Messages in this thread | | | Date | Tue, 19 Jul 2022 17:08:36 -0500 | Subject | Re: [PATCHv7 00/14] mm, x86/cc: Implement support for unaccepted memory | From | Tom Lendacky <> |
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On 7/19/22 17:02, Dave Hansen wrote: > On 7/19/22 14:50, Borislav Petkov wrote: >> On Tue, Jul 19, 2022 at 02:35:45PM -0700, Dave Hansen wrote: >>> They're trying to design something that can (forever) handle guests that >>> might not be able to accept memory. >> Wait, what? >> >> If you can't modify those guests to teach them to accept memory, how do >> you add TDX or SNP guest support to them? > > Mainline today, for instance, doesn't have unaccepted memory support for > TDX or SEV-SNP guests. But, they both still boot fine because folks > either configure it on the host side not to *have* any unaccepted > memory. Or, they just live with the small (4GB??) amount of > pre-accepted memory, which is fine for testing things.
Today, for SEV-SNP, OVMF accepts all of the memory in advance of booting the kernel.
Thanks, Tom
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