diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/Makefile_32 | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/Makefile_64 | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/crash.c (renamed from arch/x86/kernel/crash_32.c) | 11 | ||||
| -rw-r--r-- | arch/x86/kernel/crash_64.c | 135 |
4 files changed, 11 insertions, 139 deletions
diff --git a/arch/x86/kernel/Makefile_32 b/arch/x86/kernel/Makefile_32 index ccea590bbb9..b9d67982030 100644 --- a/arch/x86/kernel/Makefile_32 +++ b/arch/x86/kernel/Makefile_32 @@ -26,7 +26,7 @@ obj-$(CONFIG_X86_MPPARSE) += mpparse_32.o obj-$(CONFIG_X86_LOCAL_APIC) += apic_32.o nmi_32.o obj-$(CONFIG_X86_IO_APIC) += io_apic_32.o obj-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups_32.o -obj-$(CONFIG_KEXEC) += machine_kexec_32.o relocate_kernel_32.o crash_32.o +obj-$(CONFIG_KEXEC) += machine_kexec_32.o relocate_kernel_32.o crash.o obj-$(CONFIG_CRASH_DUMP) += crash_dump_32.o obj-$(CONFIG_X86_NUMAQ) += numaq_32.o obj-$(CONFIG_X86_SUMMIT_NUMA) += summit_32.o diff --git a/arch/x86/kernel/Makefile_64 b/arch/x86/kernel/Makefile_64 index dec06e76928..7b917d4cfbd 100644 --- a/arch/x86/kernel/Makefile_64 +++ b/arch/x86/kernel/Makefile_64 @@ -23,7 +23,7 @@ obj-$(CONFIG_X86_CPUID) += cpuid.o obj-$(CONFIG_SMP) += smp_64.o smpboot_64.o trampoline_64.o tsc_sync.o obj-y += apic_64.o nmi_64.o obj-y += io_apic_64.o mpparse_64.o genapic_64.o genapic_flat_64.o -obj-$(CONFIG_KEXEC) += machine_kexec_64.o relocate_kernel_64.o crash_64.o +obj-$(CONFIG_KEXEC) += machine_kexec_64.o relocate_kernel_64.o crash.o obj-$(CONFIG_CRASH_DUMP) += crash_dump_64.o obj-$(CONFIG_PM) += suspend_64.o obj-$(CONFIG_HIBERNATION) += suspend_asm_64.o diff --git a/arch/x86/kernel/crash_32.c b/arch/x86/kernel/crash.c index 53589d1b1a0..af0253f94a9 100644 --- a/arch/x86/kernel/crash_32.c +++ b/arch/x86/kernel/crash.c @@ -1,5 +1,5 @@ /* - * Architecture specific (i386) functions for kexec based crash dumps. + * Architecture specific (i386/x86_64) functions for kexec based crash dumps. * * Created by: Hariprasad Nellitheertha (hari@in.ibm.com) * @@ -25,8 +25,11 @@ #include <linux/kdebug.h> #include <asm/smp.h> +#ifdef X86_32 #include <mach_ipi.h> - +#else +#include <asm/mach_apic.h> +#endif /* This keeps a track of which one is crashing cpu. */ static int crashing_cpu; @@ -38,7 +41,9 @@ static int crash_nmi_callback(struct notifier_block *self, unsigned long val, void *data) { struct pt_regs *regs; +#ifdef X86_32 struct pt_regs fixed_regs; +#endif int cpu; if (val != DIE_NMI_IPI) @@ -55,10 +60,12 @@ static int crash_nmi_callback(struct notifier_block *self, return NOTIFY_STOP; local_irq_disable(); +#ifdef X86_32 if (!user_mode_vm(regs)) { crash_fixup_ss_esp(&fixed_regs, regs); regs = &fixed_regs; } +#endif crash_save_cpu(regs, cpu); disable_local_APIC(); atomic_dec(&waiting_for_crash_ipi); diff --git a/arch/x86/kernel/crash_64.c b/arch/x86/kernel/crash_64.c deleted file mode 100644 index 13432a1ae90..00000000000 --- a/arch/x86/kernel/crash_64.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * Architecture specific (x86_64) functions for kexec based crash dumps. - * - * Created by: Hariprasad Nellitheertha (hari@in.ibm.com) - * - * Copyright (C) IBM Corporation, 2004. All rights reserved. - * - */ - -#include <linux/init.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/smp.h> -#include <linux/irq.h> -#include <linux/reboot.h> -#include <linux/kexec.h> -#include <linux/delay.h> -#include <linux/elf.h> -#include <linux/elfcore.h> -#include <linux/kdebug.h> - -#include <asm/processor.h> -#include <asm/hardirq.h> -#include <asm/nmi.h> -#include <asm/hw_irq.h> -#include <asm/mach_apic.h> - -/* This keeps a track of which one is crashing cpu. */ -static int crashing_cpu; - -#ifdef CONFIG_SMP -static atomic_t waiting_for_crash_ipi; - -static int crash_nmi_callback(struct notifier_block *self, - unsigned long val, void *data) -{ - struct pt_regs *regs; - int cpu; - - if (val != DIE_NMI_IPI) - return NOTIFY_OK; - - regs = ((struct die_args *)data)->regs; - cpu = raw_smp_processor_id(); - - /* - * Don't do anything if this handler is invoked on crashing cpu. - * Otherwise, system will completely hang. Crashing cpu can get - * an NMI if system was initially booted with nmi_watchdog parameter. - */ - if (cpu == crashing_cpu) - return NOTIFY_STOP; - local_irq_disable(); - - crash_save_cpu(regs, cpu); - disable_local_APIC(); - atomic_dec(&waiting_for_crash_ipi); - /* Assume hlt works */ - for(;;) - halt(); - - return 1; -} - -static void smp_send_nmi_allbutself(void) -{ - send_IPI_allbutself(NMI_VECTOR); -} - -/* - * This code is a best effort heuristic to get the - * other cpus to stop executing. So races with - * cpu hotplug shouldn't matter. - */ - -static struct notifier_block crash_nmi_nb = { - .notifier_call = crash_nmi_callback, -}; - -static void nmi_shootdown_cpus(void) -{ - unsigned long msecs; - - atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1); - if (register_die_notifier(&crash_nmi_nb)) - return; /* return what? */ - - /* - * Ensure the new callback function is set before sending - * out the NMI - */ - wmb(); - - smp_send_nmi_allbutself(); - - msecs = 1000; /* Wait at most a second for the other cpus to stop */ - while ((atomic_read(&waiting_for_crash_ipi) > 0) && msecs) { - mdelay(1); - msecs--; - } - /* Leave the nmi callback set */ - disable_local_APIC(); -} -#else -static void nmi_shootdown_cpus(void) -{ - /* There are no cpus to shootdown */ -} -#endif - -void machine_crash_shutdown(struct pt_regs *regs) -{ - /* - * This function is only called after the system - * has panicked 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. - */ - /* The kernel is broken so disable interrupts */ - local_irq_disable(); - - /* Make a note of crashing cpu. Will be used in NMI callback.*/ - crashing_cpu = smp_processor_id(); - nmi_shootdown_cpus(); - - if(cpu_has_apic) - disable_local_APIC(); - - disable_IO_APIC(); - - crash_save_cpu(regs, smp_processor_id()); -} |