On Tue, Mar 13, 2018 at 11:14:54PM +0000, Igor Druzhinin wrote: > This should help to avoid problems with accessing the device after > migration/resume without PV drivers by migrating its PCI configuration > space state. Without an explicitly defined state record it resets > every time a VM migrates which confuses the OS and makes every > access to xen-pvdevice MMIO region to fail. PV tools enable some > logic to save and restore PCI configuration state from within the VM > every time it migrates which basically hides the issue. > > Older systems will acquire the new record when migrated which should > not change their state for worse. > > Signed-off-by: Igor Druzhinin <igor.druzhi...@citrix.com> > Reviewed-by: Paul Durrant <paul.durr...@citrix.com> > --- > v2: add more concrete info > --- > hw/i386/xen/xen_pvdevice.c | 11 +++++++++++ > 1 file changed, 11 insertions(+)
Acked-by: Anthony PERARD <anthony.per...@citrix.com> Thanks, -- Anthony PERARD
