On 1/12/23 05:28, Borislav Petkov wrote:
On Thu, Jan 12, 2023 at 04:45:34PM +1100, Alexey Kardashevskiy wrote:
Well, SEV-ES KVM (ES == Encrypted State) does not save/restore them for the
guest (well, as I would expect) as the guest registers are not visible to
host to save, they are intercepted and the VM does this GHCB dance with
VMGEXIT(SVM_EXIT_WRITE_DR7).
But they're saved in the VMSA, as Table B-3 says.
Correct, when this feature is enabled, the VMRUN execution will restore
the guest debug registers on guest entry and save them on guest exit.
Thanks,
Tom
Well, the only place in APM is that "Table B-3. Swap Types and the AMD APM
volume 2", and it is pretty brief, do I miss something?
I don't understand that question - please elaborate.
Thx.
