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| author | Linus Walleij <linus.walleij@linaro.org> | 2017-01-30 14:39:20 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-01-30 14:39:20 +0100 |
| commit | 7f36f5d11cda050b118f76d774151427a18d15ef (patch) | |
| tree | 9d4fa3b830785b767525a5e6a065fe4297cd8112 /arch/x86/include/asm/microcode_intel.h | |
| parent | 2b24efa8e5c5042b0f126c09622b3e9e3c86a4fa (diff) | |
| parent | 566cf877a1fcb6d6dc0126b076aad062054c2637 (diff) | |
Merge tag 'v4.10-rc6' into devel
Linux 4.10-rc6
Resolved conflicts in:
drivers/pinctrl/pinctrl-amd.c
drivers/pinctrl/samsung/pinctrl-exynos.c
Diffstat (limited to 'arch/x86/include/asm/microcode_intel.h')
| -rw-r--r-- | arch/x86/include/asm/microcode_intel.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/include/asm/microcode_intel.h b/arch/x86/include/asm/microcode_intel.h index 195becc6f780..e793fc9a9b20 100644 --- a/arch/x86/include/asm/microcode_intel.h +++ b/arch/x86/include/asm/microcode_intel.h @@ -52,6 +52,21 @@ struct extended_sigtable { #define exttable_size(et) ((et)->count * EXT_SIGNATURE_SIZE + EXT_HEADER_SIZE) +static inline u32 intel_get_microcode_revision(void) +{ + u32 rev, dummy; + + native_wrmsrl(MSR_IA32_UCODE_REV, 0); + + /* As documented in the SDM: Do a CPUID 1 here */ + native_cpuid_eax(1); + + /* get the current revision from MSR 0x8B */ + native_rdmsr(MSR_IA32_UCODE_REV, dummy, rev); + + return rev; +} + #ifdef CONFIG_MICROCODE_INTEL extern void __init load_ucode_intel_bsp(void); extern void load_ucode_intel_ap(void); |