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Date: Mon, 20 Oct 2014 15:29:43 -0600 From: Alex Williamson <alex.williamson@...hat.com> To: Antonios Motakis <a.motakis@...tualopensystems.com> Cc: kvmarm@...ts.cs.columbia.edu, iommu@...ts.linux-foundation.org, will.deacon@....com, tech@...tualopensystems.com, christoffer.dall@...aro.org, eric.auger@...aro.org, kim.phillips@...escale.com, marc.zyngier@....com, "open list:VFIO DRIVER" <kvm@...r.kernel.org>, "open list:ABI/API" <linux-api@...r.kernel.org>, open list <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/5] vfio: introduce the VFIO_DMA_MAP_FLAG_NOEXEC flag 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 <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 ^^ 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) */ -- 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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