From: Yazen Ghannam Date: Mon, 25 Aug 2025 17:33:03 +0000 (+0000) Subject: x86/mce: Remove __mcheck_cpu_init_early() X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9f34032ec0deef58bd0eb7475f1981adfa998648;p=thirdparty%2Fkernel%2Fstable.git x86/mce: Remove __mcheck_cpu_init_early() The __mcheck_cpu_init_early() function was introduced so that some vendor-specific features are detected before the first MCA polling event done in __mcheck_cpu_init_generic(). Currently, __mcheck_cpu_init_early() is only used on AMD-based systems and additional code will be needed to support various system configurations. However, the current and future vendor-specific code should be done during vendor init. This keeps all the vendor code in a common location and simplifies the generic init flow. Move all the __mcheck_cpu_init_early() code into mce_amd_feature_init(). Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Qiuxu Zhuo Reviewed-by: Tony Luck Reviewed-by: Nikolay Borisov Tested-by: Tony Luck Link: https://lore.kernel.org/20250825-wip-mca-updates-v5-6-865768a2eef8@amd.com --- diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c index e9b9be2215edf..aa13c9304ad89 100644 --- a/arch/x86/kernel/cpu/mce/amd.c +++ b/arch/x86/kernel/cpu/mce/amd.c @@ -653,6 +653,10 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c) u32 low = 0, high = 0, address = 0; int offset = -1; + mce_flags.overflow_recov = cpu_feature_enabled(X86_FEATURE_OVERFLOW_RECOV); + mce_flags.succor = cpu_feature_enabled(X86_FEATURE_SUCCOR); + mce_flags.smca = cpu_feature_enabled(X86_FEATURE_SMCA); + mce_flags.amd_threshold = 1; for (bank = 0; bank < this_cpu_read(mce_num_banks); ++bank) { if (mce_flags.smca) diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 311876e3f3f47..0326fbb83adc5 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -2034,19 +2034,6 @@ static bool __mcheck_cpu_ancient_init(struct cpuinfo_x86 *c) return false; } -/* - * Init basic CPU features needed for early decoding of MCEs. - */ -static void __mcheck_cpu_init_early(struct cpuinfo_x86 *c) -{ - if (c->x86_vendor == X86_VENDOR_AMD || c->x86_vendor == X86_VENDOR_HYGON) { - mce_flags.overflow_recov = !!cpu_has(c, X86_FEATURE_OVERFLOW_RECOV); - mce_flags.succor = !!cpu_has(c, X86_FEATURE_SUCCOR); - mce_flags.smca = !!cpu_has(c, X86_FEATURE_SMCA); - mce_flags.amd_threshold = 1; - } -} - static void mce_centaur_feature_init(struct cpuinfo_x86 *c) { struct mca_config *cfg = &mca_cfg; @@ -2285,7 +2272,6 @@ void mcheck_cpu_init(struct cpuinfo_x86 *c) mca_cfg.initialized = 1; - __mcheck_cpu_init_early(c); __mcheck_cpu_init_generic(); __mcheck_cpu_init_vendor(c); __mcheck_cpu_init_prepare_banks();