Initial syscall implementation

kernel/sched/pb.c

@@ -11,6 +11,43 @@ struct pb_plan {
 };
 typedef struct pb_plan pb_plan_t;
 
+typedef struct pb_plan_info pb_plan_info_t;
+
+SYSCALL_DEFINE1(pb_set_plan_debug, pb_plan_info_t*, plan_info) {
+	pb_plan_info_t _plan_info;
+	int res;
+	res = copy_from_user(&_plan_info, plan_info, sizeof(pb_plan_info_t));
+	
+	struct task_struct* task = find_task_by_vpid(_plan_info.pid);
+
+	task->sched_class = &pb_sched_class;
+
+	struct rq* rq;
+	rq = this_rq();
+
+	struct pb_rq *pb_rq = &rq->pb;
+
+	set_pb_plan_size(pb_rq, _plan_info.num_tasks);
+
+	unsigned int i;
+	for(i = 0; i < _plan_info.num_tasks; i++ ) {
+		set_pb_plan_entry(
+			pb_rq,
+			i,
+			_plan_info.inst_cnt[i],
+			i,
+			task
+		);
+	}
+
+	pb_submit_plan(rq);
+
+	// TODO:
+	// - perf_event stuff
+	// - ... 
+	return 0;
+}
+
 SYSCALL_DEFINE1(pb_set_plan, pb_plan_t*, plan) {
 	pb_plan_t _plan = {0};
 	int res;
@@ -24,6 +61,7 @@ SYSCALL_DEFINE1(pb_set_plan, pb_plan_t*, plan) {
  */
 int pb_submit_plan(struct rq *rq)
 {
+	find_task_by_vpid(20);
 	/*
 	 * Must be volatile to ensure correct initialization order
 	 */

kernel/sched/sched.h

@@ -540,6 +540,12 @@ struct pb_init_struct
 	u64 n_admin_cycles; // amount of timer ticks before PB tasks are allowed to run
 };
 
+struct pb_plan_info {
+ 	    pid_t pid;
+        uint64_t *inst_cnt;
+        size_t num_tasks;
+};
+
 struct pb_rq
 {
 	struct plan_entry *plan; // plan (used to be proxy_task)
@@ -891,6 +897,8 @@ static inline int cpu_of(struct rq *rq)
 #endif
 }
 
+struct task_struct *find_task_by_vpid(pid_t vnr);
+
 // used to determine the next mode of the PB-Scheduler
 // This function is located in sched.h since pb.c and fair.c are using this function
 static inline int determine_next_mode_pb(struct rq *rq)