On Mon, 2014-10-13 at 15:09 +0200, Antonios Motakis wrote:
> We introduce the VFIO_DMA_MAP_FLAG_NOEXEC flag to the VFIO dma map call,
> and expose its availability via the capability VFIO_DMA_NOEXEC_IOMMU.
> This way the user can control whether the XN flag will be set on the
> requested mappings. The IOMMU_NOEXEC flag needs to be available for all
> the IOMMUs of the container used.
>
> Signed-off-by: Antonios Motakis <[email protected]>
> ---
> include/uapi/linux/vfio.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
> index 6612974..111b5e8 100644
> --- a/include/uapi/linux/vfio.h
> +++ b/include/uapi/linux/vfio.h
> @@ -29,6 +29,7 @@
> * capability is subject to change as groups are added or removed.
> */
> #define VFIO_DMA_CC_IOMMU 4
> +#define VFIO_DMA_NOEXEC_IOMMU 5
>
> /* Check if EEH is supported */
> #define VFIO_EEH 5
^^
5 is still already used. Feel free to convert to enum so we stop making
this mistake.
> @@ -401,6 +402,7 @@ struct vfio_iommu_type1_dma_map {
> __u32 flags;
> #define VFIO_DMA_MAP_FLAG_READ (1 << 0) /* readable from device
> */
> #define VFIO_DMA_MAP_FLAG_WRITE (1 << 1) /* writable from device */
> +#define VFIO_DMA_MAP_FLAG_NOEXEC (1 << 2) /* not executable from device */
> __u64 vaddr; /* Process virtual address */
> __u64 iova; /* IO virtual address */
> __u64 size; /* Size of mapping (bytes) */
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