Re: [Qemu-devel] [RFC v4 00/16] VIRTIO-IOMMU device

[Auger Eric]

Hi Peter,

On 11/10/2017 16:56, Peter Maydell wrote:
> On 19 September 2017 at 08:46, Eric Auger <address@hidden> wrote:
>> This series implements the virtio-iommu device.
>>
>> This v4 is an upgrade to v0.4 spec [1] and applies on QEMU v2.10.0.
>> - probe request support although no reserved region is returned at
>>   the moment
>> - unmap semantics less strict, as specified in v0.4
>> - device registration, attach/detach revisited
>> - split into smaller patches to ease review
>> - propose a way to inform the IOMMU mr about the page_size_mask
>>   of underlying HW IOMMU, if any
>> - remove warning associated with the translation of the MSI doorbell
>>
>> The device gets instantiated using the "-device virtio-iommu-device"
>> option. It currently works with ARM virt machine only, as the machine
>> must handle the dt binding between the virtio-mmio "iommu" node and
>> the PCI host bridge node.
> 
> Could this work on x86, or is it inherently arm-only?

Yes this is the goal. At the moment the ACPI probing is not yet properly
specified but a Q35 prototype was developed in the Red Hat Virt team.
This will be presented at the KVM forum.

Thanks

Eric
> 
> thanks
> -- PMM
>