Re: [Xen-devel] [PATCH v4 6/8] xen: arm: add some helpers for assessing p2m pte

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hi Ian,

On 07/01/2014 09:26 AM, Ian Campbell wrote:
> Not terribly helpful right now, since they aren't widely used, but makes 
> future
> patches easier to read.
> 
> p2m_mapping is unused for the time-being and is therefore commented out
> (otherwise the compiler complains about an unused function).
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> ---
> v3: Use static functions. s/p2m_entry/p2m_mapping/ as its a better name.
> v2: clarify common on p2m_{table,entry}
> ---
>  xen/arch/arm/p2m.c |   30 +++++++++++++++++++++++-------
>  1 file changed, 23 insertions(+), 7 deletions(-)
> 
> diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
> index 8a6d295..b51dc1b 100644
> --- a/xen/arch/arm/p2m.c
> +++ b/xen/arch/arm/p2m.c
> @@ -14,6 +14,22 @@
>  #define P2M_FIRST_ORDER 1
>  #define P2M_FIRST_ENTRIES (LPAE_ENTRIES<<P2M_FIRST_ORDER)
>  
> +static bool_t p2m_valid(lpae_t pte) {
> +    return pte.p2m.valid;
> +}

NIT: The { has to be on another line.

> +/* These two can only be used on L0..L2 ptes because L3 mappings set
> + * the table bit and therefore these would return the opposite to what
> + * you would expect. */
> +static bool_t p2m_table(lpae_t pte)
> +{
> +    return p2m_valid(pte) && pte.p2m.table;
> +}
> +#if 0
> +static bool_t p2m_mapping(lpae_t pte) {

Same here.

> +    return p2m_valid(pte) && !pte.p2m.table;
> +}
> +#endif
> +

With theses small changes:

Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>

Regards,

-- 
Julien Grall

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