Is there a way to override the VM size for KFD VMs only? Only they
depend on ATS, so only they need to be forced to be 48-bits.

On the other hand, it could be argued that a user who manually sets the
VM size with a module parameter knows what they're doing. So let them
break ATS.

Regards,
  Felix


Am 14.12.2017 um 17:45 schrieb Yong Zhao:
> Change-Id: Id522c1cbadb8c069720f4e64a31cff42cd014733
> Signed-off-by: Yong Zhao <yong.zhao-5C7GfCeVMHo@public.gmane.org>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> index 709587d..93500e6 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
> @@ -2534,7 +2534,7 @@ void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t vm_size,
>  	uint64_t tmp;
>  
>  	/* adjust vm size first */
> -	if (amdgpu_vm_size != -1) {
> +	if (amdgpu_vm_size != -1 && adev->asic_type != CHIP_RAVEN) {
>  		unsigned max_size = 1 << (max_bits - 30);
>  
>  		vm_size = amdgpu_vm_size;