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Date:   Mon, 29 Mar 2021 18:23:02 +0200
From:   Jean-Philippe Brucker <jean-philippe@linaro.org>
To:     Vivek Kumar Gautam <vivek.gautam@arm.com>
Cc:     linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        iommu@lists.linux-foundation.org,
        virtualization@lists.linux-foundation.org, joro@8bytes.org,
        will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com,
        eric.auger@redhat.com, alex.williamson@redhat.com,
        kevin.tian@intel.com, jacob.jun.pan@linux.intel.com,
        yi.l.liu@intel.com, lorenzo.pieralisi@arm.com,
        shameerali.kolothum.thodi@huawei.com
Subject: Re: [PATCH RFC v1 15/15] iommu/virtio: Update fault type and reason
 info for viommu fault
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References: <20210115121342.15093-1-vivek.gautam@arm.com>
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On Fri, Mar 12, 2021 at 06:39:05PM +0530, Vivek Kumar Gautam wrote:
> To complete the page request we would also need to send the response back to
> the host from virtio backend when handling page request. So the virtio
> command should also be accompanied with a vfio api to send the page request
> response back to the host. Isn't it?
> This is where the host smmuv3 can send PRI_RESP command to the device to
> complete the page fault.

It looks like Eric already has this in the VFIO series:
https://lore.kernel.org/linux-iommu/20210223210625.604517-14-eric.auger@redhat.com/

Thanks,
Jean