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([2804:14c:485:4b61:bb17:c38c:aa6:be85]) by smtp.gmail.com with ESMTPSA id eg38-20020a05687098a600b001c4b473581fsm2519986oab.12.2023.09.15.18.49.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 18:49:43 -0700 (PDT) From: Fabio Estevam To: rafael@kernel.org Cc: daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com, linux-pm@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, Fabio Estevam Subject: [PATCH v8 2/3] reboot: Introduce hw_protection_reboot() Date: Fri, 15 Sep 2023 22:49:27 -0300 Message-Id: <20230916014928.2848737-2-festevam@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230916014928.2848737-1-festevam@gmail.com> References: <20230916014928.2848737-1-festevam@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net From: Fabio Estevam Introduce hw_protection_reboot() to trigger an emergency reboot. It is a counterpart of hw_protection_shutdown() with the difference that it will force a reboot instead of shutdown. The motivation for doing this is to allow the thermal subystem to trigger a reboot when the temperature reaches the critical temperature. Signed-off-by: Fabio Estevam --- Changes since v7: - None include/linux/reboot.h | 11 ++++++++++- kernel/reboot.c | 33 ++++++++++++++++++++------------- 2 files changed, 30 insertions(+), 14 deletions(-) diff --git a/include/linux/reboot.h b/include/linux/reboot.h index 2b6bb593be5b..b6d59c7a3377 100644 --- a/include/linux/reboot.h +++ b/include/linux/reboot.h @@ -174,7 +174,16 @@ void ctrl_alt_del(void); extern void orderly_poweroff(bool force); extern void orderly_reboot(void); -void hw_protection_shutdown(const char *reason, int ms_until_forced); +void __hw_protection_shutdown(const char *reason, int ms_until_forced, bool shutdown); +static inline void hw_protection_reboot(const char *reason, int ms_until_forced) +{ + __hw_protection_shutdown(reason, ms_until_forced, false); +} + +static inline void hw_protection_shutdown(const char *reason, int ms_until_forced) +{ + __hw_protection_shutdown(reason, ms_until_forced, true); +} /* * Emergency restart, callable from an interrupt handler. diff --git a/kernel/reboot.c b/kernel/reboot.c index 3bba88c7ffc6..76fa6e9e4f1d 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -953,21 +953,25 @@ static void hw_failure_emergency_poweroff(int poweroff_delay_ms) } /** - * hw_protection_shutdown - Trigger an emergency system poweroff + * __hw_protection_shutdown - Trigger an emergency system shutdown or reboot * - * @reason: Reason of emergency shutdown to be printed. - * @ms_until_forced: Time to wait for orderly shutdown before tiggering a - * forced shudown. Negative value disables the forced - * shutdown. + * @reason: Reason of emergency shutdown or reboot to be printed. + * @ms_until_forced: Time to wait for orderly shutdown or reboot before + * triggering it. Negative value disables the forced + * shutdown or reboot. + * @shutdown: If true, indicates that a shutdown will happen + * after the critical tempeature is reached. + * If false, indicates that a reboot will happen + * after the critical tempeature is reached. * - * Initiate an emergency system shutdown in order to protect hardware from - * further damage. Usage examples include a thermal protection or a voltage or - * current regulator failures. - * NOTE: The request is ignored if protection shutdown is already pending even - * if the previous request has given a large timeout for forced shutdown. + * Initiate an emergency system shutdown or reboot in order to protect + * hardware from further damage. Usage examples include a thermal protection. + * NOTE: The request is ignored if protection shutdown or reboot is already + * pending even if the previous request has given a large timeout for forced + * shutdown/reboot. * Can be called from any context. */ -void hw_protection_shutdown(const char *reason, int ms_until_forced) +void __hw_protection_shutdown(const char *reason, int ms_until_forced, bool shutdown) { static atomic_t allow_proceed = ATOMIC_INIT(1); @@ -982,9 +986,12 @@ void hw_protection_shutdown(const char *reason, int ms_until_forced) * orderly_poweroff failure */ hw_failure_emergency_poweroff(ms_until_forced); - orderly_poweroff(true); + if (shutdown) + orderly_poweroff(true); + else + orderly_reboot(); } -EXPORT_SYMBOL_GPL(hw_protection_shutdown); +EXPORT_SYMBOL_GPL(__hw_protection_shutdown); static int __init reboot_setup(char *str) {