void
mca_cpu_init(void)
{
unsigned int i;
/*
* The first (boot) processor is responsible for discovering the
* machine check architecture present on this machine.
*/
if (!mca_initialized) {
mca_get_availability();
mca_initialized = TRUE;
simple_lock_init(&mca_lock, 0);
}
if (mca_MCA_present) {
/* Enable all MCA features */
if (mca_control_MSR_present)
wrmsr64(IA32_MCG_CTL, IA32_MCG_CTL_ENABLE);
switch (mca_family) {
case 0x06:
/* Enable all but mc0 */
for (i = 1; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_CTL(i),0xFFFFFFFFFFFFFFFFULL);
/* Clear all errors */
for (i = 0; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_STATUS(i), 0ULL);
break;
case 0x0F:
/* Enable all banks */
for (i = 0; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_CTL(i),0xFFFFFFFFFFFFFFFFULL);
/* Clear all errors */
for (i = 0; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_STATUS(i), 0ULL);
break;
}
}
/* Enable machine check exception handling if available */
if (mca_MCE_present) {
set_cr4(get_cr4()|CR4_MCE);
}
}
static void
mca_save_state(mca_state_t *mca_state)
{
mca_mci_bank_t *bank;
unsigned int i;
assert(!ml_get_interrupts_enabled() || get_preemption_level() > 0);
if (mca_state == NULL)
return;
mca_state->mca_mcg_ctl = mca_control_MSR_present ?
rdmsr64(IA32_MCG_CTL) : 0ULL;
mca_state->mca_mcg_status.u64 = rdmsr64(IA32_MCG_STATUS);
bank = (mca_mci_bank_t *) &mca_state->mca_error_bank[0];
for (i = 0; i < mca_error_bank_count; i++, bank++) {
bank->mca_mci_ctl = rdmsr64(IA32_MCi_CTL(i));
bank->mca_mci_status.u64 = rdmsr64(IA32_MCi_STATUS(i));
if (!bank->mca_mci_status.bits.val)
continue;
bank->mca_mci_misc = (bank->mca_mci_status.bits.miscv)?
rdmsr64(IA32_MCi_MISC(i)) : 0ULL;
bank->mca_mci_addr = (bank->mca_mci_status.bits.addrv)?
rdmsr64(IA32_MCi_ADDR(i)) : 0ULL;
}
/*
* If we're the first thread with MCA state, point our package to it
* and don't care about races
*/
if (x86_package()->mca_state == NULL)
x86_package()->mca_state = mca_state;
}