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Date: Mon, 13 Oct 2014 15:09:05 +0200 From: Antonios Motakis <a.motakis@...tualopensystems.com> To: kvmarm@...ts.cs.columbia.edu, iommu@...ts.linux-foundation.org, alex.williamson@...hat.com Cc: will.deacon@....com, tech@...tualopensystems.com, christoffer.dall@...aro.org, eric.auger@...aro.org, kim.phillips@...escale.com, marc.zyngier@....com, Antonios Motakis <a.motakis@...tualopensystems.com>, kvm@...r.kernel.org (open list:VFIO DRIVER), linux-api@...r.kernel.org (open list:ABI/API), linux-kernel@...r.kernel.org (open list) Subject: [PATCH 2/5] vfio: introduce the VFIO_DMA_MAP_FLAG_NOEXEC flag 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 <a.motakis@...tualopensystems.com> --- 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 @@ -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) */ -- 2.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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