From: Daniel Thompson <daniel.thompson@linaro.org>
To: Douglas Anderson <dianders@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Sumit Garg <sumit.garg@linaro.org>,
Marc Zyngier <maz@kernel.org>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Ard Biesheuvel <ardb@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
kgdb-bugreport@lists.sourceforge.net,
Lecopzer Chen <lecopzer.chen@mediatek.com>,
linux-perf-users@vger.kernel.org,
Masayoshi Mizuma <msys.mizuma@gmail.com>,
Chen-Yu Tsai <wens@csie.org>,
linux-arm-kernel@lists.infradead.org, ito-yuichi@fujitsu.com,
Stephen Boyd <swboyd@chromium.org>,
Peter Zijlstra <peterz@infradead.org>,
D Scott Phillips <scott@os.amperecomputing.com>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Valentin Schneider <vschneid@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v11 6/6] arm64: kgdb: Implement kgdb_roundup_cpus() to enable pseudo-NMI roundup
Date: Fri, 25 Aug 2023 12:20:53 +0100 [thread overview]
Message-ID: <20230825112053.GE270740@aspen.lan> (raw)
In-Reply-To: <20230824083012.v11.6.I2ef26d1b3bfbed2d10a281942b0da7d9854de05e@changeid>
On Thu, Aug 24, 2023 at 08:30:32AM -0700, Douglas Anderson wrote:
> Up until now we've been using the generic (weak) implementation for
> kgdb_roundup_cpus() when using kgdb on arm64. Let's move to a custom
> one. The advantage here is that, when pseudo-NMI is enabled on a
> device, we'll be able to round up CPUs using pseudo-NMI. This allows
> us to debug CPUs that are stuck with interrupts disabled. If
> pseudo-NMIs are not enabled then we'll fallback to just using an IPI,
> which is still slightly better than the generic implementation since
> it avoids the potential situation described in the generic
> kgdb_call_nmi_hook().
>
> Co-developed-by: Sumit Garg <sumit.garg@linaro.org>
> Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
From a kgdb point of view:
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Daniel.
next prev parent reply other threads:[~2023-08-25 11:22 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-24 15:30 [PATCH v11 0/6] arm64: Add IPI for backtraces / kgdb; try to use NMI for some IPIs Douglas Anderson
2023-08-24 15:30 ` [PATCH v11 1/6] irqchip/gic-v3: Enable support for SGIs to act as NMIs Douglas Anderson
2023-08-26 10:36 ` Marc Zyngier
2023-08-28 15:35 ` Doug Anderson
2023-08-29 10:36 ` Sumit Garg
2023-08-24 15:30 ` [PATCH v11 2/6] arm64: idle: Tag the arm64 idle functions as __cpuidle Douglas Anderson
2023-08-29 10:38 ` Sumit Garg
2023-08-24 15:30 ` [PATCH v11 3/6] arm64: smp: Remove dedicated wakeup IPI Douglas Anderson
2023-08-25 22:17 ` Stephen Boyd
2023-08-29 10:41 ` Sumit Garg
2023-08-24 15:30 ` [PATCH v11 4/6] arm64: smp: Add arch support for backtrace using pseudo-NMI Douglas Anderson
2023-08-25 22:27 ` Stephen Boyd
2023-08-25 23:02 ` Doug Anderson
2023-08-25 23:23 ` Stephen Boyd
2023-08-29 5:23 ` Tomohiro Misono (Fujitsu)
2023-08-29 16:03 ` Doug Anderson
2023-08-24 15:30 ` [PATCH v11 5/6] arm64: smp: IPI_CPU_STOP and IPI_CPU_CRASH_STOP should try for NMI Douglas Anderson
2023-08-29 5:30 ` Tomohiro Misono (Fujitsu)
2023-08-29 10:42 ` Sumit Garg
2023-08-24 15:30 ` [PATCH v11 6/6] arm64: kgdb: Implement kgdb_roundup_cpus() to enable pseudo-NMI roundup Douglas Anderson
2023-08-25 11:20 ` Daniel Thompson [this message]
2023-08-25 22:28 ` Stephen Boyd
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