[PATCH] drm/amdgpu: fill the alignment for secure buffer

[Christian König]

Am 15.01.20 um 08:07 schrieb Huang Rui:
> The alignment should match the page size for secure buffer.

That is superfluous, buffer are aligned to a page size anyway.

Christian.

>
> Signed-off-by: Huang Rui <ray.huang at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> index f39012e..a03eead 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
> @@ -261,9 +261,10 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
>   		resv = vm->root.base.bo->tbo.base.resv;
>   	}
>   
> -	if (flags & AMDGPU_GEM_CREATE_ENCRYPTED) {
> -		/* XXX: pad out alignment to meet TMZ requirements */
> -	}
> +	/* TMZ requires the secure buffer to align with page size at least */
> +	if (flags & AMDGPU_GEM_CREATE_ENCRYPTED)
> +		args->in.alignment = roundup(args->in.alignment,
> +					     AMDGPU_GPU_PAGE_SIZE);
>   
>   	r = amdgpu_gem_object_create(adev, size, args->in.alignment,
>   				     (u32)(0xffffffff & args->in.domains),