Re: [Qemu-devel] [PATCH v4 0/5] ARM SMMUv3: Fix spurious notification errors and fail with VFIO

[Peter Maydell <peter.maydell@linaro.org>]

On Thu, 22 Aug 2019 at 18:24, Eric Auger <eric.auger@redhat.com> wrote:
>
> As of today when a guest is assigned with a host PCI device and
> an SMMUv3, VFIO calls memory_region_iommu_replay() default
> implementation. This translates the whole address range and
> completely stalls the execution. As VFIO/SMMUv3 integration
> is not supported yet (it requires SMMUv3 HW nested paging), let's
> recognize this situation and fail.
>
> Also the series silences some spurious translation configuration
> decoding errors (STE out of span or invalid STE) that may happen
> on guest IOVA invalidation notifications.
>
> Best Regards
>
> Eric
>
> This series can be found at:
> https://github.com/eauger/qemu/tree/v4.1.0_smmu_vfio_fail_v4

> Eric Auger (5):
>   memory: Remove unused memory_region_iommu_replay_all()
>   memory: Add IOMMU_ATTR_HW_NESTED_PAGING IOMMU memory region attribute
>   hw/vfio/common: Fail on VFIO/HW nested paging detection
>   hw/arm/smmuv3: Log a guest error when decoding an invalid STE
>   hw/arm/smmuv3: Remove spurious error messages on IOVA invalidations

I've added patches 1, 4 and 5 to target-arm.next.

thanks
-- PMM