[PATCHv7 05/26] vfio: introduce the VFIO_DMA_MAP_FLAG_NOEXEC flag
From: Antonios Motakis <hidden>
Date: 2014-09-23 15:09:05
Also in:
kvm, linux-iommu, lkml
Subsystem:
the rest, vfio driver · Maintainers:
Linus Torvalds, Alex Williamson
We introduce the VFIO_DMA_MAP_FLAG_NOEXEC flag to the VFIO dma map call, and expose its availability via the capability VFIO_IOMMU_PROT_NOEXEC. 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 <a.motakis-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org> --- 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..30f630c 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_IOMMU_PROT_NOEXEC 5 /* Check if EEH is supported */ #define VFIO_EEH 5
@@ -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) */
--
1.8.3.2