From: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
To: "tony.luck@intel.com" <tony.luck@intel.com>,
"Borislav Petkov (bp@alien8.de)" <bp@alien8.de>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"yazen.ghannam@amd.com" <yazen.ghannam@amd.com>,
"vishal.l.verma@intel.com" <vishal.l.verma@intel.com>,
"qiuxu.zhuo@intel.com" <qiuxu.zhuo@intel.com>
Cc: David Wang <DavidWang@zhaoxin.com>,
"Cooper Yan(BJ-RD)" <CooperYan@zhaoxin.com>,
"Qiyuan Wang(BJ-RD)" <QiyuanWang@zhaoxin.com>,
"Herry Yang(BJ-RD)" <HerryYang@zhaoxin.com>
Subject: [PATCH v1 4/4] x86/mce: Add Zhaoxin LMCE support
Date: Mon, 9 Sep 2019 10:21:32 +0000 [thread overview]
Message-ID: <8eec2a65dd5a4957aa5d0e6600302963@zhaoxin.com> (raw)
Zhaoxin newer CPUs support LMCE that compatible with Intel's
"Machine-Check Architecture", so add support for Zhaoxin LMCE
in mce/core.c.
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
---
arch/x86/include/asm/mce.h | 2 ++
arch/x86/kernel/cpu/mce/core.c | 25 +++++++++++++++++++++++--
2 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 0986a11..01840ec 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -352,8 +352,10 @@ static inline void mce_hygon_feature_init(struct cpuinfo_x86 *c) { return mce_am
#ifdef CONFIG_CPU_SUP_ZHAOXIN
void mce_zhaoxin_feature_init(struct cpuinfo_x86 *c);
+void mce_zhaoxin_feature_clear(struct cpuinfo_x86 *c);
#else
static inline void mce_zhaoxin_feature_init(struct cpuinfo_x86 *c) { }
+static inline void mce_zhaoxin_feature_clear(struct cpuinfo_x86 *c) { }
#endif
#endif /* _ASM_X86_MCE_H */
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index a3b07ca..857570f 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1129,6 +1129,17 @@ static bool __mc_check_crashing_cpu(int cpu)
u64 mcgstatus;
mcgstatus = mce_rdmsrl(MSR_IA32_MCG_STATUS);
+
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_ZHAOXIN) {
+ if (mcgstatus & MCG_STATUS_LMCES) {
+ return false;
+ } else {
+ if (mcgstatus & MCG_STATUS_RIPV)
+ mce_wrmsrl(MSR_IA32_MCG_STATUS, 0);
+ return true;
+ }
+ }
+
if (mcgstatus & MCG_STATUS_RIPV) {
mce_wrmsrl(MSR_IA32_MCG_STATUS, 0);
return true;
@@ -1279,9 +1290,10 @@ void do_machine_check(struct pt_regs *regs, long error_code)
/*
* Check if this MCE is signaled to only this logical processor,
- * on Intel only.
+ * on Intel, Zhaoxin only.
*/
- if (m.cpuvendor == X86_VENDOR_INTEL)
+ if (m.cpuvendor == X86_VENDOR_INTEL ||
+ m.cpuvendor == X86_VENDOR_ZHAOXIN)
lmce = m.mcgstatus & MCG_STATUS_LMCES;
/*
@@ -1795,9 +1807,15 @@ void mce_zhaoxin_feature_init(struct cpuinfo_x86 *c)
}
intel_init_cmci();
+ intel_init_lmce();
mce_adjust_timer = cmci_intel_adjust_timer;
}
+void mce_zhaoxin_feature_clear(struct cpuinfo_x86 *c)
+{
+ intel_clear_lmce();
+}
+
static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
{
switch (c->x86_vendor) {
@@ -1834,6 +1852,9 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c)
case X86_VENDOR_INTEL:
mce_intel_feature_clear(c);
break;
+ case X86_VENDOR_ZHAOXIN:
+ mce_zhaoxin_feature_clear(c);
+ break;
default:
break;
}
--
2.7.4
next reply other threads:[~2019-09-09 10:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-09 10:21 Tony W Wang-oc [this message]
2019-09-09 15:49 ` [PATCH v1 4/4] x86/mce: Add Zhaoxin LMCE support kbuild test robot
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