From 43eaa2a1ad70d72876cdbb2eb5450a2665e4770f Mon Sep 17 00:00:00 2001 From: Aravind Gopalakrishnan Date: Mon, 23 Mar 2015 10:42:53 -0500 Subject: [PATCH] x86/mce: Define mce_severity function pointer Rename mce_severity() to mce_severity_intel() and assign the mce_severity function pointer to mce_severity_amd() during init on AMD. This way, we can avoid a test to call mce_severity_amd every time we get into mce_severity(). And it's cleaner to do it this way. Signed-off-by: Aravind Gopalakrishnan Suggested-by: Tony Luck Cc: Thomas Gleixner Cc: Ingo Molnar Cc: H. Peter Anvin Cc: Chen Yucong Cc: Andy Lutomirski Cc: linux-edac Link: http://lkml.kernel.org/r/1427125373-2918-3-git-send-email-Aravind.Gopalakrishnan@amd.com Signed-off-by: Borislav Petkov --- arch/x86/include/asm/mce.h | 2 ++ arch/x86/kernel/cpu/mcheck/mce-internal.h | 2 +- arch/x86/kernel/cpu/mcheck/mce-severity.c | 19 ++++++++++++++----- arch/x86/kernel/cpu/mcheck/mce.c | 1 + 4 files changed, 18 insertions(+), 6 deletions(-) diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index b574fbf62d39..1f5a86d518db 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -134,9 +134,11 @@ extern int mce_p5_enabled; #ifdef CONFIG_X86_MCE int mcheck_init(void); void mcheck_cpu_init(struct cpuinfo_x86 *c); +void mcheck_vendor_init_severity(void); #else static inline int mcheck_init(void) { return 0; } static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {} +static inline void mcheck_vendor_init_severity(void) {} #endif #ifdef CONFIG_X86_ANCIENT_MCE diff --git a/arch/x86/kernel/cpu/mcheck/mce-internal.h b/arch/x86/kernel/cpu/mcheck/mce-internal.h index e12f0bfb45c1..fe32074b865b 100644 --- a/arch/x86/kernel/cpu/mcheck/mce-internal.h +++ b/arch/x86/kernel/cpu/mcheck/mce-internal.h @@ -24,7 +24,7 @@ struct mce_bank { char attrname[ATTR_LEN]; /* attribute name */ }; -int mce_severity(struct mce *a, int tolerant, char **msg, bool is_excp); +extern int (*mce_severity)(struct mce *a, int tolerant, char **msg, bool is_excp); struct dentry *mce_get_debugfs_dir(void); extern struct mce_bank *mce_banks; diff --git a/arch/x86/kernel/cpu/mcheck/mce-severity.c b/arch/x86/kernel/cpu/mcheck/mce-severity.c index e16f3f201e06..155c9261d3ef 100644 --- a/arch/x86/kernel/cpu/mcheck/mce-severity.c +++ b/arch/x86/kernel/cpu/mcheck/mce-severity.c @@ -190,8 +190,10 @@ static int error_context(struct mce *m) * See AMD Error Scope Hierarchy table in a newer BKDG. For example * 49125_15h_Models_30h-3Fh_BKDG.pdf, section "RAS Features" */ -static int mce_severity_amd(struct mce *m, enum context ctx) +static int mce_severity_amd(struct mce *m, int tolerant, char **msg, bool is_excp) { + enum context ctx = error_context(m); + /* Processor Context Corrupt, no need to fumble too much, die! */ if (m->status & MCI_STATUS_PCC) return MCE_PANIC_SEVERITY; @@ -239,15 +241,12 @@ static int mce_severity_amd(struct mce *m, enum context ctx) return MCE_KEEP_SEVERITY; } -int mce_severity(struct mce *m, int tolerant, char **msg, bool is_excp) +static int mce_severity_intel(struct mce *m, int tolerant, char **msg, bool is_excp) { enum exception excp = (is_excp ? EXCP_CONTEXT : NO_EXCP); enum context ctx = error_context(m); struct severity *s; - if (m->cpuvendor == X86_VENDOR_AMD) - return mce_severity_amd(m, ctx); - for (s = severities;; s++) { if ((m->status & s->mask) != s->result) continue; @@ -272,6 +271,16 @@ int mce_severity(struct mce *m, int tolerant, char **msg, bool is_excp) } } +/* Default to mce_severity_intel */ +int (*mce_severity)(struct mce *m, int tolerant, char **msg, bool is_excp) = + mce_severity_intel; + +void __init mcheck_vendor_init_severity(void) +{ + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) + mce_severity = mce_severity_amd; +} + #ifdef CONFIG_DEBUG_FS static void *s_start(struct seq_file *f, loff_t *pos) { diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 1189f1150a19..c7df30748629 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -2026,6 +2026,7 @@ __setup("mce", mcheck_enable); int __init mcheck_init(void) { mcheck_intel_therm_init(); + mcheck_vendor_init_severity(); return 0; } -- 2.39.5