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| author | Eric Auger <eric.auger@redhat.com> | 2021-02-09 22:32:32 +0100 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2021-03-16 10:06:44 -0600 |
| commit | 8dca037b484fc8caeb6d6689745bc7475ce27174 (patch) | |
| tree | 570bf5cff86ded366bb90f73b21131021ee87125 | |
| parent | 4e779bf1a55e8b951f1640e3ea46fc459066f64f (diff) | |
| download | qemu-8dca037b484fc8caeb6d6689745bc7475ce27174.zip qemu-8dca037b484fc8caeb6d6689745bc7475ce27174.tar.gz qemu-8dca037b484fc8caeb6d6689745bc7475ce27174.tar.bz2 | |
vfio: Do not register any IOMMU_NOTIFIER_DEVIOTLB_UNMAP notifier
In an attempt to fix smmu/virtio-iommu - vhost regression, commit
958ec334bca3 ("vhost: Unbreak SMMU and virtio-iommu on dev-iotlb support")
broke virtio-iommu integration. This is due to the fact VFIO registers
IOMMU_NOTIFIER_ALL notifiers, which includes IOMMU_NOTIFIER_DEVIOTLB_UNMAP
and this latter now is rejected by the virtio-iommu. As a consequence,
the registration fails. VHOST behaves like a device with an ATC cache. The
VFIO device does not support this scheme yet.
Let's register only legacy MAP and UNMAP notifiers.
Fixes: 958ec334bca3 ("vhost: Unbreak SMMU and virtio-iommu on dev-iotlb support")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210209213233.40985-2-eric.auger@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| -rw-r--r-- | hw/vfio/common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/vfio/common.c b/hw/vfio/common.c index d360d6f..35a41fd 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -787,7 +787,7 @@ static void vfio_listener_region_add(MemoryListener *listener, iommu_idx = memory_region_iommu_attrs_to_index(iommu_mr, MEMTXATTRS_UNSPECIFIED); iommu_notifier_init(&giommu->n, vfio_iommu_map_notify, - IOMMU_NOTIFIER_ALL, + IOMMU_NOTIFIER_IOTLB_EVENTS, section->offset_within_region, int128_get64(llend), iommu_idx); |