linux-kernel - [PATCH v2 06/12] reboot: indicate whether it is a HARDWARE PROTECTION reboot or shutdown

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Message-Id: <20250113-hw_protection-reboot-v2-6-161d3fc734f0@pengutronix.de>
Date: Mon, 13 Jan 2025 17:25:31 +0100
From: Ahmad Fatoum <a.fatoum@...gutronix.de>
To: Andrew Morton <akpm@...ux-foundation.org>, 
 Daniel Lezcano <daniel.lezcano@...aro.org>, 
 Fabio Estevam <festevam@...x.de>, "Rafael J. Wysocki" <rafael@...nel.org>, 
 Zhang Rui <rui.zhang@...el.com>, Lukasz Luba <lukasz.luba@....com>, 
 Jonathan Corbet <corbet@....net>, Serge Hallyn <serge@...lyn.com>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Matti Vaittinen <mazziesaccount@...il.com>, 
 Benson Leung <bleung@...omium.org>, Tzung-Bi Shih <tzungbi@...nel.org>, 
 Guenter Roeck <groeck@...omium.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
 linux-doc@...r.kernel.org, linux-security-module@...r.kernel.org, 
 chrome-platform@...ts.linux.dev, devicetree@...r.kernel.org, 
 kernel@...gutronix.de, Ahmad Fatoum <a.fatoum@...gutronix.de>
Subject: [PATCH v2 06/12] reboot: indicate whether it is a HARDWARE
 PROTECTION reboot or shutdown

It currently depends on the caller, whether we attempt a hardware
protection shutdown (poweroff) or a reboot. A follow-up commit will make
this partially user-configurable, so it's a good idea to have the
emergency message clearly state whether the kernel is going for a reboot
or a shutdown.

Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>
---
 kernel/reboot.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/reboot.c b/kernel/reboot.c
index eee4f449181f0cf3662892f4001f9a3074ec4881..c0333b0a901f2cea7e39d1ac04c57bc9a5c9ba20 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -1027,7 +1027,8 @@ void __hw_protection_trigger(const char *reason, int ms_until_forced,
 {
 	static atomic_t allow_proceed = ATOMIC_INIT(1);

-	pr_emerg("HARDWARE PROTECTION shutdown (%s)\n", reason);
+	pr_emerg("HARDWARE PROTECTION %s (%s)\n",
+		 hw_protection_action_str(action), reason);

 	/* Shutdown should be initiated only once. */
 	if (!atomic_dec_and_test(&allow_proceed))

-- 
2.39.5