Am 05.11.2013 um 05:00 schrieb Paul Mackerras <pau...@samba.org>:
> On Mon, Nov 04, 2013 at 10:05:58AM +0100, Alexander Graf wrote: >> >> Yeah, we really need to check that guest vpcu == host vcpu for HV KVM. > > In general I agree, but the one difficulty I see is that a check for > exact equality will interact badly with qemu's habit of picking a > specific processor version when the user specifies something general > like "POWER7". So if the user does -cpu POWER7 on a machine with > (for example) a POWER7 v2.1 processor, but qemu arbitrarily picks the > PVR for POWER7 v2.3, then it will fail, which will be completely > puzzling to the user -- "I asked for POWER7, and it is a POWER7, > what's the problem??". > > Maybe if the user asks for a non-specific processor type, and the > host's PVR matches the request, then qemu should take the host's PVR > rather than just picking some arbitrary processor version. Yup. Alex
