On Mon, Jan 02, 2017 at 06:42:36PM +0530, Sricharan R wrote:
> From: Mitchel Humpherys <[email protected]>
>
> Add the IOMMU_PRIV attribute, which is used to indicate privileged
> mappings.
>
> Reviewed-by: Robin Murphy <[email protected]>
> Tested-by: Robin Murphy <[email protected]>
> Signed-off-by: Mitchel Humpherys <[email protected]>
> Acked-by: Will Deacon <[email protected]>
> ---
> include/linux/iommu.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index 0ff5111..8c15ada 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -31,6 +31,7 @@
> #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
> #define IOMMU_NOEXEC (1 << 3)
> #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */
> +#define IOMMU_PRIV (1 << 5) /* privileged */
Since this is a new generic global flag, can you please add a more
verbose comment telling what a 'privileged' mapping is about in the
iommu-case? We should have a clear defined semantic for this flag or we
might end up with different meanings for it with different
iommu-hardware.
Joerg
