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| author | Ingo Molnar <mingo@elte.hu> | 2011-12-18 09:18:45 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-12-18 09:18:45 +0100 |
| commit | a228b5892b0527b8574c06edc72cacaf8c25418d (patch) | |
| tree | 0b70c47c07fad1a18301e63be52e8252d16c0af5 /arch | |
| parent | Merge branch 'early-mce-decode' of git://git.kernel.org/pub/scm/linux/kernel/... (diff) | |
| parent | x86: add IRQ context simulation in module mce-inject (diff) | |
| download | linux-a228b5892b0527b8574c06edc72cacaf8c25418d.tar.xz linux-a228b5892b0527b8574c06edc72cacaf8c25418d.zip | |
Merge branch 'mce-inject' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/mce
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/mce.h | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mcheck/mce-inject.c | 34 |
2 files changed, 35 insertions, 8 deletions
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index b7c47a468fde..6add827381c9 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -50,10 +50,11 @@ #define MCJ_CTX_MASK 3 #define MCJ_CTX(flags) ((flags) & MCJ_CTX_MASK) #define MCJ_CTX_RANDOM 0 /* inject context: random */ -#define MCJ_CTX_PROCESS 1 /* inject context: process */ -#define MCJ_CTX_IRQ 2 /* inject context: IRQ */ -#define MCJ_NMI_BROADCAST 4 /* do NMI broadcasting */ -#define MCJ_EXCEPTION 8 /* raise as exception */ +#define MCJ_CTX_PROCESS 0x1 /* inject context: process */ +#define MCJ_CTX_IRQ 0x2 /* inject context: IRQ */ +#define MCJ_NMI_BROADCAST 0x4 /* do NMI broadcasting */ +#define MCJ_EXCEPTION 0x8 /* raise as exception */ +#define MCJ_IRQ_BRAODCAST 0x10 /* do IRQ broadcasting */ /* Fields are zero when not available */ struct mce { diff --git a/arch/x86/kernel/cpu/mcheck/mce-inject.c b/arch/x86/kernel/cpu/mcheck/mce-inject.c index 319882ef848d..fc4beb393577 100644 --- a/arch/x86/kernel/cpu/mcheck/mce-inject.c +++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c @@ -17,6 +17,7 @@ #include <linux/kernel.h> #include <linux/string.h> #include <linux/fs.h> +#include <linux/preempt.h> #include <linux/smp.h> #include <linux/notifier.h> #include <linux/kdebug.h> @@ -92,6 +93,18 @@ static int mce_raise_notify(unsigned int cmd, struct pt_regs *regs) return NMI_HANDLED; } +static void mce_irq_ipi(void *info) +{ + int cpu = smp_processor_id(); + struct mce *m = &__get_cpu_var(injectm); + + if (cpumask_test_cpu(cpu, mce_inject_cpumask) && + m->inject_flags & MCJ_EXCEPTION) { + cpumask_clear_cpu(cpu, mce_inject_cpumask); + raise_exception(m, NULL); + } +} + /* Inject mce on current CPU */ static int raise_local(void) { @@ -139,9 +152,10 @@ static void raise_mce(struct mce *m) return; #ifdef CONFIG_X86_LOCAL_APIC - if (m->inject_flags & MCJ_NMI_BROADCAST) { + if (m->inject_flags & (MCJ_IRQ_BRAODCAST | MCJ_NMI_BROADCAST)) { unsigned long start; int cpu; + get_online_cpus(); cpumask_copy(mce_inject_cpumask, cpu_online_mask); cpumask_clear_cpu(get_cpu(), mce_inject_cpumask); @@ -151,13 +165,25 @@ static void raise_mce(struct mce *m) MCJ_CTX(mcpu->inject_flags) != MCJ_CTX_RANDOM) cpumask_clear_cpu(cpu, mce_inject_cpumask); } - if (!cpumask_empty(mce_inject_cpumask)) - apic->send_IPI_mask(mce_inject_cpumask, NMI_VECTOR); + if (!cpumask_empty(mce_inject_cpumask)) { + if (m->inject_flags & MCJ_IRQ_BRAODCAST) { + /* + * don't wait because mce_irq_ipi is necessary + * to be sync with following raise_local + */ + preempt_disable(); + smp_call_function_many(mce_inject_cpumask, + mce_irq_ipi, NULL, 0); + preempt_enable(); + } else if (m->inject_flags & MCJ_NMI_BROADCAST) + apic->send_IPI_mask(mce_inject_cpumask, + NMI_VECTOR); + } start = jiffies; while (!cpumask_empty(mce_inject_cpumask)) { if (!time_before(jiffies, start + 2*HZ)) { printk(KERN_ERR - "Timeout waiting for mce inject NMI %lx\n", + "Timeout waiting for mce inject %lx\n", *cpumask_bits(mce_inject_cpumask)); break; } |