On Fri, May 24, 2019 at 03:56:35PM +0800, Tao Xu wrote: > This patch adds support for UMONITOR, UMWAIT and TPAUSE instructions > in kvm, and by default dont't expose it to kvm and provide a capability > to enable it. I'm thinking this should be conditional on the guest being a 1:1 guest, and I also seem to remember we have bits for that already -- they were used to disable paravirt spinlocks for example.