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| author | Andre Przywara <andre.przywara@arm.com> | 2016-07-15 11:43:27 (GMT) |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-07-18 17:10:48 (GMT) |
| commit | 5dd4b924e390af426e424d5e52c1b4d1566af817 (patch) | |
| tree | 8ed824f7d4811703b70ff10449b11f7257f2c063 /virt/kvm/arm/vgic/vgic-v3.c | |
| parent | 8a39d00670f0792c1186e442e1dd28fe0326f2ee (diff) | |
| download | linux-5dd4b924e390af426e424d5e52c1b4d1566af817.tar.xz | |
KVM: arm/arm64: vgic: Add refcounting for IRQs
In the moment our struct vgic_irq's are statically allocated at guest
creation time. So getting a pointer to an IRQ structure is trivial and
safe. LPIs are more dynamic, they can be mapped and unmapped at any time
during the guest's _runtime_.
In preparation for supporting LPIs we introduce reference counting for
those structures using the kernel's kref infrastructure.
Since private IRQs and SPIs are statically allocated, we avoid actually
refcounting them, since they would never be released anyway.
But we take provisions to increase the refcount when an IRQ gets onto a
VCPU list and decrease it when it gets removed. Also this introduces
vgic_put_irq(), which wraps kref_put and hides the release function from
the callers.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-v3.c')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-v3.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index e48a22e..f0ac064 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -113,6 +113,7 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu) } spin_unlock(&irq->irq_lock); + vgic_put_irq(vcpu->kvm, irq); } } |