linux-kernel - Re: [PATCH 0/2] scripts/gdb/symbols: make lx-symbols skip the s390 decompressor

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Message-ID: <aGKuIf0PV8CfITRp@li-008a6a4c-3549-11b2-a85c-c5cc2836eea2.ibm.com>
Date: Mon, 30 Jun 2025 17:32:49 +0200
From: Alexander Gordeev <agordeev@...ux.ibm.com>
To: Ilya Leoshkevich <iii@...ux.ibm.com>
Cc: Jan Kiszka <jan.kiszka@...mens.com>, Kieran Bingham <kbingham@...nel.org>,
        linux-kernel@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>
Subject: Re: [PATCH 0/2] scripts/gdb/symbols: make lx-symbols skip the s390
 decompressor

On Wed, Jun 25, 2025 at 05:36:50PM +0200, Ilya Leoshkevich wrote:
> Hi,
> 
> In order to debug the early s390 kernel boot, one has to skip the
> decompressor code, which requires some private scripts or memorized
> commands. This series makes it work out of the box with the lx-symbols
> command.
> 
> Patch 1 adds helper infrastructure to the s390 decompressor code; it is
> already acked by Heiko.
> 
> Patch 2 is the implementation; it would be great to have an Ack from
> one of the GDB scripts maintainers.
> 
> We would like to get this series via the s390 tree, if possible.
> 
> Best regards,
> Ilya
> 
> Ilya Leoshkevich (2):
>   s390/boot: Introduce jump_to_kernel() function
>   scripts/gdb/symbols: make lx-symbols skip the s390 decompressor
> 
>  arch/s390/boot/Makefile      |  2 +-
>  arch/s390/boot/boot.h        |  1 +
>  arch/s390/boot/ipl_data.c    |  9 ++++++++-
>  arch/s390/boot/startup.c     |  2 +-
>  arch/s390/boot/trampoline.S  |  9 +++++++++
>  scripts/gdb/linux/symbols.py | 26 ++++++++++++++++++++++++++
>  6 files changed, 46 insertions(+), 3 deletions(-)
>  create mode 100644 arch/s390/boot/trampoline.S

Tested-by: Alexander Gordeev <agordeev@...ux.ibm.com>

Thanks!