From: Mitchel Humpherys <mitchelh@codeaurora.org>
Date: Fri, 6 Jan 2017 13:28:08 +0000 (+0530)
Subject: iommu: add IOMMU_PRIV attribute
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=579b2a65d245c093d3e63845c320b9321f112b75;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

iommu: add IOMMU_PRIV attribute

Add the IOMMU_PRIV attribute, which is used to indicate privileged
mappings.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 0ff5111f6959..69e2417a2965 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 at higher
+ * privileged execution level and inaccessible at
+ * less privileged levels.
+ */
+#define IOMMU_PRIV	(1 << 5)
 
 struct iommu_ops;
 struct iommu_group;