From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: Re: [PATCHv7 01/26] iommu/arm-smmu: change IOMMU_EXEC to IOMMU_NOEXEC Date: Tue, 23 Sep 2014 16:14:10 -0600 Message-ID: <1411510450.24563.44.camel@ul30vt.home> References: <1411483586-29304-1-git-send-email-a.motakis@virtualopensystems.com> <1411483586-29304-2-git-send-email-a.motakis@virtualopensystems.com> <20140923145816.GE28608@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140923145816.GE28608-5wv7dgnIgG8@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Will Deacon Cc: Shuah Khan , "kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "eric.auger-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org" , Marc Zyngier , Greg Kroah-Hartman , open list , Thierry Reding , Alexey Kardashevskiy , "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" , "moderated list:ARM SMMU DRIVER" , Antonios Motakis , "tech-lrHrjnjw1UfHK3s98zE1ajGjJy/sRE9J@public.gmane.org" , "kvmarm-FPEHb7Xf0XXUo1n7N8X6UoWGPAHP3yOg@public.gmane.org" , "christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org" List-Id: iommu@lists.linux-foundation.org On Tue, 2014-09-23 at 15:58 +0100, Will Deacon wrote: > Hi Antonios, > > On Tue, Sep 23, 2014 at 03:46:00PM +0100, Antonios Motakis wrote: > > Exposing the XN flag of the SMMU driver as IOMMU_NOEXEC instead of > > IOMMU_EXEC makes it enforceable, since for IOMMUs that don't support > > the XN flag pages will always be executable. > > > > Signed-off-by: Antonios Motakis > > --- > > drivers/iommu/arm-smmu.c | 9 +++++---- > > include/linux/iommu.h | 2 +- > > 2 files changed, 6 insertions(+), 5 deletions(-) > > [...] > > > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > > index 20f9a52..e1a644c 100644 > > --- a/include/linux/iommu.h > > +++ b/include/linux/iommu.h > > @@ -27,7 +27,7 @@ > > #define IOMMU_READ (1 << 0) > > #define IOMMU_WRITE (1 << 1) > > #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ > > -#define IOMMU_EXEC (1 << 3) > > +#define IOMMU_NOEXEC (1 << 3) > > This hunk needs to be a separate patch merged by Joerg before I can take the > arm-smmu part (which looks fine). That separate hunk would be unbuildable since arm-smmu depends on the IOMMU_EXEC define. Patch 2/ is also in iommu code and gates patch 3/ in arm-smmu. The IOMMU-core changes are pretty trivial, so perhaps Joerg would be willing to ACK 1&2 and let Will include the first 3 patches through his tree. These first 3 patches should have been sent on their own since they're small an obvious so they don't get hung up on the reset of the series. Thanks, Alex