static int raise_local(void)
{
struct mce *m = &__get_cpu_var(injectm);
int context = MCJ_CTX(m->inject_flags);
int ret = 0;
int cpu = m->extcpu;
if (m->inject_flags & MCJ_EXCEPTION) {
printk(KERN_INFO "Triggering MCE exception on CPU %d\n", cpu);
switch (context) {
case MCJ_CTX_IRQ:
case MCJ_CTX_PROCESS:
raise_exception(m, NULL);
break;
default:
printk(KERN_INFO "Invalid MCE context\n");
ret = -EINVAL;
}
printk(KERN_INFO "MCE exception done on CPU %d\n", cpu);
} else if (m->status) {
printk(KERN_INFO "Starting machine check poll CPU %d\n", cpu);
raise_poll(m);
mce_notify_irq();
printk(KERN_INFO "Machine check poll done on CPU %d\n", cpu);
} else
m->finished = 0;
return ret;
}
/* Inject mce on current CPU */
static void raise_mce(unsigned long data)
{
struct delayed_mce *dm = (struct delayed_mce *)data;
struct mce *m = &dm->m;
int cpu = m->extcpu;
inject_mce(m);
if (m->status & MCI_STATUS_UC) {
struct pt_regs regs;
memset(®s, 0, sizeof(struct pt_regs));
regs.ip = m->ip;
regs.cs = m->cs;
printk(KERN_INFO "Triggering MCE exception on CPU %d\n", cpu);
do_machine_check(®s, 0);
printk(KERN_INFO "MCE exception done on CPU %d\n", cpu);
} else {
mce_banks_t b;
memset(&b, 0xff, sizeof(mce_banks_t));
printk(KERN_INFO "Starting machine check poll CPU %d\n", cpu);
machine_check_poll(0, &b);
mce_notify_irq();
printk(KERN_INFO "Finished machine check poll on CPU %d\n",
cpu);
}
kfree(dm);
}
/* Inject mce on current CPU */
static int raise_local(void)
{
struct mce *m = &__get_cpu_var(injectm);
int context = MCJ_CTX(m->inject_flags);
int ret = 0;
int cpu = m->extcpu;
if (m->inject_flags & MCJ_EXCEPTION) {
printk(KERN_INFO "Triggering MCE exception on CPU %d\n", cpu);
switch (context) {
case MCJ_CTX_IRQ:
/*
* Could do more to fake interrupts like
* calling irq_enter, but the necessary
* machinery isn't exported currently.
*/
/*FALL THROUGH*/
case MCJ_CTX_PROCESS:
raise_exception(m, NULL);
break;
default:
printk(KERN_INFO "Invalid MCE context\n");
ret = -EINVAL;
}
printk(KERN_INFO "MCE exception done on CPU %d\n", cpu);
} else if (m->status) {
printk(KERN_INFO "Starting machine check poll CPU %d\n", cpu);
raise_poll(m);
mce_notify_irq();
printk(KERN_INFO "Machine check poll done on CPU %d\n", cpu);
} else
m->finished = 0;
return ret;
}
/*
* The interrupt handler. This is called on every event.
* Just call the poller directly to log any events.
* This could in theory increase the threshold under high load,
* but doesn't for now.
*/
static void intel_threshold_interrupt(void)
{
if (cmci_storm_detect())
return;
machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
mce_notify_irq();
}
void apei_mce_report_mem_error(int corrected, struct cper_sec_mem_err *mem_err)
{
struct mce m;
/* Only corrected MC is reported */
if (!corrected || !(mem_err->validation_bits & CPER_MEM_VALID_PA))
return;
mce_setup(&m);
m.bank = 1;
/* Fake a memory read corrected error with unknown channel */
m.status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_ADDRV | 0x9f;
m.addr = mem_err->physical_addr;
mce_log(&m);
mce_notify_irq();
}
unsigned long cmci_intel_adjust_timer(unsigned long interval)
{
if ((this_cpu_read(cmci_backoff_cnt) > 0) &&
(__this_cpu_read(cmci_storm_state) == CMCI_STORM_ACTIVE)) {
mce_notify_irq();
return CMCI_STORM_INTERVAL;
}
switch (__this_cpu_read(cmci_storm_state)) {
case CMCI_STORM_ACTIVE:
/*
* We switch back to interrupt mode once the poll timer has
* silenced itself. That means no events recorded and the timer
* interval is back to our poll interval.
*/
__this_cpu_write(cmci_storm_state, CMCI_STORM_SUBSIDED);
if (!atomic_sub_return(1, &cmci_storm_on_cpus))
pr_notice("CMCI storm subsided: switching to interrupt mode\n");
/* FALLTHROUGH */
case CMCI_STORM_SUBSIDED:
/*
* We wait for all CPUs to go back to SUBSIDED state. When that
* happens we switch back to interrupt mode.
*/
if (!atomic_read(&cmci_storm_on_cpus)) {
__this_cpu_write(cmci_storm_state, CMCI_STORM_NONE);
cmci_reenable();
cmci_recheck();
}
return CMCI_POLL_INTERVAL;
default:
/* We have shiny weather. Let the poll do whatever it thinks. */
return interval;
}
}
/*
* The interrupt handler. This is called on every event.
* Just call the poller directly to log any events.
* This could in theory increase the threshold under high load,
* but doesn't for now.
*/
static void intel_threshold_interrupt(void)
{
machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
mce_notify_irq();
}
