#include <kern/kalloc.h>
#include <i386/cpu_data.h>
#include <i386/cpuid.h>
#include <i386/machine_check.h>
#include <i386/proc_reg.h>
#define IF(bool,str) ((bool) ? (str) : "")
static boolean_t mca_initialized = FALSE;
static boolean_t mca_MCE_present = FALSE;
static boolean_t mca_MCA_present = FALSE;
static uint32_t mca_family = 0;
static unsigned int mca_error_bank_count = 0;
static boolean_t mca_control_MSR_present = FALSE;
static boolean_t mca_threshold_status_present = FALSE;
static boolean_t mca_extended_MSRs_present = FALSE;
static unsigned int mca_extended_MSRs_count = 0;
static ia32_mcg_cap_t ia32_mcg_cap;
static boolean_t mca_exception_taken = FALSE;
decl_simple_lock_data(static, mca_lock);
typedef struct {
ia32_mci_ctl_t mca_mci_ctl;
ia32_mci_status_t mca_mci_status;
ia32_mci_misc_t mca_mci_misc;
ia32_mci_addr_t mca_mci_addr;
} mca_mci_bank_t;
typedef struct mca_state {
ia32_mcg_ctl_t mca_mcg_ctl;
ia32_mcg_status_t mca_mcg_status;
mca_mci_bank_t mca_error_bank[0];
} mca_state_t;
static void
mca_get_availability(void)
{
uint64_t features = cpuid_info()->cpuid_features;
uint32_t family = cpuid_info()->cpuid_family;
mca_MCE_present = (features & CPUID_FEATURE_MCE) != 0;
mca_MCA_present = (features & CPUID_FEATURE_MCA) != 0;
mca_family = family;
if (mca_MCA_present) {
ia32_mcg_cap.u64 = rdmsr64(IA32_MCG_CAP);
mca_error_bank_count = ia32_mcg_cap.bits.count;
mca_control_MSR_present = ia32_mcg_cap.bits.mcg_ctl_p;
mca_threshold_status_present = ia32_mcg_cap.bits.mcg_tes_p;
if (family == 0x0F) {
mca_extended_MSRs_present = ia32_mcg_cap.bits.mcg_ext_p;
mca_extended_MSRs_count = ia32_mcg_cap.bits.mcg_ext_cnt;
}
}
}
void
mca_cpu_init(void)
{
unsigned int i;
if (!mca_initialized) {
mca_get_availability();
mca_initialized = TRUE;
simple_lock_init(&mca_lock, 0);
}
if (mca_MCA_present) {
if (mca_control_MSR_present)
wrmsr64(IA32_MCG_CTL, IA32_MCG_CTL_ENABLE);
switch (mca_family) {
case 0x06:
for (i = 1; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_CTL(i),0xFFFFFFFFFFFFFFFFULL);
for (i = 0; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_STATUS(i), 0ULL);
break;
case 0x0F:
for (i = 0; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_CTL(i),0xFFFFFFFFFFFFFFFFULL);
for (i = 0; i < mca_error_bank_count; i++)
wrmsr64(IA32_MCi_STATUS(i), 0ULL);
break;
}
}
if (mca_MCE_present) {
set_cr4(get_cr4()|CR4_MCE);
}
}
void
mca_cpu_alloc(cpu_data_t *cdp)
{
vm_size_t mca_state_size;
mca_state_size = sizeof(mca_state_t) +
sizeof(mca_mci_bank_t) * mca_error_bank_count;
cdp->cpu_mca_state = kalloc(mca_state_size);
if (cdp->cpu_mca_state == NULL) {
printf("mca_cpu_alloc() failed for cpu %d\n", cdp->cpu_number);
return;
}
bzero((void *) cdp->cpu_mca_state, mca_state_size);
if (cpu_datap(master_cpu)->cpu_mca_state == NULL)
mca_cpu_alloc(cpu_datap(master_cpu));
}
static void
mca_save_state(void)
{
mca_state_t *mca_state;
mca_mci_bank_t *bank;
unsigned int i;
assert(!ml_get_interrupts_enabled() || get_preemption_level() > 0);
mca_state = (mca_state_t *) current_cpu_datap()->cpu_mca_state;
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;
}
}
void
mca_check_save(void)
{
if (mca_exception_taken)
mca_save_state();
}
static void mca_dump_64bit_state(void)
{
kdb_printf("Extended Machine Check State:\n");
kdb_printf(" IA32_MCG_RAX: 0x%016qx\n", rdmsr64(IA32_MCG_RAX));
kdb_printf(" IA32_MCG_RBX: 0x%016qx\n", rdmsr64(IA32_MCG_RBX));
kdb_printf(" IA32_MCG_RCX: 0x%016qx\n", rdmsr64(IA32_MCG_RCX));
kdb_printf(" IA32_MCG_RDX: 0x%016qx\n", rdmsr64(IA32_MCG_RDX));
kdb_printf(" IA32_MCG_RSI: 0x%016qx\n", rdmsr64(IA32_MCG_RSI));
kdb_printf(" IA32_MCG_RDI: 0x%016qx\n", rdmsr64(IA32_MCG_RDI));
kdb_printf(" IA32_MCG_RBP: 0x%016qx\n", rdmsr64(IA32_MCG_RBP));
kdb_printf(" IA32_MCG_RSP: 0x%016qx\n", rdmsr64(IA32_MCG_RSP));
kdb_printf(" IA32_MCG_RFLAGS: 0x%016qx\n", rdmsr64(IA32_MCG_RFLAGS));
kdb_printf(" IA32_MCG_RIP: 0x%016qx\n", rdmsr64(IA32_MCG_RIP));
kdb_printf(" IA32_MCG_MISC: 0x%016qx\n", rdmsr64(IA32_MCG_MISC));
kdb_printf(" IA32_MCG_R8: 0x%016qx\n", rdmsr64(IA32_MCG_R8));
kdb_printf(" IA32_MCG_R9: 0x%016qx\n", rdmsr64(IA32_MCG_R9));
kdb_printf(" IA32_MCG_R10: 0x%016qx\n", rdmsr64(IA32_MCG_R10));
kdb_printf(" IA32_MCG_R11: 0x%016qx\n", rdmsr64(IA32_MCG_R11));
kdb_printf(" IA32_MCG_R12: 0x%016qx\n", rdmsr64(IA32_MCG_R12));
kdb_printf(" IA32_MCG_R13: 0x%016qx\n", rdmsr64(IA32_MCG_R13));
kdb_printf(" IA32_MCG_R14: 0x%016qx\n", rdmsr64(IA32_MCG_R14));
kdb_printf(" IA32_MCG_R15: 0x%016qx\n", rdmsr64(IA32_MCG_R15));
}
static uint32_t rdmsr32(uint32_t msr)
{
return (uint32_t) rdmsr64(msr);
}
static void mca_dump_32bit_state(void)
{
kdb_printf("Extended Machine Check State:\n");
kdb_printf(" IA32_MCG_EAX: 0x%08x\n", rdmsr32(IA32_MCG_EAX));
kdb_printf(" IA32_MCG_EBX: 0x%08x\n", rdmsr32(IA32_MCG_EBX));
kdb_printf(" IA32_MCG_ECX: 0x%08x\n", rdmsr32(IA32_MCG_ECX));
kdb_printf(" IA32_MCG_EDX: 0x%08x\n", rdmsr32(IA32_MCG_EDX));
kdb_printf(" IA32_MCG_ESI: 0x%08x\n", rdmsr32(IA32_MCG_ESI));
kdb_printf(" IA32_MCG_EDI: 0x%08x\n", rdmsr32(IA32_MCG_EDI));
kdb_printf(" IA32_MCG_EBP: 0x%08x\n", rdmsr32(IA32_MCG_EBP));
kdb_printf(" IA32_MCG_ESP: 0x%08x\n", rdmsr32(IA32_MCG_ESP));
kdb_printf(" IA32_MCG_EFLAGS: 0x%08x\n", rdmsr32(IA32_MCG_EFLAGS));
kdb_printf(" IA32_MCG_EIP: 0x%08x\n", rdmsr32(IA32_MCG_EIP));
kdb_printf(" IA32_MCG_MISC: 0x%08x\n", rdmsr32(IA32_MCG_MISC));
}
static void
mca_report_cpu_info(void)
{
uint64_t microcode;
i386_cpu_info_t *infop = cpuid_info();
microcode = rdmsr64(MSR_IA32_UCODE_REV) >> 32;
kdb_printf("family: %d model: %d stepping: %d microcode revision %d\n",
infop->cpuid_family,
infop->cpuid_model,
infop->cpuid_stepping,
(uint32_t) microcode);
kdb_printf("%s\n", infop->cpuid_brand_string);
}
static const char *mca_threshold_status[] = {
[THRESHOLD_STATUS_NO_TRACKING] "No tracking",
[THRESHOLD_STATUS_GREEN] "Green",
[THRESHOLD_STATUS_YELLOW] "Yellow",
[THRESHOLD_STATUS_RESERVED] "Reserved"
};
static void
mca_dump_error_banks(void)
{
unsigned int i;
ia32_mci_status_t status;
kdb_printf("MCA error-reporting registers:\n");
for (i = 0; i < mca_error_bank_count; i++ ) {
status.u64 = rdmsr64(IA32_MCi_STATUS(i));
kdb_printf(
" IA32_MC%d_STATUS(0x%x): 0x%016qx %svalid\n",
i, IA32_MCi_STATUS(i), status.u64,
IF(!status.bits.val, "in"));
if (!status.bits.val)
continue;
kdb_printf(
" MCA error code : 0x%04x\n",
status.bits.mca_error);
kdb_printf(
" Model specific error code: 0x%04x\n",
status.bits.model_specific_error);
if (!mca_threshold_status_present) {
kdb_printf(
" Other information : 0x%08x\n",
status.bits.other_information);
} else {
int threshold = status.bits_tes_p.threshold;
kdb_printf(
" Other information : 0x%08x\n"
" Threshold-based status : %s\n",
status.bits_tes_p.other_information,
(status.bits_tes_p.uc == 0) ?
mca_threshold_status[threshold] :
"Undefined");
}
kdb_printf(
" Status bits:\n%s%s%s%s%s%s",
IF(status.bits.pcc, " Processor context corrupt\n"),
IF(status.bits.addrv, " ADDR register valid\n"),
IF(status.bits.miscv, " MISC register valid\n"),
IF(status.bits.en, " Error enabled\n"),
IF(status.bits.uc, " Uncorrected error\n"),
IF(status.bits.over, " Error overflow\n"));
if (status.bits.addrv)
kdb_printf(
" IA32_MC%d_ADDR(0x%x): 0x%016qx\n",
i, IA32_MCi_ADDR(i), rdmsr64(IA32_MCi_ADDR(i)));
if (status.bits.miscv)
kdb_printf(
" IA32_MC%d_MISC(0x%x): 0x%016qx\n",
i, IA32_MCi_MISC(i), rdmsr64(IA32_MCi_MISC(i)));
}
}
void
mca_dump(void)
{
ia32_mcg_status_t status;
mca_save_state();
simple_lock(&mca_lock);
if (mca_exception_taken) {
simple_unlock(&mca_lock);
return;
}
mca_exception_taken = TRUE;
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", 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_extended_MSRs_present)
kdb_printf(
" %d extended MSRs present\n", mca_extended_MSRs_count);
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"));
mca_dump_error_banks();
if (mca_extended_MSRs_present) {
if (cpu_mode_is64bit())
mca_dump_64bit_state();
else
mca_dump_32bit_state();
}
simple_unlock(&mca_lock);
}