[PATCH v4 18/26] vhost: add VDUSE callback for IOTLB entry removal

[Maxime Coquelin]

This patch implements the VDUSE callback for IOTLB entry
removal, where it unmaps the pages from the invalidated
IOTLB entry.

Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia at intel.com>
---
 lib/vhost/vduse.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/vhost/vduse.c b/lib/vhost/vduse.c
index f72c7bf6ab..58c1b384a8 100644
--- a/lib/vhost/vduse.c
+++ b/lib/vhost/vduse.c
@@ -42,6 +42,12 @@
 				(1ULL << VIRTIO_F_IN_ORDER) | \
 				(1ULL << VIRTIO_F_IOMMU_PLATFORM))
 
+static void
+vduse_iotlb_remove_notify(uint64_t addr, uint64_t offset, uint64_t size)
+{
+	munmap((void *)(uintptr_t)addr, offset + size);
+}
+
 static int
 vduse_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm __rte_unused)
 {
@@ -99,6 +105,7 @@ vduse_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm __rte_unuse
 
 static struct vhost_backend_ops vduse_backend_ops = {
 	.iotlb_miss = vduse_iotlb_miss,
+	.iotlb_remove_notify = vduse_iotlb_remove_notify,
 };
 
 int
-- 
2.40.1