On Mon, Jun 02, 2025 at 10:30:09AM -0300, Jason Gunthorpe wrote: > On Thu, May 29, 2025 at 01:34:53PM +0800, Xu Yilun wrote: > > Export vfio dma-buf specific info by attaching vfio_dma_buf_data in > > struct dma_buf::priv. Provide a helper vfio_dma_buf_get_data() for > > importers to fetch these data. Exporters identify VFIO dma-buf by > > successfully getting these data. > > > > VFIO dma-buf supports disabling host access to these exported MMIO > > regions when the device is converted to private. Exporters like KVM > > need to identify this type of dma-buf to decide if it is good to use. > > KVM only allows host unaccessible MMIO regions been mapped in private > > roots. > > > > Export struct kvm * handler attached to the vfio device. This > > allows KVM to do another sanity check. MMIO should only be assigned to > > a CoCo VM if its owner device is already assigned to the same VM. > > This doesn't seem right, it should be encapsulated into the standard > DMABUF API in some way. OK. > > Jason
