With CONFIG_XEN_VIRTIO_FORCE_GRANT set the default backend domid to 0,
enabling to use xen_grant_dma_ops for those devices.
Signed-off-by: Juergen Gross <[email protected]>
Reviewed-by: Oleksandr Tyshchenko <[email protected]>
Acked-by: Stefano Stabellini <[email protected]>
---
drivers/xen/grant-dma-ops.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/xen/grant-dma-ops.c b/drivers/xen/grant-dma-ops.c
index 646ca913c05c..c703b77b33c9 100644
--- a/drivers/xen/grant-dma-ops.c
+++ b/drivers/xen/grant-dma-ops.c
@@ -349,6 +349,9 @@ void xen_grant_setup_dma_ops(struct device *dev)
if (dev->of_node) {
if (xen_dt_grant_init_backend_domid(dev, data))
goto err;
+ } else if (IS_ENABLED(CONFIG_XEN_VIRTIO_FORCE_GRANT)) {
+ dev_info(dev, "Using dom0 as backend\n");
+ data->backend_domid = 0;
} else {
/* XXX ACPI device unsupported for now */
goto err;
--
2.35.3