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Fri, 19 Dec 2025 03:58:35 -0800 (PST) From: chengkaitao To: davem@davemloft.net, andreas@gaisler.com, akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com Cc: kevin.brodsky@arm.com, dave.hansen@linux.intel.com, ziy@nvidia.com, chengkaitao@kylinos.cn, willy@infradead.org, zhengqi.arch@bytedance.com, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v4 1/3] sparc: Use vmemmap_populate_hugepages for vmemmap_populate Date: Fri, 19 Dec 2025 19:58:10 +0800 Message-ID: <20251219115812.65855-2-pilgrimtao@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251219115812.65855-1-pilgrimtao@gmail.com> References: <20251219115812.65855-1-pilgrimtao@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: DDE1B20010 X-Stat-Signature: shogcmb9aqrfarz74gyr4sytg6bnukeg X-Rspam-User: X-HE-Tag: 1766145516-86357 X-HE-Meta: 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 TA7s9Gmi Lhzg8Y/VoaZc2uBjY6LUHm+J0Mt5Vclobi18566BlhWlbz/xPjWCUeOgIxar2WxU0PIPYiLpgXLrSlvYD9ooTv9ugnBofRxZF2Rk1zd2JFzRBJHi44TkoaIQqcXEBvSgo3IouTPgScOsRc7G8W9Y5DCbuqDYtuRcBtGlI6j8Hcaf9jduCghEIOal17eDQvM4OX3OIGRfTSmLfXqJJwZD2yOK297ulf6ynEILRt9b5sXEibLMnXc+Bp3btlFVPpgXuz0dCUvLDnVVYw/upSpkYxIxe26a0sRVBgQ8mRB5L6U/yj4xrizos05g7jd3yvUwLGbGe3qikJGajrPAkQauWQmybokhhSuT2F/odKPPyey5pMl7/2rkkZpqjvEyfM79TZ36NR4UtDmjKaAJEO+R5Wd9mMCHXtgaopY9k1auTv1C/6bvQPqAgcYEaPQ== 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: From: Chengkaitao 1. In the SPARC architecture, reimplemented vmemmap_populate using vmemmap_populate_hugepages. 2. Allow the SPARC arch to fallback to vmemmap_populate_basepages(), when vmemmap_alloc_block returns NULL. Signed-off-by: Chengkaitao --- arch/sparc/mm/init_64.c | 47 ++++++++++++++--------------------------- 1 file changed, 16 insertions(+), 31 deletions(-) diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index df9f7c444c39..858eaa6615ea 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -2581,8 +2581,8 @@ unsigned long _PAGE_CACHE __read_mostly; EXPORT_SYMBOL(_PAGE_CACHE); #ifdef CONFIG_SPARSEMEM_VMEMMAP -int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend, - int node, struct vmem_altmap *altmap) +void __meminit vmemmap_set_pmd(pmd_t *pmd, void *p, int node, + unsigned long addr, unsigned long next) { unsigned long pte_base; @@ -2595,39 +2595,24 @@ int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend, pte_base |= _PAGE_PMD_HUGE; - vstart = vstart & PMD_MASK; - vend = ALIGN(vend, PMD_SIZE); - for (; vstart < vend; vstart += PMD_SIZE) { - pgd_t *pgd = vmemmap_pgd_populate(vstart, node); - unsigned long pte; - p4d_t *p4d; - pud_t *pud; - pmd_t *pmd; - - if (!pgd) - return -ENOMEM; - - p4d = vmemmap_p4d_populate(pgd, vstart, node); - if (!p4d) - return -ENOMEM; - - pud = vmemmap_pud_populate(p4d, vstart, node); - if (!pud) - return -ENOMEM; + pmd_val(*pmd) = pte_base | __pa(p); +} - pmd = pmd_offset(pud, vstart); - pte = pmd_val(*pmd); - if (!(pte & _PAGE_VALID)) { - void *block = vmemmap_alloc_block(PMD_SIZE, node); +int __meminit vmemmap_check_pmd(pmd_t *pmdp, int node, + unsigned long addr, unsigned long next) +{ + int large = pmd_leaf(*pmdp); - if (!block) - return -ENOMEM; + if (large) + vmemmap_verify((pte_t *)pmdp, node, addr, next); - pmd_val(*pmd) = pte_base | __pa(block); - } - } + return large; +} - return 0; +int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend, + int node, struct vmem_altmap *altmap) +{ + return vmemmap_populate_hugepages(vstart, vend, node, altmap); } #endif /* CONFIG_SPARSEMEM_VMEMMAP */ -- 2.50.1 (Apple Git-155)