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authorMarc Zyngier <marc.zyngier@arm.com>2016-06-02 09:24:06 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2016-06-02 11:52:21 +0200
commit05fb05a6ca25e02ad8c31bc440b3c4996864f379 (patch)
tree88be4e84a1c257e7e999d7bd344c511c66e7973e /virt
parentc58513284029229842844929ddeaca44d013c128 (diff)
downloadlinux-05fb05a6ca25e02ad8c31bc440b3c4996864f379.tar.gz
linux-05fb05a6ca25e02ad8c31bc440b3c4996864f379.tar.xz
KVM: arm/arm64: vgic-new: Removel harmful BUG_ON
When changing the active bit from an MMIO trap, we decide to explode if the intid is that of a private interrupt. This flawed logic comes from the fact that we were assuming that kvm_vcpu_kick() as called by kvm_arm_halt_vcpu() would not return before the called vcpu responded, but this is not the case, so we need to perform this wait even for private interrupts. Dropping the BUG_ON seems like the right thing to do. [ Commit message tweaked by Christoffer ] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/virt/kvm/arm/vgic/vgic-mmio.c b/virt/kvm/arm/vgic/vgic-mmio.c
index 059595e..9f6fab7 100644
--- a/virt/kvm/arm/vgic/vgic-mmio.c
+++ b/virt/kvm/arm/vgic/vgic-mmio.c
@@ -191,10 +191,8 @@ static void vgic_mmio_change_active(struct kvm_vcpu *vcpu, struct vgic_irq *irq,
* other thread sync back the IRQ.
*/
while (irq->vcpu && /* IRQ may have state in an LR somewhere */
- irq->vcpu->cpu != -1) { /* VCPU thread is running */
- BUG_ON(irq->intid < VGIC_NR_PRIVATE_IRQS);
+ irq->vcpu->cpu != -1) /* VCPU thread is running */
cond_resched_lock(&irq->irq_lock);
- }
irq->active = new_active_state;
if (new_active_state)