evl/thread: flesh out state info returned by EVL_THRIOC_GET_STATE

This enables threads running out-of-band to retrieve most of the raw
thread-related state information "evl ps" accesses through /sysfs
attributes.
Signed-off-by: Philippe Gerum <rpm@xenomai.org>

include/uapi/evl/control.h

@@ -10,7 +10,7 @@
 #include <linux/types.h>
 #include <uapi/evl/sched.h>
 
-#define EVL_ABI_LEVEL  8
+#define EVL_ABI_LEVEL  9
 
 #define EVL_CONTROL_DEV  "/dev/evl/control"
 

include/uapi/evl/thread.h

@@ -82,7 +82,12 @@ struct evl_user_window {
 
 struct evl_thread_state {
 	struct evl_sched_attrs eattrs;
-	int cpu;
+	__u32 cpu;
+	__u32 state;
+	__u32 isw;
+	__u32 csw;
+	__u32 sc;
+	__u64 xtime;
 };
 
 #define EVL_THREAD_IOCBASE	'T'

kernel/evl/thread.c

@@ -2017,6 +2017,11 @@ void evl_get_thread_state(struct evl_thread *thread,
 	statebuf->eattrs.sched_priority = thread->cprio;
 	__get_sched_attrs(thread->sched_class, thread, &statebuf->eattrs);
 	statebuf->cpu = evl_rq_cpu(thread->rq);
+	statebuf->state = evl_rq_cpu(thread->rq);
+	statebuf->isw = thread->stat.isw.counter;
+	statebuf->csw = thread->stat.csw.counter;
+	statebuf->sc = thread->stat.sc.counter;
+	statebuf->xtime = ktime_to_ns(thread->stat.account.total);
 	xnlock_put_irqrestore(&nklock, flags);
 }
 EXPORT_SYMBOL_GPL(evl_get_thread_state);