haraldwolff/qemu-patch-raspberry4
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APIC: Do not start zero-period timers (Jan Kiszka)

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The APIC timer must not start when the initial count is (still) zero.

This caused occasional stalls when booting secondary CPUs of Linux SMP
guests.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5024 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-08-18 14:19:42 +00:00
parent c8f79b67cf
commit 681f8c29aa
1 changed files with 2 additions and 0 deletions
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2
hw/apic.c
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@ -566,6 +566,8 @@ static void apic_timer_update(APICState *s, int64_t current_time)
d = (current_time - s->initial_count_load_time) >>
s->count_shift;
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
if (!s->initial_count)
goto no_timer;
d = ((d / ((uint64_t)s->initial_count + 1)) + 1) * ((uint64_t)s->initial_count + 1);
} else {
if (d >= s->initial_count)