diff options
Diffstat (limited to 'arch/x86_64/kernel')
| -rw-r--r-- | arch/x86_64/kernel/head.S | 40 | ||||
| -rw-r--r-- | arch/x86_64/kernel/kprobes.c | 8 | ||||
| -rw-r--r-- | arch/x86_64/kernel/mce.c | 10 | ||||
| -rw-r--r-- | arch/x86_64/kernel/setup.c | 27 | ||||
| -rw-r--r-- | arch/x86_64/kernel/setup64.c | 4 | ||||
| -rw-r--r-- | arch/x86_64/kernel/smpboot.c | 6 | ||||
| -rw-r--r-- | arch/x86_64/kernel/suspend.c | 127 | ||||
| -rw-r--r-- | arch/x86_64/kernel/suspend_asm.S | 17 |
8 files changed, 188 insertions, 51 deletions
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S index 4592bf21fca..b92e5f45ed4 100644 --- a/arch/x86_64/kernel/head.S +++ b/arch/x86_64/kernel/head.S @@ -270,26 +270,26 @@ ENTRY(level3_kernel_pgt) .org 0x4000 ENTRY(level2_ident_pgt) /* 40MB for bootup. */ - .quad 0x0000000000000183 - .quad 0x0000000000200183 - .quad 0x0000000000400183 - .quad 0x0000000000600183 - .quad 0x0000000000800183 - .quad 0x0000000000A00183 - .quad 0x0000000000C00183 - .quad 0x0000000000E00183 - .quad 0x0000000001000183 - .quad 0x0000000001200183 - .quad 0x0000000001400183 - .quad 0x0000000001600183 - .quad 0x0000000001800183 - .quad 0x0000000001A00183 - .quad 0x0000000001C00183 - .quad 0x0000000001E00183 - .quad 0x0000000002000183 - .quad 0x0000000002200183 - .quad 0x0000000002400183 - .quad 0x0000000002600183 + .quad 0x0000000000000083 + .quad 0x0000000000200083 + .quad 0x0000000000400083 + .quad 0x0000000000600083 + .quad 0x0000000000800083 + .quad 0x0000000000A00083 + .quad 0x0000000000C00083 + .quad 0x0000000000E00083 + .quad 0x0000000001000083 + .quad 0x0000000001200083 + .quad 0x0000000001400083 + .quad 0x0000000001600083 + .quad 0x0000000001800083 + .quad 0x0000000001A00083 + .quad 0x0000000001C00083 + .quad 0x0000000001E00083 + .quad 0x0000000002000083 + .quad 0x0000000002200083 + .quad 0x0000000002400083 + .quad 0x0000000002600083 /* Temporary mappings for the super early allocator in arch/x86_64/mm/init.c */ .globl temp_boot_pmds temp_boot_pmds: diff --git a/arch/x86_64/kernel/kprobes.c b/arch/x86_64/kernel/kprobes.c index df08c43276a..76a28b007be 100644 --- a/arch/x86_64/kernel/kprobes.c +++ b/arch/x86_64/kernel/kprobes.c @@ -77,9 +77,9 @@ static inline int is_IF_modifier(kprobe_opcode_t *insn) int __kprobes arch_prepare_kprobe(struct kprobe *p) { /* insn: must be on special executable page on x86_64. */ - up(&kprobe_mutex); - p->ainsn.insn = get_insn_slot(); down(&kprobe_mutex); + p->ainsn.insn = get_insn_slot(); + up(&kprobe_mutex); if (!p->ainsn.insn) { return -ENOMEM; } @@ -231,9 +231,9 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p) void __kprobes arch_remove_kprobe(struct kprobe *p) { - up(&kprobe_mutex); - free_insn_slot(p->ainsn.insn); down(&kprobe_mutex); + free_insn_slot(p->ainsn.insn); + up(&kprobe_mutex); } static inline void save_previous_kprobe(void) diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c index 08203b07f4b..69541db5ff2 100644 --- a/arch/x86_64/kernel/mce.c +++ b/arch/x86_64/kernel/mce.c @@ -54,9 +54,12 @@ void mce_log(struct mce *mce) { unsigned next, entry; mce->finished = 0; - smp_wmb(); + wmb(); for (;;) { entry = rcu_dereference(mcelog.next); + /* The rmb forces the compiler to reload next in each + iteration */ + rmb(); for (;;) { /* When the buffer fills up discard new entries. Assume that the earlier errors are the more interesting. */ @@ -69,6 +72,7 @@ void mce_log(struct mce *mce) entry++; continue; } + break; } smp_rmb(); next = entry + 1; @@ -76,9 +80,9 @@ void mce_log(struct mce *mce) break; } memcpy(mcelog.entry + entry, mce, sizeof(struct mce)); - smp_wmb(); + wmb(); mcelog.entry[entry].finished = 1; - smp_wmb(); + wmb(); if (!test_and_set_bit(0, &console_logged)) notify_user = 1; diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index 238f73e1a83..cb28df14ff6 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -831,8 +831,6 @@ static void __init amd_detect_cmp(struct cpuinfo_x86 *c) #endif } -#define HWCR 0xc0010015 - static int __init init_amd(struct cpuinfo_x86 *c) { int r; @@ -841,14 +839,18 @@ static int __init init_amd(struct cpuinfo_x86 *c) #ifdef CONFIG_SMP unsigned long value; - // Disable TLB flush filter by setting HWCR.FFDIS: - // bit 6 of msr C001_0015 - // - // Errata 63 for SH-B3 steppings - // Errata 122 for all(?) steppings - rdmsrl(HWCR, value); - value |= 1 << 6; - wrmsrl(HWCR, value); + /* + * Disable TLB flush filter by setting HWCR.FFDIS on K8 + * bit 6 of msr C001_0015 + * + * Errata 63 for SH-B3 steppings + * Errata 122 for all steppings (F+ have it disabled by default) + */ + if (c->x86 == 15) { + rdmsrl(MSR_K8_HWCR, value); + value |= 1 << 6; + wrmsrl(MSR_K8_HWCR, value); + } #endif /* Bit 31 in normal CPUID used for nonstandard 3DNow ID; @@ -965,13 +967,12 @@ static int __cpuinit intel_num_cpu_cores(struct cpuinfo_x86 *c) static void srat_detect_node(void) { #ifdef CONFIG_NUMA - unsigned apicid, node; + unsigned node; int cpu = smp_processor_id(); /* Don't do the funky fallback heuristics the AMD version employs for now. */ - apicid = phys_proc_id[cpu]; - node = apicid_to_node[apicid]; + node = apicid_to_node[hard_smp_processor_id()]; if (node == NUMA_NO_NODE) node = 0; cpu_to_node[cpu] = node; diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c index bd33be24a38..79190891fbc 100644 --- a/arch/x86_64/kernel/setup64.c +++ b/arch/x86_64/kernel/setup64.c @@ -87,6 +87,10 @@ void __init setup_per_cpu_areas(void) int i; unsigned long size; +#ifdef CONFIG_HOTPLUG_CPU + prefill_possible_map(); +#endif + /* Copy section for each CPU (we discard the original) */ size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES); #ifdef CONFIG_MODULES diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c index e12d7baeb33..658a81b33f3 100644 --- a/arch/x86_64/kernel/smpboot.c +++ b/arch/x86_64/kernel/smpboot.c @@ -892,7 +892,7 @@ static __init void disable_smp(void) * those NR_CPUS, hence cpu_possible_map represents entire NR_CPUS range. * - Ashok Raj */ -static void prefill_possible_map(void) +__init void prefill_possible_map(void) { int i; for (i = 0; i < NR_CPUS; i++) @@ -967,10 +967,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus) current_cpu_data = boot_cpu_data; current_thread_info()->cpu = 0; /* needed? */ -#ifdef CONFIG_HOTPLUG_CPU - prefill_possible_map(); -#endif - if (smp_sanity_check(max_cpus) < 0) { printk(KERN_INFO "SMP disabled\n"); disable_smp(); diff --git a/arch/x86_64/kernel/suspend.c b/arch/x86_64/kernel/suspend.c index ebb9abf3ce6..f066c6ab361 100644 --- a/arch/x86_64/kernel/suspend.c +++ b/arch/x86_64/kernel/suspend.c @@ -11,6 +11,8 @@ #include <linux/smp.h> #include <linux/suspend.h> #include <asm/proto.h> +#include <asm/page.h> +#include <asm/pgtable.h> struct saved_context saved_context; @@ -140,4 +142,129 @@ void fix_processor_context(void) } +#ifdef CONFIG_SOFTWARE_SUSPEND +/* Defined in arch/x86_64/kernel/suspend_asm.S */ +extern int restore_image(void); +pgd_t *temp_level4_pgt; + +static void **pages; + +static inline void *__add_page(void) +{ + void **c; + + c = (void **)get_usable_page(GFP_ATOMIC); + if (c) { + *c = pages; + pages = c; + } + return c; +} + +static inline void *__next_page(void) +{ + void **c; + + c = pages; + if (c) { + pages = *c; + *c = NULL; + } + return c; +} + +/* + * Try to allocate as many usable pages as needed and daisy chain them. + * If one allocation fails, free the pages allocated so far + */ +static int alloc_usable_pages(unsigned long n) +{ + void *p; + + pages = NULL; + do + if (!__add_page()) + break; + while (--n); + if (n) { + p = __next_page(); + while (p) { + free_page((unsigned long)p); + p = __next_page(); + } + return -ENOMEM; + } + return 0; +} + +static void res_phys_pud_init(pud_t *pud, unsigned long address, unsigned long end) +{ + long i, j; + + i = pud_index(address); + pud = pud + i; + for (; i < PTRS_PER_PUD; pud++, i++) { + unsigned long paddr; + pmd_t *pmd; + + paddr = address + i*PUD_SIZE; + if (paddr >= end) + break; + + pmd = (pmd_t *)__next_page(); + set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE)); + for (j = 0; j < PTRS_PER_PMD; pmd++, j++, paddr += PMD_SIZE) { + unsigned long pe; + + if (paddr >= end) + break; + pe = _PAGE_NX | _PAGE_PSE | _KERNPG_TABLE | paddr; + pe &= __supported_pte_mask; + set_pmd(pmd, __pmd(pe)); + } + } +} + +static void set_up_temporary_mappings(void) +{ + unsigned long start, end, next; + + temp_level4_pgt = (pgd_t *)__next_page(); + + /* It is safe to reuse the original kernel mapping */ + set_pgd(temp_level4_pgt + pgd_index(__START_KERNEL_map), + init_level4_pgt[pgd_index(__START_KERNEL_map)]); + + /* Set up the direct mapping from scratch */ + start = (unsigned long)pfn_to_kaddr(0); + end = (unsigned long)pfn_to_kaddr(end_pfn); + + for (; start < end; start = next) { + pud_t *pud = (pud_t *)__next_page(); + next = start + PGDIR_SIZE; + if (next > end) + next = end; + res_phys_pud_init(pud, __pa(start), __pa(next)); + set_pgd(temp_level4_pgt + pgd_index(start), + mk_kernel_pgd(__pa(pud))); + } +} + +int swsusp_arch_resume(void) +{ + unsigned long n; + + n = ((end_pfn << PAGE_SHIFT) + PUD_SIZE - 1) >> PUD_SHIFT; + n += (n + PTRS_PER_PUD - 1) / PTRS_PER_PUD + 1; + pr_debug("swsusp_arch_resume(): pages needed = %lu\n", n); + if (alloc_usable_pages(n)) { + free_eaten_memory(); + return -ENOMEM; + } + /* We have got enough memory and from now on we cannot recover */ + set_up_temporary_mappings(); + restore_image(); + return 0; +} +#endif /* CONFIG_SOFTWARE_SUSPEND */ diff --git a/arch/x86_64/kernel/suspend_asm.S b/arch/x86_64/kernel/suspend_asm.S index 4d659e97df1..320b6fb00cc 100644 --- a/arch/x86_64/kernel/suspend_asm.S +++ b/arch/x86_64/kernel/suspend_asm.S @@ -39,12 +39,13 @@ ENTRY(swsusp_arch_suspend) call swsusp_save ret -ENTRY(swsusp_arch_resume) - /* set up cr3 */ - leaq init_level4_pgt(%rip),%rax - subq $__START_KERNEL_map,%rax - movq %rax,%cr3 - +ENTRY(restore_image) + /* switch to temporary page tables */ + movq $__PAGE_OFFSET, %rdx + movq temp_level4_pgt(%rip), %rax + subq %rdx, %rax + movq %rax, %cr3 + /* Flush TLB */ movq mmu_cr4_features(%rip), %rax movq %rax, %rdx andq $~(1<<7), %rdx # PGE @@ -69,6 +70,10 @@ loop: movq pbe_next(%rdx), %rdx jmp loop done: + /* go back to the original page tables */ + leaq init_level4_pgt(%rip), %rax + subq $__START_KERNEL_map, %rax + movq %rax, %cr3 /* Flush TLB, including "global" things (vmalloc) */ movq mmu_cr4_features(%rip), %rax movq %rax, %rdx |