[Intel-gfx] [PATCH 07/19] drm/i915: vma is always backed by an object.

[Maarten Lankhorst]

Op 31-08-2021 om 12:29 schreef Tvrtko Ursulin:
>
> On 31/08/2021 10:34, Maarten Lankhorst wrote:
>> Op 31-08-2021 om 11:18 schreef Tvrtko Ursulin:
>>>
>>> On 30/08/2021 13:09, Maarten Lankhorst wrote:
>>>> vma->obj and vma->resv are now never NULL, and some checks can be removed.
>>>
>>> Is the direction here compatible with SVM / VM_BIND?
>>
>>
>> Yeah, it should be. The changes here make the obj->resv->lock the main lock, so it should at least simplify locking for VM_BIND.
>
> Hm but what will vma->obj point to in case of SVM, when there is no GEM BO? 

Probably to one of the bo's in i915_vm, or a dummy bo that least shares the vm_resv object, similar to the aliasing gtt handling.