/*
- * Copyright (c) 2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2007-2011 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
*/
#include <kern/kalloc.h>
+#include <mach/mach_time.h>
#include <i386/cpu_data.h>
#include <i386/cpuid.h>
+#include <i386/cpu_topology.h>
+#include <i386/cpu_threads.h>
+#include <i386/lapic.h>
+#include <i386/machine_cpu.h>
#include <i386/machine_check.h>
#include <i386/proc_reg.h>
+/*
+ * At the time of the machine-check exception, all hardware-threads panic.
+ * Each thread saves the state of its MCA registers to its per-cpu data area.
+ *
+ * State reporting is serialized so one thread dumps all valid state for all
+ * threads to the panic log. This may entail spinning waiting for other
+ * threads to complete saving state to memory. A timeout applies to this wait
+ * -- in particular, a 3-strikes timeout may prevent a thread from taking
+ * part is the affair.
+ */
+
#define IF(bool,str) ((bool) ? (str) : "")
static boolean_t mca_initialized = 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 boolean_t mca_cmci_present = FALSE;
static ia32_mcg_cap_t ia32_mcg_cap;
-static boolean_t mca_exception_taken = FALSE;
-
decl_simple_lock_data(static, mca_lock);
typedef struct {
} mca_mci_bank_t;
typedef struct mca_state {
+ boolean_t mca_is_saved;
+ boolean_t mca_is_valid; /* some state is valid */
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;
+typedef enum {
+ CLEAR,
+ DUMPING,
+ DUMPED
+} mca_dump_state_t;
+static volatile mca_dump_state_t mca_dump_state = CLEAR;
+
static void
mca_get_availability(void)
{
uint64_t features = cpuid_info()->cpuid_features;
- uint32_t family = cpuid_info()->cpuid_family;
+ uint32_t family = cpuid_info()->cpuid_family;
+ uint32_t model = cpuid_info()->cpuid_model;
+ uint32_t stepping = cpuid_info()->cpuid_stepping;
+
+ if ((model == CPUID_MODEL_HASWELL && stepping < 3) ||
+ (model == CPUID_MODEL_HASWELL_ULT && stepping < 1) ||
+ (model == CPUID_MODEL_CRYSTALWELL && stepping < 1))
+ panic("Haswell pre-C0 steppings are not supported");
mca_MCE_present = (features & CPUID_FEATURE_MCE) != 0;
mca_MCA_present = (features & CPUID_FEATURE_MCA) != 0;
mca_family = family;
-
+
/*
* If MCA, the number of banks etc is reported by the IA32_MCG_CAP MSR.
*/
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;
- }
+ mca_cmci_present = ia32_mcg_cap.bits.mcg_ext_corr_err_p;
}
}
}
}
+boolean_t
+mca_is_cmci_present(void)
+{
+ if (!mca_initialized)
+ mca_cpu_init();
+ return mca_cmci_present;
+}
+
void
mca_cpu_alloc(cpu_data_t *cdp)
{
}
static void
-mca_save_state(void)
+mca_save_state(mca_state_t *mca_state)
{
- 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;
rdmsr64(IA32_MCi_MISC(i)) : 0ULL;
bank->mca_mci_addr = (bank->mca_mci_status.bits.addrv)?
rdmsr64(IA32_MCi_ADDR(i)) : 0ULL;
+ mca_state->mca_is_valid = TRUE;
}
-}
-
-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));
-}
+ /*
+ * 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;
-static uint32_t rdmsr32(uint32_t msr)
-{
- return (uint32_t) rdmsr64(msr);
+ mca_state->mca_is_saved = TRUE;
}
-static void mca_dump_32bit_state(void)
+void
+mca_check_save(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));
+ if (mca_dump_state > CLEAR)
+ mca_save_state(current_cpu_datap()->cpu_mca_state);
}
static void
mca_report_cpu_info(void)
{
- uint64_t microcode;
i386_cpu_info_t *infop = cpuid_info();
- // microcode revision is top 32 bits of MSR_IA32_UCODE_REV
- microcode = rdmsr64(MSR_IA32_UCODE_REV) >> 32;
- kdb_printf("family: %d model: %d stepping: %d microcode revision %d\n",
+ kdb_printf(" family: %d model: %d stepping: %d microcode: %d\n",
infop->cpuid_family,
infop->cpuid_model,
infop->cpuid_stepping,
- (uint32_t) microcode);
- kdb_printf("%s\n", infop->cpuid_brand_string);
+ infop->cpuid_microcode_version);
+ kdb_printf(" signature: 0x%x\n",
+ infop->cpuid_signature);
+ kdb_printf(" %s\n",
+ infop->cpuid_brand_string);
+
}
+static void
+mca_dump_bank(mca_state_t *state, int i)
+{
+ mca_mci_bank_t *bank;
+ ia32_mci_status_t status;
+
+ bank = &state->mca_error_bank[i];
+ status = bank->mca_mci_status;
+ if (!status.bits.val)
+ return;
+
+ kdb_printf(" IA32_MC%d_STATUS(0x%x): 0x%016qx\n",
+ i, IA32_MCi_STATUS(i), status.u64);
+
+ if (status.bits.addrv)
+ kdb_printf(" IA32_MC%d_ADDR(0x%x): 0x%016qx\n",
+ i, IA32_MCi_ADDR(i), bank->mca_mci_addr);
-static const char *mca_threshold_status[] = {
- [THRESHOLD_STATUS_NO_TRACKING] "No tracking",
- [THRESHOLD_STATUS_GREEN] "Green",
- [THRESHOLD_STATUS_YELLOW] "Yellow",
- [THRESHOLD_STATUS_RESERVED] "Reserved"
-};
+ if (status.bits.miscv)
+ kdb_printf(" IA32_MC%d_MISC(0x%x): 0x%016qx\n",
+ i, IA32_MCi_MISC(i), bank->mca_mci_misc);
+}
static void
-mca_dump_error_banks(void)
+mca_cpu_dump_error_banks(mca_state_t *state)
{
unsigned int i;
- ia32_mci_status_t status;
- kdb_printf("MCA error-reporting registers:\n");
+ if (!state->mca_is_valid)
+ return;
+
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)));
+ mca_dump_bank(state, i);
}
}
void
mca_dump(void)
{
- ia32_mcg_status_t status;
+ mca_state_t *mca_state = current_cpu_datap()->cpu_mca_state;
+ uint64_t deadline;
+ unsigned int i = 0;
- mca_save_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 print MCA registers.
+ * Serialize: the first caller controls dumping MCA registers,
+ * other threads spin meantime.
*/
simple_lock(&mca_lock);
- if (mca_exception_taken) {
+ if (mca_dump_state > CLEAR) {
simple_unlock(&mca_lock);
+ while (mca_dump_state == DUMPING)
+ cpu_pause();
return;
}
- mca_exception_taken = TRUE;
+ 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 (cpu %d) 0x%016qx:\n",
- cpu_number(), ia32_mcg_cap.u64);
+ 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", 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);
+ kdb_printf(" %d error-reporting banks\n", mca_error_bank_count);
/*
- * Report machine-check status:
+ * Dump all processor state:
*/
- 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"));
+ for (i = 0; i < real_ncpus; i++) {
+ mca_state_t *mcsp = cpu_datap(i)->cpu_mca_state;
+ ia32_mcg_status_t status;
+
+ if (mcsp == NULL ||
+ mcsp->mca_is_saved == FALSE ||
+ mcsp->mca_mcg_status.u64 == 0 ||
+ !mcsp->mca_is_valid) {
+ continue;
+ }
+ status = mcsp->mca_mcg_status;
+ kdb_printf("Processor %d: IA32_MCG_STATUS: 0x%016qx\n",
+ i, status.u64);
+ mca_cpu_dump_error_banks(mcsp);
+ }
- /*
- * Dump error-reporting registers:
- */
- mca_dump_error_banks();
+ /* Update state to release any other threads. */
+ mca_dump_state = DUMPED;
+}
- /*
- * Dump any extended machine state:
- */
- if (mca_extended_MSRs_present) {
- if (cpu_mode_is64bit())
- mca_dump_64bit_state();
- else
- mca_dump_32bit_state();
- }
- simple_unlock(&mca_lock);
+#if DEVELOPMENT || DEBUG
+extern void mca_exception_panic(void);
+extern void lapic_trigger_MC(void);
+void mca_exception_panic(void)
+{
+ lapic_trigger_MC();
}
+#endif
projects / apple / xnu.git / blobdiff