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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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553f265fe8
Machine checks can stall the machine for a long time and it's not good to trigger the nmi watchdog during that. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
#ifndef _ASM_MCE_H
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#define _ASM_MCE_H 1
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#include <asm/ioctls.h>
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#include <asm/types.h>
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/*
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* Machine Check support for x86
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*/
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#define MCG_CTL_P (1UL<<8) /* MCG_CAP register available */
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#define MCG_STATUS_RIPV (1UL<<0) /* restart ip valid */
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#define MCG_STATUS_EIPV (1UL<<1) /* eip points to correct instruction */
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#define MCG_STATUS_MCIP (1UL<<2) /* machine check in progress */
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#define MCI_STATUS_VAL (1UL<<63) /* valid error */
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#define MCI_STATUS_OVER (1UL<<62) /* previous errors lost */
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#define MCI_STATUS_UC (1UL<<61) /* uncorrected error */
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#define MCI_STATUS_EN (1UL<<60) /* error enabled */
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#define MCI_STATUS_MISCV (1UL<<59) /* misc error reg. valid */
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#define MCI_STATUS_ADDRV (1UL<<58) /* addr reg. valid */
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#define MCI_STATUS_PCC (1UL<<57) /* processor context corrupt */
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/* Fields are zero when not available */
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struct mce {
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__u64 status;
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__u64 misc;
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__u64 addr;
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__u64 mcgstatus;
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__u64 rip;
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__u64 tsc; /* cpu time stamp counter */
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__u64 res1; /* for future extension */
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__u64 res2; /* dito. */
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__u8 cs; /* code segment */
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__u8 bank; /* machine check bank */
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__u8 cpu; /* cpu that raised the error */
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__u8 finished; /* entry is valid */
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__u32 pad;
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};
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/*
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* This structure contains all data related to the MCE log.
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* Also carries a signature to make it easier to find from external debugging tools.
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* Each entry is only valid when its finished flag is set.
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*/
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#define MCE_LOG_LEN 32
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struct mce_log {
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char signature[12]; /* "MACHINECHECK" */
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unsigned len; /* = MCE_LOG_LEN */
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unsigned next;
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unsigned flags;
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unsigned pad0;
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struct mce entry[MCE_LOG_LEN];
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};
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#define MCE_OVERFLOW 0 /* bit 0 in flags means overflow */
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#define MCE_LOG_SIGNATURE "MACHINECHECK"
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#define MCE_GET_RECORD_LEN _IOR('M', 1, int)
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#define MCE_GET_LOG_LEN _IOR('M', 2, int)
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#define MCE_GETCLEAR_FLAGS _IOR('M', 3, int)
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/* Software defined banks */
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#define MCE_EXTENDED_BANK 128
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#define MCE_THERMAL_BANK MCE_EXTENDED_BANK + 0
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#define MCE_THRESHOLD_BASE MCE_EXTENDED_BANK + 1 /* MCE_AMD */
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#define MCE_THRESHOLD_DRAM_ECC MCE_THRESHOLD_BASE + 4
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#ifdef __KERNEL__
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#include <asm/atomic.h>
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void mce_log(struct mce *m);
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#ifdef CONFIG_X86_MCE_INTEL
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void mce_intel_feature_init(struct cpuinfo_x86 *c);
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#else
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static inline void mce_intel_feature_init(struct cpuinfo_x86 *c)
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{
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}
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#endif
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#ifdef CONFIG_X86_MCE_AMD
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void mce_amd_feature_init(struct cpuinfo_x86 *c);
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#else
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static inline void mce_amd_feature_init(struct cpuinfo_x86 *c)
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{
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}
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#endif
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extern atomic_t mce_entry;
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#endif
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#endif
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