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| author | Marc Zyngier <maz@kernel.org> | 2019-03-18 12:45:22 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2019-08-18 18:38:39 +0100 |
| commit | 1bb3691d8330f09a0699c124fcb71991b5fd105b (patch) | |
| tree | f2ae436cfe49dff4ddca186e0e9397ba2fb0f72e /virt | |
| parent | 24cab82c34aa6f3ede3de1d8621624cb5ef33feb (diff) | |
| download | linux-stable-1bb3691d8330f09a0699c124fcb71991b5fd105b.tar.gz linux-stable-1bb3691d8330f09a0699c124fcb71991b5fd105b.tar.bz2 linux-stable-1bb3691d8330f09a0699c124fcb71991b5fd105b.zip | |
KVM: arm/arm64: vgic: Add __vgic_put_lpi_locked primitive
Our LPI translation cache needs to be able to drop the refcount
on an LPI whilst already holding the lpi_list_lock.
Let's add a new primitive for this.
Tested-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.c | 26 | ||||
| -rw-r--r-- | virt/kvm/arm/vgic/vgic.h | 1 |
2 files changed, 18 insertions, 9 deletions
diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index 13d4b38a94ec..846bb680fd45 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -119,6 +119,22 @@ static void vgic_irq_release(struct kref *ref) { } +/* + * Drop the refcount on the LPI. Must be called with lpi_list_lock held. + */ +void __vgic_put_lpi_locked(struct kvm *kvm, struct vgic_irq *irq) +{ + struct vgic_dist *dist = &kvm->arch.vgic; + + if (!kref_put(&irq->refcount, vgic_irq_release)) + return; + + list_del(&irq->lpi_list); + dist->lpi_list_count--; + + kfree(irq); +} + void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq) { struct vgic_dist *dist = &kvm->arch.vgic; @@ -128,16 +144,8 @@ void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq) return; raw_spin_lock_irqsave(&dist->lpi_list_lock, flags); - if (!kref_put(&irq->refcount, vgic_irq_release)) { - raw_spin_unlock_irqrestore(&dist->lpi_list_lock, flags); - return; - }; - - list_del(&irq->lpi_list); - dist->lpi_list_count--; + __vgic_put_lpi_locked(kvm, irq); raw_spin_unlock_irqrestore(&dist->lpi_list_lock, flags); - - kfree(irq); } void vgic_flush_pending_lpis(struct kvm_vcpu *vcpu) diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h index a25b790ffa4e..8e9413e317b8 100644 --- a/virt/kvm/arm/vgic/vgic.h +++ b/virt/kvm/arm/vgic/vgic.h @@ -161,6 +161,7 @@ vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev, gpa_t addr, int len); struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 intid); +void __vgic_put_lpi_locked(struct kvm *kvm, struct vgic_irq *irq); void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq); bool vgic_get_phys_line_level(struct vgic_irq *irq); void vgic_irq_set_phys_pending(struct vgic_irq *irq, bool pending); |