[PATCH v4 3/4] drm/xe/vf: Disallow setting wedged_mode=2

[Lukasz Laguna]

In wedged_mode=2, engine resets need to be disabled, which requires
changing the GuC reset policy. VFs are not permitted to do that.

Signed-off-by: Lukasz Laguna <lukasz.laguna at intel.com>
---
 drivers/gpu/drm/xe/xe_device.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index a8470221ff85..7dfc39dd4c9c 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -1189,6 +1189,10 @@ int xe_device_validate_wedged_mode(struct xe_device *xe, unsigned int mode)
 	if (mode > XE_WEDGED_MODE_UPON_ANY_HANG) {
 		drm_dbg(&xe->drm, "wedged_mode: invalid value (%u)\n", mode);
 		return -EINVAL;
+	} else if (mode == XE_WEDGED_MODE_UPON_ANY_HANG && IS_SRIOV_VF(xe)) {
+		drm_dbg(&xe->drm, "wedged_mode: unsupported mode (%u) for %s\n", mode,
+			xe_sriov_mode_to_string(xe_device_sriov_mode(xe)));
+		return -EPERM;
 	}
 
 	return 0;
-- 
2.40.0