Hey Dionna
Thanks for the patch.
I am just back from vocation.

Please allow me to digest those information and I will reply after couple of 
days.

Thank You
Yao Jiewen


From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Dionna Glaze via 
groups.io
Sent: Wednesday, July 13, 2022 7:13 AM
To: devel@edk2.groups.io
Cc: Yao, Jiewen <jiewen....@intel.com>; Gao, Jiaqi <jiaqi....@intel.com>; 
Lendacky, Thomas <thomas.lenda...@amd.com>; Gerd Hoffmann <kra...@redhat.com>
Subject: [edk2-devel] Trying to get a boot service in before 2.10 is finalized, 
is that possible?

Hi y'all, I'm just getting up to speed with the standards process now that 
we've determined the only way to get lazy accept support for SEV-SNP without 
extra information about what's being booted is to add a GetMemoryMapEx that 
takes a "supported features" argument.

I saw the final draft was sent to forum members not too long ago, and if we 
miss 2.10 on this, then AMD SEV-SNP boot times will be several seconds slower 
on VMs with large memory footprints.

I have a pretty trivial change that builds on top of changes Jiewen Yao and 
Jiaqi Gao have proposed for TDX, but since those aren't yet merged, I'm not 
entirely sure what the right "code first" process is to make this proposal.

I have the relevant commits cherry picked into a fork plus two from Google that 
add this new boot service. It'd be great for a guest OS to be able to opt into 
unaccepted memory support given a UEFI v2.10 version in the EFI system table.

https://github.com/deeglaze/edk2/tree/getmemorymapex

Relevant thread from qemu: 
https://www.mail-archive.com/qemu-devel@nongnu.org/msg894170.html

Thanks y'all

--
-Dionna Glaze, PhD (she/her)



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