mirror of
https://github.com/torvalds/linux.git
synced 2024-09-29 03:13:05 +00:00
65cef1311d
Add a cmdline param which disables the microcode loader. This is useful mostly in debugging situations where we want to turn off microcode loading, both early from the initrd and late, as a means to be able to rule out its influence on the machine. Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1400525957-11525-3-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@zytor.com>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
#ifndef _ASM_X86_MICROCODE_H
|
|
#define _ASM_X86_MICROCODE_H
|
|
|
|
#define native_rdmsr(msr, val1, val2) \
|
|
do { \
|
|
u64 __val = native_read_msr((msr)); \
|
|
(void)((val1) = (u32)__val); \
|
|
(void)((val2) = (u32)(__val >> 32)); \
|
|
} while (0)
|
|
|
|
#define native_wrmsr(msr, low, high) \
|
|
native_write_msr(msr, low, high)
|
|
|
|
#define native_wrmsrl(msr, val) \
|
|
native_write_msr((msr), \
|
|
(u32)((u64)(val)), \
|
|
(u32)((u64)(val) >> 32))
|
|
|
|
struct cpu_signature {
|
|
unsigned int sig;
|
|
unsigned int pf;
|
|
unsigned int rev;
|
|
};
|
|
|
|
struct device;
|
|
|
|
enum ucode_state { UCODE_ERROR, UCODE_OK, UCODE_NFOUND };
|
|
extern bool dis_ucode_ldr;
|
|
|
|
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
|
|
|
|
#ifdef CONFIG_MICROCODE_EARLY
|
|
#define MAX_UCODE_COUNT 128
|
|
extern void __init load_ucode_bsp(void);
|
|
extern void load_ucode_ap(void);
|
|
extern int __init save_microcode_in_initrd(void);
|
|
#else
|
|
static inline void __init load_ucode_bsp(void) {}
|
|
static inline void load_ucode_ap(void) {}
|
|
static inline int __init save_microcode_in_initrd(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _ASM_X86_MICROCODE_H */
|