From 407efd4e1c43ed7f306564a84ea1d5bff888a251 Mon Sep 17 00:00:00 2001
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Thu, 17 Apr 2014 10:05:21 -0600
Subject: [PATCH] msm: kgsl: Mark the IOMMU setstate memory as read only

Mark the IOMMU setstate memory as read only in the pagetable.

Change-Id: Ic0dedbadb19e499c749cd744c3e89be3bcb4c2a2
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---
 drivers/gpu/msm/kgsl_mmu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/msm/kgsl_mmu.c b/drivers/gpu/msm/kgsl_mmu.c
index 6b04aadb9a03..5ddc46b3c57b 100644
--- a/drivers/gpu/msm/kgsl_mmu.c
+++ b/drivers/gpu/msm/kgsl_mmu.c
@@ -385,6 +385,10 @@ int kgsl_mmu_init(struct kgsl_device *device)
 	status = kgsl_allocate_contiguous(&mmu->setstate_memory, PAGE_SIZE);
 	if (status)
 		return status;
+
+	/* Mark the setstate memory as read only */
+	mmu->setstate_memory.flags |= KGSL_MEMFLAGS_GPUREADONLY;
+
 	kgsl_sharedmem_set(device, &mmu->setstate_memory, 0, 0,
 				mmu->setstate_memory.size);
 
-- 
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