Re: [Xen-devel] [RFC 17/22] xen/arm: p2m: Introduce a helper to check if an entry is a superpage

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 28 Jul 2016, Julien Grall wrote:
> Use the level and the entry to know whether an entry is a superpage.
> A superpage can only happen below level 3.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


>  xen/arch/arm/p2m.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
> index ca2f1b0..c93e554 100644
> --- a/xen/arch/arm/p2m.c
> +++ b/xen/arch/arm/p2m.c
> @@ -57,6 +57,11 @@ static inline bool_t p2m_mapping(lpae_t pte)
>      return p2m_valid(pte) && !pte.p2m.table;
>  }
>  
> +static inline bool_t p2m_is_superpage(lpae_t pte, unsigned int level)
> +{
> +    return (level < 3) && p2m_mapping(pte);
> +}
>
>  static inline void p2m_write_lock(struct p2m_domain *p2m)
>  {
>      write_lock(&p2m->lock);
> -- 
> 1.9.1
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel