[ck] [patch v1 3/3] x86/mce: Add Zhaoxin LMCE support

commit 70f0c230031dfef3c9b3e37b2a8c18d3f7186fb2 upstream. 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(a)zhaoxin.com> Signed-off-by: Borislav Petkov <bp(a)suse.de> Cc: CooperYan(a)zhaoxin.com Cc: DavidWang(a)zhaoxin.com Cc: HerryYang(a)zhaoxin.com Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: linux-edac <linux-edac(a)vger.kernel.org> Cc: QiyuanWang(a)zhaoxin.com Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Tony Luck <tony.luck(a)intel.com> Cc: x86-ml <x86(a)kernel.org> Link: https://lkml.kernel.org/r/1568787573-1297-5-git-send-email-TonyWWang-oc@zha… [ LeoLiu-oc: Add support for more Zhaoxin CPUs and adapt to the current MCE directory ] Signed-off-by: LeoLiu-oc <LeoLiu-oc(a)zhaoxin.com> --- arch/x86/kernel/cpu/mcheck/mce-internal.h | 4 ++++ arch/x86/kernel/cpu/mcheck/mce.c | 25 +++++++++++++++++++++-- arch/x86/kernel/cpu/mcheck/mce_intel.c | 4 ++-- 3 files changed, 29 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/cpu/mcheck/mce-internal.h b/arch/x86/kernel/cpu/mcheck/mce-internal.h index 79936eaec14b..6bc9d8991efa 100644 --- a/arch/x86/kernel/cpu/mcheck/mce-internal.h +++ b/arch/x86/kernel/cpu/mcheck/mce-internal.h @@ -54,12 +54,16 @@ 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); diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index ace64069152d..95267d1d458f 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -1099,6 +1099,13 @@ static bool mce_check_crashing_cpu(void) 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; @@ -1285,9 +1292,11 @@ 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; /* @@ -1762,9 +1771,15 @@ 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) { @@ -1798,6 +1813,12 @@ 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/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c index 637780528380..3bc5d6d47178 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_intel.c +++ b/arch/x86/kernel/cpu/mcheck/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; -- 2.20.1