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| author | Marc Zyngier <marc.zyngier@arm.com> | 2017-10-27 16:28:49 +0200 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2017-11-10 09:43:22 +0100 |
| commit | df9ba95993b9d59e077aa4613f7a4edd20a4064c (patch) | |
| tree | 8713bc9daf8417cd984eea21872094fee01a8102 /include | |
| parent | KVM: arm/arm64: GICv4: Add doorbell interrupt handling (diff) | |
| download | linux-df9ba95993b9d59e077aa4613f7a4edd20a4064c.tar.xz linux-df9ba95993b9d59e077aa4613f7a4edd20a4064c.zip | |
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')
| -rw-r--r-- | include/kvm/arm_vgic.h | 3 |
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 */ |