4 #include <linux/types.h>
5 #include <asm/ioctls.h>
8 * Machine Check support for x86
11 #define MCG_BANKCNT_MASK 0xff /* Number of Banks */
12 #define MCG_CTL_P (1ULL<<8) /* MCG_CAP register available */
13 #define MCG_EXT_P (1ULL<<9) /* Extended registers available */
14 #define MCG_CMCI_P (1ULL<<10) /* CMCI supported */
15 #define MCG_EXT_CNT_MASK 0xff0000 /* Number of Extended registers */
16 #define MCG_EXT_CNT_SHIFT 16
17 #define MCG_EXT_CNT(c) (((c) & MCG_EXT_CNT_MASK) >> MCG_EXT_CNT_SHIFT)
19 #define MCG_STATUS_RIPV (1ULL<<0) /* restart ip valid */
20 #define MCG_STATUS_EIPV (1ULL<<1) /* ip points to correct instruction */
21 #define MCG_STATUS_MCIP (1ULL<<2) /* machine check in progress */
23 #define MCI_STATUS_VAL (1ULL<<63) /* valid error */
24 #define MCI_STATUS_OVER (1ULL<<62) /* previous errors lost */
25 #define MCI_STATUS_UC (1ULL<<61) /* uncorrected error */
26 #define MCI_STATUS_EN (1ULL<<60) /* error enabled */
27 #define MCI_STATUS_MISCV (1ULL<<59) /* misc error reg. valid */
28 #define MCI_STATUS_ADDRV (1ULL<<58) /* addr reg. valid */
29 #define MCI_STATUS_PCC (1ULL<<57) /* processor context corrupt */
31 /* Fields are zero when not available */
38 __u64 tsc
; /* cpu time stamp counter */
39 __u64 res1
; /* for future extension */
40 __u64 res2
; /* dito. */
41 __u8 cs
; /* code segment */
42 __u8 bank
; /* machine check bank */
43 __u8 cpu
; /* cpu that raised the error */
44 __u8 finished
; /* entry is valid */
49 * This structure contains all data related to the MCE log. Also
50 * carries a signature to make it easier to find from external
51 * debugging tools. Each entry is only valid when its finished flag
55 #define MCE_LOG_LEN 32
58 char signature
[12]; /* "MACHINECHECK" */
59 unsigned len
; /* = MCE_LOG_LEN */
63 struct mce entry
[MCE_LOG_LEN
];
66 #define MCE_OVERFLOW 0 /* bit 0 in flags means overflow */
68 #define MCE_LOG_SIGNATURE "MACHINECHECK"
70 #define MCE_GET_RECORD_LEN _IOR('M', 1, int)
71 #define MCE_GET_LOG_LEN _IOR('M', 2, int)
72 #define MCE_GETCLEAR_FLAGS _IOR('M', 3, int)
74 /* Software defined banks */
75 #define MCE_EXTENDED_BANK 128
76 #define MCE_THERMAL_BANK MCE_EXTENDED_BANK + 0
78 #define K8_MCE_THRESHOLD_BASE (MCE_EXTENDED_BANK + 1) /* MCE_AMD */
79 #define K8_MCE_THRESHOLD_BANK_0 (MCE_THRESHOLD_BASE + 0 * 9)
80 #define K8_MCE_THRESHOLD_BANK_1 (MCE_THRESHOLD_BASE + 1 * 9)
81 #define K8_MCE_THRESHOLD_BANK_2 (MCE_THRESHOLD_BASE + 2 * 9)
82 #define K8_MCE_THRESHOLD_BANK_3 (MCE_THRESHOLD_BASE + 3 * 9)
83 #define K8_MCE_THRESHOLD_BANK_4 (MCE_THRESHOLD_BASE + 4 * 9)
84 #define K8_MCE_THRESHOLD_BANK_5 (MCE_THRESHOLD_BASE + 5 * 9)
85 #define K8_MCE_THRESHOLD_DRAM_ECC (MCE_THRESHOLD_BANK_4 + 0)
89 extern int mce_disabled
;
91 #include <asm/atomic.h>
93 void mce_setup(struct mce
*m
);
94 void mce_log(struct mce
*m
);
95 DECLARE_PER_CPU(struct sys_device
, mce_dev
);
96 extern void (*threshold_cpu_callback
)(unsigned long action
, unsigned int cpu
);
99 * To support more than 128 would need to escape the predefined
100 * Linux defined extended banks first.
102 #define MAX_NR_BANKS (MCE_EXTENDED_BANK - 1)
104 #ifdef CONFIG_X86_MCE_INTEL
105 void mce_intel_feature_init(struct cpuinfo_x86
*c
);
106 void cmci_clear(void);
107 void cmci_reenable(void);
108 void cmci_rediscover(int dying
);
109 void cmci_recheck(void);
111 static inline void mce_intel_feature_init(struct cpuinfo_x86
*c
) { }
112 static inline void cmci_clear(void) {}
113 static inline void cmci_reenable(void) {}
114 static inline void cmci_rediscover(int dying
) {}
115 static inline void cmci_recheck(void) {}
118 #ifdef CONFIG_X86_MCE_AMD
119 void mce_amd_feature_init(struct cpuinfo_x86
*c
);
121 static inline void mce_amd_feature_init(struct cpuinfo_x86
*c
) { }
124 extern int mce_available(struct cpuinfo_x86
*c
);
126 void mce_log_therm_throt_event(__u64 status
);
128 extern atomic_t mce_entry
;
130 extern void do_machine_check(struct pt_regs
*, long);
132 typedef DECLARE_BITMAP(mce_banks_t
, MAX_NR_BANKS
);
133 DECLARE_PER_CPU(mce_banks_t
, mce_poll_banks
);
136 MCP_TIMESTAMP
= (1 << 0), /* log time stamp */
137 MCP_UC
= (1 << 1), /* log uncorrected errors */
138 MCP_DONTLOG
= (1 << 2), /* only clear, don't log */
140 extern void machine_check_poll(enum mcp_flags flags
, mce_banks_t
*b
);
142 extern int mce_notify_user(void);
144 DECLARE_PER_CPU(struct mce
, injectm
);
145 extern struct file_operations mce_chrdev_ops
;
147 #ifdef CONFIG_X86_MCE
148 extern void mcheck_init(struct cpuinfo_x86
*c
);
150 #define mcheck_init(c) do { } while (0)
153 extern void (*mce_threshold_vector
)(void);
155 #endif /* __KERNEL__ */
156 #endif /* _ASM_X86_MCE_H */