"Dr. David Alan Gilbert (git)" <dgilb...@redhat.com> wrote: > From: "Dr. David Alan Gilbert" <dgilb...@redhat.com> > > ACS got added in 4.0 unconditionally, that broke older<->4.0 migration > where there was a PCIe root port. > Fix this by turning it off for 3.1 and older machines; note this > fixes compatibility for older QEMUs but breaks compatibility with 4.0 > for older machine types. > > machine type source qemu dest qemu > 3.1 3.1 4.0 broken > 3.1 3.1 4.1rc2 broken > 3.1 3.1 4.1+this OK ++ > 3.1 4.0 4.1rc2 OK > 3.1 4.0 4.1+this broken -- > 4.0 4.0 4.1rc2 OK > 4.0 4.0 4.1+this OK > > So we gain and lose; the consensus seems to be treat this as a > fix for older machine types. > > Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com> > ---
Reviewed-by: Juan Quintela <quint...@redhat.com>
