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Re: [Qemu-devel] [RFC v4 00/16] VIRTIO-IOMMU device
From: |
Auger Eric |
Subject: |
Re: [Qemu-devel] [RFC v4 00/16] VIRTIO-IOMMU device |
Date: |
Wed, 11 Oct 2017 18:08:58 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
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
>