Re: [PATCH v7 0/5] VIRTIO-IOMMU probe request support and MSI bypass on ARM

[Peter Maydell]

On Mon, 29 Jun 2020 at 08:04, Eric Auger <eric.auger@redhat.com> wrote:
>
> By default the virtio-iommu translates MSI transactions. This
> behavior is inherited from ARM SMMU. However the virt machine
> code knows where the MSI doorbells are, so we can easily
> declare those regions as VIRTIO_IOMMU_RESV_MEM_T_MSI. With that
> setting the guest iommu subsystem will not need to map MSIs.
> This setup will simplify the VFIO integration.
>
> In this series, the ITS or GICV2M doorbells are declared as
> HW MSI regions to be bypassed by the VIRTIO-IOMMU.
>
> This also paves the way to the x86 integration where the MSI
> region, [0xFEE00000,0xFEEFFFFF], will be exposed by the q35
> machine.  However this will be handled in a separate series
> when not-DT support gets resolved.
>
> Best Regards
>
> Eric



Applied to target-arm.next, thanks.

-- PMM