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Merge branch 'mce-inject' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/mce

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This commit is contained in:
Ingo Molnar 2011-12-18 09:18:45 +01:00
commit a228b5892b
2 changed files with 35 additions and 8 deletions
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9
arch/x86/include/asm/mce.h
View file

@ -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 {

34
arch/x86/kernel/cpu/mcheck/mce-inject.c
View file

@ -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;
}