LXR linux/arch/x86/kernel/cpu/mcheck/mce-internal.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __X86_MCE_INTERNAL_H__
   3#define __X86_MCE_INTERNAL_H__
   4
   5#include <linux/device.h>
   6#include <asm/mce.h>
   7
   8enum severity_level {
   9        MCE_NO_SEVERITY,
  10        MCE_DEFERRED_SEVERITY,
  11        MCE_UCNA_SEVERITY = MCE_DEFERRED_SEVERITY,
  12        MCE_KEEP_SEVERITY,
  13        MCE_SOME_SEVERITY,
  14        MCE_AO_SEVERITY,
  15        MCE_UC_SEVERITY,
  16        MCE_AR_SEVERITY,
  17        MCE_PANIC_SEVERITY,
  18};
  19
  20extern struct blocking_notifier_head x86_mce_decoder_chain;
  21
  22#define ATTR_LEN                16
  23#define INITIAL_CHECK_INTERVAL  5 * 60 /* 5 minutes */
  24
  25/* One object for each MCE bank, shared by all CPUs */
  26struct mce_bank {
  27        u64                     ctl;                    /* subevents to enable */
  28        unsigned char init;                             /* initialise bank? */
  29        struct device_attribute attr;                   /* device attribute */
  30        char                    attrname[ATTR_LEN];     /* attribute name */
  31};
  32
  33struct mce_evt_llist {
  34        struct llist_node llnode;
  35        struct mce mce;
  36};
  37
  38void mce_gen_pool_process(struct work_struct *__unused);
  39bool mce_gen_pool_empty(void);
  40int mce_gen_pool_add(struct mce *mce);
  41int mce_gen_pool_init(void);
  42struct llist_node *mce_gen_pool_prepare_records(void);
  43
  44extern int (*mce_severity)(struct mce *a, int tolerant, char **msg, bool is_excp);
  45struct dentry *mce_get_debugfs_dir(void);
  46
  47extern struct mce_bank *mce_banks;
  48extern mce_banks_t mce_banks_ce_disabled;
  49
  50#ifdef CONFIG_X86_MCE_INTEL
  51unsigned long cmci_intel_adjust_timer(unsigned long interval);
  52bool mce_intel_cmci_poll(void);
  53void mce_intel_hcpu_update(unsigned long cpu);
  54void cmci_disable_bank(int bank);
  55#else
  56# define cmci_intel_adjust_timer mce_adjust_timer_default
  57static inline bool mce_intel_cmci_poll(void) { return false; }
  58static inline void mce_intel_hcpu_update(unsigned long cpu) { }
  59static inline void cmci_disable_bank(int bank) { }
  60#endif
  61
  62void mce_timer_kick(unsigned long interval);
  63
  64#ifdef CONFIG_ACPI_APEI
  65int apei_write_mce(struct mce *m);
  66ssize_t apei_read_mce(struct mce *m, u64 *record_id);
  67int apei_check_mce(void);
  68int apei_clear_mce(u64 record_id);
  69#else
  70static inline int apei_write_mce(struct mce *m)
  71{
  72        return -EINVAL;
  73}
  74static inline ssize_t apei_read_mce(struct mce *m, u64 *record_id)
  75{
  76        return 0;
  77}
  78static inline int apei_check_mce(void)
  79{
  80        return 0;
  81}
  82static inline int apei_clear_mce(u64 record_id)
  83{
  84        return -EINVAL;
  85}
  86#endif
  87
  88void mce_inject_log(struct mce *m);
  89
  90/*
  91 * We consider records to be equivalent if bank+status+addr+misc all match.
  92 * This is only used when the system is going down because of a fatal error
  93 * to avoid cluttering the console log with essentially repeated information.
  94 * In normal processing all errors seen are logged.
  95 */
  96static inline bool mce_cmp(struct mce *m1, struct mce *m2)
  97{
  98        return m1->bank != m2->bank ||
  99                m1->status != m2->status ||
 100                m1->addr != m2->addr ||
 101                m1->misc != m2->misc;
 102}
 103
 104extern struct device_attribute dev_attr_trigger;
 105
 106#ifdef CONFIG_X86_MCELOG_LEGACY
 107void mce_work_trigger(void);
 108void mce_register_injector_chain(struct notifier_block *nb);
 109void mce_unregister_injector_chain(struct notifier_block *nb);
 110#else
 111static inline void mce_work_trigger(void)       { }
 112static inline void mce_register_injector_chain(struct notifier_block *nb)       { }
 113static inline void mce_unregister_injector_chain(struct notifier_block *nb)     { }
 114#endif
 115
 116extern struct mca_config mca_cfg;
 117
 118#endif /* __X86_MCE_INTERNAL_H__ */
 119