Messages in this thread |  | | Date | Mon, 26 Jul 2021 14:25:39 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH v2] iommu/vt-d: Dump DMAR translation structure |
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On Wed, Jul 21, 2021 at 09:24:53PM -0700, Kyung Min Park wrote: > When the dmar translation fault happens, the kernel prints a single line > fault reason with corresponding hexadecimal code defined in the Intel VT-d > specification. > > Currently, when user wants to debug the translation fault in detail, > debugfs is used for dumping the dmar_translation_struct, which is not > available when the kernel failed to boot. > > Dump the DMAR translation structure, pagewalk the IO page table and print > the page table entry when the fault happens. > > Signed-off-by: Kyung Min Park <kyung.min.park@intel.com>
This is too much noise in dmesg for a single dmar fault. Please hide that additional debug information behind a debug kernel option for the VT-d driver.
Thanks,
Joerg
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