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
