diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/s390x/misc_helper.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c index 7656a9b90a..3f91579570 100644 --- a/target/s390x/misc_helper.c +++ b/target/s390x/misc_helper.c @@ -149,26 +149,23 @@ uint64_t HELPER(stck)(CPUS390XState *env) return tod.low; } -/* Set Clock Comparator */ -void HELPER(sckc)(CPUS390XState *env, uint64_t time) +static void update_ckc_timer(CPUS390XState *env) { S390TODState *td = s390_get_todstate(); + uint64_t time; /* stop the timer and remove pending CKC IRQs */ timer_del(env->tod_timer); - qemu_mutex_lock_iothread(); + g_assert(qemu_mutex_iothread_locked()); env->pending_int &= ~INTERRUPT_EXT_CLOCK_COMPARATOR; - qemu_mutex_unlock_iothread(); /* the tod has to exceed the ckc, this can never happen if ckc is all 1's */ - if (time == -1ULL) { + if (env->ckc == -1ULL) { return; } - env->ckc = time; - /* difference between origins */ - time -= td->base.low; + time = env->ckc - td->base.low; /* nanoseconds */ time = tod2time(time); @@ -176,12 +173,21 @@ void HELPER(sckc)(CPUS390XState *env, uint64_t time) timer_mod(env->tod_timer, time); } +/* Set Clock Comparator */ +void HELPER(sckc)(CPUS390XState *env, uint64_t ckc) +{ + env->ckc = ckc; + + qemu_mutex_lock_iothread(); + update_ckc_timer(env); + qemu_mutex_unlock_iothread(); +} + void tcg_s390_tod_updated(CPUState *cs, run_on_cpu_data opaque) { S390CPU *cpu = S390_CPU(cs); - CPUS390XState *env = &cpu->env; - helper_sckc(env, env->ckc); + update_ckc_timer(&cpu->env); } /* Set Clock */ |