Messages in this thread | | | Date | Mon, 28 Apr 2014 20:37:10 +0100 | From | Will Deacon <> | Subject | Re: [RFC PATCH v5 02/11] ARM SMMU: Add capability IOMMU_CAP_DMA_EXEC |
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On Mon, Apr 28, 2014 at 04:52:42PM +0100, Antonios Motakis wrote: > The ARM SMMU can take an IOMMU_EXEC protection flag in addition to > IOMMU_READ and IOMMU_WRITE. Expose this as an IOMMU capability.
The other way of handling this would be to negate the capability and advertise a NOEXEC cap instead. That would need the IOMMU_EXEC flag to become IOMMU_NOEXEC and the ARM SMMU driver updating accordingly, but it might make more sense if people don't object to mixing positive and negative logic in the IOMMU_* flags.
Any thoughts?
Will
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