On Wed, Sep 06, 2023 at 06:08:52PM +0300, Avihai Horon wrote: > VFIO migration is not compatible with postcopy migration. A VFIO device > in the destination can't handle page faults for pages that have not been > sent yet. > > Doing such migration will cause the VM to crash in the destination: > > qemu-system-x86_64: VFIO_MAP_DMA failed: Bad address > qemu-system-x86_64: vfio_dma_map(0x55a28c7659d0, 0xc0000, 0xb000, > 0x7f1b11a00000) = -14 (Bad address) > qemu: hardware error: vfio: DMA mapping failed, unable to continue > > To prevent this, block VFIO migration with postcopy migration. > > Reported-by: Yanghang Liu <yangh...@redhat.com> > Signed-off-by: Avihai Horon <avih...@nvidia.com> > Tested-by: Yanghang Liu <yangh...@redhat.com>
Reviewed-by: Peter Xu <pet...@redhat.com> -- Peter Xu
