Re: [Xen-devel] [for-4.8][PATCH v2 05/23] xen/arm: p2m: Add a back pointer to domain in p2m_domain

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 15 Sep 2016, Julien Grall wrote:
> The back pointer will be usefult later to get the domain when we only
> have the p2m in hand.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
>     Changes in v2:
>         - Patch added
> ---
>  xen/arch/arm/p2m.c        | 1 +
>  xen/include/asm-arm/p2m.h | 3 +++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
> index 950a607..5cf136f 100644
> --- a/xen/arch/arm/p2m.c
> +++ b/xen/arch/arm/p2m.c
> @@ -1391,6 +1391,7 @@ int p2m_init(struct domain *d)
>      if ( rc != 0 )
>          return rc;
>  
> +    p2m->domain = d;
>      p2m->max_mapped_gfn = _gfn(0);
>      p2m->lowest_mapped_gfn = _gfn(ULONG_MAX);
>  
> diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
> index b9269e4..b27a3a1 100644
> --- a/xen/include/asm-arm/p2m.h
> +++ b/xen/include/asm-arm/p2m.h
> @@ -81,6 +81,9 @@ struct p2m_domain {
>       * enough available bits to store this information.
>       */
>      struct radix_tree_root mem_access_settings;
> +
> +    /* back pointer to domain */
> +    struct domain *domain;
>  };
>  
>  /*
> -- 
> 1.9.1
> 

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