redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

KVM: arm/arm64: Guard kvm_vgic_map_is_active against !vgic_initialized 

If the vgic is not initialized, don't try to grab its spinlocks or
traverse its data structures.

This is important because we soon have to start considering the active
state of a virtual interrupts when doing vcpu_load, which may happen
early on before the vgic is initialized.

Signed-off-by: Christoffer Dall <cdall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
hifive-unleashed-5.1
Christoffer Dall 2016-10-19 12:40:17 +02:00 committed by Christoffer Dall
parent e6d68b00e9
commit f39d16cbab
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
virt/kvm/arm/vgic/vgic.c
View File

@ -777,6 +777,9 @@ bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq)
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
bool map_is_active;
if (!vgic_initialized(vcpu->kvm))
return false;
spin_lock(&irq->irq_lock);
map_is_active = irq->hw && irq->active;
spin_unlock(&irq->irq_lock);