Re: [edk2-devel] [PATCH v9 0/4] Add safe unaccepted memory behavior

["Gerd Hoffmann" <kraxel@redhat.com>]

On Fri, Jan 13, 2023 at 10:34:15AM -0800, Dave Hansen wrote:
> On 1/13/23 10:23, Dionna Glaze via groups.io wrote:
> >> However, *NONE* of this points me in the direction of saying that we
> >> should have an OS/firmware protocol to negotiate whether the firmware or
> >> OS does page acceptance other than the existing UEFI memory map bit.
> > We know of distributions that are going to release SEV-SNP support
> > without unaccepted memory support,
> 
> Well, I guess that's a bit of a different problem.
> 
> I'd love to hear from the distros what they're planning on carrying
> outside of mainline and what their plans are for the kernel side of this
> series.

Fedora has near zero additional patches, so it pretty much depends on
how mainline merges stuff.  If SEV-SNP or TDX or both will land in an
upstream release before support for unaccepted memory lands too you'll
see that in Fedora kernels, and I guess likewise in most non-enterprise
distros.

RHEL/CentOS typically requires mainline acceptance too for backports, so
it likewise depends on upstream merging, and additionally rhel release
planning comes into play.  In case unaccepted memory support lands later
than TDX it could (depending on timing) very well be that the choices
are to either backport TDX without unaccepted memory support, or move
both TDX support and unaccepted memory support to a later release.

take care,
  Gerd