On Tue, Dec 22, 2020 at 04:31:32PM -0600, Babu Moger wrote:
> Newer AMD processors have a feature to virtualize the use of the
> SPEC_CTRL MSR. Presence of this feature is indicated via CPUID
> function 0x8000000A_EDX[20]: GuestSpecCtrl. When preset, the SPEC_CTRL
> MSR is automatically virtualized.
>
> Signed-off-by: Babu Moger <babu.mo...@amd.com>
> ---
> arch/x86/include/asm/cpufeatures.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/x86/include/asm/cpufeatures.h
> b/arch/x86/include/asm/cpufeatures.h
> index dad350d42ecf..aee4a924ecd7 100644
> --- a/arch/x86/include/asm/cpufeatures.h
> +++ b/arch/x86/include/asm/cpufeatures.h
> @@ -335,6 +335,7 @@
> #define X86_FEATURE_AVIC (15*32+13) /* Virtual Interrupt
> Controller */
> #define X86_FEATURE_V_VMSAVE_VMLOAD (15*32+15) /* Virtual VMSAVE VMLOAD */
> #define X86_FEATURE_VGIF (15*32+16) /* Virtual GIF */
> +#define X86_FEATURE_V_SPEC_CTRL (15*32+20) /* Virtual SPEC_CTRL */
>
> /* Intel-defined CPU features, CPUID level 0x00000007:0 (ECX), word 16 */
> #define X86_FEATURE_AVX512VBMI (16*32+ 1) /* AVX512 Vector Bit
> Manipulation instructions*/
I'm guessing this will go through the kvm tree so:
Acked-by: Borislav Petkov <b...@suse.de>
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
