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From 271c81256612b162a9ae0f8c0f0a055a7523cea5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Wed, 13 May 2015 14:30:53 +0200
Subject: [PATCH 0214/1050] drm/amdgpu: enforce AMDGPU_GEM_CREATE_NO_CPU_ACCESS
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Deny user and kernel mapping if we said we never want to do so.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 3 ++-
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 3 +++
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 5fd0bc7..8dd843d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -316,7 +316,8 @@ int amdgpu_mode_dumb_mmap(struct drm_file *filp,
return -ENOENT;
}
robj = gem_to_amdgpu_bo(gobj);
- if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm)) {
+ if (amdgpu_ttm_tt_has_userptr(robj->tbo.ttm) ||
+ (robj->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
drm_gem_object_unreference_unlocked(gobj);
return -EPERM;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 992b7f5..a721f50 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -263,6 +263,9 @@ int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
bool is_iomem;
int r;
+ if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
+ return -EPERM;
+
if (bo->kptr) {
if (ptr) {
*ptr = bo->kptr;
--
1.9.1
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