Re: [PATCH v3 1/1] x86/tdx: Handle MWAIT, MONITOR and WBINVD

[Kuppuswamy, Sathyanarayanan]

On 3/29/21 4:23 PM, Andy Lutomirski wrote:
> > On Mar 29, 2021, at 4:17 PM, Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
> >
> > In non-root TDX guest mode, MWAIT, MONITOR and WBINVD instructions
> > are not supported. So handle #VE due to these instructions
> > appropriately.
>
> Is there something I missed elsewhere in the code that checks CPL?
We don't check for CPL explicitly. But if we are reaching here, then we
executing these instructions with wrong CPL.
>

--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer