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b=ESB/PjWK+7S4hjQjB/73o85ozUTxNGJcqR0TnfzJKkNnd6UYrv4E7xJSc1bKO//Hn rkf4+WQvzyZf42O1qbYbMhUlmgr1W5deOzJJmZ5KUMYJKnnpWtoXVYXj+dtdZtyPoS xxrS1xZ9mP2EWgJcmiidxffyNNuo5GynD31uah5rmQUQHROrdjeqVIc3FwWbOt/y4s iE2aCm5GxutXvK/N4gExiTkv5wRs7xrv9DSKusBdgzQawHVWyUg7snClrfR+QAU+ip DJKYBZLvhsxN84M2YjXVI0YTj3dOCOF3l3zhtRrYrZmu6uDkut5NaVFPbagJucH2mt RrlQ9HWeLrLTw== Date: Tue, 10 Nov 2026 11:24:35 +0200 From: Mike Rapoport To: Pasha Tatashin Cc: Chen Pei , pjw@kernel.org, palmer@dabbelt.com, alex@ghiti.fr, pratyush@kernel.org, graf@amazon.com, shuah@kernel.org, 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: Re: [PATCH v3 2/4] riscv: Add support for kexec handover (KHO) Message-ID: References: <20261106071459.2003-1-cp0613@linux.alibaba.com> <20261106071459.2003-3-cp0613@linux.alibaba.com> <179415145358.358073.165272378597657083.b4-review@b4> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <179415145358.358073.165272378597657083.b4-review@b4> X-Stat-Signature: pth9u7swk37jpygwagnjtd85etyudazn X-Rspam-User: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS autolearn=unavailable autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 5B191140009 X-HE-Tag: 1794302683-339147 X-HE-Meta: U2FsdGVkX1/5k/Rvao0eRDfX604JJ0DeTOPuACJpzac6+vLNAWkHE7pVmwqRGFXJhJRnsPn+lTPeDqR8rvHkNq4odCeru0yKkmK8IcywrLDuB0CCUrqj/JjgL57BWsZeoR8tcIadiK2m+l8Yb2TYTF1KHz1kvb25gKGypAOAkrcrZ0PFNFsSKuohYqzr/Z302sxR6Ju3sP8UzRHYflRp8YW6lQGhCR6REGo2JxKW5iqiJjd3Zc8YnXi3poKWACWIn7EXAiFQoidPD8Ybcr7iXa8oFFBh1KPpdP1C6Ct+/5VMldW4YQ8fRV/FTzLeO1G/O+Sehle8MYtRqDnyhofhyAKf7j12lifZ2SuBgKcTsVO53iswvJCI/vpjonErmHEwWH1uYEj68+7bdaCZ/6S6ERIKPIGb1C5a8istlEhc7hQtKj1az+9xeIu1iB2fjcd9UFcHZC0UOGkPVHyDcmuxQsHojEcKCIifB+mAjn3l2wPVLeRRBLEnSouK+GQ1SYn17m2WuKVTtKKlAqZlPUI2xRF4mxfm4bGAzvDN749WhXDWNcQ6RtKXFOy1r3LLZA//uRw9PLEAjtcRFNCaQRHFtOKsrRml73PeuUzUVmweuT8LWg1ax8A+/VYO48EJr5evFAUTOQg08APXqJBPKHsLVuOZjlXZXOb9ossVqpnpHm3x8TJIHydJoUyTeJXN0M32boexm2w76y5g/b9ayLblxnLIbL7rKGRT2LnE/TnQh6pAn1BareaOVO7EF88K6g+xFiSuMtI9nnYWZ5xkbfYbjp/SEiTURd+YWOYTqV3yWPrabEVfPgnvqavO52AkUnqXLI3n0QpCpp/3c94BfgtiKXdZiwd0p+Zg9kh+aPG6Dn11Y7/Y07h0z5JSocBkOLTxynXAAz8voFuCfnvvE7Jb+dYo1UEBN97+SOusZDl8ynTwsVOVUUtd8JqTh2EnnRi0iO5Cg5rw+9vsnQyyrjZ j/Z4GcX3 gm1esSorKyXeZRa0gCcnsFDlv+Sag2sDYA/6x46mJCMxv4I6AXj+AImLh9gvaZfIfpTuy/4zRE9KtxUjAUMUTrGsiq7Qiv6eezef/uviJ1AMzhdReNnGcNQvquT2VCcp1l2lmWO700i9rxqBEi0MJ4ewx6m6pWBYYpwUXdoepS9mWSHjv+46IKX7aBYeBjTXpERM20gJUuaTC7oWPWOFwVBo73KJeaiLRwb2B1rhEe8fPzn3f8d5ondwisVBzD8DaqylRhC/b2E1gzgKOoY+3wWakD5D8ob0hsR9acQsZna6xLBFg3cbotOhaSHBRU9UQdwD79Wd1pM69H6qX/iZnM7s6iuWokLzanzdWxyoXIxX7wSXBYlgfiNIy2nLUrLtjgo4I 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 On Sun, Nov 08, 2026 at 10:24:13AM -0500, Pasha Tatashin wrote: > > 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 > > > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > > index e7891a2a89da..a5c56252ff44 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 > > Reviewed-by: Pasha Tatashin > > But pre-reqs. should be applied prior taking this series: > > 1. https://lore.kernel.org/all/20261023054518.3258350-1-gthelen@google.com I'm planning to send it to Linus this week. > 2. https://lore.kernel.org/all/20261104-kho-bootmem-sizing-v2-0-b0d1a834780f@kernel.org This is easy if we take it via liveupdate tree :) @ricsv folks, how do you prefer to play it? > -- > Pasha > -- Sincerely yours, Mike.