KVM: arm/arm64: Clean up vgic_retire_lr() and surroundings
1. Remove unnecessary 'irq' argument, because irq number can be retrieved
from the LR.
2. Since cff9211eb1a1f58ce7f5a2d596b617928fd4be0e
("arm/arm64: KVM: Fix arch timer behavior for disabled interrupts ")
LR_STATE_PENDING is queued back by vgic_retire_lr() itself. Also, it
clears vlr.state itself. Therefore, we remove the same, now duplicated,
check with all accompanying bit manipulations from vgic_unqueue_irqs().
3. vgic_retire_lr() is always accompanied by vgic_irq_clear_queued(). Since
it already does more than just clearing the LR, move
vgic_irq_clear_queued() inside of it.
Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 265a410..96e45f3 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -105,7 +105,7 @@
#include "vgic.h"
static void vgic_retire_disabled_irqs(struct kvm_vcpu *vcpu);
-static void vgic_retire_lr(int lr_nr, int irq, struct kvm_vcpu *vcpu);
+static void vgic_retire_lr(int lr_nr, struct kvm_vcpu *vcpu);
static struct vgic_lr vgic_get_lr(const struct kvm_vcpu *vcpu, int lr);
static void vgic_set_lr(struct kvm_vcpu *vcpu, int lr, struct vgic_lr lr_desc);
static u64 vgic_get_elrsr(struct kvm_vcpu *vcpu);
@@ -717,30 +717,14 @@
* interrupt then move the active state to the
* distributor tracking bit.
*/
- if (lr.state & LR_STATE_ACTIVE) {
+ if (lr.state & LR_STATE_ACTIVE)
vgic_irq_set_active(vcpu, lr.irq);
- lr.state &= ~LR_STATE_ACTIVE;
- }
/*
* Reestablish the pending state on the distributor and the
- * CPU interface. It may have already been pending, but that
- * is fine, then we are only setting a few bits that were
- * already set.
+ * CPU interface and mark the LR as free for other use.
*/
- if (lr.state & LR_STATE_PENDING) {
- vgic_dist_irq_set_pending(vcpu, lr.irq);
- lr.state &= ~LR_STATE_PENDING;
- }
-
- vgic_set_lr(vcpu, i, lr);
-
- /*
- * Mark the LR as free for other use.
- */
- BUG_ON(lr.state & LR_STATE_MASK);
- vgic_retire_lr(i, lr.irq, vcpu);
- vgic_irq_clear_queued(vcpu, lr.irq);
+ vgic_retire_lr(i, vcpu);
/* Finally update the VGIC state. */
vgic_update_state(vcpu->kvm);
@@ -1099,16 +1083,18 @@
vgic_ops->enable(vcpu);
}
-static void vgic_retire_lr(int lr_nr, int irq, struct kvm_vcpu *vcpu)
+static void vgic_retire_lr(int lr_nr, struct kvm_vcpu *vcpu)
{
struct vgic_lr vlr = vgic_get_lr(vcpu, lr_nr);
+ vgic_irq_clear_queued(vcpu, vlr.irq);
+
/*
* We must transfer the pending state back to the distributor before
* retiring the LR, otherwise we may loose edge-triggered interrupts.
*/
if (vlr.state & LR_STATE_PENDING) {
- vgic_dist_irq_set_pending(vcpu, irq);
+ vgic_dist_irq_set_pending(vcpu, vlr.irq);
vlr.hwirq = 0;
}
@@ -1135,11 +1121,8 @@
for_each_clear_bit(lr, elrsr_ptr, vgic->nr_lr) {
struct vgic_lr vlr = vgic_get_lr(vcpu, lr);
- if (!vgic_irq_is_enabled(vcpu, vlr.irq)) {
- vgic_retire_lr(lr, vlr.irq, vcpu);
- if (vgic_irq_is_queued(vcpu, vlr.irq))
- vgic_irq_clear_queued(vcpu, vlr.irq);
- }
+ if (!vgic_irq_is_enabled(vcpu, vlr.irq))
+ vgic_retire_lr(lr, vcpu);
}
}
