Messages in this thread | | | Date | Mon, 7 Dec 2020 14:48:38 +0000 | From | Stefan Hajnoczi <> | Subject | Re: [PATCH] vfio iommu type1: Bypass the vma permission check in vfio_pin_pages_remote() |
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On Thu, Dec 03, 2020 at 05:01:32PM +0100, David Hildenbrand wrote: > The real question is: do we even *need* DMA from vfio devices to > virtio-fs regions? If not (do guests rely on it? what does the spec > state?), just don't care about vfio at all and don't map anything.
Can DMA to/from the virtio-fs DAX Window happen? Yes, the guest could do it although it's rare.
Is it a great idea to combine VFIO and virtio-fs DAX? Maybe not. It involves pinning host page cache pages O_o.
Stefan [unhandled content-type:application/pgp-signature] | |