Re: iommu=no-igfx

[buy computer <buycomputer40@xxxxxxxxx>]

On Thu, May 28, 2020 at 11:34 AM Tian, Kevin <kevin.tian@xxxxxxxxx> wrote:

You may search dma_map* in drivers/gpu/drm/i915, and then print mapped addresses to see any match in VT-d reported faulting addresses. For example, __setup_page_dma might be one example that you want to check.

Unfortunately, I'm not really clear on how to do that too. I've found drivers/gpu/drm/i915, and it contains one file, i915.ko. Using cat prints out unformatted text. How do I access this data? Internet searches have again come up dry for me, sorry if this question isn't on the level.