diff options
| author | Rob Clark <robdclark@chromium.org> | 2020-08-17 09:23:09 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-17 13:55:46 +0200 |
| commit | 10cb6c2e406d46421f3bd6c7621083e6bca59aea (patch) | |
| tree | 911602abf562e69aaef438c1d742ab83c3e704c2 | |
| parent | a6915129ae9769a58415c6dcdf6db9650d170cd5 (diff) | |
drm/msm/gpu: make ringbuffer readonly
[ Upstream commit 352c83fb39cae3eff95a8e1ed23006291abb6196 ]
The GPU has no business writing into the ringbuffer, let's make it
readonly to the GPU.
Fixes: 7198e6b03155 ("drm/msm: add a3xx gpu support")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/msm/msm_ringbuffer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c index e397c44cc011..39ecb5a18431 100644 --- a/drivers/gpu/drm/msm/msm_ringbuffer.c +++ b/drivers/gpu/drm/msm/msm_ringbuffer.c @@ -27,7 +27,8 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id, ring->id = id; ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ, - MSM_BO_WC, gpu->aspace, &ring->bo, &ring->iova); + MSM_BO_WC | MSM_BO_GPU_READONLY, gpu->aspace, &ring->bo, + &ring->iova); if (IS_ERR(ring->start)) { ret = PTR_ERR(ring->start); |