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Sat, 31 Jan 2026 22:35:49 -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 v6 1/2] sparc: Use vmemmap_populate_hugepages for vmemmap_populate Date: Sun, 1 Feb 2026 14:35:31 +0800 Message-ID: <20260201063532.44807-2-pilgrimtao@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260201063532.44807-1-pilgrimtao@gmail.com> References: <20260201063532.44807-1-pilgrimtao@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B009780004 X-Stat-Signature: 58h6gyoorf6oheqkx81aisndh57rkkdw X-Rspam-User: X-HE-Tag: 1769927750-989445 X-HE-Meta: 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 QiiVsFJs 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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: From: Chengkaitao 1. In the SPARC architecture, reimplement 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..f1981adc99ac 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, NULL); } #endif /* CONFIG_SPARSEMEM_VMEMMAP */ -- 2.50.1 (Apple Git-155)