Hi Marc,
On 6/11/19 7:03 PM, Marc Zyngier wrote:
> There's a number of cases where we need to invalidate the caching
> of translations, so let's add basic support for that.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
Thanks
Eric
> ---
> virt/kvm/arm/vgic/vgic-its.c | 23 +++++++++++++++++++++++
> virt/kvm/arm/vgic/vgic.h | 1 +
> 2 files changed, 24 insertions(+)
>
> diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
> index ce9bcddeb7f1..9b6b66204b97 100644
> --- a/virt/kvm/arm/vgic/vgic-its.c
> +++ b/virt/kvm/arm/vgic/vgic-its.c
> @@ -546,6 +546,29 @@ 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 afac2fed7df4..072f810dc441 100644
> --- a/virt/kvm/arm/vgic/vgic.h
> +++ b/virt/kvm/arm/vgic/vgic.h
> @@ -319,6 +319,7 @@ 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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