[PATCH 17/18] KVM: ARM: vgic: add the GICv3 backend

[Will Deacon]

On Wed, Feb 05, 2014 at 01:30:49PM +0000, Marc Zyngier wrote:
> Introduce the support code for emulating a GICv2 on top of GICv3
> hardware.
> 
> Acked-by: Catalin Marinas <catalin.marinas at arm.com>
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
> ---
>  include/kvm/arm_vgic.h |  26 ++++++
>  virt/kvm/arm/vgic-v3.c | 220 +++++++++++++++++++++++++++++++++++++++++++++++++
>  virt/kvm/arm/vgic.c    |   2 +
>  3 files changed, 248 insertions(+)
>  create mode 100644 virt/kvm/arm/vgic-v3.c
> 
> diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
> index c95039a..caeb8f4 100644
> --- a/include/kvm/arm_vgic.h
> +++ b/include/kvm/arm_vgic.h
> @@ -32,6 +32,7 @@
>  #define VGIC_NR_SHARED_IRQS	(VGIC_NR_IRQS - VGIC_NR_PRIVATE_IRQS)
>  #define VGIC_MAX_CPUS		KVM_MAX_VCPUS
>  #define VGIC_MAX_LRS		(1 << 6)
> +#define VGIC_V3_MAX_LRS		16

Since we have fewer list registers, doesn't the code in vgic.c need updating
to honour the relevant bounds? (e.g. the use of find_first_zero_bit in
vgic_queue_irq).

Will