On 11/27/2017 07:13 PM, Jim Mattson wrote: > I don't understand the concern regarding CPUID5_ECX_INTERRUPT_BREAK. > Even if the CPU has this feature, can't the guest bypass it by > disabling interrupts and invoking MWAIT with bit 0 of ECX clear? Note, that there was this series at some point: [PATCH 0/4] KVM: x86: kvm_mwait_in_guest() cleanup and fixes https://www.spinics.net/lists/kvm/msg149238.html That throws away most of the function. No sure, what happened to that. Radim? Regards Jan
