linux-kernel - Re: [PATCH] arm64: Call debug_traps_init() from trap

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Date:   Tue, 19 May 2020 00:04:04 +0100
From:   Will Deacon <will@...nel.org>
To:     Daniel Thompson <daniel.thompson@...aro.org>,
        Douglas Anderson <dianders@...omium.org>,
        Jason Wessel <jason.wessel@...driver.com>
Cc:     catalin.marinas@....com, Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Zenghui Yu <yuzenghui@...wei.com>, sumit.garg@...aro.org,
        Allison Randal <allison@...utok.net>,
        linux-kernel@...r.kernel.org, James Morse <james.morse@....com>,
        kgdb-bugreport@...ts.sourceforge.net,
        Enrico Weigelt <info@...ux.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        jinho lim <jordan.lim@...sung.com>,
        Dave Martin <Dave.Martin@....com>,
        Alexios Zavras <alexios.zavras@...el.com>, liwei391@...wei.com,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] arm64: Call debug_traps_init() from trap_init() to help early kgdb

On Wed, 13 May 2020 16:06:37 -0700, Douglas Anderson wrote:
> A new kgdb feature will soon land (kgdb_earlycon) that lets us run
> kgdb much earlier.  In order for everything to work properly it's
> important that the break hook is setup by the time we process
> "kgdbwait".
> 
> Right now the break hook is setup in debug_traps_init() and that's
> called from arch_initcall().  That's a bit too late since
> kgdb_earlycon really needs things to be setup by the time the system
> calls dbg_late_init().
> 
> [...]

Applied to arm64 (for-next/misc), thanks!

[1/1] arm64: Call debug_traps_init() from trap_init() to help early kgdb
      https://git.kernel.org/arm64/c/b322c65f8ca3

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev