Re: [REGRESSION] applespi from 6.12 onwards

On 5/11/25 21:31, kobarity wrote:

Hi

I'm also experiencing this problem on my MacBookPro14,3.

Aditya Garg wrote:

quoted

Hi Jörg

Can you test the kernel here to see if this fixes your issue:

https://github.com/t2linux/T2-Debian-and-Ubuntu-Kernel/actions/runs/14944200356

Alternatively you can try compiling your own kernel with this patch:

https://lore.kernel.org/all/0-v1-c26553717e90+65f-iommu_vtd_ss_wo_jgg@nvidia.com/ (local)

As far as I have tried, this patch did not solve the problem.

By bisecting, I found that this problem was introduced by commit
2031c469f816 ("iommu/vt-d: Add support for static identity domain").
In fact, since this commit, it will panic at startup.  This panic was
fixed by commit 6e02a277f1db ("iommu/vt-d: Fix incorrect
pci_for_each_dma_alias() for non-PCI devices").  So I applied commit
6e02a277f1db on commit 2031c469f816 and confirmed that the keyboard
and touchpad is not working.

Have you tried to apply commit 64f792981e35 ("iommu/vt-d: Remove device
comparison in context_setup_pass_through_cb")?

I also found that I can workaround this problem by reverting only the
intel_iommu_attach_device() change in commit 2031c469f816 as in the
attached patch, but I'm not sure if this is a reasonable fix.

Thanks,
baolu