[PATCH v3] drm/amdgpu: Verify root PD is mapped into kernel address space.

[Zhang, Jerry (Junwei)]

On 07/07/2018 05:21 PM, Christian König wrote:
> Am 06.07.2018 um 22:12 schrieb Andrey Grodzovsky:
>> Problem: When PD/PT update made by CPU root PD was not yet mapped causing
>> page fault.
>>
>> Fix: Verify root PD is mapped into CPU address space.
>>
>> v2:
>> Make sure that we add the root PD to the relocated list
>> since then it's get mapped into CPU address space bt default
>> in amdgpu_vm_update_directories.
>>
>> v3:
>> Drop change to not move kernel type BOs to evicted list.
>>
>> Link: https://bugs.freedesktop.org/show_bug.cgi?id=107065
>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>>
>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>
> Double Signed-off-by line, but apart of that Reviewed-by: Christian König <christian.koenig at amd.com>.

Same comment as Christian's

Now that's really much more cleaner:)

Well, we may also remove the redundant code in amdgpu_vm_alloc_levels() meanwhile.
{{{
   amdgpu_vm_bo_base_init(&entry->base, vm, pt);
- list_move(&entry->base.vm_status, &vm->relocated);
}}}

Apart from that, it's
Reviewed-by: Junwei Zhang <Jerry.Zhang at amd.com>

Jerry

>
> Regards,
> Christian.
>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>> index d18f247..316a501 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
>> @@ -156,6 +156,9 @@ static void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
>>           return;
>>       list_add_tail(&base->bo_list, &bo->va);
>> +    if (bo->tbo.type == ttm_bo_type_kernel)
>> +        list_move(&base->vm_status, &vm->relocated);
>> +
>>       if (bo->tbo.resv != vm->root.base.bo->tbo.resv)
>>           return;
>
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