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Sat, 10 Jan 2026 23:45:13 -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 v5 1/2] sparc: Use vmemmap_populate_hugepages for vmemmap_populate Date: Sun, 11 Jan 2026 15:44:52 +0800 Message-ID: <20260111074453.66728-2-pilgrimtao@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260111074453.66728-1-pilgrimtao@gmail.com> References: <20260111074453.66728-1-pilgrimtao@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: zhdh9bd586k68a3my3846qewnixdjgza X-Rspamd-Queue-Id: C0D78C0002 X-Rspamd-Server: rspam04 X-HE-Tag: 1768117514-378135 X-HE-Meta: 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 6Za4rGK+ Jz2r1reszgnxbv5orzfu/XWpfQ2plZYaX70TUK2QECf7MMeqDNAN7z4OEhbH/2xkByNNUnUwKsJ31BM628s3zk41vPNoQ+NmcEGRvoFeD+fINUbdXmR0dOgTegnwgXlEM1gXpaHrWbngHum9+bOTa01BMNKyOx2SSdvr5tsC7PbJxB/YxnOkzhze9jwjVZ0WynLO4SRRZ5LpADit108a35mPY9bYBlPfJYWOdLT1/V4wsBbfZ6AavrckX46+qx14iD3NvxPXMgbIAbk3ZWmxq3UFMc0Oc7TY02TygMZ+/fu7uKKSJpL16VUWDvmuuzy5Njl1R9wo/Xrg9VsxzV+fgyFoNpSgQq9JLxN2ZhuDmDJKk1BvPpVe2Ntoj1S9VfZvmzA8W/qzL55fu0m34Id3TFm8ZpXkOTbRe9UBBTAiSOJ6RcOiMdna8ocOma8wLBIwNG3e4+CRR8QjmU7Y= 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 Acked-by: Mike Rapoport (Microsoft) --- 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)