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author | Marc Zyngier <maz@kernel.org> | 2019-06-10 12:26:37 +0300 |
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committer | Marc Zyngier <maz@kernel.org> | 2019-08-18 20:38:42 +0300 |
commit | 7d825fd6eaa7467c9b737fd5cf46e45f298d1c20 (patch) | |
tree | 0329fa92399a21a7dca32ab4f3aa9cfe94a96414 /virt/kvm/arm/vgic/vgic-its.c | |
parent | 1bb3691d8330f09a0699c124fcb71991b5fd105b (diff) | |
download | linux-7d825fd6eaa7467c9b737fd5cf46e45f298d1c20.tar.xz |
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/kvm/arm/vgic/vgic-its.c')
-rw-r--r-- | virt/kvm/arm/vgic/vgic-its.c | 23 |
1 files changed, 23 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) { |