Re: [REGRESSION] applespi from 6.12 onwards

[Baolu Lu <baolu.lu@linux.intel.com>]

On 5/11/25 21:31, kobarity wrote:
> 
> Hi
> 
> I'm also experiencing this problem on my MacBookPro14,3.
> 
> Aditya Garg wrote:
>>
>> 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/
> 
> 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