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vhost: implement vhost_force_iommu method 

use the vhost_force_iommu callback to force enable feature bit VIRTIO_F_IOMMU_PLATFORM

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20200701145538.22333-12-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Cindy Lu 2020-07-01 22:55:35 +08:00 committed by Michael S. Tsirkin
parent f6c99c3438
commit 7a471694a1
1 changed files with 5 additions and 0 deletions
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5
hw/virtio/vhost.c
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@ -810,6 +810,11 @@ static int vhost_dev_set_features(struct vhost_dev *dev,
if (!vhost_dev_has_iommu(dev)) {
features &= ~(0x1ULL << VIRTIO_F_IOMMU_PLATFORM);
}
if (dev->vhost_ops->vhost_force_iommu) {
if (dev->vhost_ops->vhost_force_iommu(dev) == true) {
features |= 0x1ULL << VIRTIO_F_IOMMU_PLATFORM;
}
}
r = dev->vhost_ops->vhost_set_features(dev, features);
if (r < 0) {
VHOST_OPS_DEBUG("vhost_set_features failed");