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authorMarc Zyngier <marc.zyngier@arm.com>2017-10-27 15:28:49 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2017-11-10 09:43:22 +0100
commitdf9ba95993b9d59e077aa4613f7a4edd20a4064c (patch)
tree8713bc9daf8417cd984eea21872094fee01a8102 /include/kvm
parentbdb2d2ccac65dfee0db8fa4a8247df788a942439 (diff)
downloadlinux-df9ba95993b9d59e077aa4613f7a4edd20a4064c.tar.bz2
KVM: arm/arm64: GICv4: Use the doorbell interrupt as an unblocking source
The doorbell interrupt is only useful if the vcpu is blocked on WFI. In all other cases, recieving a doorbell interrupt is just a waste of cycles. So let's only enable the doorbell if a vcpu is getting blocked, and disable it when it is unblocked. This is very similar to what we're doing for the background timer. Reviewed-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'include/kvm')
-rw-r--r--include/kvm/arm_vgic.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 2f750c770bf2..8c896540a72c 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -381,4 +381,7 @@ int kvm_vgic_v4_set_forwarding(struct kvm *kvm, int irq,
int kvm_vgic_v4_unset_forwarding(struct kvm *kvm, int irq,
struct kvm_kernel_irq_routing_entry *irq_entry);
+void kvm_vgic_v4_enable_doorbell(struct kvm_vcpu *vcpu);
+void kvm_vgic_v4_disable_doorbell(struct kvm_vcpu *vcpu);
+
#endif /* __KVM_ARM_VGIC_H */