On Fri, 11 Sep 2020 12:04:42 +1000
David Gibson wrote:
> On Mon, Sep 07, 2020 at 05:10:46PM +0200, Halil Pasic wrote:
> > On Fri, 24 Jul 2020 12:57:43 +1000
> > David Gibson wrote:
> >
> > > The default behaviour for virtio devices is not to use the platforms
> > > normal
> > > DMA paths, but
On Mon, Sep 07, 2020 at 05:10:46PM +0200, Halil Pasic wrote:
> On Fri, 24 Jul 2020 12:57:43 +1000
> David Gibson wrote:
>
> > The default behaviour for virtio devices is not to use the platforms normal
> > DMA paths, but instead to use the fact that it's running in a hypervisor
> > to directly ac
On Fri, 24 Jul 2020 12:57:43 +1000
David Gibson wrote:
> The default behaviour for virtio devices is not to use the platforms normal
> DMA paths, but instead to use the fact that it's running in a hypervisor
> to directly access guest memory. That doesn't work if the guest's memory
> is protecte
On Thu, 13 Aug 2020 09:43:56 +0200
Greg Kurz wrote:
> On Mon, 27 Jul 2020 16:05:14 +0100
> "Dr. David Alan Gilbert" wrote:
>
> > * David Gibson (da...@gibson.dropbear.id.au) wrote:
> > > The default behaviour for virtio devices is not to use the platforms
> > > normal
> > > DMA paths, but inst
On Mon, 27 Jul 2020 16:05:14 +0100
"Dr. David Alan Gilbert" wrote:
> * David Gibson (da...@gibson.dropbear.id.au) wrote:
> > The default behaviour for virtio devices is not to use the platforms normal
> > DMA paths, but instead to use the fact that it's running in a hypervisor
> > to directly acc
* David Gibson (da...@gibson.dropbear.id.au) wrote:
> The default behaviour for virtio devices is not to use the platforms normal
> DMA paths, but instead to use the fact that it's running in a hypervisor
> to directly access guest memory. That doesn't work if the guest's memory
> is protected fro
The default behaviour for virtio devices is not to use the platforms normal
DMA paths, but instead to use the fact that it's running in a hypervisor
to directly access guest memory. That doesn't work if the guest's memory
is protected from hypervisor access, such as with AMD's SEV or POWER's PEF.