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| author | Eric Auger <eric.auger@linaro.org> | 2015-12-07 16:30:38 +0100 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2016-05-20 15:39:49 +0200 |
| commit | 90eee56c5f9081686035972dfcddfd6c85cafdf9 (patch) | |
| tree | aaab7b44a2246a15b18cbb36da10395baa9ec467 | |
| parent | KVM: arm/arm64: vgic-new: Add GICv3 world switch backend (diff) | |
| download | linux-90eee56c5f9081686035972dfcddfd6c85cafdf9.tar.xz linux-90eee56c5f9081686035972dfcddfd6c85cafdf9.zip | |
KVM: arm/arm64: vgic-new: Implement kvm_vgic_vcpu_pending_irq
Tell KVM whether a particular VCPU has an IRQ that needs handling
in the guest. This is used to decide whether a VCPU is runnable.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
| -rw-r--r-- | include/kvm/vgic/vgic.h | 2 | ||||
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.c | 25 |
2 files changed, 27 insertions, 0 deletions
diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h index 9506267498e5..f6632880870f 100644 --- a/include/kvm/vgic/vgic.h +++ b/include/kvm/vgic/vgic.h @@ -184,6 +184,8 @@ struct vgic_cpu { int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid, bool level); +int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu); + #define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel)) #define vgic_initialized(k) (false) #define vgic_ready(k) ((k)->arch.vgic.ready) diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index 0bf0d2060053..7e010087224c 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -520,3 +520,28 @@ void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) vgic_flush_lr_state(vcpu); spin_unlock(&vcpu->arch.vgic_cpu.ap_list_lock); } + +int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu) +{ + struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; + struct vgic_irq *irq; + bool pending = false; + + if (!vcpu->kvm->arch.vgic.enabled) + return false; + + spin_lock(&vgic_cpu->ap_list_lock); + + list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) { + spin_lock(&irq->irq_lock); + pending = irq->pending && irq->enabled; + spin_unlock(&irq->irq_lock); + + if (pending) + break; + } + + spin_unlock(&vgic_cpu->ap_list_lock); + + return pending; +} |