Re: [Xen-devel] [PATCH 1/8] arm/gic-v3: Add a separate function for mapping GICD region

[Julien Grall <julien.grall@xxxxxxx>]

Hello Shanker,

On 19/06/16 00:45, Shanker Donthineni wrote:
> Move the code that validates base address and does ioremap of GIC
> distributor region to a separate function. Later patches need to
> access the GICD region inside function gicv3_acpi_init() for
> finding per CPU Redistributor size.
This patch contains two things:
   - A clean up: I.e moving the validation/ioremap in a function
   - Calling ioremap map earlier

The latter is the most important point of this patch, not the clean up. 
However based on your commit message/title, only the clean up matter.
Please reword the commit message/title to make clear what matters.

> Signed-off-by: Shanker Donthineni <shankerd@xxxxxxxxxxxxxx>
> ---
>   xen/arch/arm/gic-v3.c | 23 +++++++++++++----------
>   1 file changed, 13 insertions(+), 10 deletions(-)
>
> diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
> index 8d3f149..ab1f380 100644
> --- a/xen/arch/arm/gic-v3.c
> +++ b/xen/arch/arm/gic-v3.c
> @@ -1169,6 +1169,17 @@ static void __init gicv3_init_v2(void)
>       vgic_v2_setup_hw(dbase, cbase, csize, vbase, 0);
>   }
>
> +static void __init gicv3_ioremap_distributor(paddr_t dist_paddr)
> +{
> +    if ( (dist_paddr & ~PAGE_MASK) )
The second pair of brackets is pointless.

> +        panic("GICv3:  Found unaligned distributor address %"PRIpaddr"",
> +              dbase);
> +
> +    gicv3.map_dbase = ioremap_nocache(dist_paddr, SZ_64K);
> +    if ( !gicv3.map_dbase )
> +        panic("GICv3: Failed to ioremap for GIC distributor\n");
> +}
> +
Regards,

--
Julien Grall

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