[PATCH v4 11/26] KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPI

Marc Zyngier
2017-10-06T15:34:02Z

When freeing an LPI (on a DISCARD command, for example), we need
to unmap the VLPI down to the physical ITS level.

Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
virt/kvm/arm/vgic/vgic-its.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index b2a678d131d0..c9b1c0967426 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -628,8 +628,12 @@ static void its_free_ite(struct kvm *kvm, struct its_ite *ite)
list_del(&ite->ite_list);

/* This put matches the get in vgic_add_lpi. */
- if (ite->irq)
+ if (ite->irq) {
+ if (ite->irq->hw)
+ WARN_ON(its_unmap_vlpi(ite->irq->host_irq));
+
vgic_put_irq(kvm, ite->irq);
+ }

kfree(ite);
}
--
2.14.1