1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_MCE_H 3 #define _ASM_X86_MCE_H 4 5 #include <uapi/asm/mce.h> 6 7 /* 8 * Machine Check support for x86 9 */ 10 11 /* MCG_CAP register defines */ 12 #define MCG_BANKCNT_MASK 0xff /* Number of Banks */ 13 #define MCG_CTL_P (1ULL<<8) /* MCG_CTL register available */ 14 #define MCG_EXT_P (1ULL<<9) /* Extended registers available */ 15 #define MCG_CMCI_P (1ULL<<10) /* CMCI supported */ 16 #define MCG_EXT_CNT_MASK 0xff0000 /* Number of Extended registers */ 17 #define MCG_EXT_CNT_SHIFT 16 18 #define MCG_EXT_CNT(c) (((c) & MCG_EXT_CNT_MASK) >> MCG_EXT_CNT_SHIFT) 19 #define MCG_SER_P (1ULL<<24) /* MCA recovery/new status bits */ 20 #define MCG_ELOG_P (1ULL<<26) /* Extended error log supported */ 21 #define MCG_LMCE_P (1ULL<<27) /* Local machine check supported */ 22 23 /* MCG_STATUS register defines */ 24 #define MCG_STATUS_RIPV (1ULL<<0) /* restart ip valid */ 25 #define MCG_STATUS_EIPV (1ULL<<1) /* ip points to correct instruction */ 26 #define MCG_STATUS_MCIP (1ULL<<2) /* machine check in progress */ 27 #define MCG_STATUS_LMCES (1ULL<<3) /* LMCE signaled */ 28 29 /* MCG_EXT_CTL register defines */ 30 #define MCG_EXT_CTL_LMCE_EN (1ULL<<0) /* Enable LMCE */ 31 32 /* MCi_STATUS register defines */ 33 #define MCI_STATUS_VAL (1ULL<<63) /* valid error */ 34 #define MCI_STATUS_OVER (1ULL<<62) /* previous errors lost */ 35 #define MCI_STATUS_UC (1ULL<<61) /* uncorrected error */ 36 #define MCI_STATUS_EN (1ULL<<60) /* error enabled */ 37 #define MCI_STATUS_MISCV (1ULL<<59) /* misc error reg. valid */ 38 #define MCI_STATUS_ADDRV (1ULL<<58) /* addr reg. valid */ 39 #define MCI_STATUS_PCC (1ULL<<57) /* processor context corrupt */ 40 #define MCI_STATUS_S (1ULL<<56) /* Signaled machine check */ 41 #define MCI_STATUS_AR (1ULL<<55) /* Action required */ 42 43 /* AMD-specific bits */ 44 #define MCI_STATUS_TCC (1ULL<<55) /* Task context corrupt */ 45 #define MCI_STATUS_SYNDV (1ULL<<53) /* synd reg. valid */ 46 #define MCI_STATUS_DEFERRED (1ULL<<44) /* uncorrected error, deferred exception */ 47 #define MCI_STATUS_POISON (1ULL<<43) /* access poisonous data */ 48 49 /* 50 * McaX field if set indicates a given bank supports MCA extensions: 51 * - Deferred error interrupt type is specifiable by bank. 52 * - MCx_MISC0[BlkPtr] field indicates presence of extended MISC registers, 53 * But should not be used to determine MSR numbers. 54 * - TCC bit is present in MCx_STATUS. 55 */ 56 #define MCI_CONFIG_MCAX 0x1 57 #define MCI_IPID_MCATYPE 0xFFFF0000 58 #define MCI_IPID_HWID 0xFFF 59 60 /* 61 * Note that the full MCACOD field of IA32_MCi_STATUS MSR is 62 * bits 15:0. But bit 12 is the 'F' bit, defined for corrected 63 * errors to indicate that errors are being filtered by hardware. 64 * We should mask out bit 12 when looking for specific signatures 65 * of uncorrected errors - so the F bit is deliberately skipped 66 * in this #define. 67 */ 68 #define MCACOD 0xefff /* MCA Error Code */ 69 70 /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */ 71 #define MCACOD_SCRUB 0x00C0 /* 0xC0-0xCF Memory Scrubbing */ 72 #define MCACOD_SCRUBMSK 0xeff0 /* Skip bit 12 ('F' bit) */ 73 #define MCACOD_L3WB 0x017A /* L3 Explicit Writeback */ 74 #define MCACOD_DATA 0x0134 /* Data Load */ 75 #define MCACOD_INSTR 0x0150 /* Instruction Fetch */ 76 77 /* MCi_MISC register defines */ 78 #define MCI_MISC_ADDR_LSB(m) ((m) & 0x3f) 79 #define MCI_MISC_ADDR_MODE(m) (((m) >> 6) & 7) 80 #define MCI_MISC_ADDR_SEGOFF 0 /* segment offset */ 81 #define MCI_MISC_ADDR_LINEAR 1 /* linear address */ 82 #define MCI_MISC_ADDR_PHYS 2 /* physical address */ 83 #define MCI_MISC_ADDR_MEM 3 /* memory address */ 84 #define MCI_MISC_ADDR_GENERIC 7 /* generic */ 85 86 /* CTL2 register defines */ 87 #define MCI_CTL2_CMCI_EN (1ULL << 30) 88 #define MCI_CTL2_CMCI_THRESHOLD_MASK 0x7fffULL 89 90 #define MCJ_CTX_MASK 3 91 #define MCJ_CTX(flags) ((flags) & MCJ_CTX_MASK) 92 #define MCJ_CTX_RANDOM 0 /* inject context: random */ 93 #define MCJ_CTX_PROCESS 0x1 /* inject context: process */ 94 #define MCJ_CTX_IRQ 0x2 /* inject context: IRQ */ 95 #define MCJ_NMI_BROADCAST 0x4 /* do NMI broadcasting */ 96 #define MCJ_EXCEPTION 0x8 /* raise as exception */ 97 #define MCJ_IRQ_BROADCAST 0x10 /* do IRQ broadcasting */ 98 99 #define MCE_OVERFLOW 0 /* bit 0 in flags means overflow */ 100 101 #define MCE_LOG_LEN 32 102 #define MCE_LOG_SIGNATURE "MACHINECHECK" 103 104 /* AMD Scalable MCA */ 105 #define MSR_AMD64_SMCA_MC0_CTL 0xc0002000 106 #define MSR_AMD64_SMCA_MC0_STATUS 0xc0002001 107 #define MSR_AMD64_SMCA_MC0_ADDR 0xc0002002 108 #define MSR_AMD64_SMCA_MC0_MISC0 0xc0002003 109 #define MSR_AMD64_SMCA_MC0_CONFIG 0xc0002004 110 #define MSR_AMD64_SMCA_MC0_IPID 0xc0002005 111 #define MSR_AMD64_SMCA_MC0_SYND 0xc0002006 112 #define MSR_AMD64_SMCA_MC0_DESTAT 0xc0002008 113 #define MSR_AMD64_SMCA_MC0_DEADDR 0xc0002009 114 #define MSR_AMD64_SMCA_MC0_MISC1 0xc000200a 115 #define MSR_AMD64_SMCA_MCx_CTL(x) (MSR_AMD64_SMCA_MC0_CTL + 0x10*(x)) 116 #define MSR_AMD64_SMCA_MCx_STATUS(x) (MSR_AMD64_SMCA_MC0_STATUS + 0x10*(x)) 117 #define MSR_AMD64_SMCA_MCx_ADDR(x) (MSR_AMD64_SMCA_MC0_ADDR + 0x10*(x)) 118 #define MSR_AMD64_SMCA_MCx_MISC(x) (MSR_AMD64_SMCA_MC0_MISC0 + 0x10*(x)) 119 #define MSR_AMD64_SMCA_MCx_CONFIG(x) (MSR_AMD64_SMCA_MC0_CONFIG + 0x10*(x)) 120 #define MSR_AMD64_SMCA_MCx_IPID(x) (MSR_AMD64_SMCA_MC0_IPID + 0x10*(x)) 121 #define MSR_AMD64_SMCA_MCx_SYND(x) (MSR_AMD64_SMCA_MC0_SYND + 0x10*(x)) 122 #define MSR_AMD64_SMCA_MCx_DESTAT(x) (MSR_AMD64_SMCA_MC0_DESTAT + 0x10*(x)) 123 #define MSR_AMD64_SMCA_MCx_DEADDR(x) (MSR_AMD64_SMCA_MC0_DEADDR + 0x10*(x)) 124 #define MSR_AMD64_SMCA_MCx_MISCy(x, y) ((MSR_AMD64_SMCA_MC0_MISC1 + y) + (0x10*(x))) 125 126 /* 127 * This structure contains all data related to the MCE log. Also 128 * carries a signature to make it easier to find from external 129 * debugging tools. Each entry is only valid when its finished flag 130 * is set. 131 */ 132 struct mce_log_buffer { 133 char signature[12]; /* "MACHINECHECK" */ 134 unsigned len; /* = MCE_LOG_LEN */ 135 unsigned next; 136 unsigned flags; 137 unsigned recordlen; /* length of struct mce */ 138 struct mce entry[MCE_LOG_LEN]; 139 }; 140 141 enum mce_notifier_prios { 142 MCE_PRIO_FIRST = INT_MAX, 143 MCE_PRIO_SRAO = INT_MAX - 1, 144 MCE_PRIO_EXTLOG = INT_MAX - 2, 145 MCE_PRIO_NFIT = INT_MAX - 3, 146 MCE_PRIO_EDAC = INT_MAX - 4, 147 MCE_PRIO_MCELOG = 1, 148 MCE_PRIO_LOWEST = 0, 149 }; 150 151 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 int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr); 211 #else 212 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { } 213 static inline int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr) { return -EINVAL; }; 214 #endif 215 216 int mce_available(struct cpuinfo_x86 *c); 217 bool mce_is_memory_error(struct mce *m); 218 219 DECLARE_PER_CPU(unsigned, mce_exception_count); 220 DECLARE_PER_CPU(unsigned, mce_poll_count); 221 222 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS); 223 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks); 224 225 enum mcp_flags { 226 MCP_TIMESTAMP = BIT(0), /* log time stamp */ 227 MCP_UC = BIT(1), /* log uncorrected errors */ 228 MCP_DONTLOG = BIT(2), /* only clear, don't log */ 229 }; 230 bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b); 231 232 int mce_notify_irq(void); 233 234 DECLARE_PER_CPU(struct mce, injectm); 235 236 /* Disable CMCI/polling for MCA bank claimed by firmware */ 237 extern void mce_disable_bank(int bank); 238 239 /* 240 * Exception handler 241 */ 242 243 /* Call the installed machine check handler for this CPU setup. */ 244 extern void (*machine_check_vector)(struct pt_regs *, long error_code); 245 void do_machine_check(struct pt_regs *, long); 246 247 /* 248 * Threshold handler 249 */ 250 extern void (*mce_threshold_vector)(void); 251 252 /* Deferred error interrupt handler */ 253 extern void (*deferred_error_int_vector)(void); 254 255 /* 256 * Thermal handler 257 */ 258 259 void intel_init_thermal(struct cpuinfo_x86 *c); 260 261 /* Interrupt Handler for core thermal thresholds */ 262 extern int (*platform_thermal_notify)(__u64 msr_val); 263 264 /* Interrupt Handler for package thermal thresholds */ 265 extern int (*platform_thermal_package_notify)(__u64 msr_val); 266 267 /* Callback support of rate control, return true, if 268 * callback has rate control */ 269 extern bool (*platform_thermal_package_rate_control)(void); 270 271 #ifdef CONFIG_X86_THERMAL_VECTOR 272 extern void mcheck_intel_therm_init(void); 273 #else 274 static inline void mcheck_intel_therm_init(void) { } 275 #endif 276 277 /* 278 * Used by APEI to report memory error via /dev/mcelog 279 */ 280 281 struct cper_sec_mem_err; 282 extern void apei_mce_report_mem_error(int corrected, 283 struct cper_sec_mem_err *mem_err); 284 285 /* 286 * Enumerate new IP types and HWID values in AMD processors which support 287 * Scalable MCA. 288 */ 289 #ifdef CONFIG_X86_MCE_AMD 290 291 /* These may be used by multiple smca_hwid_mcatypes */ 292 enum smca_bank_types { 293 SMCA_LS = 0, /* Load Store */ 294 SMCA_IF, /* Instruction Fetch */ 295 SMCA_L2_CACHE, /* L2 Cache */ 296 SMCA_DE, /* Decoder Unit */ 297 SMCA_RESERVED, /* Reserved */ 298 SMCA_EX, /* Execution Unit */ 299 SMCA_FP, /* Floating Point */ 300 SMCA_L3_CACHE, /* L3 Cache */ 301 SMCA_CS, /* Coherent Slave */ 302 SMCA_PIE, /* Power, Interrupts, etc. */ 303 SMCA_UMC, /* Unified Memory Controller */ 304 SMCA_PB, /* Parameter Block */ 305 SMCA_PSP, /* Platform Security Processor */ 306 SMCA_SMU, /* System Management Unit */ 307 N_SMCA_BANK_TYPES 308 }; 309 310 #define HWID_MCATYPE(hwid, mcatype) (((hwid) << 16) | (mcatype)) 311 312 struct smca_hwid { 313 unsigned int bank_type; /* Use with smca_bank_types for easy indexing. */ 314 u32 hwid_mcatype; /* (hwid,mcatype) tuple */ 315 u32 xec_bitmap; /* Bitmap of valid ExtErrorCodes; current max is 21. */ 316 u8 count; /* Number of instances. */ 317 }; 318 319 struct smca_bank { 320 struct smca_hwid *hwid; 321 u32 id; /* Value of MCA_IPID[InstanceId]. */ 322 u8 sysfs_id; /* Value used for sysfs name. */ 323 }; 324 325 extern struct smca_bank smca_banks[MAX_NR_BANKS]; 326 327 extern const char *smca_get_long_name(enum smca_bank_types t); 328 extern bool amd_mce_is_memory_error(struct mce *m); 329 330 extern int mce_threshold_create_device(unsigned int cpu); 331 extern int mce_threshold_remove_device(unsigned int cpu); 332 333 #else 334 335 static inline int mce_threshold_create_device(unsigned int cpu) { return 0; }; 336 static inline int mce_threshold_remove_device(unsigned int cpu) { return 0; }; 337 static inline bool amd_mce_is_memory_error(struct mce *m) { return false; }; 338 339 #endif 340 341 #endif /* _ASM_X86_MCE_H */ 342