Re: [RFC PATCH v6 02/20] iommu: add capability IOMMU_CAP_NOEXEC

[Alex Williamson]

On Thu, 2014-06-05 at 19:03 +0200, Antonios Motakis wrote:
> Some IOMMUs accept an IOMMU_NOEXEC protection flag in addition to
> IOMMU_READ and IOMMU_WRITE. Expose this as an IOMMU capability.
> 
> Signed-off-by: Antonios Motakis <a.motakis@xxxxxxxxxxxxxxxxxxxxxx>
> ---
>  include/linux/iommu.h | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index fc464d2..7e152fb 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -57,8 +57,9 @@ struct iommu_domain {
>  	struct iommu_domain_geometry geometry;
>  };
>  
> -#define IOMMU_CAP_CACHE_COHERENCY	0x1
> -#define IOMMU_CAP_INTR_REMAP		0x2	/* isolates device intrs */
> +#define IOMMU_CAP_CACHE_COHERENCY	(1 << 0)
> +#define IOMMU_CAP_INTR_REMAP		(1 << 1) /* isolates device intrs */
> +#define IOMMU_CAP_NOEXEC		(1 << 2) /* IOMMU_NOEXEC flag */
>  
>  /*
>   * Following constraints are specifc to FSL_PAMUV1:

Hmm, was this really intended to be a bitmap?  Why?  Thanks,

Alex

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