Re: [PATCH v2 1/7] x86/cpufeatures: Add X86_FEATURE_AMD_RMPOPT feature flag

[Dave Hansen]

On 3/2/26 13:35, Ashish Kalra wrote:
> From: Ashish Kalra <ashish.kalra@xxxxxxx>
> 
> Add a flag indicating whether RMPOPT instruction is supported.
> 
> RMPOPT is a new instruction designed to minimize the performance
> overhead of RMP checks on the hypervisor and on non-SNP guests by
> allowing RMP checks to be skipped when 1G regions of memory are known
> not to contain any SEV-SNP guest memory.
> 
> For more information on the RMPOPT instruction, see the AMD64 RMPOPT
> technical documentation. [1]

Reviewed-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>