From 78c153aed919af88c55f1f5cc00a07d6c7b365bd Mon Sep 17 00:00:00 2001
From: leoliu-oc <leoliu-oc@zhaoxin.com>
Date: Wed, 12 Jun 2024 15:00:19 +0800
Subject: [PATCH] x86/mce: Add Centaur MCA support

zhaoxin inclusion
category: feature

-------------------
Add MCA support for some Zhaoxin CPUs which use X86_VENDOR_CENTAUR
as vendor ID.

Signed-off-by: leoliu-oc <leoliu-oc@zhaoxin.com>
---
 arch/x86/kernel/cpu/mce/core.c  | 29 +++++++++--------------------
 arch/x86/kernel/cpu/mce/intel.c |  1 +
 2 files changed, 10 insertions(+), 20 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index e103c227acd3a..b7a1c0d9d8b25 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -482,6 +482,7 @@ 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_CENTAUR &&
 	    boot_cpu_data.x86_vendor != X86_VENDOR_ZHAOXIN)
 		return 1;
 
@@ -506,6 +507,7 @@ bool mce_is_memory_error(struct mce *m)
 		return amd_mce_is_memory_error(m);
 
 	case X86_VENDOR_INTEL:
+	case X86_VENDOR_CENTAUR:
 	case X86_VENDOR_ZHAOXIN:
 		/*
 		 * Intel SDM Volume 3B - 15.9.2 Compound Error Codes
@@ -1231,7 +1233,8 @@ 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_CENTAUR ||
+		    boot_cpu_data.x86_vendor == X86_VENDOR_ZHAOXIN) {
 			if (mcgstatus & MCG_STATUS_LMCES)
 				return false;
 		}
@@ -1505,6 +1508,7 @@ noinstr void do_machine_check(struct pt_regs *regs)
 	 * on Intel, Zhaoxin only.
 	 */
 	if (m.cpuvendor == X86_VENDOR_INTEL ||
+	    m.cpuvendor == X86_VENDOR_CENTAUR ||
 	    m.cpuvendor == X86_VENDOR_ZHAOXIN)
 		lmce = m.mcgstatus & MCG_STATUS_LMCES;
 
@@ -1932,7 +1936,8 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 			mce_flags.skx_repmov_quirk = 1;
 	}
 
-	if (c->x86_vendor == X86_VENDOR_ZHAOXIN) {
+	if (c->x86_vendor == X86_VENDOR_CENTAUR ||
+	    c->x86_vendor == X86_VENDOR_ZHAOXIN) {
 		/*
 		 * All newer Zhaoxin CPUs support MCE broadcasting. Enable
 		 * synchronization with a one second timeout.
@@ -1985,21 +1990,6 @@ 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);
@@ -2047,9 +2037,6 @@ 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;
@@ -2066,6 +2053,7 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c)
 		mce_intel_feature_clear(c);
 		break;
 
+	case X86_VENDOR_CENTAUR:
 	case X86_VENDOR_ZHAOXIN:
 		mce_zhaoxin_feature_clear(c);
 		break;
@@ -2351,6 +2339,7 @@ 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_CENTAUR ||
 	    boot_cpu_data.x86_vendor == X86_VENDOR_ZHAOXIN)
 		return;
 
diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c
index f5323551c1a9a..9ad0791246349 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -93,6 +93,7 @@ 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_CENTAUR &&
 	    boot_cpu_data.x86_vendor != X86_VENDOR_ZHAOXIN)
 		return 0;