[Qemu-devel] [PATCH 5/5] target-s390x: implement STPT helper

[Aurelien Jarno]

Save the timer target value in the SPT helper, so that the STPT helper
can compute the remaining time.

This allow the Linux kernel to correctly do time accounting.

Cc: Alexander Graf <address@hidden>
Cc: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
 target-s390x/misc_helper.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
index 57aee95..3ec7268 100644
--- a/target-s390x/misc_helper.c
+++ b/target-s390x/misc_helper.c
@@ -313,14 +313,15 @@ void HELPER(spt)(CPUS390XState *env, uint64_t time)
     /* nanoseconds */
     time = tod2time(time);
 
-    timer_mod(env->cpu_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time);
+    env->cputm = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time;
+
+    timer_mod(env->cpu_timer, env->cputm);
 }
 
 /* Store CPU Timer */
 uint64_t HELPER(stpt)(CPUS390XState *env)
 {
-    /* XXX implement */
-    return 0;
+    return time2tod(env->cputm - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
 }
 
 /* Store System Information */
-- 
2.1.4