Re: [edk2-devel] [PATCH v3 0/2] OvmfPkg: Enable measured direct boot on AMD SEV-SNP

["Ard Biesheuvel" <ardb@kernel.org>]

On Mon, 27 Nov 2023 at 21:04, Tom Lendacky <thomas.lendacky@amd.com> wrote:
>
> On 3/20/23 05:06, Gerd Hoffmann wrote:
> > On Thu, Mar 02, 2023 at 09:15:30AM +0000, Dov Murik wrote:
> >> AMD SEV and SEV-ES support measured direct boot with
> >> kernel/initrd/cmdline hashes injected by QEMU and verified by OVMF
> >> during boot.
> >>
> >> To enable the same approach for AMD SEV-SNP, we declare the kernel
> >> hashes page in the SNP metadata list as a new region type.  When QEMU
> >> encounters that region in the list, it will insert the hashes of
> >> kernel/initrd/cmdline and encrypt the page (or, if the user turned off
> >> kernel hashes, it will validate the page as a zero page).
> >>
> >> The first patch rearranges the pages in AmdSevX64's MEMFD so they are in
> >> the same order both as in the main target (OvmfPkgX64), with the
> >> exception of the SEV Launch Secret page which isn't defined in
> >> OvmfPkgX64.
> >>
> >> The second patch modifies the SNP metadata structure such that on
> >> AmdSev target the SEV Launch Secret page is explicitly defined in SNP
> >> metadata list, and therefore it is not included in the ranges that are
> >> pre-validated (zero pages) by the VMM; instead the VMM will insert
> >> content into this page (the hashes table), or mark it explicitly as a
> >> zero page if no hashes are added.
> >>
> >> This series is available at:
> >> https://github.com/confidential-containers-demo/edk2/tree/snp-kernel-hashes-v3
> >>
> >> A corresponding QEMU RFC series will be published soon in qemu-devel, or
> >> use this tree:
> >> https://github.com/confidential-containers-demo/qemu/tree/snp-kernel-hashes-v3
> >
> > For the series:
> > Acked-by: Gerd Hoffmann <kraxel@redhat.com>
>
> I've noticed that series was never picked up. Any chance that this can be
> merged?
>

Queued up now

Apologies for the delay.


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