In order to remove the crude hack where we sneak the masked bit
into the timer's control register, make use of the phys_irq_map
API control the active state of the interrupt.
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
include/kvm/arm_arch_timer.h | 3 +++
virt/kvm/arm/arch_timer.c | 13 +++++++++++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h
index e596675..9feebf1 100644
--- a/include/kvm/arm_arch_timer.h
+++ b/include/kvm/arm_arch_timer.h
@@ -52,6 +52,9 @@ struct arch_timer_cpu {
/* Timer IRQ */
const struct kvm_irq_level *irq;
+
+ /* VGIC mapping */
+ struct irq_phys_map *map;
};
int kvm_timer_hyp_init(void);
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 98c95f2..b9fff78 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -64,7 +64,7 @@ static void kvm_timer_inject_irq(struct kvm_vcpu *vcpu)
int ret;
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
- timer->cntv_ctl |= ARCH_TIMER_CTRL_IT_MASK;
+ vgic_set_phys_irq_active(timer->map, true);
ret = kvm_vgic_inject_irq(vcpu->kvm, vcpu->vcpu_id,
timer->irq->irq,
timer->irq->level);
@@ -117,7 +117,8 @@ bool kvm_timer_should_fire(struct kvm_vcpu *vcpu)
cycle_t cval, now;
if ((timer->cntv_ctl & ARCH_TIMER_CTRL_IT_MASK) ||
- !(timer->cntv_ctl & ARCH_TIMER_CTRL_ENABLE))
+ !(timer->cntv_ctl & ARCH_TIMER_CTRL_ENABLE) ||
+ vgic_get_phys_irq_active(timer->map))
return false;
cval = timer->cntv_cval;
@@ -196,6 +197,13 @@ void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
* vcpu timer irq number when the vcpu is reset.
*/
timer->irq = irq;
+
+ /*
+ * Tell the VGIC that the virtual interrupt is tied to a
+ * physical interrupt. We do that once per VCPU.
+ */
+ timer->map = vgic_map_phys_irq(vcpu, irq->irq, host_vtimer_irq);
+ WARN_ON(!timer->map);
}
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
@@ -335,6 +343,7 @@ void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu)
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
timer_disarm(timer);
+ vgic_unmap_phys_irq(vcpu, timer->map);
}
void kvm_timer_enable(struct kvm *kvm)
--
2.1.4
--
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