4 #include <uapi/asm/mce.h>
7 * Machine Check support for x86
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 */
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 */
28 /* MCG_EXT_CTL register defines */
29 #define MCG_EXT_CTL_LMCE_EN (1ULL<<0) /* Enable LMCE */
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 */
42 /* AMD-specific bits */
43 #define MCI_STATUS_TCC (1ULL<<55) /* Task context corrupt */
44 #define MCI_STATUS_SYNDV (1ULL<<53) /* synd reg. valid */
45 #define MCI_STATUS_DEFERRED (1ULL<<44) /* uncorrected error, deferred exception */
46 #define MCI_STATUS_POISON (1ULL<<43) /* access poisonous data */
49 * McaX field if set indicates a given bank supports MCA extensions:
50 * - Deferred error interrupt type is specifiable by bank.
51 * - MCx_MISC0[BlkPtr] field indicates presence of extended MISC registers,
52 * But should not be used to determine MSR numbers.
53 * - TCC bit is present in MCx_STATUS.
55 #define MCI_CONFIG_MCAX 0x1
56 #define MCI_IPID_MCATYPE 0xFFFF0000
57 #define MCI_IPID_HWID 0xFFF
60 * Note that the full MCACOD field of IA32_MCi_STATUS MSR is
61 * bits 15:0. But bit 12 is the 'F' bit, defined for corrected
62 * errors to indicate that errors are being filtered by hardware.
63 * We should mask out bit 12 when looking for specific signatures
64 * of uncorrected errors - so the F bit is deliberately skipped
67 #define MCACOD 0xefff /* MCA Error Code */
69 /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */
70 #define MCACOD_SCRUB 0x00C0 /* 0xC0-0xCF Memory Scrubbing */
71 #define MCACOD_SCRUBMSK 0xeff0 /* Skip bit 12 ('F' bit) */
72 #define MCACOD_L3WB 0x017A /* L3 Explicit Writeback */
73 #define MCACOD_DATA 0x0134 /* Data Load */
74 #define MCACOD_INSTR 0x0150 /* Instruction Fetch */
76 /* MCi_MISC register defines */
77 #define MCI_MISC_ADDR_LSB(m) ((m) & 0x3f)
78 #define MCI_MISC_ADDR_MODE(m) (((m) >> 6) & 7)
79 #define MCI_MISC_ADDR_SEGOFF 0 /* segment offset */
80 #define MCI_MISC_ADDR_LINEAR 1 /* linear address */
81 #define MCI_MISC_ADDR_PHYS 2 /* physical address */
82 #define MCI_MISC_ADDR_MEM 3 /* memory address */
83 #define MCI_MISC_ADDR_GENERIC 7 /* generic */
85 /* CTL2 register defines */
86 #define MCI_CTL2_CMCI_EN (1ULL << 30)
87 #define MCI_CTL2_CMCI_THRESHOLD_MASK 0x7fffULL
89 #define MCJ_CTX_MASK 3
90 #define MCJ_CTX(flags) ((flags) & MCJ_CTX_MASK)
91 #define MCJ_CTX_RANDOM 0 /* inject context: random */
92 #define MCJ_CTX_PROCESS 0x1 /* inject context: process */
93 #define MCJ_CTX_IRQ 0x2 /* inject context: IRQ */
94 #define MCJ_NMI_BROADCAST 0x4 /* do NMI broadcasting */
95 #define MCJ_EXCEPTION 0x8 /* raise as exception */
96 #define MCJ_IRQ_BROADCAST 0x10 /* do IRQ broadcasting */
98 #define MCE_OVERFLOW 0 /* bit 0 in flags means overflow */
100 /* Software defined banks */
101 #define MCE_EXTENDED_BANK 128
102 #define MCE_THERMAL_BANK (MCE_EXTENDED_BANK + 0)
104 #define MCE_LOG_LEN 32
105 #define MCE_LOG_SIGNATURE "MACHINECHECK"
107 /* AMD Scalable MCA */
108 #define MSR_AMD64_SMCA_MC0_CTL 0xc0002000
109 #define MSR_AMD64_SMCA_MC0_STATUS 0xc0002001
110 #define MSR_AMD64_SMCA_MC0_ADDR 0xc0002002
111 #define MSR_AMD64_SMCA_MC0_MISC0 0xc0002003
112 #define MSR_AMD64_SMCA_MC0_CONFIG 0xc0002004
113 #define MSR_AMD64_SMCA_MC0_IPID 0xc0002005
114 #define MSR_AMD64_SMCA_MC0_SYND 0xc0002006
115 #define MSR_AMD64_SMCA_MC0_DESTAT 0xc0002008
116 #define MSR_AMD64_SMCA_MC0_DEADDR 0xc0002009
117 #define MSR_AMD64_SMCA_MC0_MISC1 0xc000200a
118 #define MSR_AMD64_SMCA_MCx_CTL(x) (MSR_AMD64_SMCA_MC0_CTL + 0x10*(x))
119 #define MSR_AMD64_SMCA_MCx_STATUS(x) (MSR_AMD64_SMCA_MC0_STATUS + 0x10*(x))
120 #define MSR_AMD64_SMCA_MCx_ADDR(x) (MSR_AMD64_SMCA_MC0_ADDR + 0x10*(x))
121 #define MSR_AMD64_SMCA_MCx_MISC(x) (MSR_AMD64_SMCA_MC0_MISC0 + 0x10*(x))
122 #define MSR_AMD64_SMCA_MCx_CONFIG(x) (MSR_AMD64_SMCA_MC0_CONFIG + 0x10*(x))
123 #define MSR_AMD64_SMCA_MCx_IPID(x) (MSR_AMD64_SMCA_MC0_IPID + 0x10*(x))
124 #define MSR_AMD64_SMCA_MCx_SYND(x) (MSR_AMD64_SMCA_MC0_SYND + 0x10*(x))
125 #define MSR_AMD64_SMCA_MCx_DESTAT(x) (MSR_AMD64_SMCA_MC0_DESTAT + 0x10*(x))
126 #define MSR_AMD64_SMCA_MCx_DEADDR(x) (MSR_AMD64_SMCA_MC0_DEADDR + 0x10*(x))
127 #define MSR_AMD64_SMCA_MCx_MISCy(x, y) ((MSR_AMD64_SMCA_MC0_MISC1 + y) + (0x10*(x)))
130 * This structure contains all data related to the MCE log. Also
131 * carries a signature to make it easier to find from external
132 * debugging tools. Each entry is only valid when its finished flag
136 char signature[12]; /* "MACHINECHECK" */
137 unsigned len; /* = MCE_LOG_LEN */
140 unsigned recordlen; /* length of struct mce */
141 struct mce entry[MCE_LOG_LEN];
152 bool bios_cmci_threshold;
161 struct mce_vendor_flags {
163 * Indicates that overflow conditions are not fatal, when set.
165 __u64 overflow_recov : 1,
168 * (AMD) SUCCOR stands for S/W UnCorrectable error COntainment and
169 * Recovery. It indicates support for data poisoning in HW and deferred
175 * (AMD) SMCA: This bit indicates support for Scalable MCA which expands
176 * the register space for each MCA bank and also increases number of
177 * banks. Also, to accommodate the new banks and registers, the MCA
178 * register space is moved to a new MSR range.
185 struct mca_msr_regs {
186 u32 (*ctl) (int bank);
187 u32 (*status) (int bank);
188 u32 (*addr) (int bank);
189 u32 (*misc) (int bank);
192 extern struct mce_vendor_flags mce_flags;
194 extern struct mca_config mca_cfg;
195 extern struct mca_msr_regs msr_ops;
196 extern void mce_register_decode_chain(struct notifier_block *nb);
197 extern void mce_unregister_decode_chain(struct notifier_block *nb);
199 #include <linux/percpu.h>
200 #include <linux/atomic.h>
202 extern int mce_p5_enabled;
204 #ifdef CONFIG_X86_MCE
205 int mcheck_init(void);
206 void mcheck_cpu_init(struct cpuinfo_x86 *c);
207 void mcheck_cpu_clear(struct cpuinfo_x86 *c);
208 void mcheck_vendor_init_severity(void);
210 static inline int mcheck_init(void) { return 0; }
211 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {}
212 static inline void mcheck_cpu_clear(struct cpuinfo_x86 *c) {}
213 static inline void mcheck_vendor_init_severity(void) {}
216 #ifdef CONFIG_X86_ANCIENT_MCE
217 void intel_p5_mcheck_init(struct cpuinfo_x86 *c);
218 void winchip_mcheck_init(struct cpuinfo_x86 *c);
219 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; }
221 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {}
222 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
223 static inline void enable_p5_mce(void) {}
226 void mce_setup(struct mce *m);
227 void mce_log(struct mce *m);
228 DECLARE_PER_CPU(struct device *, mce_device);
231 * Maximum banks number.
232 * This is the limit of the current register layout on
235 #define MAX_NR_BANKS 32
237 #ifdef CONFIG_X86_MCE_INTEL
238 void mce_intel_feature_init(struct cpuinfo_x86 *c);
239 void mce_intel_feature_clear(struct cpuinfo_x86 *c);
240 void cmci_clear(void);
241 void cmci_reenable(void);
242 void cmci_rediscover(void);
243 void cmci_recheck(void);
245 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { }
246 static inline void mce_intel_feature_clear(struct cpuinfo_x86 *c) { }
247 static inline void cmci_clear(void) {}
248 static inline void cmci_reenable(void) {}
249 static inline void cmci_rediscover(void) {}
250 static inline void cmci_recheck(void) {}
253 #ifdef CONFIG_X86_MCE_AMD
254 void mce_amd_feature_init(struct cpuinfo_x86 *c);
256 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
259 int mce_available(struct cpuinfo_x86 *c);
261 DECLARE_PER_CPU(unsigned, mce_exception_count);
262 DECLARE_PER_CPU(unsigned, mce_poll_count);
264 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
265 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
268 MCP_TIMESTAMP = BIT(0), /* log time stamp */
269 MCP_UC = BIT(1), /* log uncorrected errors */
270 MCP_DONTLOG = BIT(2), /* only clear, don't log */
272 bool machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
274 int mce_notify_irq(void);
276 DECLARE_PER_CPU(struct mce, injectm);
278 extern void register_mce_write_callback(ssize_t (*)(struct file *filp,
279 const char __user *ubuf,
280 size_t usize, loff_t *off));
282 /* Disable CMCI/polling for MCA bank claimed by firmware */
283 extern void mce_disable_bank(int bank);
289 /* Call the installed machine check handler for this CPU setup. */
290 extern void (*machine_check_vector)(struct pt_regs *, long error_code);
291 void do_machine_check(struct pt_regs *, long);
297 extern void (*mce_threshold_vector)(void);
298 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
300 /* Deferred error interrupt handler */
301 extern void (*deferred_error_int_vector)(void);
307 void intel_init_thermal(struct cpuinfo_x86 *c);
309 void mce_log_therm_throt_event(__u64 status);
311 /* Interrupt Handler for core thermal thresholds */
312 extern int (*platform_thermal_notify)(__u64 msr_val);
314 /* Interrupt Handler for package thermal thresholds */
315 extern int (*platform_thermal_package_notify)(__u64 msr_val);
317 /* Callback support of rate control, return true, if
318 * callback has rate control */
319 extern bool (*platform_thermal_package_rate_control)(void);
321 #ifdef CONFIG_X86_THERMAL_VECTOR
322 extern void mcheck_intel_therm_init(void);
324 static inline void mcheck_intel_therm_init(void) { }
328 * Used by APEI to report memory error via /dev/mcelog
331 struct cper_sec_mem_err;
332 extern void apei_mce_report_mem_error(int corrected,
333 struct cper_sec_mem_err *mem_err);
336 * Enumerate new IP types and HWID values in AMD processors which support
339 #ifdef CONFIG_X86_MCE_AMD
341 /* These may be used by multiple smca_hwid_mcatypes */
342 enum smca_bank_types {
343 SMCA_LS = 0, /* Load Store */
344 SMCA_IF, /* Instruction Fetch */
345 SMCA_L2_CACHE, /* L2 Cache */
346 SMCA_DE, /* Decoder Unit */
347 SMCA_EX, /* Execution Unit */
348 SMCA_FP, /* Floating Point */
349 SMCA_L3_CACHE, /* L3 Cache */
350 SMCA_CS, /* Coherent Slave */
351 SMCA_PIE, /* Power, Interrupts, etc. */
352 SMCA_UMC, /* Unified Memory Controller */
353 SMCA_PB, /* Parameter Block */
354 SMCA_PSP, /* Platform Security Processor */
355 SMCA_SMU, /* System Management Unit */
359 struct smca_bank_name {
360 const char *name; /* Short name for sysfs */
361 const char *long_name; /* Long name for pretty-printing */
364 extern struct smca_bank_name smca_bank_names[N_SMCA_BANK_TYPES];
366 #define HWID_MCATYPE(hwid, mcatype) ((hwid << 16) | mcatype)
368 struct smca_hwid_mcatype {
369 unsigned int bank_type; /* Use with smca_bank_types for easy indexing. */
370 u32 hwid_mcatype; /* (hwid,mcatype) tuple */
371 u32 xec_bitmap; /* Bitmap of valid ExtErrorCodes; current max is 21. */
374 struct smca_bank_info {
375 struct smca_hwid_mcatype *type;
379 extern struct smca_bank_info smca_banks[MAX_NR_BANKS];
383 #endif /* _ASM_X86_MCE_H */