linux-kernel - Re: [v2] powerpc/xmon: Also setup debugger hooks when single-stepping

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Message-Id: <40skql47Ddz9s28@ozlabs.org>
Date:   Fri, 25 May 2018 21:41:54 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Michal Suchanek <msuchanek@...e.de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Balbir Singh <bsingharora@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Breno Leitao <leitao@...ian.org>,
        Vaibhav Jain <vaibhav@...ux.vnet.ibm.com>,
        "Guilherme G. Piccoli" <gpiccoli@...ux.vnet.ibm.com>,
        Michal Suchanek <msuchanek@...e.de>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [v2] powerpc/xmon: Also setup debugger hooks when single-stepping

On Wed, 2018-05-23 at 18:00:54 UTC, Michal Suchanek wrote:
> When single-stepping kernel code from xmon without a debug hook enabled
> the kernel crashes. This can happen when kernel starts with xmon on
> crash disabled but xmon is entered using sysrq.
> 
> Call force_enable_xmon when single-stepping in xmon to install the xmon
> debug hooks.
> 
> Fixes: e1368d0c9edb ("powerpc/xmon: Setup debugger hooks when first
> break-point is set")
> 
> Signed-off-by: Michal Suchanek <msuchanek@...e.de>
> Reviewed-by: Vaibhav Jain <vaibhav@...ux.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/7daf59300999693b85233762b847f1

cheers