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| author | Avi Kivity <avi@qumranet.com> | 2008-02-24 14:37:50 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-03-04 15:19:48 +0200 |
| commit | 0b975a3c2d53829fa978e18fabae7d99031f588f (patch) | |
| tree | 6423319b2f1e6437cae279bce0aad9d348e055d9 /arch/x86 | |
| parent | 24993d53495d1f9b844f8eb3ebd1b9efd3521617 (diff) | |
| download | linux-0b975a3c2d53829fa978e18fabae7d99031f588f.tar.gz linux-0b975a3c2d53829fa978e18fabae7d99031f588f.tar.bz2 linux-0b975a3c2d53829fa978e18fabae7d99031f588f.zip | |
KVM: Avoid infinite-frequency local apic timer
If the local apic initial count is zero, don't start a an hrtimer with infinite
frequency, locking up the host.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 2cbee9479ce4..68a6b1511934 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -647,6 +647,10 @@ static void start_apic_timer(struct kvm_lapic *apic) apic->timer.period = apic_get_reg(apic, APIC_TMICT) * APIC_BUS_CYCLE_NS * apic->timer.divide_count; atomic_set(&apic->timer.pending, 0); + + if (!apic->timer.period) + return; + hrtimer_start(&apic->timer.dev, ktime_add_ns(now, apic->timer.period), HRTIMER_MODE_ABS); |