soc/intel/denverton_ns: Configure MCA

Change-Id: I101eb4f008a13af92bac5ed738a8d1f1f8c65eba
Signed-off-by: Julien Viard de Galbert <jviarddegalbert@online.net>
Reviewed-on: https://review.coreboot.org/c/25433
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

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;

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))