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 /* AMD-specific bits */
  38 #define MCI_STATUS_DEFERRED     (1ULL<<44)  /* declare an uncorrected error */
  39 #define MCI_STATUS_POISON       (1ULL<<43)  /* access poisonous data */
  40
  41 /*
  42  * Note that the full MCACOD field of IA32_MCi_STATUS MSR is
  43  * bits 15:0.  But bit 12 is the 'F' bit, defined for corrected
  44  * errors to indicate that errors are being filtered by hardware.
  45  * We should mask out bit 12 when looking for specific signatures
  46  * of uncorrected errors - so the F bit is deliberately skipped
  47  * in this #define.
  48  */
  49 #define MCACOD            0xefff     /* MCA Error Code */
  50
  51 /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */
  52 #define MCACOD_SCRUB    0x00C0  /* 0xC0-0xCF Memory Scrubbing */
  53 #define MCACOD_SCRUBMSK 0xeff0  /* Skip bit 12 ('F' bit) */
  54 #define MCACOD_L3WB     0x017A  /* L3 Explicit Writeback */
  55 #define MCACOD_DATA     0x0134  /* Data Load */
  56 #define MCACOD_INSTR    0x0150  /* Instruction Fetch */
  57
  58 /* MCi_MISC register defines */
  59 #define MCI_MISC_ADDR_LSB(m)    ((m) & 0x3f)
  60 #define MCI_MISC_ADDR_MODE(m)   (((m) >> 6) & 7)
  61 #define  MCI_MISC_ADDR_SEGOFF   0       /* segment offset */
  62 #define  MCI_MISC_ADDR_LINEAR   1       /* linear address */
  63 #define  MCI_MISC_ADDR_PHYS     2       /* physical address */
  64 #define  MCI_MISC_ADDR_MEM      3       /* memory address */
  65 #define  MCI_MISC_ADDR_GENERIC  7       /* generic */
  66
  67 /* CTL2 register defines */
  68 #define MCI_CTL2_CMCI_EN                (1ULL << 30)
  69 #define MCI_CTL2_CMCI_THRESHOLD_MASK    0x7fffULL
  70
  71 #define MCJ_CTX_MASK            3
  72 #define MCJ_CTX(flags)          ((flags) & MCJ_CTX_MASK)
  73 #define MCJ_CTX_RANDOM          0    /* inject context: random */
  74 #define MCJ_CTX_PROCESS         0x1  /* inject context: process */
  75 #define MCJ_CTX_IRQ             0x2  /* inject context: IRQ */
  76 #define MCJ_NMI_BROADCAST       0x4  /* do NMI broadcasting */
  77 #define MCJ_EXCEPTION           0x8  /* raise as exception */
  78 #define MCJ_IRQ_BROADCAST       0x10 /* do IRQ broadcasting */
  79
  80 #define MCE_OVERFLOW 0          /* bit 0 in flags means overflow */
  81
  82 /* Software defined banks */
  83 #define MCE_EXTENDED_BANK       128
  84 #define MCE_THERMAL_BANK        (MCE_EXTENDED_BANK + 0)
  85
  86 #define MCE_LOG_LEN 32
  87 #define MCE_LOG_SIGNATURE       "MACHINECHECK"
  88
  89 /*
  90  * This structure contains all data related to the MCE log.  Also
  91  * carries a signature to make it easier to find from external
  92  * debugging tools.  Each entry is only valid when its finished flag
  93  * is set.
  94  */
  95 struct mce_log {
  96         char signature[12]; /* "MACHINECHECK" */
  97         unsigned len;       /* = MCE_LOG_LEN */
  98         unsigned next;
  99         unsigned flags;
 100         unsigned recordlen;     /* length of struct mce */
 101         struct mce entry[MCE_LOG_LEN];
 102 };
 103
 104 struct mca_config {
 105         bool dont_log_ce;
 106         bool cmci_disabled;
 107         bool ignore_ce;
 108         bool disabled;
 109         bool ser;
 110         bool bios_cmci_threshold;
 111         u8 banks;
 112         s8 bootlog;
 113         int tolerant;
 114         int monarch_timeout;
 115         int panic_timeout;
 116         u32 rip_msr;
 117 };
 118
 119 struct mce_vendor_flags {
 120         __u64           overflow_recov  : 1, /* cpuid_ebx(80000007) */
 121                         __reserved_0    : 63;
 122 };
 123 extern struct mce_vendor_flags mce_flags;
 124
 125 extern struct mca_config mca_cfg;
 126 extern void mce_register_decode_chain(struct notifier_block *nb);
 127 extern void mce_unregister_decode_chain(struct notifier_block *nb);
 128
 129 #include <linux/percpu.h>
 130 #include <linux/atomic.h>
 131
 132 extern int mce_p5_enabled;
 133
 134 #ifdef CONFIG_X86_MCE
 135 int mcheck_init(void);
 136 void mcheck_cpu_init(struct cpuinfo_x86 *c);
 137 void mcheck_vendor_init_severity(void);
 138 #else
 139 static inline int mcheck_init(void) { return 0; }
 140 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {}
 141 static inline void mcheck_vendor_init_severity(void) {}
 142 #endif
 143
 144 #ifdef CONFIG_X86_ANCIENT_MCE
 145 void intel_p5_mcheck_init(struct cpuinfo_x86 *c);
 146 void winchip_mcheck_init(struct cpuinfo_x86 *c);
 147 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; }
 148 #else
 149 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {}
 150 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
 151 static inline void enable_p5_mce(void) {}
 152 #endif
 153
 154 void mce_setup(struct mce *m);
 155 void mce_log(struct mce *m);
 156 DECLARE_PER_CPU(struct device *, mce_device);
 157
 158 /*
 159  * Maximum banks number.
 160  * This is the limit of the current register layout on
 161  * Intel CPUs.
 162  */
 163 #define MAX_NR_BANKS 32
 164
 165 #ifdef CONFIG_X86_MCE_INTEL
 166 void mce_intel_feature_init(struct cpuinfo_x86 *c);
 167 void cmci_clear(void);
 168 void cmci_reenable(void);
 169 void cmci_rediscover(void);
 170 void cmci_recheck(void);
 171 #else
 172 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { }
 173 static inline void cmci_clear(void) {}
 174 static inline void cmci_reenable(void) {}
 175 static inline void cmci_rediscover(void) {}
 176 static inline void cmci_recheck(void) {}
 177 #endif
 178
 179 #ifdef CONFIG_X86_MCE_AMD
 180 void mce_amd_feature_init(struct cpuinfo_x86 *c);
 181 #else
 182 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
 183 #endif
 184
 185 int mce_available(struct cpuinfo_x86 *c);
 186
 187 DECLARE_PER_CPU(unsigned, mce_exception_count);
 188 DECLARE_PER_CPU(unsigned, mce_poll_count);
 189
 190 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
 191 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
 192
 193 enum mcp_flags {
 194         MCP_TIMESTAMP   = BIT(0),       /* log time stamp */
 195         MCP_UC          = BIT(1),       /* log uncorrected errors */
 196         MCP_DONTLOG     = BIT(2),       /* only clear, don't log */
 197 };
 198 bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
 199
 200 int mce_notify_irq(void);
 201
 202 DECLARE_PER_CPU(struct mce, injectm);
 203
 204 extern void register_mce_write_callback(ssize_t (*)(struct file *filp,
 205                                     const char __user *ubuf,
 206                                     size_t usize, loff_t *off));
 207
 208 /* Disable CMCI/polling for MCA bank claimed by firmware */
 209 extern void mce_disable_bank(int bank);
 210
 211 /*
 212  * Exception handler
 213  */
 214
 215 /* Call the installed machine check handler for this CPU setup. */
 216 extern void (*machine_check_vector)(struct pt_regs *, long error_code);
 217 void do_machine_check(struct pt_regs *, long);
 218
 219 /*
 220  * Threshold handler
 221  */
 222
 223 extern void (*mce_threshold_vector)(void);
 224 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
 225
 226 /*
 227  * Thermal handler
 228  */
 229
 230 void intel_init_thermal(struct cpuinfo_x86 *c);
 231
 232 void mce_log_therm_throt_event(__u64 status);
 233
 234 /* Interrupt Handler for core thermal thresholds */
 235 extern int (*platform_thermal_notify)(__u64 msr_val);
 236
 237 /* Interrupt Handler for package thermal thresholds */
 238 extern int (*platform_thermal_package_notify)(__u64 msr_val);
 239
 240 /* Callback support of rate control, return true, if
 241  * callback has rate control */
 242 extern bool (*platform_thermal_package_rate_control)(void);
 243
 244 #ifdef CONFIG_X86_THERMAL_VECTOR
 245 extern void mcheck_intel_therm_init(void);
 246 #else
 247 static inline void mcheck_intel_therm_init(void) { }
 248 #endif
 249
 250 /*
 251  * Used by APEI to report memory error via /dev/mcelog
 252  */
 253
 254 struct cper_sec_mem_err;
 255 extern void apei_mce_report_mem_error(int corrected,
 256                                       struct cper_sec_mem_err *mem_err);
 257
 258 #endif /* _ASM_X86_MCE_H */