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 #define MCG_LMCE_P              (1ULL<<27)   /* Local machine check supported */
  21
  22 /* MCG_STATUS register defines */
  23 #define MCG_STATUS_RIPV  (1ULL<<0)   /* restart ip valid */
  24 #define MCG_STATUS_EIPV  (1ULL<<1)   /* ip points to correct instruction */
  25 #define MCG_STATUS_MCIP  (1ULL<<2)   /* machine check in progress */
  26 #define MCG_STATUS_LMCES (1ULL<<3)   /* LMCE signaled */
  27
  28 /* MCG_EXT_CTL register defines */
  29 #define MCG_EXT_CTL_LMCE_EN (1ULL<<0) /* Enable LMCE */
  30
  31 /* MCi_STATUS register defines */
  32 #define MCI_STATUS_VAL   (1ULL<<63)  /* valid error */
  33 #define MCI_STATUS_OVER  (1ULL<<62)  /* previous errors lost */
  34 #define MCI_STATUS_UC    (1ULL<<61)  /* uncorrected error */
  35 #define MCI_STATUS_EN    (1ULL<<60)  /* error enabled */
  36 #define MCI_STATUS_MISCV (1ULL<<59)  /* misc error reg. valid */
  37 #define MCI_STATUS_ADDRV (1ULL<<58)  /* addr reg. valid */
  38 #define MCI_STATUS_PCC   (1ULL<<57)  /* processor context corrupt */
  39 #define MCI_STATUS_S     (1ULL<<56)  /* Signaled machine check */
  40 #define MCI_STATUS_AR    (1ULL<<55)  /* Action required */
  41
  42 /* AMD-specific bits */
  43 #define MCI_STATUS_DEFERRED     (1ULL<<44)  /* declare an uncorrected error */
  44 #define MCI_STATUS_POISON       (1ULL<<43)  /* access poisonous data */
  45
  46 /*
  47  * Note that the full MCACOD field of IA32_MCi_STATUS MSR is
  48  * bits 15:0.  But bit 12 is the 'F' bit, defined for corrected
  49  * errors to indicate that errors are being filtered by hardware.
  50  * We should mask out bit 12 when looking for specific signatures
  51  * of uncorrected errors - so the F bit is deliberately skipped
  52  * in this #define.
  53  */
  54 #define MCACOD            0xefff     /* MCA Error Code */
  55
  56 /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */
  57 #define MCACOD_SCRUB    0x00C0  /* 0xC0-0xCF Memory Scrubbing */
  58 #define MCACOD_SCRUBMSK 0xeff0  /* Skip bit 12 ('F' bit) */
  59 #define MCACOD_L3WB     0x017A  /* L3 Explicit Writeback */
  60 #define MCACOD_DATA     0x0134  /* Data Load */
  61 #define MCACOD_INSTR    0x0150  /* Instruction Fetch */
  62
  63 /* MCi_MISC register defines */
  64 #define MCI_MISC_ADDR_LSB(m)    ((m) & 0x3f)
  65 #define MCI_MISC_ADDR_MODE(m)   (((m) >> 6) & 7)
  66 #define  MCI_MISC_ADDR_SEGOFF   0       /* segment offset */
  67 #define  MCI_MISC_ADDR_LINEAR   1       /* linear address */
  68 #define  MCI_MISC_ADDR_PHYS     2       /* physical address */
  69 #define  MCI_MISC_ADDR_MEM      3       /* memory address */
  70 #define  MCI_MISC_ADDR_GENERIC  7       /* generic */
  71
  72 /* CTL2 register defines */
  73 #define MCI_CTL2_CMCI_EN                (1ULL << 30)
  74 #define MCI_CTL2_CMCI_THRESHOLD_MASK    0x7fffULL
  75
  76 #define MCJ_CTX_MASK            3
  77 #define MCJ_CTX(flags)          ((flags) & MCJ_CTX_MASK)
  78 #define MCJ_CTX_RANDOM          0    /* inject context: random */
  79 #define MCJ_CTX_PROCESS         0x1  /* inject context: process */
  80 #define MCJ_CTX_IRQ             0x2  /* inject context: IRQ */
  81 #define MCJ_NMI_BROADCAST       0x4  /* do NMI broadcasting */
  82 #define MCJ_EXCEPTION           0x8  /* raise as exception */
  83 #define MCJ_IRQ_BROADCAST       0x10 /* do IRQ broadcasting */
  84
  85 #define MCE_OVERFLOW 0          /* bit 0 in flags means overflow */
  86
  87 /* Software defined banks */
  88 #define MCE_EXTENDED_BANK       128
  89 #define MCE_THERMAL_BANK        (MCE_EXTENDED_BANK + 0)
  90
  91 #define MCE_LOG_LEN 32
  92 #define MCE_LOG_SIGNATURE       "MACHINECHECK"
  93
  94 /*
  95  * This structure contains all data related to the MCE log.  Also
  96  * carries a signature to make it easier to find from external
  97  * debugging tools.  Each entry is only valid when its finished flag
  98  * is set.
  99  */
 100 struct mce_log {
 101         char signature[12]; /* "MACHINECHECK" */
 102         unsigned len;       /* = MCE_LOG_LEN */
 103         unsigned next;
 104         unsigned flags;
 105         unsigned recordlen;     /* length of struct mce */
 106         struct mce entry[MCE_LOG_LEN];
 107 };
 108
 109 struct mca_config {
 110         bool dont_log_ce;
 111         bool cmci_disabled;
 112         bool lmce_disabled;
 113         bool ignore_ce;
 114         bool disabled;
 115         bool ser;
 116         bool bios_cmci_threshold;
 117         u8 banks;
 118         s8 bootlog;
 119         int tolerant;
 120         int monarch_timeout;
 121         int panic_timeout;
 122         u32 rip_msr;
 123 };
 124
 125 struct mce_vendor_flags {
 126         /*
 127          * Indicates that overflow conditions are not fatal, when set.
 128          */
 129         __u64 overflow_recov    : 1,
 130
 131         /*
 132          * (AMD) SUCCOR stands for S/W UnCorrectable error COntainment and
 133          * Recovery. It indicates support for data poisoning in HW and deferred
 134          * error interrupts.
 135          */
 136               succor            : 1,
 137
 138         /*
 139          * (AMD) SMCA: This bit indicates support for Scalable MCA which expands
 140          * the register space for each MCA bank and also increases number of
 141          * banks. Also, to accommodate the new banks and registers, the MCA
 142          * register space is moved to a new MSR range.
 143          */
 144               smca              : 1,
 145
 146               __reserved_0      : 61;
 147 };
 148 extern struct mce_vendor_flags mce_flags;
 149
 150 extern struct mca_config mca_cfg;
 151 extern void mce_register_decode_chain(struct notifier_block *nb);
 152 extern void mce_unregister_decode_chain(struct notifier_block *nb);
 153
 154 #include <linux/percpu.h>
 155 #include <linux/atomic.h>
 156
 157 extern int mce_p5_enabled;
 158
 159 #ifdef CONFIG_X86_MCE
 160 int mcheck_init(void);
 161 void mcheck_cpu_init(struct cpuinfo_x86 *c);
 162 void mcheck_cpu_clear(struct cpuinfo_x86 *c);
 163 void mcheck_vendor_init_severity(void);
 164 #else
 165 static inline int mcheck_init(void) { return 0; }
 166 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {}
 167 static inline void mcheck_cpu_clear(struct cpuinfo_x86 *c) {}
 168 static inline void mcheck_vendor_init_severity(void) {}
 169 #endif
 170
 171 #ifdef CONFIG_X86_ANCIENT_MCE
 172 void intel_p5_mcheck_init(struct cpuinfo_x86 *c);
 173 void winchip_mcheck_init(struct cpuinfo_x86 *c);
 174 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; }
 175 #else
 176 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {}
 177 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
 178 static inline void enable_p5_mce(void) {}
 179 #endif
 180
 181 void mce_setup(struct mce *m);
 182 void mce_log(struct mce *m);
 183 DECLARE_PER_CPU(struct device *, mce_device);
 184
 185 /*
 186  * Maximum banks number.
 187  * This is the limit of the current register layout on
 188  * Intel CPUs.
 189  */
 190 #define MAX_NR_BANKS 32
 191
 192 #ifdef CONFIG_X86_MCE_INTEL
 193 void mce_intel_feature_init(struct cpuinfo_x86 *c);
 194 void mce_intel_feature_clear(struct cpuinfo_x86 *c);
 195 void cmci_clear(void);
 196 void cmci_reenable(void);
 197 void cmci_rediscover(void);
 198 void cmci_recheck(void);
 199 #else
 200 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { }
 201 static inline void mce_intel_feature_clear(struct cpuinfo_x86 *c) { }
 202 static inline void cmci_clear(void) {}
 203 static inline void cmci_reenable(void) {}
 204 static inline void cmci_rediscover(void) {}
 205 static inline void cmci_recheck(void) {}
 206 #endif
 207
 208 #ifdef CONFIG_X86_MCE_AMD
 209 void mce_amd_feature_init(struct cpuinfo_x86 *c);
 210 #else
 211 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
 212 #endif
 213
 214 int mce_available(struct cpuinfo_x86 *c);
 215
 216 DECLARE_PER_CPU(unsigned, mce_exception_count);
 217 DECLARE_PER_CPU(unsigned, mce_poll_count);
 218
 219 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
 220 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
 221
 222 enum mcp_flags {
 223         MCP_TIMESTAMP   = BIT(0),       /* log time stamp */
 224         MCP_UC          = BIT(1),       /* log uncorrected errors */
 225         MCP_DONTLOG     = BIT(2),       /* only clear, don't log */
 226 };
 227 bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
 228
 229 int mce_notify_irq(void);
 230
 231 DECLARE_PER_CPU(struct mce, injectm);
 232
 233 extern void register_mce_write_callback(ssize_t (*)(struct file *filp,
 234                                     const char __user *ubuf,
 235                                     size_t usize, loff_t *off));
 236
 237 /* Disable CMCI/polling for MCA bank claimed by firmware */
 238 extern void mce_disable_bank(int bank);
 239
 240 /*
 241  * Exception handler
 242  */
 243
 244 /* Call the installed machine check handler for this CPU setup. */
 245 extern void (*machine_check_vector)(struct pt_regs *, long error_code);
 246 void do_machine_check(struct pt_regs *, long);
 247
 248 /*
 249  * Threshold handler
 250  */
 251
 252 extern void (*mce_threshold_vector)(void);
 253 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
 254
 255 /* Deferred error interrupt handler */
 256 extern void (*deferred_error_int_vector)(void);
 257
 258 /*
 259  * Thermal handler
 260  */
 261
 262 void intel_init_thermal(struct cpuinfo_x86 *c);
 263
 264 void mce_log_therm_throt_event(__u64 status);
 265
 266 /* Interrupt Handler for core thermal thresholds */
 267 extern int (*platform_thermal_notify)(__u64 msr_val);
 268
 269 /* Interrupt Handler for package thermal thresholds */
 270 extern int (*platform_thermal_package_notify)(__u64 msr_val);
 271
 272 /* Callback support of rate control, return true, if
 273  * callback has rate control */
 274 extern bool (*platform_thermal_package_rate_control)(void);
 275
 276 #ifdef CONFIG_X86_THERMAL_VECTOR
 277 extern void mcheck_intel_therm_init(void);
 278 #else
 279 static inline void mcheck_intel_therm_init(void) { }
 280 #endif
 281
 282 /*
 283  * Used by APEI to report memory error via /dev/mcelog
 284  */
 285
 286 struct cper_sec_mem_err;
 287 extern void apei_mce_report_mem_error(int corrected,
 288                                       struct cper_sec_mem_err *mem_err);
 289
 290 #endif /* _ASM_X86_MCE_H */