Re: [Xen-devel] [PATCH v9 4/7] xen/arm: Add virtual GICv3 support

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Thu, 4 Sep 2014, vijay.kilari@xxxxxxxxx wrote:
> From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
> 
> Add virtual GICv3 driver support.
> Also, with this patch vgic_irq_rank structure is modified to
> hold GICv2 GICD_TARGET and GICv3 GICD_ROUTER registers under
> union.
> 
> This patch adds only basic GICv3 support.
> Does not support Interrupt Translation support (ITS)
> 
> Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
> ---
> v9: - Use 128K mask to compute GICR register offset if stride
>       is not set
>     - Fix alignment errors in vgic-v2.c
>     - Updated vgic_{lock,unlock}_rank
> v8: - Fixed printk coding styles
>     - Moved GICD_PIDRn and GICR_PIDRn macros to vgic-v3.c
>       from header file
>     - Check is made on return value of vgic_v3_init()
> v7: Fixed coding style.
> v6: Removed byte read access for IROUTERN register.
> diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
> index 129b1b5..cf3834e 100644
> --- a/xen/arch/arm/vgic.c
> +++ b/xen/arch/arm/vgic.c
> @@ -69,6 +69,12 @@ int domain_vgic_init(struct domain *d)
>  
>      switch ( gic_hw_version() )
>      {
> +#ifdef CONFIG_ARM_64
> +    case GIC_V3:
> +        if ( vgic_v3_init(d) )
> +           return -ENODEV;
> +        break;
> +#endif

Why the #ifdef?

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