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/init.h> 122 #include <linux/atomic.h> 123 124 extern int mce_p5_enabled; 125 126 #ifdef CONFIG_X86_MCE 127 int mcheck_init(void); 128 void mcheck_cpu_init(struct cpuinfo_x86 *c); 129 #else 130 static inline int mcheck_init(void) { return 0; } 131 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {} 132 #endif 133 134 #ifdef CONFIG_X86_ANCIENT_MCE 135 void intel_p5_mcheck_init(struct cpuinfo_x86 *c); 136 void winchip_mcheck_init(struct cpuinfo_x86 *c); 137 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; } 138 #else 139 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {} 140 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {} 141 static inline void enable_p5_mce(void) {} 142 #endif 143 144 void mce_setup(struct mce *m); 145 void mce_log(struct mce *m); 146 DECLARE_PER_CPU(struct device *, mce_device); 147 148 /* 149 * Maximum banks number. 150 * This is the limit of the current register layout on 151 * Intel CPUs. 152 */ 153 #define MAX_NR_BANKS 32 154 155 #ifdef CONFIG_X86_MCE_INTEL 156 void mce_intel_feature_init(struct cpuinfo_x86 *c); 157 void cmci_clear(void); 158 void cmci_reenable(void); 159 void cmci_rediscover(void); 160 void cmci_recheck(void); 161 #else 162 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { } 163 static inline void cmci_clear(void) {} 164 static inline void cmci_reenable(void) {} 165 static inline void cmci_rediscover(void) {} 166 static inline void cmci_recheck(void) {} 167 #endif 168 169 #ifdef CONFIG_X86_MCE_AMD 170 void mce_amd_feature_init(struct cpuinfo_x86 *c); 171 #else 172 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { } 173 #endif 174 175 int mce_available(struct cpuinfo_x86 *c); 176 177 DECLARE_PER_CPU(unsigned, mce_exception_count); 178 DECLARE_PER_CPU(unsigned, mce_poll_count); 179 180 extern atomic_t mce_entry; 181 182 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS); 183 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks); 184 185 enum mcp_flags { 186 MCP_TIMESTAMP = (1 << 0), /* log time stamp */ 187 MCP_UC = (1 << 1), /* log uncorrected errors */ 188 MCP_DONTLOG = (1 << 2), /* only clear, don't log */ 189 }; 190 void machine_check_poll(enum mcp_flags flags, mce_banks_t *b); 191 192 int mce_notify_irq(void); 193 void mce_notify_process(void); 194 195 DECLARE_PER_CPU(struct mce, injectm); 196 197 extern void register_mce_write_callback(ssize_t (*)(struct file *filp, 198 const char __user *ubuf, 199 size_t usize, loff_t *off)); 200 201 /* Disable CMCI/polling for MCA bank claimed by firmware */ 202 extern void mce_disable_bank(int bank); 203 204 /* 205 * Exception handler 206 */ 207 208 /* Call the installed machine check handler for this CPU setup. */ 209 extern void (*machine_check_vector)(struct pt_regs *, long error_code); 210 void do_machine_check(struct pt_regs *, long); 211 212 /* 213 * Threshold handler 214 */ 215 216 extern void (*mce_threshold_vector)(void); 217 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu); 218 219 /* 220 * Thermal handler 221 */ 222 223 void intel_init_thermal(struct cpuinfo_x86 *c); 224 225 void mce_log_therm_throt_event(__u64 status); 226 227 /* Interrupt Handler for core thermal thresholds */ 228 extern int (*platform_thermal_notify)(__u64 msr_val); 229 230 /* Interrupt Handler for package thermal thresholds */ 231 extern int (*platform_thermal_package_notify)(__u64 msr_val); 232 233 /* Callback support of rate control, return true, if 234 * callback has rate control */ 235 extern bool (*platform_thermal_package_rate_control)(void); 236 237 #ifdef CONFIG_X86_THERMAL_VECTOR 238 extern void mcheck_intel_therm_init(void); 239 #else 240 static inline void mcheck_intel_therm_init(void) { } 241 #endif 242 243 /* 244 * Used by APEI to report memory error via /dev/mcelog 245 */ 246 247 struct cper_sec_mem_err; 248 extern void apei_mce_report_mem_error(int corrected, 249 struct cper_sec_mem_err *mem_err); 250 251 #endif /* _ASM_X86_MCE_H */ 252