Hi Andre,
minor comment: patch title has been altered since v1, should be
KVM: arm/arm64: vgic-new: Implement kvm_vgic_vcpu_pending_irq
Cheers
Eric
On 04/28/2016 06:45 PM, Andre Przywara wrote:
> From: Eric Auger <eric.auger@xxxxxxxxxx>
>
> 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@xxxxxxxxxx>
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
> ---
> Changelog RFC..v1:
> - return false if distributor is disabled
> - add vgic_kick_vcpus() implementations
>
> include/kvm/vgic/vgic.h | 2 ++
> virt/kvm/arm/vgic/vgic.c | 40 ++++++++++++++++++++++++++++++++++++++++
> virt/kvm/arm/vgic/vgic.h | 1 +
> 3 files changed, 43 insertions(+)
>
> diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h
> index 5fae4a9..2615205 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 ae52928..eeb766e 100644
> --- a/virt/kvm/arm/vgic/vgic.c
> +++ b/virt/kvm/arm/vgic/vgic.c
> @@ -519,3 +519,43 @@ 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;
> +}
> +
> +void vgic_kick_vcpus(struct kvm *kvm)
> +{
> + struct kvm_vcpu *vcpu;
> + int c;
> +
> + /*
> + * We've injected an interrupt, time to find out who deserves
> + * a good kick...
> + */
> + kvm_for_each_vcpu(c, vcpu, kvm) {
> + if (kvm_vgic_vcpu_pending_irq(vcpu))
> + kvm_vcpu_kick(vcpu);
> + }
> +}
> diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
> index 81b1a20..0c92cda 100644
> --- a/virt/kvm/arm/vgic/vgic.h
> +++ b/virt/kvm/arm/vgic/vgic.h
> @@ -21,6 +21,7 @@
> struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
> u32 intid);
> bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq);
> +void vgic_kick_vcpus(struct kvm *kvm);
>
> void vgic_v2_process_maintenance(struct kvm_vcpu *vcpu);
> void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
>
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