On 16.12.2021 10:54, Andrew Cooper wrote:
> Protection Key Supervisor works in a very similar way to Protection Key User,
> except that instead of a PKRU register used by the {RD,WR}PKRU instructions,
> the supervisor protection settings live in MSR_PKRS and is accessed using
> normal {RD,WR}MSR instructions.
>
> PKS has the same problematic interactions with PV guests as PKU (more infact,
> given the guest kernel's CPL), so we'll only support this for HVM guests for
> now.
>
> Signed-off-by: Andrew Cooper <[email protected]>
Reviewed-by: Jan Beulich <[email protected]>
