On Tue, Mar 08, 2011 at 04:29:10PM +0200, Avi Kivity wrote: > On 03/08/2011 04:20 PM, Gleb Natapov wrote: > >On Tue, Mar 08, 2011 at 03:57:40PM +0200, Avi Kivity wrote: > >> We may read the cpl quite often in the same vmexit (instruction privilege > >> check, memory access checks for instruction and operands), so we gain > >> a bit if we cache the value. > >> > >Shouldn't VCPU_EXREG_CPL be cleared in vmx_set_efer too? > > I anticipated that question (which really means that a comment is > needed). Flipping EFER.LMA is done by flipping CR0.PG (and doesn't > affect cpl. in any case). > Ah, so you can't clear LMA by writing to EFER. -- 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
