microcode.h

Go to the documentation of this file.

#ifndef _ASM_X86_MICROCODE_H
#define _ASM_X86_MICROCODE_H

struct cpu_signature {
    unsigned int sig;
    unsigned int pf;
    unsigned int rev;
};

struct device;

enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };

struct microcode_ops {
    enum ucode_state (*request_microcode_user) (int cpu,
                const void __user *buf, size_t size);

    enum ucode_state (*request_microcode_fw) (int cpu, struct device *,
                          bool refresh_fw);

    void (*microcode_fini_cpu) (int cpu);

    /*
     * The generic 'microcode_core' part guarantees that
     * the callbacks below run on a target cpu when they
     * are being called.
     * See also the "Synchronization" section in microcode_core.c.
     */
    int (*apply_microcode) (int cpu);
    int (*collect_cpu_info) (int cpu, struct cpu_signature *csig);
};

struct ucode_cpu_info {
    struct cpu_signature    cpu_sig;
    int         valid;
    void            *mc;
};
extern struct ucode_cpu_info ucode_cpu_info[];

#ifdef CONFIG_MICROCODE_INTEL
extern struct microcode_ops * __init init_intel_microcode(void);
#else
static inline struct microcode_ops * __init init_intel_microcode(void)
{
    return NULL;
}
#endif /* CONFIG_MICROCODE_INTEL */

#ifdef CONFIG_MICROCODE_AMD
extern struct microcode_ops * __init init_amd_microcode(void);
extern void __exit exit_amd_microcode(void);
#else
static inline struct microcode_ops * __init init_amd_microcode(void)
{
    return NULL;
}
static inline void __exit exit_amd_microcode(void) {}
#endif

#endif /* _ASM_X86_MICROCODE_H */