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[34.85.247.235]) by smtp.gmail.com with ESMTPSA id 00721157ae682-719532c7e4fsm30482117b3.72.2025.07.23.07.47.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Jul 2025 07:47:30 -0700 (PDT) From: Pasha Tatashin To: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com, changyuanl@google.com, pasha.tatashin@soleen.com, rppt@kernel.org, dmatlack@google.com, rientjes@google.com, corbet@lwn.net, rdunlap@infradead.org, ilpo.jarvinen@linux.intel.com, kanie@linux.alibaba.com, ojeda@kernel.org, aliceryhl@google.com, masahiroy@kernel.org, akpm@linux-foundation.org, tj@kernel.org, yoann.congal@smile.fr, mmaurer@google.com, roman.gushchin@linux.dev, chenridong@huawei.com, axboe@kernel.dk, mark.rutland@arm.com, jannh@google.com, vincent.guittot@linaro.org, hannes@cmpxchg.org, dan.j.williams@intel.com, david@redhat.com, joel.granados@kernel.org, rostedt@goodmis.org, anna.schumaker@oracle.com, song@kernel.org, zhangguopeng@kylinos.cn, linux@weissschuh.net, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, gregkh@linuxfoundation.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, rafael@kernel.org, dakr@kernel.org, bartosz.golaszewski@linaro.org, cw00.choi@samsung.com, myungjoo.ham@samsung.com, yesanishhere@gmail.com, Jonathan.Cameron@huawei.com, quic_zijuhu@quicinc.com, aleksander.lobakin@intel.com, ira.weiny@intel.com, andriy.shevchenko@linux.intel.com, leon@kernel.org, lukas@wunner.de, bhelgaas@google.com, wagi@kernel.org, djeffery@redhat.com, stuart.w.hayes@gmail.com, ptyadav@amazon.de, lennart@poettering.net, brauner@kernel.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, saeedm@nvidia.com, ajayachandra@nvidia.com, jgg@nvidia.com, parav@nvidia.com, leonro@nvidia.com, witu@nvidia.com Subject: [PATCH v2 18/32] reboot: call liveupdate_reboot() before kexec Date: Wed, 23 Jul 2025 14:46:31 +0000 Message-ID: <20250723144649.1696299-19-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.50.0.727.gbf7dc18ff4-goog In-Reply-To: <20250723144649.1696299-1-pasha.tatashin@soleen.com> References: <20250723144649.1696299-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 45ED6C0011 X-Stat-Signature: 9ojcsdugyqt8cf4g1ucc7w3kxijmynr1 X-HE-Tag: 1753282052-19327 X-HE-Meta: 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 r9jrpYLO 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Modify the reboot() syscall handler in kernel/reboot.c to call liveupdate_reboot() when processing the LINUX_REBOOT_CMD_KEXEC command. This ensures that the Live Update Orchestrator is notified just before the kernel executes the kexec jump. The liveupdate_reboot() function triggers the final LIVEUPDATE_FREEZE event, allowing participating subsystems to perform last-minute state saving within the blackout window, and transitions the LUO state machine to FROZEN. The call is placed immediately before kernel_kexec() to ensure LUO finalization happens at the latest possible moment before the kernel transition. If liveupdate_reboot() returns an error (indicating a failure during LUO finalization), the kexec operation is aborted to prevent proceeding with an inconsistent state. Signed-off-by: Pasha Tatashin --- kernel/reboot.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/reboot.c b/kernel/reboot.c index ec087827c85c..bdeb04a773db 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -797,6 +798,9 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd, #ifdef CONFIG_KEXEC_CORE case LINUX_REBOOT_CMD_KEXEC: + ret = liveupdate_reboot(); + if (ret) + break; ret = kernel_kexec(); break; #endif -- 2.50.0.727.gbf7dc18ff4-goog