diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-16 11:57:53 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-16 11:57:53 +0100 |
| commit | a47b66da0380dd1ebcf2fbfa5fc41c4b6af8a460 (patch) | |
| tree | 3e1e18183f2041d534a1a763af95df1ec460e044 /arch/x86/include/asm/microcode_intel.h | |
| parent | 1129d270cbfbb7e2b1ec3dede4a13930bdd10e41 (diff) | |
| parent | 49def1853334396f948dcb4cedb9347abb318df5 (diff) | |
Merge 4.10-rc4 into usb-next
We need the USB fixes in here to make merges easier/possible with the
other sub-maintainer USB trees.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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); |