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authorAurelien Jarno <aurelien@aurel32.net>2009-09-25 11:09:37 +0200
committerAvi Kivity <avi@redhat.com>2009-10-04 13:57:23 +0200
commitb2d83cfa3fdefe5c6573d443d099a18dc3a93c5f (patch)
tree4833580d843369a6a16a317a93114c512bc6504d /arch
parent8feda6f786fc44f5f8b5cf88e3b6c03514f5be93 (diff)
KVM: fix LAPIC timer period overflow
Don't overflow when computing the 64-bit period from 32-bit registers. Fixes sourceforge bug #2826486. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Cc: stable@kernel.org Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/lapic.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 1ae5ceba7eb2..7024224f0fc8 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -664,7 +664,7 @@ static void start_apic_timer(struct kvm_lapic *apic)
{
ktime_t now = apic->lapic_timer.timer.base->get_time();
- apic->lapic_timer.period = apic_get_reg(apic, APIC_TMICT) *
+ apic->lapic_timer.period = (u64)apic_get_reg(apic, APIC_TMICT) *
APIC_BUS_CYCLE_NS * apic->divide_count;
atomic_set(&apic->lapic_timer.pending, 0);