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>
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@ -810,6 +810,11 @@ static int vhost_dev_set_features(struct vhost_dev *dev,
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if (!vhost_dev_has_iommu(dev)) {
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if (!vhost_dev_has_iommu(dev)) {
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features &= ~(0x1ULL << VIRTIO_F_IOMMU_PLATFORM);
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features &= ~(0x1ULL << VIRTIO_F_IOMMU_PLATFORM);
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}
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}
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if (dev->vhost_ops->vhost_force_iommu) {
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if (dev->vhost_ops->vhost_force_iommu(dev) == true) {
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features |= 0x1ULL << VIRTIO_F_IOMMU_PLATFORM;
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}
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}
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r = dev->vhost_ops->vhost_set_features(dev, features);
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r = dev->vhost_ops->vhost_set_features(dev, features);
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if (r < 0) {
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if (r < 0) {
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VHOST_OPS_DEBUG("vhost_set_features failed");
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VHOST_OPS_DEBUG("vhost_set_features failed");
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