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 at amd.com>
> ---
> 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;
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