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 #define MCG_ELOG_P              (1ULL<<26)   /* Extended error log supported */
  20
  21 /* MCG_STATUS register defines */
  22 #define MCG_STATUS_RIPV  (1ULL<<0)   /* restart ip valid */
  23 #define MCG_STATUS_EIPV  (1ULL<<1)   /* ip points to correct instruction */
  24 #define MCG_STATUS_MCIP  (1ULL<<2)   /* machine check in progress */
  25
  26 /* MCi_STATUS register defines */
  27 #define MCI_STATUS_VAL   (1ULL<<63)  /* valid error */
  28 #define MCI_STATUS_OVER  (1ULL<<62)  /* previous errors lost */
  29 #define MCI_STATUS_UC    (1ULL<<61)  /* uncorrected error */
  30 #define MCI_STATUS_EN    (1ULL<<60)  /* error enabled */
  31 #define MCI_STATUS_MISCV (1ULL<<59)  /* misc error reg. valid */
  32 #define MCI_STATUS_ADDRV (1ULL<<58)  /* addr reg. valid */
  33 #define MCI_STATUS_PCC   (1ULL<<57)  /* processor context corrupt */
  34 #define MCI_STATUS_S     (1ULL<<56)  /* Signaled machine check */
  35 #define MCI_STATUS_AR    (1ULL<<55)  /* Action required */
  36
  37 /*
  38  * Note that the full MCACOD field of IA32_MCi_STATUS MSR is
  39  * bits 15:0.  But bit 12 is the 'F' bit, defined for corrected
  40  * errors to indicate that errors are being filtered by hardware.
  41  * We should mask out bit 12 when looking for specific signatures
  42  * of uncorrected errors - so the F bit is deliberately skipped
  43  * in this #define.
  44  */
  45 #define MCACOD            0xefff     /* MCA Error Code */
  46
  47 /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */
  48 #define MCACOD_SCRUB    0x00C0  /* 0xC0-0xCF Memory Scrubbing */
  49 #define MCACOD_SCRUBMSK 0xeff0  /* Skip bit 12 ('F' bit) */
  50 #define MCACOD_L3WB     0x017A  /* L3 Explicit Writeback */
  51 #define MCACOD_DATA     0x0134  /* Data Load */
  52 #define MCACOD_INSTR    0x0150  /* Instruction Fetch */
  53
  54 /* MCi_MISC register defines */
  55 #define MCI_MISC_ADDR_LSB(m)    ((m) & 0x3f)
  56 #define MCI_MISC_ADDR_MODE(m)   (((m) >> 6) & 7)
  57 #define  MCI_MISC_ADDR_SEGOFF   0       /* segment offset */
  58 #define  MCI_MISC_ADDR_LINEAR   1       /* linear address */
  59 #define  MCI_MISC_ADDR_PHYS     2       /* physical address */
  60 #define  MCI_MISC_ADDR_MEM      3       /* memory address */
  61 #define  MCI_MISC_ADDR_GENERIC  7       /* generic */
  62
  63 /* CTL2 register defines */
  64 #define MCI_CTL2_CMCI_EN                (1ULL << 30)
  65 #define MCI_CTL2_CMCI_THRESHOLD_MASK    0x7fffULL
  66
  67 #define MCJ_CTX_MASK            3
  68 #define MCJ_CTX(flags)          ((flags) & MCJ_CTX_MASK)
  69 #define MCJ_CTX_RANDOM          0    /* inject context: random */
  70 #define MCJ_CTX_PROCESS         0x1  /* inject context: process */
  71 #define MCJ_CTX_IRQ             0x2  /* inject context: IRQ */
  72 #define MCJ_NMI_BROADCAST       0x4  /* do NMI broadcasting */
  73 #define MCJ_EXCEPTION           0x8  /* raise as exception */
  74 #define MCJ_IRQ_BROADCAST       0x10 /* do IRQ broadcasting */
  75
  76 #define MCE_OVERFLOW 0          /* bit 0 in flags means overflow */
  77
  78 /* Software defined banks */
  79 #define MCE_EXTENDED_BANK       128
  80 #define MCE_THERMAL_BANK        (MCE_EXTENDED_BANK + 0)
  81 #define K8_MCE_THRESHOLD_BASE   (MCE_EXTENDED_BANK + 1)
  82
  83 #define MCE_LOG_LEN 32
  84 #define MCE_LOG_SIGNATURE       "MACHINECHECK"
  85
  86 /*
  87  * This structure contains all data related to the MCE log.  Also
  88  * carries a signature to make it easier to find from external
  89  * debugging tools.  Each entry is only valid when its finished flag
  90  * is set.
  91  */
  92 struct mce_log {
  93         char signature[12]; /* "MACHINECHECK" */
  94         unsigned len;       /* = MCE_LOG_LEN */
  95         unsigned next;
  96         unsigned flags;
  97         unsigned recordlen;     /* length of struct mce */
  98         struct mce entry[MCE_LOG_LEN];
  99 };
 100
 101 struct mca_config {
 102         bool dont_log_ce;
 103         bool cmci_disabled;
 104         bool ignore_ce;
 105         bool disabled;
 106         bool ser;
 107         bool bios_cmci_threshold;
 108         u8 banks;
 109         s8 bootlog;
 110         int tolerant;
 111         int monarch_timeout;
 112         int panic_timeout;
 113         u32 rip_msr;
 114 };
 115
 116 extern struct mca_config mca_cfg;
 117 extern void mce_register_decode_chain(struct notifier_block *nb);
 118 extern void mce_unregister_decode_chain(struct notifier_block *nb);
 119
 120 #include <linux/percpu.h>
 121 #include <linux/atomic.h>
 122
 123 extern int mce_p5_enabled;
 124
 125 #ifdef CONFIG_X86_MCE
 126 int mcheck_init(void);
 127 void mcheck_cpu_init(struct cpuinfo_x86 *c);
 128 #else
 129 static inline int mcheck_init(void) { return 0; }
 130 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {}
 131 #endif
 132
 133 #ifdef CONFIG_X86_ANCIENT_MCE
 134 void intel_p5_mcheck_init(struct cpuinfo_x86 *c);
 135 void winchip_mcheck_init(struct cpuinfo_x86 *c);
 136 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; }
 137 #else
 138 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {}
 139 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
 140 static inline void enable_p5_mce(void) {}
 141 #endif
 142
 143 void mce_setup(struct mce *m);
 144 void mce_log(struct mce *m);
 145 DECLARE_PER_CPU(struct device *, mce_device);
 146
 147 /*
 148  * Maximum banks number.
 149  * This is the limit of the current register layout on
 150  * Intel CPUs.
 151  */
 152 #define MAX_NR_BANKS 32
 153
 154 #ifdef CONFIG_X86_MCE_INTEL
 155 void mce_intel_feature_init(struct cpuinfo_x86 *c);
 156 void cmci_clear(void);
 157 void cmci_reenable(void);
 158 void cmci_rediscover(void);
 159 void cmci_recheck(void);
 160 #else
 161 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { }
 162 static inline void cmci_clear(void) {}
 163 static inline void cmci_reenable(void) {}
 164 static inline void cmci_rediscover(void) {}
 165 static inline void cmci_recheck(void) {}
 166 #endif
 167
 168 #ifdef CONFIG_X86_MCE_AMD
 169 void mce_amd_feature_init(struct cpuinfo_x86 *c);
 170 #else
 171 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
 172 #endif
 173
 174 int mce_available(struct cpuinfo_x86 *c);
 175
 176 DECLARE_PER_CPU(unsigned, mce_exception_count);
 177 DECLARE_PER_CPU(unsigned, mce_poll_count);
 178
 179 extern atomic_t mce_entry;
 180
 181 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
 182 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
 183
 184 enum mcp_flags {
 185         MCP_TIMESTAMP = (1 << 0),       /* log time stamp */
 186         MCP_UC = (1 << 1),              /* log uncorrected errors */
 187         MCP_DONTLOG = (1 << 2),         /* only clear, don't log */
 188 };
 189 void machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
 190
 191 int mce_notify_irq(void);
 192 void mce_notify_process(void);
 193
 194 DECLARE_PER_CPU(struct mce, injectm);
 195
 196 extern void register_mce_write_callback(ssize_t (*)(struct file *filp,
 197                                     const char __user *ubuf,
 198                                     size_t usize, loff_t *off));
 199
 200 /* Disable CMCI/polling for MCA bank claimed by firmware */
 201 extern void mce_disable_bank(int bank);
 202
 203 /*
 204  * Exception handler
 205  */
 206
 207 /* Call the installed machine check handler for this CPU setup. */
 208 extern void (*machine_check_vector)(struct pt_regs *, long error_code);
 209 void do_machine_check(struct pt_regs *, long);
 210
 211 /*
 212  * Threshold handler
 213  */
 214
 215 extern void (*mce_threshold_vector)(void);
 216 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
 217
 218 /*
 219  * Thermal handler
 220  */
 221
 222 void intel_init_thermal(struct cpuinfo_x86 *c);
 223
 224 void mce_log_therm_throt_event(__u64 status);
 225
 226 /* Interrupt Handler for core thermal thresholds */
 227 extern int (*platform_thermal_notify)(__u64 msr_val);
 228
 229 /* Interrupt Handler for package thermal thresholds */
 230 extern int (*platform_thermal_package_notify)(__u64 msr_val);
 231
 232 /* Callback support of rate control, return true, if
 233  * callback has rate control */
 234 extern bool (*platform_thermal_package_rate_control)(void);
 235
 236 #ifdef CONFIG_X86_THERMAL_VECTOR
 237 extern void mcheck_intel_therm_init(void);
 238 #else
 239 static inline void mcheck_intel_therm_init(void) { }
 240 #endif
 241
 242 /*
 243  * Used by APEI to report memory error via /dev/mcelog
 244  */
 245
 246 struct cper_sec_mem_err;
 247 extern void apei_mce_report_mem_error(int corrected,
 248                                       struct cper_sec_mem_err *mem_err);
 249
 250 #endif /* _ASM_X86_MCE_H */