[lkml]   [2019]   [Aug]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [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.


 \ /
  Last update: 2019-08-11 10:56    [W:0.141 / U:6.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site