1 files changed, 39 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 044c023875e8..80235bcd05f2 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -283,6 +283,18 @@ struct vtime {
         u64                     gtime;
 };
 
+/*
+ * Utilization clamp constraints.
+ * @UCLAMP_MIN: Minimum utilization
+ * @UCLAMP_MAX: Maximum utilization
+ * @UCLAMP_CNT: Utilization clamp constraints count
+ */
+enum uclamp_id {
+        UCLAMP_MIN = 0,
+        UCLAMP_MAX,
+        UCLAMP_CNT
+};
+
 struct sched_info {
 #ifdef CONFIG_SCHED_INFO
         /* Cumulative counters: */
@@ -314,6 +326,10 @@ struct sched_info {
 # define SCHED_FIXEDPOINT_SHIFT         10
 # define SCHED_FIXEDPOINT_SCALE         (1L << SCHED_FIXEDPOINT_SHIFT)
 
+/* Increase resolution of cpu_capacity calculations */
+# define SCHED_CAPACITY_SHIFT           SCHED_FIXEDPOINT_SHIFT
+# define SCHED_CAPACITY_SCALE           (1L << SCHED_CAPACITY_SHIFT)
+
 struct load_weight {
         unsigned long                   weight;
         u32                             inv_weight;
@@ -562,6 +578,25 @@ struct sched_dl_entity {
         struct hrtimer inactive_timer;
 };
 
+#ifdef CONFIG_UCLAMP_TASK
+/* Number of utilization clamp buckets (shorter alias) */
+#define UCLAMP_BUCKETS CONFIG_UCLAMP_BUCKETS_COUNT
+
+/*
+ * Utilization clamp for a scheduling entity
+ * @value:              clamp value "assigned" to a se
+ * @bucket_id:          bucket index corresponding to the "assigned" value
+ *
+ * The bucket_id is the index of the clamp bucket matching the clamp value
+ * which is pre-computed and stored to avoid expensive integer divisions from
+ * the fast path.
+ */
+struct uclamp_se {
+        unsigned int value              : bits_per(SCHED_CAPACITY_SCALE);
+        unsigned int bucket_id          : bits_per(UCLAMP_BUCKETS);
+};
+#endif /* CONFIG_UCLAMP_TASK */
+
 union rcu_special {
         struct {
                 u8                      blocked;
@@ -642,6 +677,10 @@ struct task_struct {
 #endif
         struct sched_dl_entity          dl;
 
+#ifdef CONFIG_UCLAMP_TASK
+        struct uclamp_se                uclamp[UCLAMP_CNT];
+#endif
+
 #ifdef CONFIG_PREEMPT_NOTIFIERS
         /* List of struct preempt_notifier: */
         struct hlist_head               preempt_notifiers;