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authorMarc Zyngier <maz@kernel.org>2019-06-10 10:26:37 +0100
committerMarc Zyngier <maz@kernel.org>2019-08-18 18:38:42 +0100
commit7d825fd6eaa7467c9b737fd5cf46e45f298d1c20 (patch)
tree0329fa92399a21a7dca32ab4f3aa9cfe94a96414 /virt
parent1bb3691d8330f09a0699c124fcb71991b5fd105b (diff)
KVM: arm/arm64: vgic-its: Add MSI-LPI translation cache invalidation
There's a number of cases where we need to invalidate the caching of translations, so let's add basic support for that. 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.c23
-rw-r--r--virt/kvm/arm/vgic/vgic.h1
2 files changed, 24 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 0e5c1519bbe2..cc6b5e49a312 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -535,6 +535,29 @@ static unsigned long vgic_mmio_read_its_idregs(struct kvm *kvm,
return 0;
}
+void vgic_its_invalidate_cache(struct kvm *kvm)
+{
+ struct vgic_dist *dist = &kvm->arch.vgic;
+ struct vgic_translation_cache_entry *cte;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&dist->lpi_list_lock, flags);
+
+ list_for_each_entry(cte, &dist->lpi_translation_cache, entry) {
+ /*
+ * If we hit a NULL entry, there is nothing after this
+ * point.
+ */
+ if (!cte->irq)
+ break;
+
+ __vgic_put_lpi_locked(kvm, cte->irq);
+ cte->irq = NULL;
+ }
+
+ raw_spin_unlock_irqrestore(&dist->lpi_list_lock, flags);
+}
+
int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
u32 devid, u32 eventid, struct vgic_irq **irq)
{
diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
index 8e9413e317b8..c7fb4da2ab3b 100644
--- a/virt/kvm/arm/vgic/vgic.h
+++ b/virt/kvm/arm/vgic/vgic.h
@@ -310,6 +310,7 @@ int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
void vgic_lpi_translation_cache_init(struct kvm *kvm);
void vgic_lpi_translation_cache_destroy(struct kvm *kvm);
+void vgic_its_invalidate_cache(struct kvm *kvm);
bool vgic_supports_direct_msis(struct kvm *kvm);
int vgic_v4_init(struct kvm *kvm);

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