drm/xe/vf: Don't try to capture engine data unavailable to VF

Don't capture engine ring registers as thoe are not available for
the VF driver.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240213154355.1221-3-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_hw_engine.c

@@ -25,6 +25,7 @@
 #include "xe_reg_sr.h"
 #include "xe_rtp.h"
 #include "xe_sched_job.h"
+#include "xe_sriov.h"
 #include "xe_tuning.h"
 #include "xe_uc_fw.h"
 #include "xe_wa.h"
@@ -767,6 +768,10 @@ xe_hw_engine_snapshot_capture(struct xe_hw_engine *hwe)
 						    hwe->domain);
 	snapshot->mmio_base = hwe->mmio_base;
 
+	/* no more VF accessible data below this point */
+	if (IS_SRIOV_VF(gt_to_xe(hwe->gt)))
+		return snapshot;
+
 	snapshot->reg.ring_execlist_status =
 		hw_engine_mmio_read32(hwe, RING_EXECLIST_STATUS_LO(0));
 	val = hw_engine_mmio_read32(hwe, RING_EXECLIST_STATUS_HI(0));