[PATCH v2 1/3] x86/mce: Add centaur vendor to support Zhaoxin MCA

[Tony W Wang-oc]

From: Lyle Li <LyleLi@xxxxxxxxxxx>

Zhaoxin consists of two vendors, X86_VENDOR_ZHAOXIN and
X86_VENDOR_CENTAUR, so add the centaur vendor to support
Zhaoxin MCA in mce/core.c and mce/intel.c.

Signed-off-by: Lyle Li <LyleLi@xxxxxxxxxxx>
---
 arch/x86/kernel/cpu/mce/core.c  | 42 ++++++++++++++++-----------------
 arch/x86/kernel/cpu/mce/intel.c |  3 ++-
 2 files changed, 23 insertions(+), 22 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index ad0623b65..b7b98c33a 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -496,6 +496,7 @@ bool mce_usable_address(struct mce *m)
 
 	case X86_VENDOR_INTEL:
 	case X86_VENDOR_ZHAOXIN:
+	case X86_VENDOR_CENTAUR:
 		return intel_mce_usable_address(m);
 
 	default:
@@ -513,6 +514,7 @@ bool mce_is_memory_error(struct mce *m)
 
 	case X86_VENDOR_INTEL:
 	case X86_VENDOR_ZHAOXIN:
+	case X86_VENDOR_CENTAUR:
 		/*
 		 * Intel SDM Volume 3B - 15.9.2 Compound Error Codes
 		 *
@@ -1247,7 +1249,8 @@ static noinstr bool mce_check_crashing_cpu(void)
 
 		mcgstatus = __rdmsr(MSR_IA32_MCG_STATUS);
 
-		if (boot_cpu_data.x86_vendor == X86_VENDOR_ZHAOXIN) {
+		if (boot_cpu_data.x86_vendor == X86_VENDOR_ZHAOXIN ||
+		    boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR) {
 			if (mcgstatus & MCG_STATUS_LMCES)
 				return false;
 		}
@@ -1521,7 +1524,8 @@ noinstr void do_machine_check(struct pt_regs *regs)
 	 * on Intel, Zhaoxin only.
 	 */
 	if (m.cpuvendor == X86_VENDOR_INTEL ||
-	    m.cpuvendor == X86_VENDOR_ZHAOXIN)
+	    m.cpuvendor == X86_VENDOR_ZHAOXIN ||
+	    m.cpuvendor == X86_VENDOR_CENTAUR)
 		lmce = m.mcgstatus & MCG_STATUS_LMCES;
 
 	/*
@@ -1970,6 +1974,18 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 		}
 	}
 
+	if (c->x86_vendor == X86_VENDOR_CENTAUR) {
+		/*
+		 * All newer Centaur CPUs support MCE broadcasting. Enable
+		 * synchronization with a one second timeout.
+		 */
+		if ((c->x86 == 6 && c->x86_model == 0xf && c->x86_stepping >= 0xe) ||
+		     c->x86 > 6) {
+			if (cfg->monarch_timeout < 0)
+				cfg->monarch_timeout = USEC_PER_SEC;
+		}
+	}
+
 	if (cfg->monarch_timeout < 0)
 		cfg->monarch_timeout = 0;
 	if (cfg->bootlog != 0)
@@ -2012,21 +2028,6 @@ static void __mcheck_cpu_init_early(struct cpuinfo_x86 *c)
 	}
 }
 
-static void mce_centaur_feature_init(struct cpuinfo_x86 *c)
-{
-	struct mca_config *cfg = &mca_cfg;
-
-	 /*
-	  * All newer Centaur CPUs support MCE broadcasting. Enable
-	  * synchronization with a one second timeout.
-	  */
-	if ((c->x86 == 6 && c->x86_model == 0xf && c->x86_stepping >= 0xe) ||
-	     c->x86 > 6) {
-		if (cfg->monarch_timeout < 0)
-			cfg->monarch_timeout = USEC_PER_SEC;
-	}
-}
-
 static void mce_zhaoxin_feature_init(struct cpuinfo_x86 *c)
 {
 	struct mce_bank *mce_banks = this_cpu_ptr(mce_banks_array);
@@ -2072,9 +2073,6 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
 		break;
 
 	case X86_VENDOR_CENTAUR:
-		mce_centaur_feature_init(c);
-		break;
-
 	case X86_VENDOR_ZHAOXIN:
 		mce_zhaoxin_feature_init(c);
 		break;
@@ -2092,6 +2090,7 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c)
 		break;
 
 	case X86_VENDOR_ZHAOXIN:
+	case X86_VENDOR_CENTAUR:
 		mce_zhaoxin_feature_clear(c);
 		break;
 
@@ -2401,7 +2400,8 @@ static void vendor_disable_error_reporting(void)
 	if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL ||
 	    boot_cpu_data.x86_vendor == X86_VENDOR_HYGON ||
 	    boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
-	    boot_cpu_data.x86_vendor == X86_VENDOR_ZHAOXIN)
+	    boot_cpu_data.x86_vendor == X86_VENDOR_ZHAOXIN ||
+	    boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR)
 		return;
 
 	mce_disable_error_reporting();
diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c
index f6103e6bf..b7e67f4f7 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -88,7 +88,8 @@ static int cmci_supported(int *banks)
 	 * makes sure none of the backdoors are entered otherwise.
 	 */
 	if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL &&
-	    boot_cpu_data.x86_vendor != X86_VENDOR_ZHAOXIN)
+	    boot_cpu_data.x86_vendor != X86_VENDOR_ZHAOXIN &&
+	    boot_cpu_data.x86_vendor != X86_VENDOR_CENTAUR)
 		return 0;
 
 	if (!boot_cpu_has(X86_FEATURE_APIC) || lapic_get_maxlvt() < 6)
-- 
2.34.1