Messages in this thread Patch in this message | | | From | Tony Luck <> | Subject | [PATCH v2 3/5] x86/mce: Introduce mce_handle_storm() to deal with begin/end of storms | Date | Mon, 27 Jun 2022 10:36:03 -0700 |
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From: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
Intel and AMD need to take different actions when a storm begins or ends. Prepare for the storm code moving from intel.c into core.c by adding a function that checks CPU vendor to pick the right action.
No functional changes.
[Tony: Changed from function pointer to regular function]
Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com> Signed-off-by: Tony Luck <tony.luck@intel.com> --- arch/x86/kernel/cpu/mce/core.c | 9 +++++++++ arch/x86/kernel/cpu/mce/intel.c | 12 ++++++++++-- arch/x86/kernel/cpu/mce/internal.h | 3 +++ 3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 776d4724b1e0..f4d2a7ba29f7 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -1985,6 +1985,15 @@ static void mce_zhaoxin_feature_clear(struct cpuinfo_x86 *c) intel_clear_lmce(); } +void mce_handle_storm(int bank, bool on) +{ + switch (boot_cpu_data.x86_vendor) { + case X86_VENDOR_INTEL: + mce_intel_handle_storm(bank, on); + break; + } +} + static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c) { switch (c->x86_vendor) { diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c index 4106877de028..4238b73c2143 100644 --- a/arch/x86/kernel/cpu/mce/intel.c +++ b/arch/x86/kernel/cpu/mce/intel.c @@ -152,6 +152,14 @@ static void cmci_set_threshold(int bank, int thresh) raw_spin_unlock_irqrestore(&cmci_discover_lock, flags); } +void mce_intel_handle_storm(int bank, bool on) +{ + if (on) + cmci_set_threshold(bank, cmci_threshold[bank]); + else + cmci_set_threshold(bank, CMCI_STORM_THRESHOLD); +} + static void cmci_storm_begin(int bank) { __set_bit(bank, this_cpu_ptr(mce_poll_banks)); @@ -211,13 +219,13 @@ void track_cmci_storm(int bank, u64 status) if (history & GENMASK_ULL(STORM_END_POLL_THRESHOLD - 1, 0)) return; pr_notice("CPU%d BANK%d CMCI storm subsided\n", smp_processor_id(), bank); - cmci_set_threshold(bank, cmci_threshold[bank]); + mce_handle_storm(bank, true); cmci_storm_end(bank); } else { if (hweight64(history) < STORM_BEGIN_THRESHOLD) return; pr_notice("CPU%d BANK%d CMCI storm detected\n", smp_processor_id(), bank); - cmci_set_threshold(bank, CMCI_STORM_THRESHOLD); + mce_handle_storm(bank, false); cmci_storm_begin(bank); } } diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h index ab451526f6df..78467f6cdd04 100644 --- a/arch/x86/kernel/cpu/mce/internal.h +++ b/arch/x86/kernel/cpu/mce/internal.h @@ -43,12 +43,14 @@ extern mce_banks_t mce_banks_ce_disabled; void track_cmci_storm(int bank, u64 status); #ifdef CONFIG_X86_MCE_INTEL +void mce_intel_handle_storm(int bank, bool on); void cmci_disable_bank(int bank); void intel_init_cmci(void); void intel_init_lmce(void); void intel_clear_lmce(void); bool intel_filter_mce(struct mce *m); #else +static inline void mce_intel_handle_storm(int bank, bool on) { } static inline void cmci_disable_bank(int bank) { } static inline void intel_init_cmci(void) { } static inline void intel_init_lmce(void) { } @@ -57,6 +59,7 @@ static inline bool intel_filter_mce(struct mce *m) { return false; } #endif void mce_timer_kick(bool storm); +void mce_handle_storm(int bank, bool on); #ifdef CONFIG_ACPI_APEI int apei_write_mce(struct mce *m); -- 2.35.3
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