On Tue, Apr 16, 2019 at 06:30:24PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> For now it always returns '0' (false), but once the iommu work is in
> place to enable per-process pagetables we can update the value returned.
>
> Userspace needs to know this to make an informed decision about exposing
> KHR_robustness.
>
> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Reviewed-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/adreno/adreno_gpu.c | 3 +++
> include/uapi/drm/msm_drm.h | 1 +
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> index 2cfee1a4fe0b..fbdf6f1c247e 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -62,6 +62,9 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
> case MSM_PARAM_NR_RINGS:
> *value = gpu->nr_rings;
> return 0;
> + case MSM_PARAM_PP_PGTABLE:
> + *value = 0;
> + return 0;
> default:
> DBG("%s: invalid param: %u", gpu->name, param);
> return -EINVAL;
> diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
> index 91a16b333c69..a9fdcf1689ce 100644
> --- a/include/uapi/drm/msm_drm.h
> +++ b/include/uapi/drm/msm_drm.h
> @@ -74,6 +74,7 @@ struct drm_msm_timespec {
> #define MSM_PARAM_TIMESTAMP 0x05
> #define MSM_PARAM_GMEM_BASE 0x06
> #define MSM_PARAM_NR_RINGS 0x07
> +#define MSM_PARAM_PP_PGTABLE 0x08 /* => 1 for per-process pagetables, else 0 */
>
> struct drm_msm_param {
> __u32 pipe; /* in, MSM_PIPE_x */
> --
> 2.20.1
>
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