From: LeoLiu-oc LeoLiu-oc@zhaoxin.com
mainline inclusion from mainline-5.5 commit 70f0c230031dfef3c9b3e37b2a8c18d3f7186fb2 category: x86/mce bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=19 CVE: NA
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Add support for more Zhaoxin CPUs.
Newer Zhaoxin CPUs support LMCE compatible with Intel. Add support for that.
[ bp: Export functions and massage. ]
Signed-off-by: Tony W Wang-oc TonyWWang-oc@zhaoxin.com Signed-off-by: Borislav Petkov bp@suse.de Cc: CooperYan@zhaoxin.com Cc: DavidWang@zhaoxin.com Cc: HerryYang@zhaoxin.com Cc: "H. Peter Anvin" hpa@zytor.com Cc: Ingo Molnar mingo@redhat.com Cc: linux-edac linux-edac@vger.kernel.org Cc: QiyuanWang@zhaoxin.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Tony Luck tony.luck@intel.com Cc: x86-ml x86@kernel.org Link: https://lkml.kernel.org/r/1568787573-1297-5-git-send-email-TonyWWang-oc@zhao... Signed-off-by: LeoLiu-oc LeoLiu-oc@zhaoxin.com Signed-off-by: Cheng Jian cj.chengjian@huawei.com --- arch/x86/kernel/cpu/mce/core.c | 25 +++++++++++++++++++++++-- arch/x86/kernel/cpu/mce/intel.c | 4 ++-- arch/x86/kernel/cpu/mce/internal.h | 4 ++++ 3 files changed, 29 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 3061ea6cc4fe..31aa078650bb 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -1118,6 +1118,13 @@ 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 || + boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR) { + if (mcgstatus & MCG_STATUS_LMCES) + return false; + } + if (mcgstatus & MCG_STATUS_RIPV) { mce_wrmsrl(MSR_IA32_MCG_STATUS, 0); return true; @@ -1267,9 +1274,11 @@ 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 || + m.cpuvendor == X86_VENDOR_CENTAUR) lmce = m.mcgstatus & MCG_STATUS_LMCES;
/* @@ -1738,9 +1747,15 @@ static void mce_zhaoxin_feature_init(struct cpuinfo_x86 *c) }
intel_init_cmci(); + intel_init_lmce(); mce_adjust_timer = cmci_intel_adjust_timer; }
+static 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) { @@ -1774,6 +1789,12 @@ static void __mcheck_cpu_clear_vendor(struct cpuinfo_x86 *c) case X86_VENDOR_INTEL: mce_intel_feature_clear(c); break; + + case X86_VENDOR_ZHAOXIN: + case X86_VENDOR_CENTAUR: + mce_zhaoxin_feature_clear(c); + break; + default: break; } diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c index 94c688bf0658..03b090331134 100644 --- a/arch/x86/kernel/cpu/mce/intel.c +++ b/arch/x86/kernel/cpu/mce/intel.c @@ -445,7 +445,7 @@ void intel_init_cmci(void) cmci_recheck(); }
-static void intel_init_lmce(void) +void intel_init_lmce(void) { u64 val;
@@ -458,7 +458,7 @@ static void intel_init_lmce(void) wrmsrl(MSR_IA32_MCG_EXT_CTL, val | MCG_EXT_CTL_LMCE_EN); }
-static void intel_clear_lmce(void) +void intel_clear_lmce(void) { u64 val;
diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h index 99d73d18f2c4..22e8aa8c8fe7 100644 --- a/arch/x86/kernel/cpu/mce/internal.h +++ b/arch/x86/kernel/cpu/mce/internal.h @@ -53,12 +53,16 @@ bool mce_intel_cmci_poll(void); void mce_intel_hcpu_update(unsigned long cpu); void cmci_disable_bank(int bank); void intel_init_cmci(void); +void intel_init_lmce(void); +void intel_clear_lmce(void); #else # define cmci_intel_adjust_timer mce_adjust_timer_default static inline bool mce_intel_cmci_poll(void) { return false; } static inline void mce_intel_hcpu_update(unsigned long cpu) { } static inline void cmci_disable_bank(int bank) { } static inline void intel_init_cmci(void) { } +static inline void intel_init_lmce(void) { } +static inline void intel_clear_lmce(void) { } #endif
void mce_timer_kick(unsigned long interval);