Re: [PATCH v2 17/19] iommu: Add max num of cache and granu types

Auger Eric
2019-04-26T16:22:56Z

Hi Jacob,

On 4/24/19 1:31 AM, Jacob Pan wrote:
> To convert to/from cache types and granularities between generic and
> VT-d specific counterparts, a 2D arrary is used. Introduce the limits
array
> to help define the converstion array size.
conversion
>
> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
> ---
> include/uapi/linux/iommu.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h
> index 5c95905..2d8fac8 100644
> --- a/include/uapi/linux/iommu.h
> +++ b/include/uapi/linux/iommu.h
> @@ -197,6 +197,7 @@ struct iommu_inv_addr_info {
> __u64 granule_size;
> __u64 nb_granules;
> };
> +#define NR_IOMMU_CACHE_INVAL_GRANU (3)
>
> /**
> * First level/stage invalidation information
> @@ -235,6 +236,7 @@ struct iommu_cache_invalidate_info {
> struct iommu_inv_addr_info addr_info;
> };
> };
> +#define NR_IOMMU_CACHE_TYPE (3)
> /**
> * struct gpasid_bind_data - Information about device and guest PASID binding
> * @gcr3: Guest CR3 value from guest mm
>
Is it really something that needs to be exposed in the uapi?

Thanks

Eric