Re: [Xen-devel] [PATCH V6 01/10] xen/arm: gic-v3: Increase the size of GICR in address space for guest

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Mon, 2015-06-01 at 20:56 +0800, Chen Baozi wrote:
> From: Chen Baozi <baozich@xxxxxxxxx>
> 
> Currently it only supports up to 8 vCPUs. Increase the region to hold
> up to 128 vCPUs, which is the maximum number that GIC-500 supports.
> 
> Signed-off-by: Chen Baozi <baozich@xxxxxxxxx>
> Reviewed-by: Julien Grall <julien.grall@xxxxxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

I did briefly wonder if we should shoot for the stars here and reserve
space for some enormous set of processors, but I suppose there's no
need.

> ---
>  xen/include/public/arch-arm.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
> index c029e0f..ec0c261 100644
> --- a/xen/include/public/arch-arm.h
> +++ b/xen/include/public/arch-arm.h
> @@ -388,8 +388,8 @@ struct xen_arch_domainconfig {
>  #define GUEST_GICV3_RDIST_STRIDE   0x20000ULL
>  #define GUEST_GICV3_RDIST_REGIONS  1
>  
> -#define GUEST_GICV3_GICR0_BASE     0x03020000ULL    /* vCPU0 - vCPU7 */
> -#define GUEST_GICV3_GICR0_SIZE     0x00100000ULL
> +#define GUEST_GICV3_GICR0_BASE     0x03020000ULL    /* vCPU0 - vCPU127 */
> +#define GUEST_GICV3_GICR0_SIZE     0x01000000ULL
>  
>  /*
>   * 16MB == 4096 pages reserved for guest to use as a region to map its



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