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Received: from DESKTOP-S9E58SO.localdomain(mailfrom:cp0613@linux.alibaba.com fp:SMTPD_---0XEAtjN9_1793949304 cluster:ay36) by smtp.aliyun-inc.com; Fri, 06 Nov 2026 15:15:05 +0800 From: Chen Pei To: pjw@kernel.org, palmer@dabbelt.com, alex@ghiti.fr, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, graf@amazon.com, shuah@kernel.org Cc: guoren@kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, kexec@lists.infradead.org Subject: [PATCH v3 2/4] riscv: Add support for kexec handover (KHO) Date: Fri, 6 Nov 2026 15:14:57 +0800 Message-ID: <20261106071459.2003-3-cp0613@linux.alibaba.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261106071459.2003-1-cp0613@linux.alibaba.com> References: <20261106071459.2003-1-cp0613@linux.alibaba.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: B7DAC100004 X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=4.0.1 X-Stat-Signature: utbdpme5cqt5oywzu3j6gw6h955uc1nt X-HE-Tag: 1793949308-173707 X-HE-Meta: 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 Zw5CvbFh 55jXgmkD08o2sMN1l0gmi5DB2FZz2OKrvGDywmAxTp5+cgywkCZQkO7R1J1W7b2hyxuWRmezg3MVAUKYCdXJkw9Bb/sBorq04UebvPpWuSfDErCOc52nKwFVzgi5wDqknergldS/LBLd4q/YsVb1KnKGE2sehcWCZXr9RZGmkqcCKTXncoqL/A+/Q7gRjDyEZ1MkYNin5/W2RfynyONQs2FBIb8j59fI7JFsvRtGxik1ZnOE/KB5ErVdaIZ21RlUrQu0U Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 The generic handover paths are already in place on RISC-V: the outgoing kernel publishes the handover FDT and the bootmem list in /chosen of the DTB built by of_kexec_alloc_and_setup_fdt(), and the incoming kernel picks both up while scanning that node. Only the architecture symbol is missing. Set it to 64BIT && MMU: ARCH_SUPPORTS_KEXEC_FILE is already 64BIT only, and KEXEC_HANDOVER selects CMA, which depends on MMU. Signed-off-by: Chen Pei --- arch/riscv/Kconfig | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index bde1f1885038..bffef6b903e1 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -1125,6 +1125,9 @@ config ARCH_SELECTS_KEXEC_FILE config ARCH_SUPPORTS_KEXEC_PURGATORY def_bool ARCH_SUPPORTS_KEXEC_FILE +config ARCH_SUPPORTS_KEXEC_HANDOVER + def_bool 64BIT && MMU + config ARCH_SUPPORTS_CRASH_DUMP def_bool y -- 2.50.1