arch/x86/include/asm/mce.h

   1 #ifndef _ASM_X86_MCE_H
   2 #define _ASM_X86_MCE_H
   3
   4 #include <uapi/asm/mce.h>
   5
   6 /*
   7  * Machine Check support for x86
   8  */
   9
  10 /* MCG_CAP register defines */
  11 #define MCG_BANKCNT_MASK        0xff         /* Number of Banks */
  12 #define MCG_CTL_P               (1ULL<<8)    /* MCG_CTL 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)
  18 #define MCG_SER_P               (1ULL<<24)   /* MCA recovery/new status bits */
  19
  20 /* MCG_STATUS register defines */
  21 #define MCG_STATUS_RIPV  (1ULL<<0)   /* restart ip valid */
  22 #define MCG_STATUS_EIPV  (1ULL<<1)   /* ip points to correct instruction */
  23 #define MCG_STATUS_MCIP  (1ULL<<2)   /* machine check in progress */
  24
  25 /* MCi_STATUS register defines */
  26 #define MCI_STATUS_VAL   (1ULL<<63)  /* valid error */
  27 #define MCI_STATUS_OVER  (1ULL<<62)  /* previous errors lost */
  28 #define MCI_STATUS_UC    (1ULL<<61)  /* uncorrected error */
  29 #define MCI_STATUS_EN    (1ULL<<60)  /* error enabled */
  30 #define MCI_STATUS_MISCV (1ULL<<59)  /* misc error reg. valid */
  31 #define MCI_STATUS_ADDRV (1ULL<<58)  /* addr reg. valid */
  32 #define MCI_STATUS_PCC   (1ULL<<57)  /* processor context corrupt */
  33 #define MCI_STATUS_S     (1ULL<<56)  /* Signaled machine check */
  34 #define MCI_STATUS_AR    (1ULL<<55)  /* Action required */
  35 #define MCACOD            0xffff     /* MCA Error Code */
  36
  37 /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */
  38 #define MCACOD_SCRUB    0x00C0  /* 0xC0-0xCF Memory Scrubbing */
  39 #define MCACOD_SCRUBMSK 0xfff0
  40 #define MCACOD_L3WB     0x017A  /* L3 Explicit Writeback */
  41 #define MCACOD_DATA     0x0134  /* Data Load */
  42 #define MCACOD_INSTR    0x0150  /* Instruction Fetch */
  43
  44 /* MCi_MISC register defines */
  45 #define MCI_MISC_ADDR_LSB(m)    ((m) & 0x3f)
  46 #define MCI_MISC_ADDR_MODE(m)   (((m) >> 6) & 7)
  47 #define  MCI_MISC_ADDR_SEGOFF   0       /* segment offset */
  48 #define  MCI_MISC_ADDR_LINEAR   1       /* linear address */
  49 #define  MCI_MISC_ADDR_PHYS     2       /* physical address */
  50 #define  MCI_MISC_ADDR_MEM      3       /* memory address */
  51 #define  MCI_MISC_ADDR_GENERIC  7       /* generic */
  52
  53 /* CTL2 register defines */
  54 #define MCI_CTL2_CMCI_EN                (1ULL << 30)
  55 #define MCI_CTL2_CMCI_THRESHOLD_MASK    0x7fffULL
  56
  57 #define MCJ_CTX_MASK            3
  58 #define MCJ_CTX(flags)          ((flags) & MCJ_CTX_MASK)
  59 #define MCJ_CTX_RANDOM          0    /* inject context: random */
  60 #define MCJ_CTX_PROCESS         0x1  /* inject context: process */
  61 #define MCJ_CTX_IRQ             0x2  /* inject context: IRQ */
  62 #define MCJ_NMI_BROADCAST       0x4  /* do NMI broadcasting */
  63 #define MCJ_EXCEPTION           0x8  /* raise as exception */
  64 #define MCJ_IRQ_BRAODCAST       0x10 /* do IRQ broadcasting */
  65
  66 #define MCE_OVERFLOW 0          /* bit 0 in flags means overflow */
  67
  68 /* Software defined banks */
  69 #define MCE_EXTENDED_BANK       128
  70 #define MCE_THERMAL_BANK        (MCE_EXTENDED_BANK + 0)
  71 #define K8_MCE_THRESHOLD_BASE   (MCE_EXTENDED_BANK + 1)
  72
  73 #define MCE_LOG_LEN 32
  74 #define MCE_LOG_SIGNATURE       "MACHINECHECK"
  75
  76 /*
  77  * This structure contains all data related to the MCE log.  Also
  78  * carries a signature to make it easier to find from external
  79  * debugging tools.  Each entry is only valid when its finished flag
  80  * is set.
  81  */
  82 struct mce_log {
  83         char signature[12]; /* "MACHINECHECK" */
  84         unsigned len;       /* = MCE_LOG_LEN */
  85         unsigned next;
  86         unsigned flags;
  87         unsigned recordlen;     /* length of struct mce */
  88         struct mce entry[MCE_LOG_LEN];
  89 };
  90
  91 struct mca_config {
  92         bool dont_log_ce;
  93         bool cmci_disabled;
  94         bool ignore_ce;
  95         bool disabled;
  96         bool ser;
  97         bool bios_cmci_threshold;
  98         u8 banks;
  99         s8 bootlog;
 100         int tolerant;
 101         int monarch_timeout;
 102         int panic_timeout;
 103         u32 rip_msr;
 104 };
 105
 106 extern struct mca_config mca_cfg;
 107 extern void mce_register_decode_chain(struct notifier_block *nb);
 108 extern void mce_unregister_decode_chain(struct notifier_block *nb);
 109
 110 #include <linux/percpu.h>
 111 #include <linux/init.h>
 112 #include <linux/atomic.h>
 113
 114 extern int mce_p5_enabled;
 115
 116 #ifdef CONFIG_X86_MCE
 117 int mcheck_init(void);
 118 void mcheck_cpu_init(struct cpuinfo_x86 *c);
 119 #else
 120 static inline int mcheck_init(void) { return 0; }
 121 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {}
 122 #endif
 123
 124 #ifdef CONFIG_X86_ANCIENT_MCE
 125 void intel_p5_mcheck_init(struct cpuinfo_x86 *c);
 126 void winchip_mcheck_init(struct cpuinfo_x86 *c);
 127 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; }
 128 #else
 129 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {}
 130 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
 131 static inline void enable_p5_mce(void) {}
 132 #endif
 133
 134 void mce_setup(struct mce *m);
 135 void mce_log(struct mce *m);
 136 DECLARE_PER_CPU(struct device *, mce_device);
 137
 138 /*
 139  * Maximum banks number.
 140  * This is the limit of the current register layout on
 141  * Intel CPUs.
 142  */
 143 #define MAX_NR_BANKS 32
 144
 145 #ifdef CONFIG_X86_MCE_INTEL
 146 void mce_intel_feature_init(struct cpuinfo_x86 *c);
 147 void cmci_clear(void);
 148 void cmci_reenable(void);
 149 void cmci_rediscover(void);
 150 void cmci_recheck(void);
 151 #else
 152 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { }
 153 static inline void cmci_clear(void) {}
 154 static inline void cmci_reenable(void) {}
 155 static inline void cmci_rediscover(void) {}
 156 static inline void cmci_recheck(void) {}
 157 #endif
 158
 159 #ifdef CONFIG_X86_MCE_AMD
 160 void mce_amd_feature_init(struct cpuinfo_x86 *c);
 161 #else
 162 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
 163 #endif
 164
 165 int mce_available(struct cpuinfo_x86 *c);
 166
 167 DECLARE_PER_CPU(unsigned, mce_exception_count);
 168 DECLARE_PER_CPU(unsigned, mce_poll_count);
 169
 170 extern atomic_t mce_entry;
 171
 172 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
 173 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
 174
 175 enum mcp_flags {
 176         MCP_TIMESTAMP = (1 << 0),       /* log time stamp */
 177         MCP_UC = (1 << 1),              /* log uncorrected errors */
 178         MCP_DONTLOG = (1 << 2),         /* only clear, don't log */
 179 };
 180 void machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
 181
 182 int mce_notify_irq(void);
 183 void mce_notify_process(void);
 184
 185 DECLARE_PER_CPU(struct mce, injectm);
 186
 187 extern void register_mce_write_callback(ssize_t (*)(struct file *filp,
 188                                     const char __user *ubuf,
 189                                     size_t usize, loff_t *off));
 190
 191 /*
 192  * Exception handler
 193  */
 194
 195 /* Call the installed machine check handler for this CPU setup. */
 196 extern void (*machine_check_vector)(struct pt_regs *, long error_code);
 197 void do_machine_check(struct pt_regs *, long);
 198
 199 /*
 200  * Threshold handler
 201  */
 202
 203 extern void (*mce_threshold_vector)(void);
 204 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
 205
 206 /*
 207  * Thermal handler
 208  */
 209
 210 void intel_init_thermal(struct cpuinfo_x86 *c);
 211
 212 void mce_log_therm_throt_event(__u64 status);
 213
 214 /* Interrupt Handler for core thermal thresholds */
 215 extern int (*platform_thermal_notify)(__u64 msr_val);
 216
 217 #ifdef CONFIG_X86_THERMAL_VECTOR
 218 extern void mcheck_intel_therm_init(void);
 219 #else
 220 static inline void mcheck_intel_therm_init(void) { }
 221 #endif
 222
 223 /*
 224  * Used by APEI to report memory error via /dev/mcelog
 225  */
 226
 227 struct cper_sec_mem_err;
 228 extern void apei_mce_report_mem_error(int corrected,
 229                                       struct cper_sec_mem_err *mem_err);
 230
 231 #endif /* _ASM_X86_MCE_H */