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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <13351083-2929-046b-0538-4f760ee89571@linux.intel.com>
Date:   Wed, 9 Jun 2021 15:47:36 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Kyung Min Park <kyung.min.park@...el.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Cc:     baolu.lu@...ux.intel.com, dwmw2@...radead.org, joro@...tes.org,
        will@...nel.org, yian.chen@...el.com, sohil.mehta@...el.com,
        ravi.v.shankar@...el.com, ashok.raj@...el.com
Subject: Re: [PATCH] iommu/vt-d: Dump DMAR translation structure

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@...el.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