arch/x86/include/asm/mce.h

   1 #ifndef _ASM_X86_MCE_H
   2 #define _ASM_X86_MCE_H
   3
   4 #ifdef __x86_64__
   5
   6 #include <linux/types.h>
   7 #include <asm/ioctls.h>
   8
   9 /*
  10  * Machine Check support for x86
  11  */
  12
  13 #define MCG_CTL_P        (1UL<<8)   /* MCG_CAP register available */
  14 #define MCG_EXT_P        (1ULL<<9)   /* Extended registers available */
  15 #define MCG_CMCI_P       (1ULL<<10)  /* CMCI supported */
  16
  17 #define MCG_STATUS_RIPV  (1UL<<0)   /* restart ip valid */
  18 #define MCG_STATUS_EIPV  (1UL<<1)   /* ip points to correct instruction */
  19 #define MCG_STATUS_MCIP  (1UL<<2)   /* machine check in progress */
  20
  21 #define MCI_STATUS_VAL   (1UL<<63)  /* valid error */
  22 #define MCI_STATUS_OVER  (1UL<<62)  /* previous errors lost */
  23 #define MCI_STATUS_UC    (1UL<<61)  /* uncorrected error */
  24 #define MCI_STATUS_EN    (1UL<<60)  /* error enabled */
  25 #define MCI_STATUS_MISCV (1UL<<59)  /* misc error reg. valid */
  26 #define MCI_STATUS_ADDRV (1UL<<58)  /* addr reg. valid */
  27 #define MCI_STATUS_PCC   (1UL<<57)  /* processor context corrupt */
  28
  29 /* Fields are zero when not available */
  30 struct mce {
  31         __u64 status;
  32         __u64 misc;
  33         __u64 addr;
  34         __u64 mcgstatus;
  35         __u64 ip;
  36         __u64 tsc;      /* cpu time stamp counter */
  37         __u64 res1;     /* for future extension */
  38         __u64 res2;     /* dito. */
  39         __u8  cs;               /* code segment */
  40         __u8  bank;     /* machine check bank */
  41         __u8  cpu;      /* cpu that raised the error */
  42         __u8  finished;   /* entry is valid */
  43         __u32 pad;
  44 };
  45
  46 /*
  47  * This structure contains all data related to the MCE log.  Also
  48  * carries a signature to make it easier to find from external
  49  * debugging tools.  Each entry is only valid when its finished flag
  50  * is set.
  51  */
  52
  53 #define MCE_LOG_LEN 32
  54
  55 struct mce_log {
  56         char signature[12]; /* "MACHINECHECK" */
  57         unsigned len;       /* = MCE_LOG_LEN */
  58         unsigned next;
  59         unsigned flags;
  60         unsigned pad0;
  61         struct mce entry[MCE_LOG_LEN];
  62 };
  63
  64 #define MCE_OVERFLOW 0          /* bit 0 in flags means overflow */
  65
  66 #define MCE_LOG_SIGNATURE       "MACHINECHECK"
  67
  68 #define MCE_GET_RECORD_LEN   _IOR('M', 1, int)
  69 #define MCE_GET_LOG_LEN      _IOR('M', 2, int)
  70 #define MCE_GETCLEAR_FLAGS   _IOR('M', 3, int)
  71
  72 /* Software defined banks */
  73 #define MCE_EXTENDED_BANK       128
  74 #define MCE_THERMAL_BANK        MCE_EXTENDED_BANK + 0
  75
  76 #define K8_MCE_THRESHOLD_BASE      (MCE_EXTENDED_BANK + 1)      /* MCE_AMD */
  77 #define K8_MCE_THRESHOLD_BANK_0    (MCE_THRESHOLD_BASE + 0 * 9)
  78 #define K8_MCE_THRESHOLD_BANK_1    (MCE_THRESHOLD_BASE + 1 * 9)
  79 #define K8_MCE_THRESHOLD_BANK_2    (MCE_THRESHOLD_BASE + 2 * 9)
  80 #define K8_MCE_THRESHOLD_BANK_3    (MCE_THRESHOLD_BASE + 3 * 9)
  81 #define K8_MCE_THRESHOLD_BANK_4    (MCE_THRESHOLD_BASE + 4 * 9)
  82 #define K8_MCE_THRESHOLD_BANK_5    (MCE_THRESHOLD_BASE + 5 * 9)
  83 #define K8_MCE_THRESHOLD_DRAM_ECC  (MCE_THRESHOLD_BANK_4 + 0)
  84
  85 #endif /* __x86_64__ */
  86
  87 #ifdef __KERNEL__
  88
  89 #ifdef CONFIG_X86_32
  90 extern int mce_disabled;
  91 #else /* CONFIG_X86_32 */
  92
  93 #include <asm/atomic.h>
  94
  95 void mce_setup(struct mce *m);
  96 void mce_log(struct mce *m);
  97 DECLARE_PER_CPU(struct sys_device, device_mce);
  98 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
  99
 100 /*
 101  * To support more than 128 would need to escape the predefined
 102  * Linux defined extended banks first.
 103  */
 104 #define MAX_NR_BANKS (MCE_EXTENDED_BANK - 1)
 105
 106 #ifdef CONFIG_X86_MCE_INTEL
 107 void mce_intel_feature_init(struct cpuinfo_x86 *c);
 108 void cmci_clear(void);
 109 void cmci_reenable(void);
 110 void cmci_rediscover(int dying);
 111 void cmci_recheck(void);
 112 #else
 113 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { }
 114 static inline void cmci_clear(void) {}
 115 static inline void cmci_reenable(void) {}
 116 static inline void cmci_rediscover(int dying) {}
 117 static inline void cmci_recheck(void) {}
 118 #endif
 119
 120 #ifdef CONFIG_X86_MCE_AMD
 121 void mce_amd_feature_init(struct cpuinfo_x86 *c);
 122 #else
 123 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
 124 #endif
 125
 126 extern int mce_available(struct cpuinfo_x86 *c);
 127
 128 void mce_log_therm_throt_event(__u64 status);
 129
 130 extern atomic_t mce_entry;
 131
 132 extern void do_machine_check(struct pt_regs *, long);
 133
 134 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
 135 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
 136
 137 enum mcp_flags {
 138         MCP_TIMESTAMP = (1 << 0),       /* log time stamp */
 139         MCP_UC = (1 << 1),              /* log uncorrected errors */
 140         MCP_DONTLOG = (1 << 2),         /* only clear, don't log */
 141 };
 142 extern void machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
 143
 144 extern int mce_notify_user(void);
 145
 146 #endif /* !CONFIG_X86_32 */
 147
 148 #ifdef CONFIG_X86_MCE
 149 extern void mcheck_init(struct cpuinfo_x86 *c);
 150 #else
 151 #define mcheck_init(c) do { } while (0)
 152 #endif
 153
 154 extern void (*mce_threshold_vector)(void);
 155
 156 #endif /* __KERNEL__ */
 157 #endif /* _ASM_X86_MCE_H */