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x86, microcode: Reload microcode on resume

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Normally, we do reapply microcode on resume. However, in the cases where
that microcode comes from the early loader and the late loader hasn't
been utilized yet, there's no easy way for us to go and apply the patch
applied during boot by the early loader.

Thus, reuse the patch stashed by the early loader for the BSP.

Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Borislav Petkov
2014-12-03 17:21:41 +01:00
parent a18a0f6850
commit fbae4ba8c4
7 changed files with 84 additions and 16 deletions
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arch/x86/include/asm/microcode_amd.h
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@@ -68,10 +68,12 @@ extern u8 amd_ucode_patch[PATCH_MAX_SIZE];
extern void __init load_ucode_amd_bsp(void);
extern void load_ucode_amd_ap(void);
extern int __init save_microcode_in_initrd_amd(void);
void reload_ucode_amd(void);
#else
static inline void __init load_ucode_amd_bsp(void) {}
static inline void load_ucode_amd_ap(void) {}
static inline int __init save_microcode_in_initrd_amd(void) { return -EINVAL; }
void reload_ucode_amd(void) {}
#endif
#endif /* _ASM_X86_MICROCODE_AMD_H */