On Tue, Apr 29, 2014 at 06:17:17PM -0300, Eduardo Habkost wrote: > KVM never supported the MONITOR flag so it doesn't make sense to have it > enabled by default when KVM is enabled. > > The rationale here is similar to the cases where it makes sense to have > a feature enabled by default on all CPU models when on KVM mode (e.g. > x2apic). In this case we are having a feature disabled by default for > the same reasons. > > In this case we don't need machine-type compat code because it is > currently impossible to run a KVM VM with the MONITOR flag set. > > Signed-off-by: Eduardo Habkost <ehabk...@redhat.com>
Why relying on the kernel filtering is not sufficient ?