linux/arch/x86/kernel/cpu/microcode/internal.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _X86_MICROCODE_INTERNAL_H
#define _X86_MICROCODE_INTERNAL_H

#include <linux/earlycpio.h>
#include <linux/initrd.h>

#include <asm/cpu.h>
#include <asm/microcode.h>

struct device;

enum ucode_state { … };

struct microcode_ops { … };

struct early_load_data { … };

extern struct early_load_data early_data;
extern struct ucode_cpu_info ucode_cpu_info[];
struct cpio_data find_microcode_in_initrd(const char *path);

#define MAX_UCODE_COUNT …

#define QCHAR(a, b, c, d) …
#define CPUID_INTEL1 …
#define CPUID_INTEL2 …
#define CPUID_INTEL3 …
#define CPUID_AMD1 …
#define CPUID_AMD2 …
#define CPUID_AMD3 …

#define CPUID_IS(a, b, c, ebx, ecx, edx) …

/*
 * In early loading microcode phase on BSP, boot_cpu_data is not set up yet.
 * x86_cpuid_vendor() gets vendor id for BSP.
 *
 * In 32 bit AP case, accessing boot_cpu_data needs linear address. To simplify
 * coding, we still use x86_cpuid_vendor() to get vendor id for AP.
 *
 * x86_cpuid_vendor() gets vendor information directly from CPUID.
 */
static inline int x86_cpuid_vendor(void)
{ … }

static inline unsigned int x86_cpuid_family(void)
{ … }

extern bool dis_ucode_ldr;
extern bool force_minrev;

#ifdef CONFIG_CPU_SUP_AMD
void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family);
void load_ucode_amd_ap(unsigned int family);
int save_microcode_in_initrd_amd(unsigned int family);
void reload_ucode_amd(unsigned int cpu);
struct microcode_ops *init_amd_microcode(void);
void exit_amd_microcode(void);
#else /* CONFIG_CPU_SUP_AMD */
static inline void load_ucode_amd_bsp(struct early_load_data *ed, unsigned int family) { }
static inline void load_ucode_amd_ap(unsigned int family) { }
static inline int save_microcode_in_initrd_amd(unsigned int family) { return -EINVAL; }
static inline void reload_ucode_amd(unsigned int cpu) { }
static inline struct microcode_ops *init_amd_microcode(void) { return NULL; }
static inline void exit_amd_microcode(void) { }
#endif /* !CONFIG_CPU_SUP_AMD */

#ifdef CONFIG_CPU_SUP_INTEL
void load_ucode_intel_bsp(struct early_load_data *ed);
void load_ucode_intel_ap(void);
void reload_ucode_intel(void);
struct microcode_ops *init_intel_microcode(void);
#else /* CONFIG_CPU_SUP_INTEL */
static inline void load_ucode_intel_bsp(struct early_load_data *ed) { }
static inline void load_ucode_intel_ap(void) { }
static inline void reload_ucode_intel(void) { }
static inline struct microcode_ops *init_intel_microcode(void) { return NULL; }
#endif  /* !CONFIG_CPU_SUP_INTEL */

#endif /* _X86_MICROCODE_INTERNAL_H */