vdpa: set dma mask for vDPA device

Setting DMA mask for vDPA device in case that there are virtqueue that is not backed by DMA so the vDPA device could be advertised as the DMA device that is used by DMA API for software emulated virtqueues. Reviewed-by: Eli Cohen <[email protected]> Tested-by: Eli Cohen <[email protected]> Signed-off-by: Jason Wang <[email protected]> Message-Id: <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
SELinuxProject · Feb 21, 2023 · 99fb2b8 · 99fb2b8
1 parent a1baedb
commit 99fb2b8
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
@@ -39,6 +39,11 @@ static int vdpa_dev_probe(struct device *d)
 	u32 max_num, min_num = 1;
 	int ret = 0;
 
+	d->dma_mask = &d->coherent_dma_mask;
+	ret = dma_set_mask_and_coherent(d, DMA_BIT_MASK(64));
+	if (ret)
+		return ret;
+
 	max_num = ops->get_vq_num_max(vdev);
 	if (ops->get_vq_num_min)
 		min_num = ops->get_vq_num_min(vdev);