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apic: Report current_count via 'info lapic'

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This is helpful when debugging stuck guest timers.

As we need apic_get_current_count for that, and it is really not
emulation specific, move it to apic_common.c and export it. Fix its
style at this chance as well.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <e00e2896-ca5b-a929-de7a-8e5762f0c1c2@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jan Kiszka 2020-02-07 07:43:42 +01:00 • committed by Paolo Bonzini
parent 86f13ef318
commit 6e083c0de4
4 changed files with 23 additions and 20 deletions
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19
hw/intc/apic_common.c
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@ -189,6 +189,25 @@ bool apic_next_timer(APICCommonState *s, int64_t current_time)
return true;
}
uint32_t apic_get_current_count(APICCommonState *s)
{
int64_t d;
uint32_t val;
d = (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - s->initial_count_load_time) >>
s->count_shift;
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
/* periodic */
val = s->initial_count - (d % ((uint64_t)s->initial_count + 1));
} else {
if (d >= s->initial_count) {
val = 0;
} else {
val = s->initial_count - d;
}
}
return val;
}
void apic_init_reset(DeviceState *dev)
{
APICCommonState *s;