On Tue, 24 Jan 2023 at 23:42, Lendacky, Thomas via groups.io <thomas.lendacky=amd....@groups.io> wrote: > > On 1/16/23 04:28, Gerd Hoffmann via groups.io wrote: > > 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 > > Sorry, just saw this... > > SEV-SNP guest support has already landed upstream and is part of the 5.19 > kernel. So without this interface, anyone using a newer OVMF with a 5.19 > to whatever kernel just before unaccepted memory finally gets pulled into, > would have issues. >
Exactly. And my Fedora kernel has those bits enabled by default. So I suppose the way forward here is to expose this protocol only on OVMF builds that target SEV-SNP, instead of introducing it as a generic CoCo feature. On the Linux side, we can make its boot time invocation dependent on CONFIG_AMD_MEM_ENCRYPT as well as CONFIG_UNACCEPTED_MEMORY. -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#99003): https://edk2.groups.io/g/devel/message/99003 Mute This Topic: https://groups.io/mt/96236145/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
