I wonder how much LAPSUS$ hack has to do with it.
I wonder if nvidia hardware programing interface is a mess like AMD one, just curious.
Probably zero.
1) There have been rumors about this for months
2) The hacks only happened very recently, this certainly would have taken longer to do than that.
Have a look at libdrm from the mesa project (the AMDGPU submodule), then it will give you pointers where to look into the kernel-DRM via the right IOCTLs.
Basically, the kernel code is initialization, quirks detection and restoration (firmware blobs are failing hard here), setting up of the various vram virtual address spaces (16 on latest GPUs) and the various circular buffers. The 3D/compute pipeline programing is done from userspace via those circular buffers.
If I am not too much mistaken, on lastest GPU "everything" should be in 1 PCIE 64bits bar (thx to bar size reprograming).
The challenge for AMD is to make all that dead simple and clean while keeping the extreme performance (GPU is all about performance). Heard rumors about near 0-driver hardware (namely "rdy" at power up).
Exactly the pointer I was looking for, thank you.
I doubt this is directly because of that.