From 363518f37a86acc515defae6d1ba91a6c7617de9 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Wed, 22 May 2019 18:16:49 +0100 Subject: [PATCH] KVM: arm/arm64: vgic-its: Invalidate MSI-LPI translation cache on ITS disable If an ITS gets disabled, we need to make sure that further interrupts won't hit in the cache. For that, we invalidate the translation cache when the ITS is disabled. Tested-by: Andre Przywara Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic/vgic-its.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c index 09a1798..05406bd 100644 --- a/virt/kvm/arm/vgic/vgic-its.c +++ b/virt/kvm/arm/vgic/vgic-its.c @@ -1597,6 +1597,8 @@ static void vgic_mmio_write_its_ctlr(struct kvm *kvm, struct vgic_its *its, goto out; its->enabled = !!(val & GITS_CTLR_ENABLE); + if (!its->enabled) + vgic_its_invalidate_cache(kvm); /* * Try to process any pending commands. This function bails out early -- 2.7.4