From mboxrd@z Thu Jan 1 00:00:00 1970 From: sricharan@codeaurora.org (Sricharan R) Date: Fri, 6 Jan 2017 18:58:08 +0530 Subject: [PATCH V9 1/9] iommu: add IOMMU_PRIV attribute In-Reply-To: <1483709296-32761-1-git-send-email-sricharan@codeaurora.org> References: <1483709296-32761-1-git-send-email-sricharan@codeaurora.org> Message-ID: <1483709296-32761-2-git-send-email-sricharan@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Mitchel Humpherys Add the IOMMU_PRIV attribute, which is used to indicate privileged mappings. Reviewed-by: Robin Murphy Tested-by: Robin Murphy Signed-off-by: Mitchel Humpherys Acked-by: Will Deacon --- include/linux/iommu.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 0ff5111..69e2417 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -31,6 +31,13 @@ #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ #define IOMMU_NOEXEC (1 << 3) #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */ +/* + * This is to make the IOMMU API setup privileged + * mapppings accessible by the master only@higher + * privileged execution level and inaccessible at + * less privileged levels. + */ +#define IOMMU_PRIV (1 << 5) struct iommu_ops; struct iommu_group; -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation