linux-kernel - Re: [RFC][PATCH v3 15/16] kmemdump: Add Kinfo backend driver

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Message-ID: <c0a0daf4-e9e3-4152-8e5e-c7b52a30dae9@linaro.org>
Date: Mon, 22 Sep 2025 11:01:51 +0100
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Eugen Hristev <eugen.hristev@...aro.org>, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-mm@...ck.org, tglx@...utronix.de,
 andersson@...nel.org, pmladek@...e.com, rdunlap@...radead.org,
 corbet@....net, david@...hat.com, mhocko@...e.com
Cc: mukesh.ojha@....qualcomm.com, linux-arm-kernel@...ts.infradead.org,
 linux-hardening@...r.kernel.org, jonechou@...gle.com, rostedt@...dmis.org,
 linux-doc@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [RFC][PATCH v3 15/16] kmemdump: Add Kinfo backend driver

Hi,

On 9/12/25 4:08 PM, Eugen Hristev wrote:
> Add Kinfo backend driver.
> This backend driver will select only regions of interest for the firmware,
> and it copy those into a shared memory area that is supplied via OF.
> The firmware is only interested in addresses for some symbols.
> The list format is kinfo-compatible, with devices like Google Pixel phone.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
> ---
>  MAINTAINERS               |   5 +
>  mm/kmemdump/Kconfig.debug |  13 ++
>  mm/kmemdump/Makefile      |   1 +
>  mm/kmemdump/kinfo.c       | 293 ++++++++++++++++++++++++++++++++++++++
>  4 files changed, 312 insertions(+)
>  create mode 100644 mm/kmemdump/kinfo.c

I tested the series on pixel 6 and I could see the backtraces correctly
decoded by the bootloader:

Tested-by: Tudor Ambarus <tudor.ambarus@...aro.org>

Thanks!