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x86, mce: support more than 256 CPUs in struct mce 

The old struct mce had a limitation to 256 CPUs. But x86 Linux supports
more than that now with x2apic. Add a new field extcpu to report the
extended number.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Andi Kleen 2009-05-27 21:56:56 +02:00 committed by H. Peter Anvin
parent f6fb0ac086
commit d620c67fb9
3 changed files with 9 additions and 9 deletions
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4
arch/x86/include/asm/mce.h
View File

@ -40,9 +40,9 @@ struct mce {
__u64 res2; /* dito. */
__u8 cs; /* code segment */
__u8 bank; /* machine check bank */
__u8 cpu; /* cpu that raised the error */
__u8 cpu; /* cpu number; obsolete; use extcpu now */
__u8 finished; /* entry is valid */
__u32 pad;
__u32 extcpu; /* linux cpu number that detected the error */
};
/*

10
arch/x86/kernel/cpu/mcheck/mce-inject.c
View File

@ -23,14 +23,14 @@
/* Update fake mce registers on current CPU. */
static void inject_mce(struct mce *m)
{
struct mce *i = &per_cpu(injectm, m->cpu);
struct mce *i = &per_cpu(injectm, m->extcpu);
/* Make sure noone reads partially written injectm */
i->finished = 0;
mb();
m->finished = 0;
/* First set the fields after finished */
i->cpu = m->cpu;
i->extcpu = m->extcpu;
mb();
/* Now write record in order, finished last (except above) */
memcpy(i, m, sizeof(struct mce));
@ -49,7 +49,7 @@ static void raise_mce(unsigned long data)
{
struct delayed_mce *dm = (struct delayed_mce *)data;
struct mce *m = &dm->m;
int cpu = m->cpu;
int cpu = m->extcpu;
inject_mce(m);
if (m->status & MCI_STATUS_UC) {
@ -93,7 +93,7 @@ static ssize_t mce_write(struct file *filp, const char __user *ubuf,
if (copy_from_user(&m, ubuf, usize))
return -EFAULT;
if (m.cpu >= num_possible_cpus() || !cpu_online(m.cpu))
if (m.extcpu >= num_possible_cpus() || !cpu_online(m.extcpu))
return -EINVAL;
dm = kmalloc(sizeof(struct delayed_mce), GFP_KERNEL);
@ -108,7 +108,7 @@ static ssize_t mce_write(struct file *filp, const char __user *ubuf,
memcpy(&dm->m, &m, sizeof(struct mce));
setup_timer(&dm->timer, raise_mce, (unsigned long)dm);
dm->timer.expires = jiffies + 2;
add_timer_on(&dm->timer, m.cpu);
add_timer_on(&dm->timer, m.extcpu);
return usize;
}

4
arch/x86/kernel/cpu/mcheck/mce.c
View File

@ -94,7 +94,7 @@ static inline int skip_bank_init(int i)
void mce_setup(struct mce *m)
{
memset(m, 0, sizeof(struct mce));
m->cpu = smp_processor_id();
m->cpu = m->extcpu = smp_processor_id();
rdtscll(m->tsc);
}
@ -158,7 +158,7 @@ static void print_mce(struct mce *m)
KERN_EMERG "HARDWARE ERROR\n"
KERN_EMERG
"CPU %d: Machine Check Exception: %16Lx Bank %d: %016Lx\n",
m->cpu, m->mcgstatus, m->bank, m->status);
m->extcpu, m->mcgstatus, m->bank, m->status);
if (m->ip) {
printk(KERN_EMERG "RIP%s %02x:<%016Lx> ",
!(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",