[PATCH v4 1/4] x86/mce: Add centaur vendor to support Zhaoxin MCA

[Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>]

From: Lyle Li <LyleLi@zhaoxin.com>

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@zhaoxin.com>
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
---
 arch/x86/kernel/cpu/mce/core.c  | 9 +++++++--
 arch/x86/kernel/cpu/mce/intel.c | 3 ++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index ad0623b65..4ad6b5083 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;
 
 	/*
@@ -2092,6 +2096,7 @@ 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;
 
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