[PATCH 3/3] x86/mce: add Zhaoxin another CPU Vendor ID support

[Tony W Wang-oc]

Add Zhaoxin CPUs with Vendor ID "CentaurHauls" support for CMCI/LMCE.

Signed-off-by: Tony W Wang-oc <TonyWWang-oc@xxxxxxxxxxx>
---
 arch/x86/kernel/cpu/mce/core.c  | 15 +++++++++++----
 arch/x86/kernel/cpu/mce/intel.c |  3 ++-
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index f919fa3ab69d..38228021fe99 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -466,7 +466,8 @@ int mce_usable_address(struct mce *m)
 
 	/* Checks after this one are Intel/Zhaoxin-specific: */
 	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 1;
 
 	if (!(m->status & MCI_STATUS_MISCV))
@@ -491,6 +492,7 @@ 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
 		 *
@@ -1192,7 +1194,8 @@ 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;
 		}
@@ -1466,7 +1469,8 @@ 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;
 
 	/*
@@ -1981,6 +1985,7 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
 		break;
 
 	case X86_VENDOR_ZHAOXIN:
+	case X86_VENDOR_CENTAUR:
 		mce_zhaoxin_feature_init();
 		mce_adjust_timer = cmci_intel_adjust_timer;
 		break;
@@ -1998,6 +2003,7 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c)
 		break;
 
 	case X86_VENDOR_ZHAOXIN:
+	case X86_VENDOR_CENTAUR:
 		mce_zhaoxin_feature_clear();
 		break;
 
@@ -2282,7 +2288,8 @@ 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 95275a5e57e0..92f7104c86ad 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -86,7 +86,8 @@ 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)
-- 
2.17.1