On 02/05/2019 13:29, Jan Beulich wrote: > --- a/xen/drivers/passthrough/pci.c > +++ b/xen/drivers/passthrough/pci.c > @@ -1450,17 +1450,36 @@ static int assign_device(struct domain * > if ( !iommu_enabled || !hd->platform_ops ) > return 0; > > - /* Prevent device assign if mem paging or mem sharing have been > - * enabled for this domain */ > - if ( unlikely(d->arch.hvm.mem_sharing_enabled || > - vm_event_check_ring(d->vm_event_paging) || > + domain_lock(d); > + > + /* > + * Prevent device assignment if any of > + * - mem paging > + * - mem sharing > + * - the p2m_ram_ro type > + * - global log-dirty mode
XenServer has working live migration with GPUs, which this change would regress. Behind the scenes, we combine Xen's logdirty bitmap with one provided by the GPU, to ensure that all dirty updates are tracked. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
