Re: [Xen-devel] [PATCH v5 04/12] arm/lpae: Introduce lpae_page helper

[Julien Grall <julien.grall@xxxxxxx>]

Hi Sergej,

On 06/27/2017 12:52 PM, Sergej Proskurin wrote:
> This commit introduces a new helper that checks whether the target PTE
> holds a page mapping or not. This helper will be used as part of the
> following commits.
>
> Signed-off-by: Sergej Proskurin <proskurin@xxxxxxxxxxxxx>
Reviewed-by: Julien Grall <julien.grall@xxxxxxx>

Cheers,

> ---
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Julien Grall <julien.grall@xxxxxxx>
> ---
>   xen/include/asm-arm/lpae.h | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/xen/include/asm-arm/lpae.h b/xen/include/asm-arm/lpae.h
> index 2f7891ed0b..20565d2c8a 100644
> --- a/xen/include/asm-arm/lpae.h
> +++ b/xen/include/asm-arm/lpae.h
> @@ -153,6 +153,11 @@ static inline bool lpae_is_superpage(lpae_t pte, unsigned 
> int level)
>       return (level < 3) && lpae_mapping(pte);
>   }
>   
> +static inline bool lpae_page(lpae_t pte, unsigned int level)
> +{
> +    return (level == 3) && lpae_valid(pte) && pte.walk.table;
> +}
> +
>   /*
>    * The ARMv8 architecture supports pages with different sizes (4K, 16K, and
>    * 64K). To enable guest page table walks for various configurations, the
--
Julien Grall

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