Messages in this thread | | | Date | Sun, 11 Aug 2019 04:55:27 -0400 | From | "Michael S. Tsirkin" <> | Subject | Re: [RFC PATCH] virtio_ring: Use DMA API if guest memory is encrypted |
| |
On Sun, Aug 11, 2019 at 07:56:07AM +0200, Christoph Hellwig wrote: > So we need a flag on the virtio device, exposed by the > hypervisor (or hardware for hw virtio devices) that says: hey, I'm real, > don't take a shortcut.
The point here is that it's actually still not real. So we would still use a physical address. However Linux decides that it wants extra security by moving all data through the bounce buffer. The distinction made is that one can actually give device a physical address of the bounce buffer.
-- MST
| |