Re: [PATCHv7 00/14] mm, x86/cc: Implement support for unaccepted memory

Dave Hansen
2022-07-19T22:02:32Z

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.