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| author | Eduardo Habkost <ehabkost@redhat.com> | 2008-11-12 11:34:37 -0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-12 18:55:43 +0100 |
| commit | a7d41820f683c35b53af719210a51f6aa0f86a6a (patch) | |
| tree | f1e8a8cff89623990e371bdeda0dda6f27a97fbd /arch/x86/kernel/crash.c | |
| parent | eb42c75878e4d13941dcbcf2ef1027c257b099a6 (diff) | |
| download | linux-a7d41820f683c35b53af719210a51f6aa0f86a6a.tar.gz | |
x86 kdump: extract kdump-specific code from crash_nmi_callback()
Impact: cleanup The NMI CPU-halting code will be used on non-kdump cases, also (e.g. emergency_reboot when virtualization is enabled). Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/crash.c')
| -rw-r--r-- | arch/x86/kernel/crash.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index 268553817909..60475422a51a 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -35,19 +35,34 @@ static int crashing_cpu; #if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC) static atomic_t waiting_for_crash_ipi; -static int crash_nmi_callback(struct notifier_block *self, - unsigned long val, void *data) +static void kdump_nmi_callback(int cpu, struct die_args *args) { struct pt_regs *regs; #ifdef CONFIG_X86_32 struct pt_regs fixed_regs; #endif + + regs = args->regs; + +#ifdef CONFIG_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(); +} + +static int crash_nmi_callback(struct notifier_block *self, + unsigned long val, void *data) +{ 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. @@ -58,14 +73,8 @@ static int crash_nmi_callback(struct notifier_block *self, return NOTIFY_STOP; local_irq_disable(); -#ifdef CONFIG_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(); + kdump_nmi_callback(cpu, (struct die_args *)data); + atomic_dec(&waiting_for_crash_ipi); /* Assume hlt works */ halt(); |