Re: [PATCH] Allow RDTSC and RDTSCP from userspace

Dave Hansen
2020-04-24T21:24:15Z

On 4/24/20 2:03 PM, Mike Stunes wrote:
> I needed to allow RDTSC(P) from userspace and in early boot in order to
> get userspace started properly. Patch below.
>
> ---
> SEV-ES guests will need to execute rdtsc and rdtscp from userspace and
> during early boot. Move the rdtsc(p) #VC handler into common code and
> extend the #VC handlers.

Do SEV-ES guests _always_ #VC on rdtsc(p)?