On Wed, Jan 26, 2022, Maxim Levitsky wrote: > On Tue, 2022-01-25 at 22:03 +0000, Sean Christopherson wrote: > > Peeking at QEMU source, AFAICT QEMU restores nested state before events, > > but I don't see how that can possibly work. I assume QEMU does something > > where it restores the "run" state first and then does a full restore? > > Well, according to my testing, nested migration with SMM *is* still quite broken, > (on both SVM and VMX) > resulting in various issues up to L1 crash. > > When I last tackled SMM, I fixed most issues that > happen just when the L2 is running and I inject flood of SMIs to L1 - even that > was crashing things all around, so this might be as well the reason for that. Heh, that would certainly explain why QEMU's code looks broken. Thanks!
