On 7/22/25 5:28 AM, Jason Wang wrote: > On Fri, Jul 18, 2025 at 4:53 PM Paolo Abeni <pab...@redhat.com> wrote: >> >> Extend the features configuration space to 128 bits, and allow the >> common read/write operation to access all of it. >> >> On migration, save the 128 bit version of the features only if the >> upper bits are non zero. Relay reset to clear all the feature >> space before load. >> >> Signed-off-by: Paolo Abeni <pab...@redhat.com> > > This is a guest noticeable behaviour change. I wonder if we need a > command line option to enable and disable this feature for migration > compatibility.
This point is not clear to me, could you please elaborate a bit more? do you mean we need i.e. a DEFINE_PROP_BOOL() or the like to enable the 128 bit space usage? Thanks, Paolo
