Messages in this thread Patch in this message | | | From | Radim Krčmář <> | Subject | [PATCH 2/3] KVM: x86: really disarm lapic timer when clearing TMICT | Date | Fri, 6 Oct 2017 19:25:54 +0200 |
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preemption timer only looks at tscdeadline and could inject already disarmed timer.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> --- arch/x86/kvm/lapic.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 39c1ae11ce1d..96ade848ae0b 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1489,8 +1489,10 @@ static bool set_target_expiration(struct kvm_lapic *apic) apic->lapic_timer.period = (u64)kvm_lapic_get_reg(apic, APIC_TMICT) * APIC_BUS_CYCLE_NS * apic->divide_count; - if (!apic->lapic_timer.period) + if (!apic->lapic_timer.period) { + apic->lapic_timer.tscdeadline = 0; return false; + } limit_periodic_timer_frequency(apic); -- 2.14.2
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