On Thu, 28 Feb 2019 09:48:39 +0100 Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote: > On 28/02/2019 09:23, Christian Borntraeger wrote: > > On 22.02.2019 16:29, Pierre Morel wrote: > >> To be able to use the VFIO interface to facilitate the > >> mediated device memory pining/unpining we need to register > >> a notifier for IOMMU. > > > > You might want to add that while we start to pin one guest page for the > > interrupt indicator byte in the next patch, this is still ok with ballooning > > as this page will never be used by the guest virtio-balloon driver. So the > > pinned page will never be freed. And even a broken guest does so, that would > > not impact the host as the original page is still in control by vfio. > > > > Thanks, I ll do. > I recall a comment in qemu that says vfio-ap does not pin any pages. That one needs to be fixed up as well. Regards, Halil [..]
