[PATCH v10 04/13] iommu/arm-smmu-v3: Disable the EVTQ and the PRIQ in a kdump kernel
Jason Gunthorpe
jgg at nvidia.com
Wed Sep 23 09:39:16 PDT 2026
On Sun, 30 Aug 2026 16:18:05 -0700, Nicolin Chen <nicolinc at nvidia.com> wrote:
> A kdump kernel cannot use either queue. The crashed kernel's CDs and page
> tables might be corrupted, so events would spam the EVTQ, and there is no
> way to serve the page requests that would arrive at the PRIQ.
>
> The reset routine still enables both of the queues and then masks the two
> enable bits back out, having already programmed the queue bases and taken
> the interrupts of both.
>
> [...]
Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>
--
Jason
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