From patchwork Mon Aug 15 12:36:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huacai Chen X-Patchwork-Id: 12943498 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC853C25B06 for ; Mon, 15 Aug 2022 12:38:37 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 27F188D0002; Mon, 15 Aug 2022 08:38:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2073B6B0074; Mon, 15 Aug 2022 08:38:37 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 080928D0002; Mon, 15 Aug 2022 08:38:37 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id E71D16B0073 for ; Mon, 15 Aug 2022 08:38:36 -0400 (EDT) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id B3A721A04C0 for ; Mon, 15 Aug 2022 12:38:36 +0000 (UTC) X-FDA: 79801780632.16.39630AB Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf09.hostedemail.com (Postfix) with ESMTP id 36A4E1401BA for ; Mon, 15 Aug 2022 12:38:35 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7C325B80EA1; Mon, 15 Aug 2022 12:38:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0EDBCC433C1; Mon, 15 Aug 2022 12:38:27 +0000 (UTC) From: Huacai Chen To: Arnd Bergmann , Huacai Chen , Thomas Bogendoerfer , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Catalin Marinas , Will Deacon , Dinh Nguyen Cc: loongarch@lists.linux.dev, linux-arch@vger.kernel.org, Xuefeng Li , Guo Ren , Xuerui Wang , Jiaxun Yang , Andrew Morton , linux-mm@kvack.org, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Feiyang Chen , Min Zhou , Huacai Chen Subject: [PATCH V10 2/4] LoongArch: Add sparse memory vmemmap support Date: Mon, 15 Aug 2022 20:36:11 +0800 Message-Id: <20220815123613.3291770-3-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220815123613.3291770-1-chenhuacai@loongson.cn> References: <20220815123613.3291770-1-chenhuacai@loongson.cn> MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1660567116; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=D6+blrrW9/uo8rvL2HBTxHABLOWSqK73sWTKmhkDzYM=; b=yPfhPTFk2kqjE/dBccG3QwfVOW1nAPEiNNsAmxEUTQUBgDtCiuoHxjEgF1OyywbR8pjbGt nkUZTi6PwBqDiiCAN8wCpmz8TmvjNWSRz+444Q6waw7QM0sE1HP//uaSOnrPY1zLtYv4qX 0xKy0q+h00C2MOzvJxUU99dmEffUM3w= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf09.hostedemail.com: domain of "SRS0=QKQT=YT=loongson.cn=chenhuacai@kernel.org" designates 145.40.68.75 as permitted sender) smtp.mailfrom="SRS0=QKQT=YT=loongson.cn=chenhuacai@kernel.org" ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1660567116; a=rsa-sha256; cv=none; b=VeHCPjM1459sWcGvWJHr1Q3Go8s6I3gM2yeC9Tzi3UmpxQJmGli5vo4DQecUk51Uh3ycZD aCcU8yML7w0KH3P1nAlQ4/PAA3nLfO3Mx7ZT7N0hg9I2Tlh+MvpB1SKKqCnzDNk0wrWu1Q KTZUCHKAW8FJZshUrxzXWtZw8NLVxxY= X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 36A4E1401BA X-Rspam-User: X-Stat-Signature: uixa8webwbr1g7pxnpa4qk879auob4bk Authentication-Results: imf09.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf09.hostedemail.com: domain of "SRS0=QKQT=YT=loongson.cn=chenhuacai@kernel.org" designates 145.40.68.75 as permitted sender) smtp.mailfrom="SRS0=QKQT=YT=loongson.cn=chenhuacai@kernel.org" X-HE-Tag: 1660567115-446743 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: From: Feiyang Chen Add sparse memory vmemmap support for LoongArch. SPARSEMEM_VMEMMAP uses a virtually mapped memmap to optimise pfn_to_page and page_to_pfn operations. This is the most efficient option when sufficient kernel resources are available. Signed-off-by: Min Zhou Signed-off-by: Feiyang Chen Signed-off-by: Huacai Chen --- arch/loongarch/Kconfig | 1 + arch/loongarch/include/asm/pgtable.h | 7 ++- arch/loongarch/include/asm/sparsemem.h | 6 +++ arch/loongarch/mm/init.c | 73 +++++++++++++++++++++++++- include/linux/mm.h | 2 + mm/sparse-vmemmap.c | 10 ++++ 6 files changed, 97 insertions(+), 2 deletions(-) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 4abc9a28aba4..15e6aca2c930 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -419,6 +419,7 @@ config ARCH_FLATMEM_ENABLE config ARCH_SPARSEMEM_ENABLE def_bool y + select SPARSEMEM_VMEMMAP_ENABLE help Say Y to support efficient handling of sparse physical memory, for architectures which are either NUMA (Non-Uniform Memory Access) diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index 700ce735c101..fcab8c89b56b 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -11,6 +11,7 @@ #include #include +#include #include #if CONFIG_PGTABLE_LEVELS == 2 @@ -60,6 +61,7 @@ #include #include #include +#include struct mm_struct; struct vm_area_struct; @@ -87,7 +89,10 @@ extern unsigned long zero_page_mask; #define VMALLOC_START MODULES_END #define VMALLOC_END \ (vm_map_base + \ - min(PTRS_PER_PGD * PTRS_PER_PUD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, (1UL << cpu_vabits)) - PMD_SIZE) + min(PTRS_PER_PGD * PTRS_PER_PUD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, (1UL << cpu_vabits)) - PMD_SIZE - VMEMMAP_SIZE) + +#define vmemmap ((struct page *)((VMALLOC_END + PMD_SIZE) & PMD_MASK)) +#define VMEMMAP_END ((unsigned long)vmemmap + VMEMMAP_SIZE - 1) #define pte_ERROR(e) \ pr_err("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e)) diff --git a/arch/loongarch/include/asm/sparsemem.h b/arch/loongarch/include/asm/sparsemem.h index 3d18cdf1b069..ee55cdf933c6 100644 --- a/arch/loongarch/include/asm/sparsemem.h +++ b/arch/loongarch/include/asm/sparsemem.h @@ -11,6 +11,12 @@ #define SECTION_SIZE_BITS 29 /* 2^29 = Largest Huge Page Size */ #define MAX_PHYSMEM_BITS 48 +#ifndef CONFIG_SPARSEMEM_VMEMMAP +#define VMEMMAP_SIZE 0 +#else +#define VMEMMAP_SIZE (sizeof(struct page) * (1UL << (cpu_pabits + 1 - PAGE_SHIFT))) +#endif + #endif /* CONFIG_SPARSEMEM */ #ifdef CONFIG_MEMORY_HOTPLUG diff --git a/arch/loongarch/mm/init.c b/arch/loongarch/mm/init.c index 7094a68c9b83..78f71f9bf295 100644 --- a/arch/loongarch/mm/init.c +++ b/arch/loongarch/mm/init.c @@ -22,7 +22,7 @@ #include #include #include -#include +#include #include #include @@ -157,6 +157,77 @@ void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap) #endif #endif +#ifdef CONFIG_SPARSEMEM_VMEMMAP +static int __meminit vmemmap_populate_hugepages(unsigned long start, unsigned long end, + int node, struct vmem_altmap *altmap) +{ + unsigned long addr = start; + unsigned long next; + pgd_t *pgd; + p4d_t *p4d; + pud_t *pud; + pmd_t *pmd; + + for (addr = start; addr < end; addr = next) { + next = pmd_addr_end(addr, end); + + pgd = vmemmap_pgd_populate(addr, node); + if (!pgd) + return -ENOMEM; + p4d = vmemmap_p4d_populate(pgd, addr, node); + if (!p4d) + return -ENOMEM; + pud = vmemmap_pud_populate(p4d, addr, node); + if (!pud) + return -ENOMEM; + + pmd = pmd_offset(pud, addr); + if (pmd_none(*pmd)) { + void *p = NULL; + + p = vmemmap_alloc_block_buf(PMD_SIZE, node, NULL); + if (p) { + pmd_t entry; + + entry = pfn_pmd(virt_to_pfn(p), PAGE_KERNEL); + pmd_val(entry) |= _PAGE_HUGE | _PAGE_HGLOBAL; + set_pmd_at(&init_mm, addr, pmd, entry); + + continue; + } + } else if (pmd_val(*pmd) & _PAGE_HUGE) { + vmemmap_verify((pte_t *)pmd, node, addr, next); + continue; + } + if (vmemmap_populate_basepages(addr, next, node, NULL)) + return -ENOMEM; + } + + return 0; +} + +#if CONFIG_PGTABLE_LEVELS == 2 +int __meminit vmemmap_populate(unsigned long start, unsigned long end, + int node, struct vmem_altmap *altmap) +{ + return vmemmap_populate_basepages(start, end, node, NULL); +} +#else +int __meminit vmemmap_populate(unsigned long start, unsigned long end, + int node, struct vmem_altmap *altmap) +{ + return vmemmap_populate_hugepages(start, end, node, NULL); +} +#endif + +#ifdef CONFIG_MEMORY_HOTPLUG +void vmemmap_free(unsigned long start, unsigned long end, + struct vmem_altmap *altmap) +{ +} +#endif +#endif + /* * Align swapper_pg_dir in to 64K, allows its address to be loaded * with a single LUI instruction in the TLB handlers. If we used diff --git a/include/linux/mm.h b/include/linux/mm.h index 3bedc449c14d..4b05c1d007b5 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3146,6 +3146,8 @@ void *sparse_buffer_alloc(unsigned long size); struct page * __populate_section_memmap(unsigned long pfn, unsigned long nr_pages, int nid, struct vmem_altmap *altmap, struct dev_pagemap *pgmap); +void pmd_init(void *addr); +void pud_init(void *addr); pgd_t *vmemmap_pgd_populate(unsigned long addr, int node); p4d_t *vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node); pud_t *vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node); diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index 46ae542118c0..797b30e9050c 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -196,6 +196,10 @@ pmd_t * __meminit vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node) return pmd; } +void __weak __meminit pmd_init(void *addr) +{ +} + pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node) { pud_t *pud = pud_offset(p4d, addr); @@ -203,11 +207,16 @@ pud_t * __meminit vmemmap_pud_populate(p4d_t *p4d, unsigned long addr, int node) void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node); if (!p) return NULL; + pmd_init(p); pud_populate(&init_mm, pud, p); } return pud; } +void __weak __meminit pud_init(void *addr) +{ +} + p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node) { p4d_t *p4d = p4d_offset(pgd, addr); @@ -215,6 +224,7 @@ p4d_t * __meminit vmemmap_p4d_populate(pgd_t *pgd, unsigned long addr, int node) void *p = vmemmap_alloc_block_zero(PAGE_SIZE, node); if (!p) return NULL; + pud_init(p); p4d_populate(&init_mm, p4d, p); } return p4d;