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-rw-r--r--src/soc/intel/denverton_ns/cpu.c29
-rw-r--r--src/soc/intel/denverton_ns/include/soc/msr.h5
2 files changed, 34 insertions, 0 deletions
diff --git a/src/soc/intel/denverton_ns/cpu.c b/src/soc/intel/denverton_ns/cpu.c
index b3a12c5cad..ce6df68f9f 100644
--- a/src/soc/intel/denverton_ns/cpu.c
+++ b/src/soc/intel/denverton_ns/cpu.c
@@ -35,12 +35,41 @@
static struct smm_relocation_attrs relo_attrs;
+static void dnv_configure_mca(void)
+{
+ msr_t msr;
+ int num_banks;
+ struct cpuid_result cpuid_regs;
+
+ /* Check feature flag in CPUID.(EAX=1):EDX[7]==1 MCE
+ * and CPUID.(EAX=1):EDX[14]==1 MCA*/
+ cpuid_regs = cpuid(1);
+ if ((cpuid_regs.edx & (1<<7 | 1<<14)) != (1<<7 | 1<<14))
+ return;
+
+ msr = rdmsr(IA32_MCG_CAP);
+ num_banks = msr.lo & IA32_MCG_CAP_COUNT_MASK;
+ if (msr.lo & IA32_MCG_CAP_CTL_P_MASK) {
+ /* Enable all error logging */
+ msr.lo = msr.hi = 0xffffffff;
+ wrmsr(IA32_MCG_CTL, msr);
+ }
+
+ /* TODO(adurbin): This should only be done on a cold boot. Also, some
+ of these banks are core vs package scope. For now every CPU clears
+ every bank. */
+ mca_configure(NULL);
+}
+
static void denverton_core_init(struct device *cpu)
{
msr_t msr;
printk(BIOS_DEBUG, "Init Denverton-NS SoC cores.\n");
+ /* Clear out pending MCEs */
+ dnv_configure_mca();
+
/* Enable Fast Strings */
msr = rdmsr(IA32_MISC_ENABLE);
msr.lo |= FAST_STRINGS_ENABLE_BIT;
diff --git a/src/soc/intel/denverton_ns/include/soc/msr.h b/src/soc/intel/denverton_ns/include/soc/msr.h
index 825d4cfca8..1b27eefcaa 100644
--- a/src/soc/intel/denverton_ns/include/soc/msr.h
+++ b/src/soc/intel/denverton_ns/include/soc/msr.h
@@ -25,6 +25,11 @@
#define MSR_PKG_CST_CONFIG_CONTROL 0xe2
#define MSR_PMG_IO_CAPTURE_BASE 0xe4
#define MSR_FEATURE_CONFIG 0x13c
+#define IA32_MCG_CAP 0x179
+#define IA32_MCG_CAP_COUNT_MASK 0xff
+#define IA32_MCG_CAP_CTL_P_BIT 8
+#define IA32_MCG_CAP_CTL_P_MASK (1 << IA32_MCG_CAP_CTL_P_BIT)
+#define IA32_MCG_CTL 0x17b
#define SMM_MCA_CAP_MSR 0x17d
#define SMM_CPU_SVRSTR_BIT 57
#define SMM_CPU_SVRSTR_MASK (1 << (SMM_CPU_SVRSTR_BIT - 32))