Hi Stefano,
> The tiny "xen,iommu-el2-v1" driver could be backported to the stable
> trees, I would imagine. Otherwise, do you have another suggestion?
There is stub IOMMU driver already merged to the Linux Kernel:
Commit 1ca55d50e50c74747a7b8846dac306fbe5ac4cf5 ("xen/grant-dma-iommu:
Introduc
On Fri, 4 Feb 2022, Rob Herring wrote:
> On Wed, Jan 26, 2022 at 10:56:39AM -0800, Stefano Stabellini wrote:
> > On Wed, 26 Jan 2022, Robin Murphy wrote:
> > > On 2022-01-26 15:09, Sergiy Kibrik wrote:
> > > > Hi Robin,
> > > >
> > > > >
> > > > > This could break Linux guests, since depending on
On Wed, Jan 26, 2022 at 10:56:39AM -0800, Stefano Stabellini wrote:
> On Wed, 26 Jan 2022, Robin Murphy wrote:
> > On 2022-01-26 15:09, Sergiy Kibrik wrote:
> > > Hi Robin,
> > >
> > > >
> > > > This could break Linux guests, since depending on the deferred probe
> > > > timeout setting it could
On Wed, 26 Jan 2022, Robin Murphy wrote:
> On 2022-01-26 15:09, Sergiy Kibrik wrote:
> > Hi Robin,
> >
> > >
> > > This could break Linux guests, since depending on the deferred probe
> > > timeout setting it could lead to drivers never probing because the "IOMMU"
> > > never becomes available.
>
On 2022-01-26 15:09, Sergiy Kibrik wrote:
Hi Robin,
This could break Linux guests, since depending on the deferred probe
timeout setting it could lead to drivers never probing because the "IOMMU"
never becomes available.
I've noticed no deferred probe timeouts when booting with this patch.
Hi Robin,
>
> This could break Linux guests, since depending on the deferred probe
> timeout setting it could lead to drivers never probing because the "IOMMU"
> never becomes available.
>
I've noticed no deferred probe timeouts when booting with this patch. Could you
please explain more on ho
On Mon, 17 Jan 2022, Robin Murphy wrote:
> On 2022-01-17 12:32, Sergiy Kibrik wrote:
> > In IOMMU-capable system hypervisor usually takes over IOMMU control.
> > Generally guest domains don't need to care about IOMMU management and take
> > any
> > extra actions. Yet in some cases a knowledge about
On 2022-01-17 12:32, Sergiy Kibrik wrote:
In IOMMU-capable system hypervisor usually takes over IOMMU control.
Generally guest domains don't need to care about IOMMU management and take any
extra actions. Yet in some cases a knowledge about which device is protected
may be useful for privileged d
