Subject: [PATCH v3 06/10] KVM: arm/arm64: vgic-its: Invalidate MSI-LPI translation cache on ITS disable

From: Marc Zyngier <[email-masked]>
Date: Thu, 25 Jul 2019 16:35:39 +0100

From: Marc Zyngier <[email-masked]>

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.

Signed-off-by: Marc Zyngier <[email-masked]>
---
 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 09a179820816..05406bd92ce9 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
-- 
2.20.1

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