On Tue, Aug 28, 2012 at 01:23:18PM -0300, Marcelo Tosatti wrote: > On Mon, Aug 27, 2012 at 03:20:13PM +0300, Michael S. Tsirkin wrote: > > In preparation to adding PV EOI migration for 1.2, > > trivially refactor some some compat code > > to make it easier to add version specific > > cpuid tweaks. > > > > Signed-off-by: Michael S. Tsirkin <m...@redhat.com> > > --- > > hw/pc_piix.c | 44 ++++++++++++++++++++++++++++++++++++-------- > > 1 file changed, 36 insertions(+), 8 deletions(-) > > Why can't you clear the cpuid bit in kvm paravirt leaf at hw/pc_piix.c, > leaving compat code isolated there?
This is not how we handle it for compat properties: there we set flag in pc_piix and make devices look at that flag. And it makes sense because what you suggest does not scale: we can not teach pc_piix about quirks of all hardware. It will also scale better if we ever get interested about compatibility and migration for non pc machines. -- MST
