accel/amdxdna: Block running when IOMMU is off

The AIE2 device firmware requires IOMMU on.

Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5319
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260520223531.1403302-1-lizhi.hou@amd.com

drivers/accel/amdxdna/aie2_pci.c

@@ -511,6 +511,11 @@ static int aie2_init(struct amdxdna_dev *xdna)
 		return -EINVAL;
 	}
 
+	if (!xdna->group) {
+		XDNA_ERR(xdna, "Running without IOMMU not supported");
+		return -EINVAL;
+	}
+
 	ndev = drmm_kzalloc(&xdna->ddev, sizeof(*ndev), GFP_KERNEL);
 	if (!ndev)
 		return -ENOMEM;