void
mca_dump(void)
{
mca_state_t *mca_state = current_cpu_datap()->cpu_mca_state;
uint64_t deadline;
unsigned int i = 0;
/*
* Capture local MCA registers to per-cpu data.
*/
mca_save_state(mca_state);
/*
* Serialize: the first caller controls dumping MCA registers,
* other threads spin meantime.
*/
simple_lock(&mca_lock);
if (mca_dump_state > CLEAR) {
simple_unlock(&mca_lock);
while (mca_dump_state == DUMPING)
cpu_pause();
return;
}
mca_dump_state = DUMPING;
simple_unlock(&mca_lock);
/*
* Wait for all other hardware threads to save their state.
* Or timeout.
*/
deadline = mach_absolute_time() + LockTimeOut;
while (mach_absolute_time() < deadline && i < real_ncpus) {
if (!cpu_datap(i)->cpu_mca_state->mca_is_saved) {
cpu_pause();
continue;
}
i += 1;
}
/*
* Report machine-check capabilities:
*/
kdb_printf(
"Machine-check capabilities 0x%016qx:\n", ia32_mcg_cap.u64);
mca_report_cpu_info();
kdb_printf(
" %d error-reporting banks\n%s%s%s", mca_error_bank_count,
IF(mca_control_MSR_present,
" control MSR present\n"),
IF(mca_threshold_status_present,
" threshold-based error status present\n"),
IF(mca_cmci_present,
" extended corrected memory error handling present\n"));
if (mca_extended_MSRs_present)
kdb_printf(
" %d extended MSRs present\n", mca_extended_MSRs_count);
/*
* Dump all processor state:
*/
for (i = 0; i < real_ncpus; i++) {
mca_state_t *mcsp = cpu_datap(i)->cpu_mca_state;
ia32_mcg_status_t status;
kdb_printf("Processor %d: ", i);
if (mcsp == NULL ||
mcsp->mca_is_saved == FALSE ||
mcsp->mca_mcg_status.u64 == 0) {
kdb_printf("no machine-check status reported\n");
continue;
}
if (!mcsp->mca_is_valid) {
kdb_printf("no valid machine-check state\n");
continue;
}
status = mcsp->mca_mcg_status;
kdb_printf(
"machine-check status 0x%016qx:\n%s%s%s", status.u64,
IF(status.bits.ripv, " restart IP valid\n"),
IF(status.bits.eipv, " error IP valid\n"),
IF(status.bits.mcip, " machine-check in progress\n"));
mca_cpu_dump_error_banks(mcsp);
}
/*
* Dump any extended machine state:
*/
if (mca_extended_MSRs_present) {
if (cpu_mode_is64bit())
mca_dump_64bit_state();
else
mca_dump_32bit_state();
}
/* Update state to release any other threads. */
mca_dump_state = DUMPED;
}
void
mca_dump(void)
{
ia32_mcg_status_t status;
mca_state_t *mca_state = current_cpu_datap()->cpu_mca_state;
/*
* Capture local MCA registers to per-cpu data.
*/
mca_save_state(mca_state);
/*
* Serialize in case of multiple simultaneous machine-checks.
* Only the first caller is allowed to dump MCA registers,
* other threads spin meantime.
*/
simple_lock(&mca_lock);
if (mca_dump_state > CLEAR) {
simple_unlock(&mca_lock);
while (mca_dump_state == DUMPING)
cpu_pause();
return;
}
mca_dump_state = DUMPING;
simple_unlock(&mca_lock);
/*
* Report machine-check capabilities:
*/
kdb_printf(
"Machine-check capabilities (cpu %d) 0x%016qx:\n",
cpu_number(), ia32_mcg_cap.u64);
mca_report_cpu_info();
kdb_printf(
" %d error-reporting banks\n%s%s%s", mca_error_bank_count,
IF(mca_control_MSR_present,
" control MSR present\n"),
IF(mca_threshold_status_present,
" threshold-based error status present\n"),
IF(mca_cmci_present,
" extended corrected memory error handling present\n"));
if (mca_extended_MSRs_present)
kdb_printf(
" %d extended MSRs present\n", mca_extended_MSRs_count);
/*
* Report machine-check status:
*/
status.u64 = rdmsr64(IA32_MCG_STATUS);
kdb_printf(
"Machine-check status 0x%016qx:\n%s%s%s", status.u64,
IF(status.bits.ripv, " restart IP valid\n"),
IF(status.bits.eipv, " error IP valid\n"),
IF(status.bits.mcip, " machine-check in progress\n"));
/*
* Dump error-reporting registers:
*/
mca_dump_error_banks(mca_state);
/*
* Dump any extended machine state:
*/
if (mca_extended_MSRs_present) {
if (cpu_mode_is64bit())
mca_dump_64bit_state();
else
mca_dump_32bit_state();
}
/* Update state to release any other threads. */
mca_dump_state = DUMPED;
}
