignment\t: %d\n", c->x86_cache_alignment); seq_printf(m, "address sizes\t: %u bits physical, %u bits virtual\n", c->x86_phys_bits, c->x86_virt_bits); -#endif seq_printf(m, "power management:"); for (i = 0; i < 32; i++) { @@ -128,7 +126,7 @@ static int show_cpuinfo(struct seq_file *m, void *v) if (i < ARRAY_SIZE(x86_power_flags) && x86_power_flags[i]) seq_printf(m, "%s%s", - x86_power_flags[i][0]?" ":"", + x86_power_flags[i][0] ? " " : "", x86_power_flags[i]); else seq_printf(m, " [%d]", i); diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 284c399e323..bc24f514ec9 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -49,17 +49,17 @@ static inline int __vmware_platform(void) static unsigned long __vmware_get_tsc_khz(void) { - uint64_t tsc_hz; - uint32_t eax, ebx, ecx, edx; + uint64_t tsc_hz; + uint32_t eax, ebx, ecx, edx; - VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); + VMWARE_PORT(GETHZ, eax, ebx, ecx, edx); - if (ebx == UINT_MAX) - return 0; - tsc_hz = eax | (((uint64_t)ebx) << 32); - do_div(tsc_hz, 1000); - BUG_ON(tsc_hz >> 32); - return tsc_hz; + if (ebx == UINT_MAX) + return 0; + tsc_hz = eax | (((uint64_t)ebx) << 32); + do_div(tsc_hz, 1000); + BUG_ON(tsc_hz >> 32); + return tsc_hz; } /* diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c index b4f14c6c09d..37250fe490b 100644 --- a/arch/x86/kernel/doublefault_32.c +++ b/arch/x86/kernel/doublefault_32.c @@ -27,9 +27,7 @@ static void doublefault_fn(void) if (ptr_ok(gdt)) { gdt += GDT_ENTRY_TSS << 3; - tss = *(u16 *)(gdt+2); - tss += *(u8 *)(gdt+4) << 16; - tss += *(u8 *)(gdt+7) << 24; + tss = get_desc_base((struct desc_struct *)gdt); printk(KERN_EMERG "double fault, tss at %08lx\n", tss); if (ptr_ok(tss)) { diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c index 48bfe138603..ef42a038f1a 100644 --- a/arch/x86/kernel/ds.c +++ b/arch/x86/kernel/ds.c @@ -509,15 +509,15 @@ enum bts_field { bts_escape = ((unsigned long)-1 & ~bts_qual_mask) }; -static inline unsigned long bts_get(const char *base, enum bts_field field) +static inline unsigned long bts_get(const char *base, unsigned long field) { base += (ds_cfg.sizeof_ptr_field * field); return *(unsigned long *)base; } -static inline void bts_set(char *base, enum bts_field field, unsigned long val) +static inline void bts_set(char *base, unsigned long field, unsigned long val) { - base += (ds_cfg.sizeof_ptr_field * field);; + base += (ds_cfg.sizeof_ptr_field * field); (*(unsigned long *)base) = val; } diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c index c8405718a4c..2d8a371d433 100644 --- a/arch/x86/kernel/dumpstack.c +++ b/arch/x86/kernel/dumpstack.c @@ -15,7 +15,6 @@ #include <linux/bug.h> #include <linux/nmi.h> #include <linux/sysfs.h> -#include <linux/ftrace.h> #include <asm/stacktrace.h> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 5cb5725b2ba..147005a1cc3 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -115,7 +115,7 @@ static void __init __e820_add_region(struct e820map *e820x, u64 start, u64 size, { int x = e820x->nr_map; - if (x == ARRAY_SIZE(e820x->map)) { + if (x >= ARRAY_SIZE(e820x->map)) { printk(KERN_ERR "Ooops! Too many entries in the memory map!\n"); return; } diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index cc827ac9e8d..7ffec6b3b33 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -439,7 +439,6 @@ is386: movl $2,%ecx # set MP jne 1f movl $per_cpu__gdt_page,%eax movl $per_cpu__stack_canary,%ecx - subl $20, %ecx movw %cx, 8 * GDT_ENTRY_STACK_CANARY + 2(%eax) shrl $16, %ecx movb %cl, 8 * GDT_ENTRY_STACK_CANARY + 4(%eax) diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index 3b09634a515..7d35d0fe232 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -218,7 +218,6 @@ bool handle_irq(unsigned irq, struct pt_regs *regs) void fixup_irqs(void) { unsigned int irq; - static int warned; struct irq_desc *desc; for_each_irq_desc(irq, desc) { @@ -236,8 +235,8 @@ void fixup_irqs(void) } if (desc->chip->set_affinity) desc->chip->set_affinity(irq, affinity); - else if (desc->action && !(warned++)) - printk("Cannot set affinity for irq %i\n", irq); + else if (desc->action) + printk_once("Cannot set affinity for irq %i\n", irq); } #if 0 diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index c664d515f61..63b0ec8d3d4 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -34,7 +34,6 @@ struct kvm_para_state { u8 mmu_queue[MMU_QUEUE_SIZE]; int mmu_queue_len; - enum paravirt_lazy_mode mode; }; static DEFINE_PER_CPU(struct kvm_para_state, para_state); @@ -77,7 +76,7 @@ static void kvm_deferred_mmu_op(void *buffer, int len) { struct kvm_para_state *state = kvm_para_state(); - if (state->mode != PARAVIRT_LAZY_MMU) { + if (paravirt_get_lazy_mode() != PARAVIRT_LAZY_MMU) { kvm_mmu_op(buffer, len); return; } @@ -185,10 +184,7 @@ static void kvm_release_pt(unsigned long pfn) static void kvm_enter_lazy_mmu(void) { - struct kvm_para_state *state = kvm_para_state(); - paravirt_enter_lazy_mmu(); - state->mode = paravirt_get_lazy_mode(); } static void kvm_leave_lazy_mmu(void) @@ -197,7 +193,6 @@ static void kvm_leave_lazy_mmu(void) mmu_queue_flush(state); paravirt_leave_lazy_mmu(); - state->mode = paravirt_get_lazy_mode(); } static void __init paravirt_ops_setup(void) diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c index 223af43f152..e5efcdcca31 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -50,8 +50,8 @@ static unsigned long kvm_get_wallclock(void) struct timespec ts; int low, high; - low = (int)__pa(&wall_clock); - high = ((u64)__pa(&wall_clock) >> 32); + low = (int)__pa_symbol(&wall_clock); + high = ((u64)__pa_symbol(&wall_clock) >> 32); native_write_msr(MSR_KVM_WALL_CLOCK, low, high); vcpu_time = &get_cpu_var(hv_clock); diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c index 651c93b2886..fcd513bf284 100644 --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -482,11 +482,11 @@ static void __init construct_ioapic_table(int mpc_default_type) MP_bus_info(&bus); } - ioapic.type = MP_IOAPIC; - ioapic.apicid = 2; - ioapic.apicver = mpc_default_type > 4 ? 0x10 : 0x01; - ioapic.flags = MPC_APIC_USABLE; - ioapic.apicaddr = 0xFEC00000; + ioapic.type = MP_IOAPIC; + ioapic.apicid = 2; + ioapic.apicver = mpc_default_type > 4 ? 0x10 : 0x01; + ioapic.flags = MPC_APIC_USABLE; + ioapic.apicaddr = IO_APIC_DEFAULT_PHYS_BASE; MP_ioapic_info(&ioapic); /* diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c index 98fd6cd4e3a..7dd95009417 100644 --- a/arch/x86/kernel/msr.c +++ b/arch/x86/kernel/msr.c @@ -1,6 +1,7 @@ /* ----------------------------------------------------------------------- * * * Copyright 2000-2008 H. Peter Anvin - All Rights Reserved + * Copyright 2009 Intel Corporation; author: H. Peter Anvin * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -80,11 +81,8 @@ static ssize_t msr_read(struct file *file, char __user *buf, for (; count; count -= 8) { err = rdmsr_safe_on_cpu(cpu, reg, &data[0], &data[1]); - if (err) { - if (err == -EFAULT) /* Fix idiotic error code */ - err = -EIO; + if (err) break; - } if (copy_to_user(tmp, &data, 8)) { err = -EFAULT; break; @@ -115,11 +113,8 @@ static ssize_t msr_write(struct file *file, const char __user *buf, break; } err = wrmsr_safe_on_cpu(cpu, reg, data[0], data[1]); - if (err) { - if (err == -EFAULT) /* Fix idiotic error code */ - err = -EIO; + if (err) break; - } tmp += 2; bytes += 8; } @@ -127,6 +122,54 @@ static ssize_t msr_write(struct file *file, const char __user *buf, return bytes ? bytes : err; } +static long msr_ioctl(struct file *file, unsigned int ioc, unsigned long arg) +{ + u32 __user *uregs = (u32 __user *)arg; + u32 regs[8]; + int cpu = iminor(file->f_path.dentry->d_inode); + int err; + + switch (ioc) { + case X86_IOC_RDMSR_REGS: + if (!(file->f_mode & FMODE_READ)) { + err = -EBADF; + break; + } + if (copy_from_user(®s, uregs, sizeof regs)) { + err = -EFAULT; + break; + } + err = rdmsr_safe_regs_on_cpu(cpu, regs); + if (err) + break; + if (copy_to_user(uregs, ®s, sizeof regs)) + err = -EFAULT; + break; + + case X86_IOC_WRMSR_REGS: + if (!(file->f_mode & FMODE_WRITE)) { + err = -EBADF; + break; + } + if (copy_from_user(®s, uregs, sizeof regs)) { + err = -EFAULT; + break; + } + err = wrmsr_safe_regs_on_cpu(cpu, regs); + if (err) + break; + if (copy_to_user(uregs, ®s, sizeof regs)) + err = -EFAULT; + break; + + default: + err = -ENOTTY; + break; + } + + return err; +} + static int msr_open(struct inode *inode, struct file *file) { unsigned int cpu = iminor(file->f_path.dentry->d_inode); @@ -157,6 +200,8 @@ static const struct file_operations msr_fops = { .read = msr_read, .write = msr_write, .open = msr_open, + .unlocked_ioctl = msr_ioctl, + .compat_ioctl = msr_ioctl, }; static int __cpuinit msr_device_create(int cpu) diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 70ec9b951d7..f5b0b4a01fb 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -362,8 +362,9 @@ struct pv_cpu_ops pv_cpu_ops = { #endif .wbinvd = native_wbinvd, .read_msr = native_read_msr_safe, - .read_msr_amd = native_read_msr_amd_safe, + .rdmsr_regs = native_rdmsr_safe_regs, .write_msr = native_write_msr_safe, + .wrmsr_regs = native_wrmsr_safe_regs, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, .read_tscp = native_read_tscp, diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 1a041bcf506..d71c8655905 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -3,6 +3,7 @@ #include <linux/dmar.h> #include <linux/bootmem.h> #include <linux/pci.h> +#include <linux/kmemleak.h> #include <asm/proto.h> #include <asm/dma.h> @@ -32,7 +33,14 @@ int no_iommu __read_mostly; /* Set this to 1 if there is a HW IOMMU in the system */ int iommu_detected __read_mostly = 0; -int iommu_pass_through; +/* + * This variable becomes 1 if iommu=pt is passed on the kernel command line. + * If this variable is 1, IOMMU implementations do no DMA ranslation for + * devices and allow every device to access to whole physical memory. This is + * useful if a user want to use an IOMMU only for KVM device assignment to + * guests and not for driver dma translation. + */ +int iommu_pass_through __read_mostly; dma_addr_t bad_dma_address __read_mostly = 0; EXPORT_SYMBOL(bad_dma_address); @@ -88,6 +96,11 @@ void __init dma32_reserve_bootmem(void) size = roundup(dma32_bootmem_size, align); dma32_bootmem_ptr = __alloc_bootmem_nopanic(size, align, 512ULL<<20); + /* + * Kmemleak should not scan this block as it may not be mapped via the + * kernel direct mapping. + */ + kmemleak_ignore(dma32_bootmem_ptr); if (dma32_bootmem_ptr) dma32_bootmem_size = size; else @@ -147,7 +160,7 @@ again: return NULL; addr = page_to_phys(page); - if (!is_buffer_dma_capable(dma_mask, addr, size)) { + if (addr + size > dma_mask) { __free_pages(page, get_order(size)); if (dma_mask < DMA_BIT_MASK(32) && !(flag & GFP_DMA)) { diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c index d2e56b8f48e..98a827ee9ed 100644 --- a/arch/x86/kernel/pci-gart_64.c +++ b/arch/x86/kernel/pci-gart_64.c @@ -190,14 +190,13 @@ static void iommu_full(struct device *dev, size_t size, int dir) static inline int need_iommu(struct device *dev, unsigned long addr, size_t size) { - return force_iommu || - !is_buffer_dma_capable(*dev->dma_mask, addr, size); + return force_iommu || !dma_capable(dev, addr, size); } static inline int nonforced_iommu(struct device *dev, unsigned long addr, size_t size) { - return !is_buffer_dma_capable(*dev->dma_mask, addr, size); + return !dma_capable(dev, addr, size); } /* Map a single continuous physical area into the IOMMU. diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c index 71d412a09f3..a3933d4330c 100644 --- a/arch/x86/kernel/pci-nommu.c +++ b/arch/x86/kernel/pci-nommu.c @@ -14,7 +14,7 @@ static int check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size) { - if (hwdev && !is_buffer_dma_capable(*hwdev->dma_mask, bus, size)) { + if (hwdev && !dma_capable(hwdev, bus, size)) { if (*hwdev->dma_mask >= DMA_BIT_MASK(32)) printk(KERN_ERR "nommu_%s: overflow %Lx+%zu of device mask %Lx\n", @@ -79,12 +79,29 @@ static void nommu_free_coherent(struct device *dev, size_t size, void *vaddr, free_pages((unsigned long)vaddr, get_order(size)); } +static void nommu_sync_single_for_device(struct device *dev, + dma_addr_t addr, size_t size, + enum dma_data_direction dir) +{ + flush_write_buffers(); +} + + +static void nommu_sync_sg_for_device(struct device *dev, + struct scatterlist *sg, int nelems, + enum dma_data_direction dir) +{ + flush_write_buffers(); +} + struct dma_map_ops nommu_dma_ops = { - .alloc_coherent = dma_generic_alloc_coherent, - .free_coherent = nommu_free_coherent, - .map_sg = nommu_map_sg, - .map_page = nommu_map_page, - .is_phys = 1, + .alloc_coherent = dma_generic_alloc_coherent, + .free_coherent = nommu_free_coherent, + .map_sg = nommu_map_sg, + .map_page = nommu_map_page, + .sync_single_for_device = nommu_sync_single_for_device, + .sync_sg_for_device = nommu_sync_sg_for_device, + .is_phys = 1, }; void __init no_iommu_init(void) diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c index 6af96ee4420..e8a35016115 100644 --- a/arch/x86/kernel/pci-swiotlb.c +++ b/arch/x86/kernel/pci-swiotlb.c @@ -13,31 +13,6 @@ int swiotlb __read_mostly; -void * __init swiotlb_alloc_boot(size_t size, unsigned long nslabs) -{ - return alloc_bootmem_low_pages(size); -} - -void *swiotlb_alloc(unsigned order, unsigned long nslabs) -{ - return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order); -} - -dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr) -{ - return paddr; -} - -phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr) -{ - return baddr; -} - -int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size) -{ - return 0; -} - static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t *dma_handle, gfp_t flags) { diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 00a8fe4c58b..209e7480176 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -63,9 +63,6 @@ asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); -DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task; -EXPORT_PER_CPU_SYMBOL(current_task); - /* * Return saved PC of a blocked thread. */ @@ -361,14 +358,21 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) *next = &next_p->thread; int cpu = smp_processor_id(); struct tss_struct *tss = &per_cpu(init_tss, cpu); + bool preload_fpu; /* never put a printk in __switch_to... printk() calls wake_up*() indirectly */ - __unlazy_fpu(prev_p); + /* + * If the task has used fpu the last 5 timeslices, just do a full + * restore of the math state immediately to avoid the trap; the + * chances of needing FPU soon are obviously high now + */ + preload_fpu = tsk_used_math(next_p) && next_p->fpu_counter > 5; + __unlazy_fpu(prev_p); /* we're going to use this soon, after a few expensive things */ - if (next_p->fpu_counter > 5) + if (preload_fpu) prefetch(next->xstate); /* @@ -409,6 +413,11 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT)) __switch_to_xtra(prev_p, next_p, tss); + /* If we're going to preload the fpu context, make sure clts + is run while we're batching the cpu state updates. */ + if (preload_fpu) + clts(); + /* * Leave lazy mode, flushing any hypercalls made here. * This must be done before restoring TLS segments so @@ -418,15 +427,8 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) */ arch_end_context_switch(next_p); - /* If the task has used fpu the last 5 timeslices, just do a full - * restore of the math state immediately to avoid the trap; the - * chances of needing FPU soon are obviously high now - * - * tsk_used_math() checks prevent calling math_state_restore(), - * which can sleep in the case of !tsk_used_math() - */ - if (tsk_used_math(next_p) && next_p->fpu_counter > 5) - math_state_restore(); + if (preload_fpu) + __math_state_restore(); /* * Restore %gs if needed (which is common) diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 89c46f1259d..72edac026a7 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -57,9 +57,6 @@ asmlinkage extern void ret_from_fork(void); -DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task; -EXPORT_PER_CPU_SYMBOL(current_task); - DEFINE_PER_CPU(unsigned long, old_rsp); static DEFINE_PER_CPU(unsigned char, is_idle); @@ -399,9 +396,17 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) int cpu = smp_processor_id(); struct tss_struct *tss = &per_cpu(init_tss, cpu); unsigned fsindex, gsindex; + bool preload_fpu; + + /* + * If the task has used fpu the last 5 timeslices, just do a full + * restore of the math state immediately to avoid the trap; the + * chances of needing FPU soon are obviously high now + */ + preload_fpu = tsk_used_math(next_p) && next_p->fpu_counter > 5; /* we're going to use this soon, after a few expensive things */ - if (next_p->fpu_counter > 5) + if (preload_fpu) prefetch(next->xstate); /* @@ -432,6 +437,13 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) load_TLS(next, cpu); + /* Must be after DS reload */ + unlazy_fpu(prev_p); + + /* Make sure cpu is ready for new context */ + if (preload_fpu) + clts(); + /* * Leave lazy mode, flushing any hypercalls made here. * This must be done before restoring TLS segments so @@ -472,9 +484,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) wrmsrl(MSR_KERNEL_GS_BASE, next->gs); prev->gsindex = gsindex; - /* Must be after DS reload */ - unlazy_fpu(prev_p); - /* * Switch the PDA and FPU contexts. */ @@ -493,15 +502,12 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) task_thread_info(prev_p)->flags & _TIF_WORK_CTXSW_PREV)) __switch_to_xtra(prev_p, next_p, tss); - /* If the task has used fpu the last 5 timeslices, just do a full - * restore of the math state immediately to avoid the trap; the - * chances of needing FPU soon are obviously high now - * - * tsk_used_math() checks prevent calling math_state_restore(), - * which can sleep in the case of !tsk_used_math() + /* + * Preload the FPU context, now that we've determined that the + * task is likely to be using it. */ - if (tsk_used_math(next_p) && next_p->fpu_counter > 5) - math_state_restore(); + if (preload_fpu) + __math_state_restore(); /* * There's a problem with moving the arch_install_thread_hw_breakpoint() * call before current is updated. Suppose a kernel breakpoint is diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index 0f89a4f20db..baaf8052f35 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -860,6 +860,8 @@ do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags) if (thread_info_flags & _TIF_NOTIFY_RESUME) { clear_thread_flag(TIF_NOTIFY_RESUME); tracehook_notify_resume(regs); + if (current->replacement_session_keyring) + key_replace_session_keyring(); } #ifdef CONFIG_X86_32 diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index dee0f3d814a..ec7b64c2df8 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -436,7 +436,8 @@ const struct cpumask *cpu_coregroup_mask(int cpu) * For perf, we return last level cache shared map. * And for power savings, we return cpu_core_map */ - if (sched_mc_power_savings || sched_smt_power_savings) + if ((sched_mc_power_savings || sched_smt_power_savings) && + !(cpu_has(c, X86_FEATURE_AMD_DCM))) return cpu_core_mask(cpu); else return c->llc_shared_map; diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c index e8b9863ef8c..3149032ff10 100644 --- a/arch/x86/kernel/step.c +++ b/arch/x86/kernel/step.c @@ -4,6 +4,7 @@ #include <linux/sched.h> #include <linux/mm.h> #include <linux/ptrace.h> +#include <asm/desc.h> unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs) { @@ -23,7 +24,7 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re * and APM bios ones we just ignore here. */ if ((seg & SEGMENT_TI_MASK) == SEGMENT_LDT) { - u32 *desc; + struct desc_struct *desc; unsigned long base; seg &= ~7UL; @@ -33,12 +34,10 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re addr = -1L; /* bogus selector, access would fault */ else { desc = child->mm->context.ldt + seg; - base = ((desc[0] >> 16) | - ((desc[1] & 0xff) << 16) | - (desc[1] & 0xff000000)); + base = get_desc_base(desc); /* 16-bit code segment? */ - if (!((desc[1] >> 22) & 1)) + if (!desc->d) addr &= 0xffff; addr += base; } diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c index 77b9689f8ed..503c1f2e883 100644 --- a/arch/x86/kernel/tlb_uv.c +++ b/arch/x86/kernel/tlb_uv.c @@ -640,13 +640,13 @@ static int __init uv_ptc_init(void) if (!is_uv_system()) return 0; - proc_uv_ptc = create_proc_entry(UV_PTC_BASENAME, 0444, NULL); + proc_uv_ptc = proc_create(UV_PTC_BASENAME, 0444, NULL, + &proc_uv_ptc_operations); if (!proc_uv_ptc) { printk(KERN_ERR "unable to create %s proc entry\n", UV_PTC_BASENAME); return -EINVAL; } - proc_uv_ptc->proc_fops = &proc_uv_ptc_operations; return 0; } diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index ae04589a579..49a401b1d4d 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -76,7 +76,7 @@ char ignore_fpu_irq; * F0 0F bug workaround.. We have a special link segment * for this. */ -gate_desc idt_table[256] +gate_desc idt_table[NR_VECTORS] __attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, }; #endif @@ -765,33 +765,34 @@ do_spurious_interrupt_bug(struct pt_regs *regs, long error_code) #endif } -#ifdef CONFIG_X86_32 -unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp) +asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void) { - struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id()); - unsigned long base = (kesp - uesp) & -THREAD_SIZE; - unsigned long new_kesp = kesp - base; - unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT; - __u64 desc = *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS]; - - /* Set up base for espfix segment */ - desc &= 0x00f0ff0000000000ULL; - desc |= ((((__u64)base) << 16) & 0x000000ffffff0000ULL) | - ((((__u64)base) << 32) & 0xff00000000000000ULL) | - ((((__u64)lim_pages) << 32) & 0x000f000000000000ULL) | - (lim_pages & 0xffff); - *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS] = desc; - - return new_kesp; } -#endif -asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void) +asmlinkage void __attribute__((weak)) smp_threshold_interrupt(void) { } -asmlinkage void __attribute__((weak)) smp_threshold_interrupt(void) +/* + * __math_state_restore assumes that cr0.TS is already clear and the + * fpu state is all ready for use. Used during context switch. + */ +void __math_state_restore(void) { + struct thread_info *thread = current_thread_info(); + struct task_struct *tsk = thread->task; + + /* + * Paranoid restore. send a SIGSEGV if we fail to restore the state. + */ + if (unlikely(restore_fpu_checking(tsk))) { + stts(); + force_sig(SIGSEGV, tsk); + return; + } + + thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */ + tsk->fpu_counter++; } /* @@ -825,17 +826,8 @@ asmlinkage void math_state_restore(void) } clts(); /* Allow maths ops (or we recurse) */ - /* - * Paranoid restore. send a SIGSEGV if we fail to restore the state. - */ - if (unlikely(restore_fpu_checking(tsk))) { - stts(); - force_sig(SIGSEGV, tsk); - return; - } - thread->status |= TS_USEDFPU; /* So we fnsave on switch_to() */ - tsk->fpu_counter++; + __math_state_restore(); } EXPORT_SYMBOL_GPL(math_state_restore); |