The event queue offers a way for the device to report access faults from
endpoints. It is implemented on virtqueue #1. Whenever the host needs to
signal a fault, it fills one of the buffers offered by the guest and
interrupts it.
Reviewed-by: Eric Auger
Signed-off-by: Jean-Philippe Brucker
---
In PCI root complex nodes, the iommu-map property describes the IOMMU that
translates each endpoint. On some platforms, the IOMMU itself is presented
as a PCI endpoint (e.g. AMD IOMMU and virtio-iommu). This isn't supported
by the current OF driver, which expects all endpoints to have an IOMMU.
All
The virtio IOMMU is a para-virtualized device, allowing to send IOMMU
requests such as map/unmap over virtio transport without emulating page
tables. This implementation handles ATTACH, DETACH, MAP and UNMAP
requests.
The bulk of the code transforms calls coming from the IOMMU API into
correspondi
Implement the virtio-iommu driver, following specification v0.9 [1].
Since v4 [2] I fixed the issues reported by Eric, and added Reviewed-by
from Eric and Rob. Thanks!
I changed the specification to fix one inconsistency discussed in v4.
That the device fills the probe buffer with zeroes is now a
When the device offers the probe feature, send a probe request for each
device managed by the IOMMU. Extract RESV_MEM information. When we
encounter a MSI doorbell region, set it up as a IOMMU_RESV_MSI region.
This will tell other subsystems that there is no need to map the MSI
doorbell in the virt
The nature of a virtio-mmio node is discovered by the virtio driver at
probe time. However the DMA relation between devices must be described
statically. When a virtio-mmio node is a virtio-iommu device, it needs an
"#iommu-cells" property as specified by bindings/iommu/iommu.txt.
Otherwise, the v
For PCI devices that have an OF node, set the fwnode as well. This way
drivers that rely on fwnode don't need the special case described by
commit f94277af03ea ("of/platform: Initialise dev->fwnode appropriately").
Acked-by: Bjorn Helgaas
Signed-off-by: Jean-Philippe Brucker
---
drivers/pci/of.
Some systems implement virtio-iommu as a PCI endpoint. The operating
system needs to discover the relationship between IOMMU and masters long
before the PCI endpoint gets probed. Add a PCI child node to describe the
virtio-iommu device.
The virtio-pci-iommu is conceptually split between a PCI prog
On Wed, Nov 21, 2018 at 10:04:53PM +0200, Sameeh Jubran wrote:
> On Wed, Nov 21, 2018 at 8:41 PM Michael S. Tsirkin wrote:
> >
> > Great to see you making progress on this!
> > Some comments below:
> >
> > On Wed, Nov 21, 2018 at 05:39:38PM +0200, Sameeh Jubran wrote:
> > > I have created a setup
On Thu, Nov 22, 2018 at 1:51 AM Samudrala, Sridhar
wrote:
>
> On 11/21/2018 12:04 PM, Sameeh Jubran wrote:
> > On Wed, Nov 21, 2018 at 8:41 PM Michael S. Tsirkin wrote:
> >> Great to see you making progress on this!
> >> Some comments below:
> >>
> >> On Wed, Nov 21, 2018 at 05:39:38PM +0200, Sam
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