On Fri, Oct 06, 2017 at 04:33:42PM +0100, Marc Zyngier wrote:
> Add a new has_gicv4 field in the global VGIC state that indicates
> whether the HW is GICv4 capable, as a per-VM predicate indicating
> if there is a possibility for a VM to support direct injection
> (the above being true and the VM having an ITS).
>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Acked-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
> ---
> include/kvm/arm_vgic.h | 3 +++
> virt/kvm/arm/vgic/vgic-mmio-v3.c | 5 +++++
> virt/kvm/arm/vgic/vgic.h | 2 ++
> 3 files changed, 10 insertions(+)
>
> diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
> index 53f631bdec75..ba9fb450aa1b 100644
> --- a/include/kvm/arm_vgic.h
> +++ b/include/kvm/arm_vgic.h
> @@ -73,6 +73,9 @@ struct vgic_global {
> /* Only needed for the legacy KVM_CREATE_IRQCHIP */
> bool can_emulate_gicv2;
>
> + /* Hardware has GICv4? */
> + bool has_gicv4;
> +
> /* GIC system register CPU interface */
> struct static_key_false gicv3_cpuif;
>
> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> index 408ef06638fc..f87fd17b2eb9 100644
> --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
> +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
> @@ -54,6 +54,11 @@ bool vgic_has_its(struct kvm *kvm)
> return dist->has_its;
> }
>
> +bool vgic_supports_direct_msis(struct kvm *kvm)
> +{
> + return kvm_vgic_global_state.has_gicv4 && vgic_has_its(kvm);
> +}
> +
> static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
> gpa_t addr, unsigned int len)
> {
> diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
> index 31b70326b966..e67ccb6a6250 100644
> --- a/virt/kvm/arm/vgic/vgic.h
> +++ b/virt/kvm/arm/vgic/vgic.h
> @@ -240,4 +240,6 @@ int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
> u32 devid, u32 eventid, struct vgic_irq **irq);
> struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
>
> +bool vgic_supports_direct_msis(struct kvm *kvm);
> +
> #endif
> --
> 2.14.1
>
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