linux-kernel - [PATCH] x86/mce: add CMCI support for Centaur CPUs

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Date:   Thu, 31 May 2018 11:28:58 +0800
From:   David Wang <davidwang@...oxin.com>
To:     <bp@...en8.de>, <tony.luck@...el.com>, <mingo@...hat.com>,
        <tglx@...utronix.de>, <hpa@...or.com>, <gregkh@...uxfoudation.org>,
        <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
        <linux-edac@...r.kernel.org>
CC:     <brucechang@...-alliance.com>, <cooperyan@...oxin.com>,
        <qiyuanwang@...oxin.com>, <benjaminpan@...tech.com>,
        <lukelin@...cpu.com>, <timguo@...oxin.com>,
        David Wang <davidwang@...oxin.com>
Subject: [PATCH] x86/mce: add CMCI support for Centaur CPUs

Newer Centaur support CMCI mechanism, which is compatible with INTEL CMCI.

Signed-off-by: David Wang <davidwang@...oxin.com>
---
 arch/x86/Kconfig                 | 12 ++++++++++++
 arch/x86/kernel/cpu/mcheck/mce.c |  6 ++++++
 2 files changed, 18 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index dda87a3..1adff5f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1130,6 +1130,18 @@ config X86_MCE_AMD
 	   Additional support for AMD specific MCE features such as
 	   the DRAM Error Threshold.
 
+config X86_MCE_CENTAUR
+	def_bool y
+	prompt "CENTAUR MCE features"
+	depends on CPU_SUP_CENTAUR && X86_MCE_INTEL
+	help
+	   Additional support for Centaur specific MCE features such as
+	   MCE broadcasting and CMCI support.
+	   New Centaur CPU support MCE broadcasting.
+	   New Centaur CPU support CMCI which is fully compliant with Intel CMCI.
+
+	   If unsure, say N here.
+
 config X86_ANCIENT_MCE
 	bool "Support for old Pentium 5 / WinChip machine checks"
 	depends on X86_32 && X86_MCE
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index cd76380..2ebafc7 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1727,6 +1727,7 @@ static void __mcheck_cpu_init_early(struct cpuinfo_x86 *c)
 	}
 }
 
+#ifdef CONFIG_X86_MCE_CENTAUR
 static void mce_centaur_feature_init(struct cpuinfo_x86 *c)
 {
 	struct mca_config *cfg = &mca_cfg;
@@ -1740,7 +1741,12 @@ static void mce_centaur_feature_init(struct cpuinfo_x86 *c)
 		if (cfg->monarch_timeout < 0)
 			cfg->monarch_timeout = USEC_PER_SEC;
 	}
+	mce_intel_feature_init(c);
+	mce_adjust_timer = cmci_intel_adjust_timer;
 }
+#else
+static inline void mce_centaur_feature_init(struct cpuinfo_x86 *c) { }
+#endif
 
 static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
 {
-- 
1.9.1