/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __X86_MCE_INTERNAL_H__
#define __X86_MCE_INTERNAL_H__

#undef pr_fmt
#define pr_fmt(fmt) "mce: " fmt

#include <linux/device.h>
#include <asm/mce.h>

enum severity_level {

extern struct blocking_notifier_head x86_mce_decoder_chain;

#define INITIAL_CHECK_INTERVAL	5 * 60 /* 5 minutes */

struct mce_evt_llist {
	struct llist_node llnode;
	struct mce mce;

void mce_gen_pool_process(struct work_struct *__unused);
bool mce_gen_pool_empty(void);
int mce_gen_pool_add(struct mce *mce);
int mce_gen_pool_init(void);
struct llist_node *mce_gen_pool_prepare_records(void);

int mce_severity(struct mce *a, struct pt_regs *regs, char **msg, bool is_excp);
struct dentry *mce_get_debugfs_dir(void);

extern mce_banks_t mce_banks_ce_disabled;

unsigned long cmci_intel_adjust_timer(unsigned long interval);
bool mce_intel_cmci_poll(void);
void mce_intel_hcpu_update(unsigned long cpu);
void cmci_disable_bank(int bank);
void intel_init_cmci(void);
void intel_init_lmce(void);
void intel_clear_lmce(void);
bool intel_filter_mce(struct mce *m);
# define cmci_intel_adjust_timer mce_adjust_timer_default
static inline bool mce_intel_cmci_poll(void) { return false; }
static inline void mce_intel_hcpu_update(unsigned long cpu) { }
static inline void cmci_disable_bank(int bank) { }
static inline void intel_init_cmci(void) { }
static inline void intel_init_lmce(void) { }
static inline void intel_clear_lmce(void) { }
static inline bool intel_filter_mce(struct mce *m) { return false; }

void mce_timer_kick(unsigned long interval);

int apei_write_mce(struct mce *m);
ssize_t apei_read_mce(struct mce *m, u64 *record_id);
int apei_check_mce(void);
int apei_clear_mce(u64 record_id);
static inline int apei_write_mce(struct mce *m)
	return -EINVAL;
static inline ssize_t apei_read_mce(struct mce *m, u64 *record_id)
	return 0;
static inline int apei_check_mce(void)
	return 0;
static inline int apei_clear_mce(u64 record_id)
	return -EINVAL;

 * We consider records to be equivalent if bank+status+addr+misc all match.
 * This is only used when the system is going down because of a fatal error
 * to avoid cluttering the console log with essentially repeated information.
 * In normal processing all errors seen are logged.
static inline bool mce_cmp(struct mce *m1, struct mce *m2)
	return m1->bank != m2->bank ||
		m1->status != m2->status ||
		m1->addr != m2->addr ||
		m1->misc != m2->misc;

extern struct device_attribute dev_attr_trigger;

void mce_work_trigger(void);
void mce_register_injector_chain(struct notifier_block *nb);
void mce_unregister_injector_chain(struct notifier_block *nb);
static inline void mce_work_trigger(void)	{ }
static inline void mce_register_injector_chain(struct notifier_block *nb)	{ }
static inline void mce_unregister_injector_chain(struct notifier_block *nb)	{ }

struct mca_config {
	__u64 lmce_disabled		: 1,
	      disabled			: 1,
	      ser			: 1,
	      recovery			: 1,
	      bios_cmci_threshold	: 1,
	      /* Proper #MC exception handler is set */
	      initialized		: 1,
	      __reserved		: 58;

	bool dont_log_ce;
	bool cmci_disabled;
	bool ignore_ce;
	bool print_all;

	int monarch_timeout;
	int panic_timeout;
	u32 rip_msr;
	s8 bootlog;

extern struct mca_config mca_cfg;
DECLARE_PER_CPU_READ_MOSTLY(unsigned int, mce_num_banks);

struct mce_vendor_flags {
	 * Indicates that overflow conditions are not fatal, when set.
	__u64 overflow_recov	: 1,

	 * (AMD) SUCCOR stands for S/W UnCorrectable error COntainment and
	 * Recovery. It indicates support for data poisoning in HW and deferred
	 * error interrupts.
	succor			: 1,

	 * (AMD) SMCA: This bit indicates support for Scalable MCA which expands
	 * the register space for each MCA bank and also increases number of
	 * banks. Also, to accommodate the new banks and registers, the MCA
	 * register space is moved to a new MSR range.
	smca			: 1,

	/* AMD-style error thresholding banks present. */
	amd_threshold		: 1,

	/* Pentium, family 5-style MCA */
	p5			: 1,

	/* Centaur Winchip C6-style MCA */
	winchip			: 1,

	/* SandyBridge IFU quirk */
	snb_ifu_quirk		: 1,

	/* Skylake, Cascade Lake, Cooper Lake REP;MOVS* quirk */
	skx_repmov_quirk	: 1,

	__reserved_0		: 56;

extern struct mce_vendor_flags mce_flags;

enum mca_msr {

/* Decide whether to add MCE record to MCE event pool or filter it out. */
extern bool filter_mce(struct mce *m);

extern bool amd_filter_mce(struct mce *m);
static inline bool amd_filter_mce(struct mce *m) { return false; }

void intel_p5_mcheck_init(struct cpuinfo_x86 *c);
void winchip_mcheck_init(struct cpuinfo_x86 *c);
noinstr void pentium_machine_check(struct pt_regs *regs);
noinstr void winchip_machine_check(struct pt_regs *regs);
static inline void enable_p5_mce(void) { mce_p5_enabled = 1; }
static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {}
static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
static inline void enable_p5_mce(void) {}
static inline void pentium_machine_check(struct pt_regs *regs) {}
static inline void winchip_machine_check(struct pt_regs *regs) {}

noinstr u64 mce_rdmsrl(u32 msr);

static __always_inline u32 mca_msr_reg(int bank, enum mca_msr reg)
	if (mce_flags.smca) {
		switch (reg) {
		case MCA_CTL:	 return MSR_AMD64_SMCA_MCx_CTL(bank);
		case MCA_ADDR:	 return MSR_AMD64_SMCA_MCx_ADDR(bank);
		case MCA_MISC:	 return MSR_AMD64_SMCA_MCx_MISC(bank);
		case MCA_STATUS: return MSR_AMD64_SMCA_MCx_STATUS(bank);

	switch (reg) {
	case MCA_CTL:	 return MSR_IA32_MCx_CTL(bank);
	case MCA_ADDR:	 return MSR_IA32_MCx_ADDR(bank);
	case MCA_MISC:	 return MSR_IA32_MCx_MISC(bank);
	case MCA_STATUS: return MSR_IA32_MCx_STATUS(bank);

	return 0;

#endif /* __X86_MCE_INTERNAL_H__ */