On Wed, Nov 10, 2021 at 1:45 PM Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > > On 10/15/21 21:55, Jim Mattson wrote: > > This issue is significant enough that it warrants a regression > > test. Unfortunately, at the moment, the best we can do is check for > > the LDTR persistence bug. I'd like to be able to trigger a > > save/restore from within the L2 guest, but AFAICT, there's no way to > > do that under qemu. Does anyone want to implement a qemu ISA test > > device that triggers a save/restore when its configured I/O port is > > written to? > > The selftests infrastructure already has save/restore tests at > instruction granularity (state_test.c) so you should have more luck that > way; these tests are worthwhile anyway. There is also (I just discovered) support for guest-triggerable migration in the kvm-unit-tests [1]. You could use that to trigger a save/restore. [1] Example: https://gitlab.com/kvm-unit-tests/kvm-unit-tests/-/blob/master/arm/gic.c#L798 > > Paolo >
