diff options
Diffstat (limited to 'arch/ia64/kernel')
| -rw-r--r-- | arch/ia64/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/ia64/kernel/crash.c | 245 | ||||
| -rw-r--r-- | arch/ia64/kernel/efi.c | 65 | ||||
| -rw-r--r-- | arch/ia64/kernel/entry.S | 2 | ||||
| -rw-r--r-- | arch/ia64/kernel/iosapic.c | 21 | ||||
| -rw-r--r-- | arch/ia64/kernel/machine_kexec.c | 133 | ||||
| -rw-r--r-- | arch/ia64/kernel/mca.c | 5 | ||||
| -rw-r--r-- | arch/ia64/kernel/relocate_kernel.S | 334 | ||||
| -rw-r--r-- | arch/ia64/kernel/setup.c | 38 | ||||
| -rw-r--r-- | arch/ia64/kernel/smp.c | 28 |
10 files changed, 867 insertions, 5 deletions
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile index cfa099b04cd..8ae384eb535 100644 --- a/arch/ia64/kernel/Makefile +++ b/arch/ia64/kernel/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_IA64_CYCLONE) += cyclone.o obj-$(CONFIG_CPU_FREQ) += cpufreq/ obj-$(CONFIG_IA64_MCA_RECOVERY) += mca_recovery.o obj-$(CONFIG_KPROBES) += kprobes.o jprobes.o +obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o crash.o obj-$(CONFIG_IA64_UNCACHED_ALLOCATOR) += uncached.o obj-$(CONFIG_AUDIT) += audit.o obj-$(CONFIG_PCI_MSI) += msi_ia64.o diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c new file mode 100644 index 00000000000..0aabedf95da --- /dev/null +++ b/arch/ia64/kernel/crash.c @@ -0,0 +1,245 @@ +/* + * arch/ia64/kernel/crash.c + * + * Architecture specific (ia64) functions for kexec based crash dumps. + * + * Created by: Khalid Aziz <khalid.aziz@hp.com> + * Copyright (C) 2005 Hewlett-Packard Development Company, L.P. + * Copyright (C) 2005 Intel Corp Zou Nan hai <nanhai.zou@intel.com> + * + */ +#include <linux/smp.h> +#include <linux/delay.h> +#include <linux/crash_dump.h> +#include <linux/bootmem.h> +#include <linux/kexec.h> +#include <linux/elfcore.h> +#include <linux/sysctl.h> +#include <linux/init.h> + +#include <asm/kdebug.h> +#include <asm/mca.h> +#include <asm/uaccess.h> + +int kdump_status[NR_CPUS]; +atomic_t kdump_cpu_freezed; +atomic_t kdump_in_progress; +int kdump_on_init = 1; +ssize_t +copy_oldmem_page(unsigned long pfn, char *buf, + size_t csize, unsigned long offset, int userbuf) +{ + void *vaddr; + + if (!csize) + return 0; + vaddr = __va(pfn<<PAGE_SHIFT); + if (userbuf) { + if (copy_to_user(buf, (vaddr + offset), csize)) { + return -EFAULT; + } + } else + memcpy(buf, (vaddr + offset), csize); + return csize; +} + +static inline Elf64_Word +*append_elf_note(Elf64_Word *buf, char *name, unsigned type, void *data, + size_t data_len) +{ + struct elf_note *note = (struct elf_note *)buf; + note->n_namesz = strlen(name) + 1; + note->n_descsz = data_len; + note->n_type = type; + buf += (sizeof(*note) + 3)/4; + memcpy(buf, name, note->n_namesz); + buf += (note->n_namesz + 3)/4; + memcpy(buf, data, data_len); + buf += (data_len + 3)/4; + return buf; +} + +static void +final_note(void *buf) +{ + memset(buf, 0, sizeof(struct elf_note)); +} + +extern void ia64_dump_cpu_regs(void *); + +static DEFINE_PER_CPU(struct elf_prstatus, elf_prstatus); + +void +crash_save_this_cpu() +{ + void *buf; + unsigned long cfm, sof, sol; + + int cpu = smp_processor_id(); + struct elf_prstatus *prstatus = &per_cpu(elf_prstatus, cpu); + + elf_greg_t *dst = (elf_greg_t *)&(prstatus->pr_reg); + memset(prstatus, 0, sizeof(*prstatus)); + prstatus->pr_pid = current->pid; + + ia64_dump_cpu_regs(dst); + cfm = dst[43]; + sol = (cfm >> 7) & 0x7f; + sof = cfm & 0x7f; + dst[46] = (unsigned long)ia64_rse_skip_regs((unsigned long *)dst[46], + sof - sol); + + buf = (u64 *) per_cpu_ptr(crash_notes, cpu); + if (!buf) + return; + buf = append_elf_note(buf, "CORE", NT_PRSTATUS, prstatus, + sizeof(*prstatus)); + final_note(buf); +} + +static int +kdump_wait_cpu_freeze(void) +{ + int cpu_num = num_online_cpus() - 1; + int timeout = 1000; + while(timeout-- > 0) { + if (atomic_read(&kdump_cpu_freezed) == cpu_num) + return 0; + udelay(1000); + } + return 1; +} + +void +machine_crash_shutdown(struct pt_regs *pt) +{ + /* This function is only called after the system + * has paniced or is otherwise in a critical state. + * The minimum amount of code to allow a kexec'd kernel + * to run successfully needs to happen here. + * + * In practice this means shooting down the other cpus in + * an SMP system. + */ + kexec_disable_iosapic(); +#ifdef CONFIG_SMP + kdump_smp_send_stop(); + if (kdump_wait_cpu_freeze() && kdump_on_init) { + //not all cpu response to IPI, send INIT to freeze them + kdump_smp_send_init(); + } +#endif +} + +static void +machine_kdump_on_init(void) +{ + local_irq_disable(); + kexec_disable_iosapic(); + machine_kexec(ia64_kimage); +} + +void +kdump_cpu_freeze(struct unw_frame_info *info, void *arg) +{ + int cpuid; + local_irq_disable(); + cpuid = smp_processor_id(); + crash_save_this_cpu(); + current->thread.ksp = (__u64)info->sw - 16; + atomic_inc(&kdump_cpu_freezed); + kdump_status[cpuid] = 1; + mb(); + if (cpuid == 0) { + for (;;) + cpu_relax(); + } else + ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]); +} + +static int +kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data) +{ + struct ia64_mca_notify_die *nd; + struct die_args *args = data; + + if (!kdump_on_init) + return NOTIFY_DONE; + + if (val != DIE_INIT_MONARCH_ENTER && + val != DIE_INIT_SLAVE_ENTER && + val != DIE_MCA_RENDZVOUS_LEAVE && + val != DIE_MCA_MONARCH_LEAVE) + return NOTIFY_DONE; + + nd = (struct ia64_mca_notify_die *)args->err; + /* Reason code 1 means machine check rendezous*/ + if ((val == DIE_INIT_MONARCH_ENTER || DIE_INIT_SLAVE_ENTER) && + nd->sos->rv_rc == 1) + return NOTIFY_DONE; + + switch (val) { + case DIE_INIT_MONARCH_ENTER: + machine_kdump_on_init(); + break; + case DIE_INIT_SLAVE_ENTER: + unw_init_running(kdump_cpu_freeze, NULL); + break; + case DIE_MCA_RENDZVOUS_LEAVE: + if (atomic_read(&kdump_in_progress)) + unw_init_running(kdump_cpu_freeze, NULL); + break; + case DIE_MCA_MONARCH_LEAVE: + /* die_register->signr indicate if MCA is recoverable */ + if (!args->signr) + machine_kdump_on_init(); + break; + } + return NOTIFY_DONE; +} + +#ifdef CONFIG_SYSCTL +static ctl_table kdump_on_init_table[] = { + { + .ctl_name = CTL_UNNUMBERED, + .procname = "kdump_on_init", + .data = &kdump_on_init, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec, + }, + { .ctl_name = 0 } +}; + +static ctl_table sys_table[] = { + { + .ctl_name = CTL_KERN, + .procname = "kernel", + .mode = 0555, + .child = kdump_on_init_table, + }, + { .ctl_name = 0 } +}; +#endif + +static int +machine_crash_setup(void) +{ + char *from = strstr(saved_command_line, "elfcorehdr="); + static struct notifier_block kdump_init_notifier_nb = { + .notifier_call = kdump_init_notifier, + }; + int ret; + if (from) + elfcorehdr_addr = memparse(from+11, &from); + saved_max_pfn = (unsigned long)-1; + if((ret = register_die_notifier(&kdump_init_notifier_nb)) != 0) + return ret; +#ifdef CONFIG_SYSCTL + register_sysctl_table(sys_table, 0); +#endif + return 0; +} + +__initcall(machine_crash_setup); + diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index bb8770a177b..9b96e7dbaf6 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -26,6 +26,7 @@ #include <linux/types.h> #include <linux/time.h> #include <linux/efi.h> +#include <linux/kexec.h> #include <asm/io.h> #include <asm/kregs.h> @@ -41,7 +42,7 @@ extern efi_status_t efi_call_phys (void *, ...); struct efi efi; EXPORT_SYMBOL(efi); static efi_runtime_services_t *runtime; -static unsigned long mem_limit = ~0UL, max_addr = ~0UL; +static unsigned long mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL; #define efi_call_virt(f, args...) (*(f))(args) @@ -421,6 +422,8 @@ efi_init (void) mem_limit = memparse(cp + 4, &cp); } else if (memcmp(cp, "max_addr=", 9) == 0) { max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); + } else if (memcmp(cp, "min_addr=", 9) == 0) { + min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); } else { while (*cp != ' ' && *cp) ++cp; @@ -428,6 +431,8 @@ efi_init (void) ++cp; } } + if (min_addr != 0UL) + printk(KERN_INFO "Ignoring memory below %luMB\n", min_addr >> 20); if (max_addr != ~0UL) printk(KERN_INFO "Ignoring memory above %luMB\n", max_addr >> 20); @@ -894,7 +899,8 @@ find_memmap_space (void) as = max(contig_low, md->phys_addr); ae = min(contig_high, efi_md_end(md)); - /* keep within max_addr= command line arg */ + /* keep within max_addr= and min_addr= command line arg */ + as = max(as, min_addr); ae = min(ae, max_addr); if (ae <= as) continue; @@ -1004,7 +1010,8 @@ efi_memmap_init(unsigned long *s, unsigned long *e) } else ae = efi_md_end(md); - /* keep within max_addr= command line arg */ + /* keep within max_addr= and min_addr= command line arg */ + as = max(as, min_addr); ae = min(ae, max_addr); if (ae <= as) continue; @@ -1116,6 +1123,58 @@ efi_initialize_iomem_resources(struct resource *code_resource, */ insert_resource(res, code_resource); insert_resource(res, data_resource); +#ifdef CONFIG_KEXEC + insert_resource(res, &efi_memmap_res); + insert_resource(res, &boot_param_res); + if (crashk_res.end > crashk_res.start) + insert_resource(res, &crashk_res); +#endif } } } + +#ifdef CONFIG_KEXEC +/* find a block of memory aligned to 64M exclude reserved regions + rsvd_regions are sorted + */ +unsigned long +kdump_find_rsvd_region (unsigned long size, + struct rsvd_region *r, int n) +{ + int i; + u64 start, end; + u64 alignment = 1UL << _PAGE_SIZE_64M; + void *efi_map_start, *efi_map_end, *p; + efi_memory_desc_t *md; + u64 efi_desc_size; + + efi_map_start = __va(ia64_boot_param->efi_memmap); + efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; + efi_desc_size = ia64_boot_param->efi_memdesc_size; + + for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { + md = p; + if (!efi_wb(md)) + continue; + start = ALIGN(md->phys_addr, alignment); + end = efi_md_end(md); + for (i = 0; i < n; i++) { + if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { + if (__pa(r[i].start) > start + size) + return start; + start = ALIGN(__pa(r[i].end), alignment); + if (i < n-1 && __pa(r[i+1].start) < start + size) + continue; + else + break; + } + } + if (end > start + size) + return start; + } + + printk(KERN_WARNING "Cannot reserve 0x%lx byte of memory for crashdump\n", + size); + return ~0UL; +} +#endif diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S index 3390b7c5a63..15234ed3a34 100644 --- a/arch/ia64/kernel/entry.S +++ b/arch/ia64/kernel/entry.S @@ -1575,7 +1575,7 @@ sys_call_table: data8 sys_mq_timedreceive // 1265 data8 sys_mq_notify data8 sys_mq_getsetattr - data8 sys_ni_syscall // reserved for kexec_load + data8 sys_kexec_load data8 sys_ni_syscall // reserved for vserver data8 sys_waitid // 1270 data8 sys_add_key diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c index 60d64950e3c..0fc5fb7865c 100644 --- a/arch/ia64/kernel/iosapic.c +++ b/arch/ia64/kernel/iosapic.c @@ -288,6 +288,27 @@ nop (unsigned int irq) /* do nothing... */ } + +#ifdef CONFIG_KEXEC +void +kexec_disable_iosapic(void) +{ + struct iosapic_intr_info *info; + struct iosapic_rte_info *rte; + u8 vec = 0; + for (info = iosapic_intr_info; info < + iosapic_intr_info + IA64_NUM_VECTORS; ++info, ++vec) { + list_for_each_entry(rte, &info->rtes, + rte_list) { + iosapic_write(rte->addr, + IOSAPIC_RTE_LOW(rte->rte_index), + IOSAPIC_MASK|vec); + iosapic_eoi(rte->addr, vec); + } + } +} +#endif + static void mask_irq (unsigned int irq) { diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c new file mode 100644 index 00000000000..468233fa2ce --- /dev/null +++ b/arch/ia64/kernel/machine_kexec.c @@ -0,0 +1,133 @@ +/* + * arch/ia64/kernel/machine_kexec.c + * + * Handle transition of Linux booting another kernel + * Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P. + * Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com> + * Copyright (C) 2006 Intel Corp, Zou Nan hai <nanhai.zou@intel.com> + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#include <linux/mm.h> +#include <linux/kexec.h> +#include <linux/cpu.h> +#include <linux/irq.h> +#include <asm/mmu_context.h> +#include <asm/setup.h> +#include <asm/delay.h> +#include <asm/meminit.h> + +typedef void (*relocate_new_kernel_t)(unsigned long, unsigned long, + struct ia64_boot_param *, unsigned long); + +struct kimage *ia64_kimage; + +struct resource efi_memmap_res = { + .name = "EFI Memory Map", + .start = 0, + .end = 0, + .flags = IORESOURCE_BUSY | IORESOURCE_MEM +}; + +struct resource boot_param_res = { + .name = "Boot parameter", + .start = 0, + .end = 0, + .flags = IORESOURCE_BUSY | IORESOURCE_MEM +}; + + +/* + * Do what every setup is needed on image and the + * reboot code buffer to allow us to avoid allocations + * later. + */ +int machine_kexec_prepare(struct kimage *image) +{ + void *control_code_buffer; + const unsigned long *func; + + func = (unsigned long *)&relocate_new_kernel; + /* Pre-load control code buffer to minimize work in kexec path */ + control_code_buffer = page_address(image->control_code_page); + memcpy((void *)control_code_buffer, (const void *)func[0], + relocate_new_kernel_size); + flush_icache_range((unsigned long)control_code_buffer, + (unsigned long)control_code_buffer + relocate_new_kernel_size); + ia64_kimage = image; + + return 0; +} + +void machine_kexec_cleanup(struct kimage *image) +{ +} + +void machine_shutdown(void) +{ + int cpu; + + for_each_online_cpu(cpu) { + if (cpu != smp_processor_id()) + cpu_down(cpu); + } + kexec_disable_iosapic(); +} + +/* + * Do not allocate memory (or fail in any way) in machine_kexec(). + * We are past the point of no return, committed to rebooting now. + */ +extern void *efi_get_pal_addr(void); +static void ia64_machine_kexec(struct unw_frame_info *info, void *arg) +{ + struct kimage *image = arg; + relocate_new_kernel_t rnk; + void *pal_addr = efi_get_pal_addr(); + unsigned long code_addr = (unsigned long)page_address(image->control_code_page); + unsigned long vector; + int ii; + + if (image->type == KEXEC_TYPE_CRASH) { + crash_save_this_cpu(); + current->thread.ksp = (__u64)info->sw - 16; + } + + /* Interrupts aren't acceptable while we reboot */ + local_irq_disable(); + + /* Mask CMC and Performance Monitor interrupts */ + ia64_setreg(_IA64_REG_CR_PMV, 1 << 16); + ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16); + + /* Mask ITV and Local Redirect Registers */ + ia64_set_itv(1 << 16); + ia64_set_lrr0(1 << 16); + ia64_set_lrr1(1 << 16); + + /* terminate possible nested in-service interrupts */ + for (ii = 0; ii < 16; ii++) + ia64_eoi(); + + /* unmask TPR and clear any pending interrupts */ + ia64_setreg(_IA64_REG_CR_TPR, 0); + ia64_srlz_d(); + vector = ia64_get_ivr(); + while (vector != IA64_SPURIOUS_INT_VECTOR) { + ia64_eoi(); + vector = ia64_get_ivr(); + } + platform_kernel_launch_event(); + rnk = (relocate_new_kernel_t)&code_addr; + (*rnk)(image->head, image->start, ia64_boot_param, + GRANULEROUNDDOWN((unsigned long) pal_addr)); + BUG(); +} + +void machine_kexec(struct kimage *image) +{ + unw_init_running(ia64_machine_kexec, image); + for(;;); +} diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 6bedd97570c..87c1c4f4287 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -82,6 +82,7 @@ #include <asm/system.h> #include <asm/sal.h> #include <asm/mca.h> +#include <asm/kexec.h> #include <asm/irq.h> #include <asm/hw_irq.h> @@ -1238,6 +1239,10 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw, } else { /* Dump buffered message to console */ ia64_mlogbuf_finish(1); +#ifdef CONFIG_CRASH_DUMP + atomic_set(&kdump_in_progress, 1); + monarch_cpu = -1; +#endif } if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover) == NOTIFY_STOP) diff --git a/arch/ia64/kernel/relocate_kernel.S b/arch/ia64/kernel/relocate_kernel.S new file mode 100644 index 00000000000..ae473e3f2a0 --- /dev/null +++ b/arch/ia64/kernel/relocate_kernel.S @@ -0,0 +1,334 @@ +/* + * arch/ia64/kernel/relocate_kernel.S + * + * Relocate kexec'able kernel and start it + * + * Copyright (C) 2005 Hewlett-Packard Development Company, L.P. + * Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com> + * Copyright (C) 2005 Intel Corp, Zou Nan hai <nanhai.zou@intel.com> + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ +#include <asm/asmmacro.h> +#include <asm/kregs.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/mca_asm.h> + + /* Must be relocatable PIC code callable as a C function + */ +GLOBAL_ENTRY(relocate_new_kernel) + .prologue + alloc r31=ar.pfs,4,0,0,0 + .body +.reloc_entry: +{ + rsm psr.i| psr.ic + mov r2=ip +} + ;; +{ + flushrs // must be first insn in group + srlz.i +} + ;; + dep r2=0,r2,61,3 //to physical address + ;; + //first switch to physical mode + add r3=1f-.reloc_entry, r2 + movl r16 = IA64_PSR_AC|IA64_PSR_BN|IA64_PSR_IC + mov ar.rsc=0 // put RSE in enforced lazy mode + ;; + add sp=(memory_stack_end - 16 - .reloc_entry),r2 + add r8=(register_stack - .reloc_entry),r2 + ;; + mov r18=ar.rnat + mov ar.bspstore=r8 + ;; + mov cr.ipsr=r16 + mov cr.iip=r3 + mov cr.ifs=r0 + srlz.i + ;; + mov ar.rnat=r18 + rfi + ;; +1: + //physical mode code begin + mov b6=in1 + dep r28=0,in2,61,3 //to physical address + + // purge all TC entries +#define O(member) IA64_CPUINFO_##member##_OFFSET + GET_THIS_PADDR(r2, cpu_info) // load phys addr of cpu_info into r2 + ;; + addl r17=O(PTCE_STRIDE),r2 + addl r2=O(PTCE_BASE),r2 + ;; + ld8 r18=[r2],(O(PTCE_COUNT)-O(PTCE_BASE));; // r18=ptce_base + ld4 r19=[r2],4 // r19=ptce_count[0] + ld4 r21=[r17],4 // r21=ptce_stride[0] + ;; + ld4 r20=[r2] // r20=ptce_count[1] + ld4 r22=[r17] // r22=ptce_stride[1] + mov r24=r0 + ;; + adds r20=-1,r20 + ;; +#undef O +2: + cmp.ltu p6,p7=r24,r19 +(p7) br.cond.dpnt.few 4f + mov ar.lc=r20 +3: + ptc.e r18 + ;; + add r18=r22,r18 + br.cloop.sptk.few 3b + ;; + add r18=r21,r18 + add r24=1,r24 + ;; + br.sptk.few 2b +4: + srlz.i + ;; + //purge TR entry for kernel text and data + movl r16=KERNEL_START + mov r18=KERNEL_TR_PAGE_SHIFT<<2 + ;; + ptr.i r16, r18 + ptr.d r16, r18 + ;; + srlz.i + ;; + + // purge TR entry for percpu data + movl r16=PERCPU_ADDR + mov r18=PERCPU_PAGE_SHIFT<<2 + ;; + ptr.d r16,r18 + ;; + srlz.d + ;; + + // purge TR entry for pal code + mov r16=in3 + mov r18=IA64_GRANULE_SHIFT<<2 + ;; + ptr.i r16,r18 + ;; + srlz.i + ;; + + // purge TR entry for stack + mov r16=IA64_KR(CURRENT_STACK) + ;; + shl r16=r16,IA64_GRANULE_SHIFT + movl r19=PAGE_OFFSET + ;; + add r16=r19,r16 + mov r18=IA64_GRANULE_SHIFT<<2 + ;; + ptr.d r16,r18 + ;; + srlz.i + ;; + + //copy segments + movl r16=PAGE_MASK + mov r30=in0 // in0 is page_list + br.sptk.few .dest_page + ;; +.loop: + ld8 r30=[in0], 8;; +.dest_page: + tbit.z p0, p6=r30, 0;; // 0x1 dest page +(p6) and r17=r30, r16 +(p6) br.cond.sptk.few .loop;; + + tbit.z p0, p6=r30, 1;; // 0x2 indirect page +(p6) and in0=r30, r16 +(p6) br.cond.sptk.few .loop;; + + tbit.z p0, p6=r30, 2;; // 0x4 end flag +(p6) br.cond.sptk.few .end_loop;; + + tbit.z p6, p0=r30, 3;; // 0x8 source page +(p6) br.cond.sptk.few .loop + + and r18=r30, r16 + + // simple copy page, may optimize later + movl r14=PAGE_SIZE/8 - 1;; + mov ar.lc=r14;; +1: + ld8 r14=[r18], 8;; + st8 [r17]=r14;; + fc.i r17 + add r17=8, r17 + br.ctop.sptk.few 1b + br.sptk.few .loop + ;; + +.end_loop: + sync.i // for fc.i + ;; + srlz.i + ;; + srlz.d + ;; + br.call.sptk.many b0=b6;; + +.align 32 +memory_stack: + .fill 8192, 1, 0 +memory_stack_end: +register_stack: + .fill 8192, 1, 0 +register_stack_end: +relocate_new_kernel_end: +END(relocate_new_kernel) + +.global relocate_new_kernel_size +relocate_new_kernel_size: + data8 relocate_new_kernel_end - relocate_new_kernel + +GLOBAL_ENTRY(ia64_dump_cpu_regs) + .prologue + alloc loc0=ar.pfs,1,2,0,0 + .body + mov ar.rsc=0 // put RSE in enforced lazy mode + add loc1=4*8, in0 // save r4 and r5 first + ;; +{ + flushrs // flush dirty regs to backing store + srlz.i +} + st8 [loc1]=r4, 8 + ;; + st8 [loc1]=r5, 8 + ;; + add loc1=32*8, in0 + mov r4=ar.rnat + ;; + st8 [in0]=r0, 8 // r0 + st8 [loc1]=r4, 8 // rnat + mov r5=pr + ;; + st8 [in0]=r1, 8 // r1 + st8 [loc1]=r5, 8 // pr + mov r4=b0 + ;; + st8 [in0]=r2, 8 // r2 + st8 [loc1]=r4, 8 // b0 + mov r5=b1; + ;; + st8 [in0]=r3, 24 // r3 + st8 [loc1]=r5, 8 // b1 + mov r4=b2 + ;; + st8 [in0]=r6, 8 // r6 + st8 [loc1]=r4, 8 // b2 + mov r5=b3 + ;; + st8 [in0]=r7, 8 // r7 + st8 [loc1]=r5, 8 // b3 + mov r4=b4 + ;; + st8 [in0]=r8, 8 // r8 + st8 [loc1]=r4, 8 // b4 + mov r5=b5 + ;; + st8 [in0]=r9, 8 // r9 + st8 [loc1]=r5, 8 // b5 + mov r4=b6 + ;; + st8 [in0]=r10, 8 // r10 + st8 [loc1]=r5, 8 // b6 + mov r5=b7 + ;; + st8 [in0]=r11, 8 // r11 + st8 [loc1]=r5, 8 // b7 + mov r4=b0 + ;; + st8 [in0]=r12, 8 // r12 + st8 [loc1]=r4, 8 // ip + mov r5=loc0 + ;; + st8 [in0]=r13, 8 // r13 + extr.u r5=r5, 0, 38 // ar.pfs.pfm + mov r4=r0 // user mask + ;; + st8 [in0]=r14, 8 // r14 + st8 [loc1]=r5, 8 // cfm + ;; + st8 [in0]=r15, 8 // r15 + st8 [loc1]=r4, 8 // user mask + mov r5=ar.rsc + ;; + st8 [in0]=r16, 8 // r16 + st8 [loc1]=r5, 8 // ar.rsc + mov r4=ar.bsp + ;; + st8 [in0]=r17, 8 // r17 + st8 [loc1]=r4, 8 // ar.bsp + mov r5=ar.bspstore + ;; + st8 [in0]=r18, 8 // r18 + st8 [loc1]=r5, 8 // ar.bspstore + mov r4=ar.rnat + ;; + st8 [in0]=r19, 8 // r19 + st8 [loc1]=r4, 8 // ar.rnat + mov r5=ar.ccv + ;; + st8 [in0]=r20, 8 // r20 + st8 [loc1]=r5, 8 // ar.ccv + mov r4=ar.unat + ;; + st8 [in0]=r21, 8 // r21 + st8 [loc1]=r4, 8 // ar.unat + mov r5 = ar.fpsr + ;; + st8 [in0]=r22, 8 // r22 + st8 [loc1]=r5, 8 // ar.fpsr + mov r4 = ar.unat + ;; + st8 [in0]=r23, 8 // r23 + st8 [loc1]=r4, 8 // unat + mov r5 = ar.fpsr + ;; + st8 [in0]=r24, 8 // r24 + st8 [loc1]=r5, 8 // fpsr + mov r4 = ar.pfs + ;; + st8 [in0]=r25, 8 // r25 + st8 [loc1]=r4, 8 // ar.pfs + mov r5 = ar.lc + ;; + st8 [in0]=r26, 8 // r26 + st8 [loc1]=r5, 8 // ar.lc + mov r4 = ar.ec + ;; + st8 [in0]=r27, 8 // r27 + st8 [loc1]=r4, 8 // ar.ec + mov r5 = ar.csd + ;; + st8 [in0]=r28, 8 // r28 + st8 [loc1]=r5, 8 // ar.csd + mov r4 = ar.ssd + ;; + st8 [in0]=r29, 8 // r29 + st8 [loc1]=r4, 8 // ar.ssd + ;; + st8 [in0]=r30, 8 // r30 + ;; + st8 [in0]=r31, 8 // r31 + mov ar.pfs=loc0 + ;; + br.ret.sptk.many rp +END(ia64_dump_cpu_regs) + + diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index d10404a4175..14e1200376a 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -43,6 +43,8 @@ #include <linux/initrd.h> #include <linux/pm.h> #include <linux/cpufreq.h> +#include <linux/kexec.h> +#include <linux/crash_dump.h> #include <asm/ia32.h> #include <asm/machvec.h> @@ -252,6 +254,41 @@ reserve_memory (void) efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); n++; +#ifdef CONFIG_KEXEC + /* crashkernel=size@offset specifies the size to reserve for a crash + * kernel.(offset is ingored for keep compatibility with other archs) + * By reserving this memory we guarantee that linux never set's it + * up as a DMA target.Useful for holding code to do something + * appropriate after a kernel panic. + */ + { + char *from = strstr(saved_command_line, "crashkernel="); + unsigned long base, size; + if (from) { + size = memparse(from + 12, &from); + if (size) { + sort_regions(rsvd_region, n); + base = kdump_find_rsvd_region(size, + rsvd_region, n); + if (base != ~0UL) { + rsvd_region[n].start = + (unsigned long)__va(base); + rsvd_region[n].end = + (unsigned long)__va(base + size); + n++; + crashk_res.start = base; + crashk_res.end = base + size - 1; + } + } + } + efi_memmap_res.start = ia64_boot_param->efi_memmap; + efi_memmap_res.end = efi_memmap_res.start + + ia64_boot_param->efi_memmap_size; + boot_param_res.start = __pa(ia64_boot_param); + boot_param_res.end = boot_param_res.start + + sizeof(*ia64_boot_param); + } +#endif /* end of memory marker */ rsvd_region[n].start = ~0UL; rsvd_region[n].end = ~0UL; @@ -263,6 +300,7 @@ reserve_memory (void) sort_regions(rsvd_region, num_rsvd_regions); } + /** * find_initrd - get initrd parameters from the boot parameter structure * diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c index 6ab95ceaf9d..b1b9aa4364b 100644 --- a/arch/ia64/kernel/smp.c +++ b/arch/ia64/kernel/smp.c @@ -30,6 +30,7 @@ #include <linux/delay.h> #include <linux/efi.h> #include <linux/bitops.h> +#include <linux/kexec.h> #include <asm/atomic.h> #include <asm/current.h> @@ -66,6 +67,7 @@ static volatile struct call_data_struct *call_data; #define IPI_CALL_FUNC 0 #define IPI_CPU_STOP 1 +#define IPI_KDUMP_CPU_STOP 3 /* This needs to be cacheline aligned because it is written to by *other* CPUs. */ static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned; @@ -155,7 +157,11 @@ handle_IPI (int irq, void *dev_id) case IPI_CPU_STOP: stop_this_cpu(); break; - +#ifdef CONFIG_CRASH_DUMP + case IPI_KDUMP_CPU_STOP: + unw_init_running(kdump_cpu_freeze, NULL); + break; +#endif default: printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n", this_cpu, which); break; @@ -213,6 +219,26 @@ send_IPI_self (int op) send_IPI_single(smp_processor_id(), op); } +#ifdef CONFIG_CRASH_DUMP +void +kdump_smp_send_stop() +{ + send_IPI_allbutself(IPI_KDUMP_CPU_STOP); +} + +void +kdump_smp_send_init() +{ + unsigned int cpu, self_cpu; + self_cpu = smp_processor_id(); + for_each_online_cpu(cpu) { + if (cpu != self_cpu) { + if(kdump_status[cpu] == 0) + platform_send_ipi(cpu, 0, IA64_IPI_DM_INIT, 0); + } + } +} +#endif /* * Called with preeemption disabled. */ |