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 }; 141 extern void machine_check_poll(enum mcp_flags flags, mce_banks_t *b); 142 143 extern int mce_notify_user(void); 144 145 #endif /* !CONFIG_X86_32 */ 146 147 #ifdef CONFIG_X86_MCE 148 extern void mcheck_init(struct cpuinfo_x86 *c); 149 #else 150 #define mcheck_init(c) do { } while (0) 151 #endif 152 153 extern void (*mce_threshold_vector)(void); 154 155 #endif /* __KERNEL__ */ 156 #endif /* _ASM_X86_MCE_H */ 157