[PATCH] virtio-gpu: disable VIRGL with BE kernel

From: Laurent Vivier
Date: Tue Jan 24 2017 - 08:19:30 EST

VIRTIO_GPU_F_VIRGL is added in features list only
for LE kernel, so we must check for it only on LE kernel,
otherwise virtio_has_feature() calls BUG() and
crashes the kernel.

Suggested-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Signed-off-by: Laurent Vivier <lvivier@xxxxxxxxxx>
Note: this patch has been actually written by Gerd,
but to post it I don't know if "Suggested-by" is enough
or if I should change the "author" field.

drivers/gpu/drm/virtio/virtgpu_kms.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 1235519..87915d5 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -166,10 +166,14 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)

if (virtio_has_feature(vgdev->vdev, VIRTIO_GPU_F_VIRGL))
vgdev->has_virgl_3d = true;
DRM_INFO("virgl 3d acceleration %s\n",
- vgdev->has_virgl_3d ? "enabled" : "not available");
+ vgdev->has_virgl_3d ? "enabled" : "not supported by host");
+ DRM_INFO("virgl 3d acceleration not supported by guest\n");

ret = vgdev->vdev->config->find_vqs(vgdev->vdev, 2, vqs,
callbacks, names);