1 #ifndef _ASM_X86_MCE_H 2 #define _ASM_X86_MCE_H 3 4 #include <linux/types.h> 5 #include <asm/ioctls.h> 6 7 /* 8 * Machine Check support for x86 9 */ 10 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 #define MCG_STATUS_RIPV (1ULL<<0) /* restart ip valid */ 21 #define MCG_STATUS_EIPV (1ULL<<1) /* ip points to correct instruction */ 22 #define MCG_STATUS_MCIP (1ULL<<2) /* machine check in progress */ 23 24 #define MCI_STATUS_VAL (1ULL<<63) /* valid error */ 25 #define MCI_STATUS_OVER (1ULL<<62) /* previous errors lost */ 26 #define MCI_STATUS_UC (1ULL<<61) /* uncorrected error */ 27 #define MCI_STATUS_EN (1ULL<<60) /* error enabled */ 28 #define MCI_STATUS_MISCV (1ULL<<59) /* misc error reg. valid */ 29 #define MCI_STATUS_ADDRV (1ULL<<58) /* addr reg. valid */ 30 #define MCI_STATUS_PCC (1ULL<<57) /* processor context corrupt */ 31 #define MCI_STATUS_S (1ULL<<56) /* Signaled machine check */ 32 #define MCI_STATUS_AR (1ULL<<55) /* Action required */ 33 34 /* MISC register defines */ 35 #define MCM_ADDR_SEGOFF 0 /* segment offset */ 36 #define MCM_ADDR_LINEAR 1 /* linear address */ 37 #define MCM_ADDR_PHYS 2 /* physical address */ 38 #define MCM_ADDR_MEM 3 /* memory address */ 39 #define MCM_ADDR_GENERIC 7 /* generic */ 40 41 /* CTL2 register defines */ 42 #define MCI_CTL2_CMCI_EN (1ULL << 30) 43 #define MCI_CTL2_CMCI_THRESHOLD_MASK 0x7fffULL 44 45 #define MCJ_CTX_MASK 3 46 #define MCJ_CTX(flags) ((flags) & MCJ_CTX_MASK) 47 #define MCJ_CTX_RANDOM 0 /* inject context: random */ 48 #define MCJ_CTX_PROCESS 1 /* inject context: process */ 49 #define MCJ_CTX_IRQ 2 /* inject context: IRQ */ 50 #define MCJ_NMI_BROADCAST 4 /* do NMI broadcasting */ 51 #define MCJ_EXCEPTION 8 /* raise as exception */ 52 53 /* Fields are zero when not available */ 54 struct mce { 55 __u64 status; 56 __u64 misc; 57 __u64 addr; 58 __u64 mcgstatus; 59 __u64 ip; 60 __u64 tsc; /* cpu time stamp counter */ 61 __u64 time; /* wall time_t when error was detected */ 62 __u8 cpuvendor; /* cpu vendor as encoded in system.h */ 63 __u8 inject_flags; /* software inject flags */ 64 __u16 pad; 65 __u32 cpuid; /* CPUID 1 EAX */ 66 __u8 cs; /* code segment */ 67 __u8 bank; /* machine check bank */ 68 __u8 cpu; /* cpu number; obsolete; use extcpu now */ 69 __u8 finished; /* entry is valid */ 70 __u32 extcpu; /* linux cpu number that detected the error */ 71 __u32 socketid; /* CPU socket ID */ 72 __u32 apicid; /* CPU initial apic ID */ 73 __u64 mcgcap; /* MCGCAP MSR: machine check capabilities of CPU */ 74 }; 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 83 #define MCE_LOG_LEN 32 84 85 struct mce_log { 86 char signature[12]; /* "MACHINECHECK" */ 87 unsigned len; /* = MCE_LOG_LEN */ 88 unsigned next; 89 unsigned flags; 90 unsigned recordlen; /* length of struct mce */ 91 struct mce entry[MCE_LOG_LEN]; 92 }; 93 94 #define MCE_OVERFLOW 0 /* bit 0 in flags means overflow */ 95 96 #define MCE_LOG_SIGNATURE "MACHINECHECK" 97 98 #define MCE_GET_RECORD_LEN _IOR('M', 1, int) 99 #define MCE_GET_LOG_LEN _IOR('M', 2, int) 100 #define MCE_GETCLEAR_FLAGS _IOR('M', 3, int) 101 102 /* Software defined banks */ 103 #define MCE_EXTENDED_BANK 128 104 #define MCE_THERMAL_BANK MCE_EXTENDED_BANK + 0 105 106 #define K8_MCE_THRESHOLD_BASE (MCE_EXTENDED_BANK + 1) /* MCE_AMD */ 107 #define K8_MCE_THRESHOLD_BANK_0 (MCE_THRESHOLD_BASE + 0 * 9) 108 #define K8_MCE_THRESHOLD_BANK_1 (MCE_THRESHOLD_BASE + 1 * 9) 109 #define K8_MCE_THRESHOLD_BANK_2 (MCE_THRESHOLD_BASE + 2 * 9) 110 #define K8_MCE_THRESHOLD_BANK_3 (MCE_THRESHOLD_BASE + 3 * 9) 111 #define K8_MCE_THRESHOLD_BANK_4 (MCE_THRESHOLD_BASE + 4 * 9) 112 #define K8_MCE_THRESHOLD_BANK_5 (MCE_THRESHOLD_BASE + 5 * 9) 113 #define K8_MCE_THRESHOLD_DRAM_ECC (MCE_THRESHOLD_BANK_4 + 0) 114 115 116 #ifdef __KERNEL__ 117 118 extern struct atomic_notifier_head x86_mce_decoder_chain; 119 120 #include <linux/percpu.h> 121 #include <linux/init.h> 122 #include <asm/atomic.h> 123 124 extern int mce_disabled; 125 extern int mce_p5_enabled; 126 127 #ifdef CONFIG_X86_MCE 128 int mcheck_init(void); 129 void mcheck_cpu_init(struct cpuinfo_x86 *c); 130 #else 131 static inline int mcheck_init(void) { return 0; } 132 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {} 133 #endif 134 135 #ifdef CONFIG_X86_ANCIENT_MCE 136 void intel_p5_mcheck_init(struct cpuinfo_x86 *c); 137 void winchip_mcheck_init(struct cpuinfo_x86 *c); 138 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; } 139 #else 140 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {} 141 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {} 142 static inline void enable_p5_mce(void) {} 143 #endif 144 145 void mce_setup(struct mce *m); 146 void mce_log(struct mce *m); 147 DECLARE_PER_CPU(struct sys_device, mce_dev); 148 149 /* 150 * Maximum banks number. 151 * This is the limit of the current register layout on 152 * Intel CPUs. 153 */ 154 #define MAX_NR_BANKS 32 155 156 #ifdef CONFIG_X86_MCE_INTEL 157 extern int mce_cmci_disabled; 158 extern int mce_ignore_ce; 159 void mce_intel_feature_init(struct cpuinfo_x86 *c); 160 void cmci_clear(void); 161 void cmci_reenable(void); 162 void cmci_rediscover(int dying); 163 void cmci_recheck(void); 164 #else 165 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { } 166 static inline void cmci_clear(void) {} 167 static inline void cmci_reenable(void) {} 168 static inline void cmci_rediscover(int dying) {} 169 static inline void cmci_recheck(void) {} 170 #endif 171 172 #ifdef CONFIG_X86_MCE_AMD 173 void mce_amd_feature_init(struct cpuinfo_x86 *c); 174 #else 175 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { } 176 #endif 177 178 int mce_available(struct cpuinfo_x86 *c); 179 180 DECLARE_PER_CPU(unsigned, mce_exception_count); 181 DECLARE_PER_CPU(unsigned, mce_poll_count); 182 183 extern atomic_t mce_entry; 184 185 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS); 186 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks); 187 188 enum mcp_flags { 189 MCP_TIMESTAMP = (1 << 0), /* log time stamp */ 190 MCP_UC = (1 << 1), /* log uncorrected errors */ 191 MCP_DONTLOG = (1 << 2), /* only clear, don't log */ 192 }; 193 void machine_check_poll(enum mcp_flags flags, mce_banks_t *b); 194 195 int mce_notify_irq(void); 196 void mce_notify_process(void); 197 198 DECLARE_PER_CPU(struct mce, injectm); 199 extern struct file_operations mce_chrdev_ops; 200 201 /* 202 * Exception handler 203 */ 204 205 /* Call the installed machine check handler for this CPU setup. */ 206 extern void (*machine_check_vector)(struct pt_regs *, long error_code); 207 void do_machine_check(struct pt_regs *, long); 208 209 /* 210 * Threshold handler 211 */ 212 213 extern void (*mce_threshold_vector)(void); 214 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu); 215 216 /* 217 * Thermal handler 218 */ 219 220 void intel_init_thermal(struct cpuinfo_x86 *c); 221 222 void mce_log_therm_throt_event(__u64 status); 223 224 /* Interrupt Handler for core thermal thresholds */ 225 extern int (*platform_thermal_notify)(__u64 msr_val); 226 227 #ifdef CONFIG_X86_THERMAL_VECTOR 228 extern void mcheck_intel_therm_init(void); 229 #else 230 static inline void mcheck_intel_therm_init(void) { } 231 #endif 232 233 /* 234 * Used by APEI to report memory error via /dev/mcelog 235 */ 236 237 struct cper_sec_mem_err; 238 extern void apei_mce_report_mem_error(int corrected, 239 struct cper_sec_mem_err *mem_err); 240 241 #endif /* __KERNEL__ */ 242 #endif /* _ASM_X86_MCE_H */ 243