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 */
20 /* MCG_STATUS register defines */
21 #define MCG_STATUS_RIPV (1ULL<<0) /* restart ip valid */
22 #define MCG_STATUS_EIPV (1ULL<<1) /* ip points to correct instruction */
23 #define MCG_STATUS_MCIP (1ULL<<2) /* machine check in progress */
25 /* MCi_STATUS register defines */
26 #define MCI_STATUS_VAL (1ULL<<63) /* valid error */
27 #define MCI_STATUS_OVER (1ULL<<62) /* previous errors lost */
28 #define MCI_STATUS_UC (1ULL<<61) /* uncorrected error */
29 #define MCI_STATUS_EN (1ULL<<60) /* error enabled */
30 #define MCI_STATUS_MISCV (1ULL<<59) /* misc error reg. valid */
31 #define MCI_STATUS_ADDRV (1ULL<<58) /* addr reg. valid */
32 #define MCI_STATUS_PCC (1ULL<<57) /* processor context corrupt */
33 #define MCI_STATUS_S (1ULL<<56) /* Signaled machine check */
34 #define MCI_STATUS_AR (1ULL<<55) /* Action required */
35 #define MCACOD 0xffff /* MCA Error Code */
37 /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */
38 #define MCACOD_SCRUB 0x00C0 /* 0xC0-0xCF Memory Scrubbing */
39 #define MCACOD_SCRUBMSK 0xfff0
40 #define MCACOD_L3WB 0x017A /* L3 Explicit Writeback */
41 #define MCACOD_DATA 0x0134 /* Data Load */
42 #define MCACOD_INSTR 0x0150 /* Instruction Fetch */
44 /* MCi_MISC register defines */
45 #define MCI_MISC_ADDR_LSB(m) ((m) & 0x3f)
46 #define MCI_MISC_ADDR_MODE(m) (((m) >> 6) & 7)
47 #define MCI_MISC_ADDR_SEGOFF 0 /* segment offset */
48 #define MCI_MISC_ADDR_LINEAR 1 /* linear address */
49 #define MCI_MISC_ADDR_PHYS 2 /* physical address */
50 #define MCI_MISC_ADDR_MEM 3 /* memory address */
51 #define MCI_MISC_ADDR_GENERIC 7 /* generic */
53 /* CTL2 register defines */
54 #define MCI_CTL2_CMCI_EN (1ULL << 30)
55 #define MCI_CTL2_CMCI_THRESHOLD_MASK 0x7fffULL
57 #define MCJ_CTX_MASK 3
58 #define MCJ_CTX(flags) ((flags) & MCJ_CTX_MASK)
59 #define MCJ_CTX_RANDOM 0 /* inject context: random */
60 #define MCJ_CTX_PROCESS 0x1 /* inject context: process */
61 #define MCJ_CTX_IRQ 0x2 /* inject context: IRQ */
62 #define MCJ_NMI_BROADCAST 0x4 /* do NMI broadcasting */
63 #define MCJ_EXCEPTION 0x8 /* raise as exception */
64 #define MCJ_IRQ_BROADCAST 0x10 /* do IRQ broadcasting */
66 #define MCE_OVERFLOW 0 /* bit 0 in flags means overflow */
68 /* Software defined banks */
69 #define MCE_EXTENDED_BANK 128
70 #define MCE_THERMAL_BANK (MCE_EXTENDED_BANK + 0)
71 #define K8_MCE_THRESHOLD_BASE (MCE_EXTENDED_BANK + 1)
73 #define MCE_LOG_LEN 32
74 #define MCE_LOG_SIGNATURE "MACHINECHECK"
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
83 char signature[12]; /* "MACHINECHECK" */
84 unsigned len; /* = MCE_LOG_LEN */
87 unsigned recordlen; /* length of struct mce */
88 struct mce entry[MCE_LOG_LEN];
97 bool bios_cmci_threshold;
106 extern struct mca_config mca_cfg;
107 extern void mce_register_decode_chain(struct notifier_block *nb);
108 extern void mce_unregister_decode_chain(struct notifier_block *nb);
110 #include <linux/percpu.h>
111 #include <linux/init.h>
112 #include <linux/atomic.h>
114 extern int mce_p5_enabled;
116 #ifdef CONFIG_X86_MCE
117 int mcheck_init(void);
118 void mcheck_cpu_init(struct cpuinfo_x86 *c);
120 static inline int mcheck_init(void) { return 0; }
121 static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {}
124 #ifdef CONFIG_X86_ANCIENT_MCE
125 void intel_p5_mcheck_init(struct cpuinfo_x86 *c);
126 void winchip_mcheck_init(struct cpuinfo_x86 *c);
127 static inline void enable_p5_mce(void) { mce_p5_enabled = 1; }
129 static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {}
130 static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
131 static inline void enable_p5_mce(void) {}
134 void mce_setup(struct mce *m);
135 void mce_log(struct mce *m);
136 DECLARE_PER_CPU(struct device *, mce_device);
139 * Maximum banks number.
140 * This is the limit of the current register layout on
143 #define MAX_NR_BANKS 32
145 #ifdef CONFIG_X86_MCE_INTEL
146 void mce_intel_feature_init(struct cpuinfo_x86 *c);
147 void cmci_clear(void);
148 void cmci_reenable(void);
149 void cmci_rediscover(void);
150 void cmci_recheck(void);
152 static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { }
153 static inline void cmci_clear(void) {}
154 static inline void cmci_reenable(void) {}
155 static inline void cmci_rediscover(void) {}
156 static inline void cmci_recheck(void) {}
159 #ifdef CONFIG_X86_MCE_AMD
160 void mce_amd_feature_init(struct cpuinfo_x86 *c);
162 static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { }
165 int mce_available(struct cpuinfo_x86 *c);
167 DECLARE_PER_CPU(unsigned, mce_exception_count);
168 DECLARE_PER_CPU(unsigned, mce_poll_count);
170 extern atomic_t mce_entry;
172 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
173 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
176 MCP_TIMESTAMP = (1 << 0), /* log time stamp */
177 MCP_UC = (1 << 1), /* log uncorrected errors */
178 MCP_DONTLOG = (1 << 2), /* only clear, don't log */
180 void machine_check_poll(enum mcp_flags flags, mce_banks_t *b);
182 int mce_notify_irq(void);
183 void mce_notify_process(void);
185 DECLARE_PER_CPU(struct mce, injectm);
187 extern void register_mce_write_callback(ssize_t (*)(struct file *filp,
188 const char __user *ubuf,
189 size_t usize, loff_t *off));
195 /* Call the installed machine check handler for this CPU setup. */
196 extern void (*machine_check_vector)(struct pt_regs *, long error_code);
197 void do_machine_check(struct pt_regs *, long);
203 extern void (*mce_threshold_vector)(void);
204 extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
210 void intel_init_thermal(struct cpuinfo_x86 *c);
212 void mce_log_therm_throt_event(__u64 status);
214 /* Interrupt Handler for core thermal thresholds */
215 extern int (*platform_thermal_notify)(__u64 msr_val);
217 /* Interrupt Handler for package thermal thresholds */
218 extern int (*platform_thermal_package_notify)(__u64 msr_val);
220 /* Callback support of rate control, return true, if
221 * callback has rate control */
222 extern bool (*platform_thermal_package_rate_control)(void);
224 #ifdef CONFIG_X86_THERMAL_VECTOR
225 extern void mcheck_intel_therm_init(void);
227 static inline void mcheck_intel_therm_init(void) { }
231 * Used by APEI to report memory error via /dev/mcelog
234 struct cper_sec_mem_err;
235 extern void apei_mce_report_mem_error(int corrected,
236 struct cper_sec_mem_err *mem_err);
238 #endif /* _ASM_X86_MCE_H */