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target-s390x: implement STPT helper

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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.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno 2015-05-18 23:42:29 +02:00 committed by Alexander Graf
parent aa9e14e684
commit b8ae94bd39
1 changed files with 4 additions and 3 deletions
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7
target-s390x/misc_helper.c
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@ -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 */