[PATCH] drm/amdgpu: select ARCH_HAS_HMM and ZONE_DEVICE option

[Kuehling, Felix]

[+Jerome]

Why to we need ZONE_DEVICE. I didn't think this was needed for mirroring 
CPU page tables to device page tables.

ARCH_HAS_HMM depends on (X86_64 || PPC64). Do we have some alternative 
for ARM support?

Also, the name ARCH_HAS_HMM looks like it's meant to be selected by the 
CPU architecture rather than any driver. Jerome, do you have any advice?

Thanks,
   Felix

On 2019-02-20 1:56 p.m., Yang, Philip wrote:
> Those options are needed to support HMM
>
> Change-Id: Ieb7bb3bcec07245d79a02793e6728228decc400a
> Signed-off-by: Philip Yang <Philip.Yang at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/Kconfig | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig b/drivers/gpu/drm/amd/amdgpu/Kconfig
> index 960a63355705..63f0542bc34b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/Kconfig
> +++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
> @@ -26,7 +26,9 @@ config DRM_AMDGPU_CIK
>   config DRM_AMDGPU_USERPTR
>   	bool "Always enable userptr write support"
>   	depends on DRM_AMDGPU
> +	select ARCH_HAS_HMM
>   	select HMM_MIRROR
> +	select ZONE_DEVICE
>   	help
>   	  This option selects CONFIG_HMM and CONFIG_HMM_MIRROR if it
>   	  isn't already selected to enabled full userptr support.