Re: [PATCH v9 07/13] KVM: guest_memfd: Add flag to remove from direct map

[Nikita Kalyazin]

On 16/01/2026 15:41, Sean Christopherson wrote:
> On Fri, Jan 16, 2026, Rick P Edgecombe wrote:
> > On Fri, 2026-01-16 at 15:02 +0000, Nikita Kalyazin wrote:
> > > > TDX does some clearing at the direct map mapping for pages that
> > > > comes from gmem, using a special instruction. It also does some
> > > > clflushing at the direct map address for these pages. So I think we
> > > > need to make sure TDs don't pull from gmem fds with this flag.
> > >
> > > Would you be able to give a pointer on how we can do that?  I'm not
> > > very familiar with the TDX code.
> >
> > Uhh, that is a good question. Let me think.
>
> Pass @kvm to kvm_arch_gmem_supports_no_direct_map() and then return %false if
> it's a TDX VM.

Sounds good to me, thanks.