[Nouveau] VFIO traceing + Nvidia Cards

[Graeme Brett Houston]

Hi i was looking to find out if there is any tools that can be used to 
capture guaranteed repeatable trases of Nvidia Registers using VFIO VGA 
pass through?


my understanding is envytools works on linux where i was thinking to get 
traces of what nvidia drivers/hardware are doing via VFIO pass through 
of the pci/pcie card, running windows doing a standard set of tests.


Also on such a setup what parameters would need to be sent to qemu and 
what extar compile settings would be used?


i have tried this with PowerVR card and get traces but don't think i get 
all the DMA activity however but as that is a separate 3d accelerator 
and i have not manged ot get old vga cards of that erra working in vfio 
pass through that explains that .


But i was thinking for RTX 4000 i could potentially grab register 
accesses as a trace but as i say recon would need a standard test 
process to follow.



Graeme Houston