Re: [PATCH] iommu/vt-d: Dump DMAR translation structure

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

On 5/27/21 7:35 AM, 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>

Please fix below compile error:

ld: drivers/iommu/intel/dmar.o: in function `dmar_fault_do_one':
/home/allen/Workspace/iommu/drivers/iommu/intel/dmar.c:1965: undefined 
reference to `dmar_fault_dump_ptes'
make: *** [Makefile:1191: vmlinux] Error 1

Best regards,
baolu