[PATCH 1/1] drm/xe: enable lite restore

[fei.yang at intel.com]

From: Fei Yang <fei.yang at intel.com>

The lite restore is a performance improvement feature which avoids
unnecessary full context save and restore if the task been switched
in is the same as the one been switched out. This is supposed to be
enabled by default.

Signed-off-by: Fei Yang <fei.yang at intel.com>
Cc: John Harrison <John.C.Harrison at Intel.com>
---
 drivers/gpu/drm/xe/xe_guc.c      | 2 +-
 drivers/gpu/drm/xe/xe_guc_fwif.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 8570b1218287..fed30f2872f7 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -70,7 +70,7 @@ static u32 guc_ctl_debug_flags(struct xe_guc *guc)
 
 static u32 guc_ctl_feature_flags(struct xe_guc *guc)
 {
-	u32 flags = 0;
+	u32 flags = GUC_CTL_ENABLE_LITE_RESTORE;
 
 	if (!guc_to_xe(guc)->info.skip_guc_pc)
 		flags |= GUC_CTL_ENABLE_SLPC;
diff --git a/drivers/gpu/drm/xe/xe_guc_fwif.h b/drivers/gpu/drm/xe/xe_guc_fwif.h
index 01e3ab590c3a..08ffe59f22fa 100644
--- a/drivers/gpu/drm/xe/xe_guc_fwif.h
+++ b/drivers/gpu/drm/xe/xe_guc_fwif.h
@@ -105,6 +105,7 @@ struct guc_update_exec_queue_policy {
 
 #define GUC_CTL_FEATURE			2
 #define   GUC_CTL_ENABLE_SLPC		BIT(2)
+#define   GUC_CTL_ENABLE_LITE_RESTORE	BIT(4)
 #define   GUC_CTL_DISABLE_SCHEDULER	BIT(14)
 
 #define GUC_CTL_DEBUG			3
-- 
2.25.1