spapr_iommu: Fix vhost integration regression
commit1a8e22bd20c2586df0bc0fdce8d5a3b42fffb1ac
authorEric Auger <eric.auger@redhat.com>
Tue, 9 Feb 2021 21:32:33 +0000 (9 22:32 +0100)
committerAlex Williamson <alex.williamson@redhat.com>
Tue, 16 Mar 2021 16:06:44 +0000 (16 10:06 -0600)
treedb13294efca3e754cef5da79b1501faab303cfce
parent8dca037b484fc8caeb6d6689745bc7475ce27174
spapr_iommu: Fix vhost integration regression

Previous work on dev-iotlb message broke spapr_iommu/vhost integration
as it did for SMMU and virtio-iommu. The spapr_iommu currently
only sends IOMMU_NOTIFIER_UNMAP notifications. Since commit
958ec334bca3 ("vhost: Unbreak SMMU and virtio-iommu on dev-iotlb support"),
VHOST first tries to register IOMMU_NOTIFIER_DEVIOTLB_UNMAP notifier
and if it fails, falls back to legacy IOMMU_NOTIFIER_UNMAP. So
spapr_iommu must fail on the IOMMU_NOTIFIER_DEVIOTLB_UNMAP
registration.

Reported-by: Peter Xu <peterx@redhat.com>
Fixes: b68ba1ca5767 ("memory: Add IOMMU_NOTIFIER_DEVIOTLB_UNMAP IOMMUTLBNotificationType")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210209213233.40985-3-eric.auger@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
hw/ppc/spapr_iommu.c