Re: [PATCH v4 3/7] arch, arm: let map_mmio_regions() take pfn as parameters

[Julien Grall <julien.grall@linaro.org>]

Hi Arianna,

Thank you for the patch.

On 03/25/2014 02:02 AM, Arianna Avanzini wrote:
> Currently, the map_mmio_regions() function, defined for the ARM
> architecture, has parameters with paddr_t type. This interface,
> however, needs caller functions to correctly page-align addresses
> given as parameters to map_mmio_regions(). This commit changes the
> function's interface to accept page frame numbers as parameters.
> This commit also modifies caller functions in an attempt to adapt
> them to the new interface.
> 
> NOTE: platform-specific code has not been tested.
> 
> Signed-off-by: Arianna Avanzini <avanzini.arianna@gmail.com>
> Cc: Dario Faggioli <dario.faggioli@citrix.com>
> Cc: Paolo Valente <paolo.valente@unimore.it>
> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> Cc: Julien Grall <julien.grall@citrix.com>
> Cc: Ian Campbell <Ian.Campbell@eu.citrix.com>
> Cc: Jan Beulich <JBeulich@suse.com>
> Cc: Keir Fraser <keir@xen.org>
> Cc: Tim Deegan <tim@xen.org>
> Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>
> Cc: Eric Trudeau <etrudeau@broadcom.com>
> Cc: Viktor Kleinik <viktor.kleinik@globallogic.com>
> ---
>  xen/arch/arm/domain_build.c          |  7 ++++---
>  xen/arch/arm/gic.c                   | 21 ++++++++++++---------
>  xen/arch/arm/p2m.c                   | 13 ++++++++-----
>  xen/arch/arm/platforms/exynos5.c     | 13 ++++++++-----
>  xen/arch/arm/platforms/omap5.c       | 25 ++++++++++++++++---------
>  xen/arch/arm/platforms/xgene-storm.c |  4 +++-
>  xen/include/asm-arm/p2m.h            | 11 ++++++-----
>  7 files changed, 57 insertions(+), 37 deletions(-)
> 
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index 4a0411c..10f508d 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -744,9 +744,10 @@ static int map_device(struct domain *d, const struct dt_device_node *dev)
>                     addr & PAGE_MASK, PAGE_ALIGN(addr + size) - 1);
>              return res;
>          }
> -        res = map_mmio_regions(d, addr & PAGE_MASK,
> -                               PAGE_ALIGN(addr + size) - 1,
> -                               addr & PAGE_MASK);
> +        res = map_mmio_regions(d,
> +                               paddr_to_pfn(addr & PAGE_MASK),
> +                               paddr_to_pfn(PAGE_ALIGN(addr + size - 1)),

It would be nice a have a macro for paddr_to_pfn(PAGE_ALIGN(...)). You
are using this pattern multiple times in the patch.

Regards,

-- 
Julien Grall