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authorMarc Zyngier <maz@kernel.org>2019-03-18 10:23:16 +0000
committerMarc Zyngier <maz@kernel.org>2019-08-18 18:38:45 +0100
commit0c14484866194382c0631d6e9bb14cc2fe83e814 (patch)
tree5c0ec7041257108b137df869d952788cfc98e329 /virt
parent7d825fd6eaa7467c9b737fd5cf46e45f298d1c20 (diff)
KVM: arm/arm64: vgic-its: Invalidate MSI-LPI translation cache on specific commands
The LPI translation cache needs to be discarded when an ITS command may affect the translation of an LPI (DISCARD, MAPC and MAPD with V=0) or the routing of an LPI to a redistributor with disabled LPIs (MOVI, MOVALL). We decide to perform a full invalidation of the cache, irrespective of the LPI that is affected. Commands are supposed to be rare enough that it doesn't matter. 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-its.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index cc6b5e49a312..09a179820816 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -722,6 +722,8 @@ static int vgic_its_cmd_handle_discard(struct kvm *kvm, struct vgic_its *its,
* don't bother here since we clear the ITTE anyway and the
* pending state is a property of the ITTE struct.
*/
+ vgic_its_invalidate_cache(kvm);
+
its_free_ite(kvm, ite);
return 0;
}
@@ -757,6 +759,8 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its,
ite->collection = collection;
vcpu = kvm_get_vcpu(kvm, collection->target_addr);
+ vgic_its_invalidate_cache(kvm);
+
return update_affinity(ite->irq, vcpu);
}
@@ -985,6 +989,8 @@ static void vgic_its_free_device(struct kvm *kvm, struct its_device *device)
list_for_each_entry_safe(ite, temp, &device->itt_head, ite_list)
its_free_ite(kvm, ite);
+ vgic_its_invalidate_cache(kvm);
+
list_del(&device->dev_list);
kfree(device);
}
@@ -1090,6 +1096,7 @@ static int vgic_its_cmd_handle_mapc(struct kvm *kvm, struct vgic_its *its,
if (!valid) {
vgic_its_free_collection(its, coll_id);
+ vgic_its_invalidate_cache(kvm);
} else {
collection = find_collection(its, coll_id);
@@ -1238,6 +1245,8 @@ static int vgic_its_cmd_handle_movall(struct kvm *kvm, struct vgic_its *its,
vgic_put_irq(kvm, irq);
}
+ vgic_its_invalidate_cache(kvm);
+
kfree(intids);
return 0;
}

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