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memory: Add IOMMU_NOTIFIER_DEVIOTLB_UNMAP IOMMUTLBNotificationType

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This allows us to differentiate between regular IOMMU map/unmap events
and DEVIOTLB unmap. Doing so, notifiers that only need device IOTLB
invalidations will not receive regular IOMMU unmappings.

Adapt intel and vhost to use it.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20201116165506.31315-4-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eugenio Pérez 2020-11-16 17:55:04 +01:00 • committed by Michael S. Tsirkin
parent 5039caf3c4
commit b68ba1ca57
3 changed files with 8 additions and 3 deletions
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2
hw/virtio/vhost.c
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@ -718,7 +718,7 @@ static void vhost_iommu_region_add(MemoryListener *listener,
iommu_idx = memory_region_iommu_attrs_to_index(iommu_mr,
MEMTXATTRS_UNSPECIFIED);
iommu_notifier_init(&iommu->n, vhost_iommu_unmap_notify,
IOMMU_NOTIFIER_UNMAP,
IOMMU_NOTIFIER_DEVIOTLB_UNMAP,
section->offset_within_region,
int128_get64(end),
iommu_idx);