On Wed, Mar 05, 2025 at 06:38:04PM -0600, Kim Phillips wrote:
> From: Kishon Vijay Abraham I <kvijayab@xxxxxxx>
>
> Add CPU feature detection for "Allowed SEV Features" to allow the
> Hypervisor to enforce that SEV-ES and SEV-SNP guest VMs cannot
> enable features (via SEV_FEATURES) that the Hypervisor does not
> support or wish to be enabled.
>
> Signed-off-by: Kishon Vijay Abraham I <kvijayab@xxxxxxx>
> Reviewed-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
> Signed-off-by: Kim Phillips <kim.phillips@xxxxxxx>
> ---
> 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 8f8aaf94dc00..6a12c8c48bd2 100644
> --- a/arch/x86/include/asm/cpufeatures.h
> +++ b/arch/x86/include/asm/cpufeatures.h
> @@ -454,6 +454,7 @@
> #define X86_FEATURE_DEBUG_SWAP (19*32+14) /* "debug_swap" SEV-ES full debug state swap support */
> #define X86_FEATURE_RMPREAD (19*32+21) /* RMPREAD instruction */
> #define X86_FEATURE_SEGMENTED_RMP (19*32+23) /* Segmented RMP support */
> +#define X86_FEATURE_ALLOWED_SEV_FEATURES (19*32+27) /* Allowed SEV Features */
> #define X86_FEATURE_SVSM (19*32+28) /* "svsm" SVSM present */
> #define X86_FEATURE_HV_INUSE_WR_ALLOWED (19*32+30) /* Allow Write to in-use hypervisor-owned pages */
>
> --
I guess this goes thru Sean:
Acked-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
