On Tue, Feb 16, 2010 at 11:04:10AM +0100, Jan Kiszka wrote: > Gleb Natapov wrote: > > On Tue, Feb 16, 2010 at 10:16:12AM +0100, Jan Kiszka wrote: > >> Found while browsing Xen code: While we assume that the STI interrupt > >> shadow also inplies virtual NMI blocking, some processors may have a > >> different opinion (SDM 3: 22.3). To avoid misunderstandings that would > >> cause endless VM entry attempts, translate STI into MOV SS blocking when > >> requesting the NMI window. > >> > > Why not just remove "block by STI" check in vmx_nmi_allowed()? IIRC this > > is documented that on some CPUs STI does not block NMI. > > > > Probably because we will stumble and fall on those CPUs that do care. > But this defines behaviour of cpu _we_ emulate. So on _our_ cpu NMI will not be blocked by STI. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
