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22c4e80466
Patch series "mm/sparse-vmemmap: Generalise helpers and enable for LoongArch", v14. This series is in order to enable sparse-vmemmap for LoongArch. But LoongArch cannot use generic helpers directly because MIPS&LoongArch need to call pgd_init()/pud_init()/pmd_init() when populating page tables. So we adjust the prototypes of p?d_init() to make generic helpers can call them, then enable sparse-vmemmap with generic helpers, and to be further, generalise vmemmap_populate_hugepages() for ARM64, X86 and LoongArch. This patch (of 4): We are preparing to add sparse vmemmap support to LoongArch. MIPS and LoongArch need to call pgd_init()/pud_init()/pmd_init() when populating page tables, so adjust their prototypes to make generic helpers can call them. NIOS2 declares pmd_init() but doesn't use, just remove it to avoid build errors. Link: https://lkml.kernel.org/r/20221027125253.3458989-1-chenhuacai@loongson.cn Link: https://lkml.kernel.org/r/20221027125253.3458989-2-chenhuacai@loongson.cn Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Guo Ren <guoren@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Will Deacon <will@kernel.org> Cc: Xuefeng Li <lixuefeng@loongson.cn> Cc: Xuerui Wang <kernel@xen0n.name> Cc: Min Zhou <zhoumin@loongson.cn> Cc: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
89 lines
2 KiB
C
89 lines
2 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2003 by Ralf Baechle
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*/
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/memblock.h>
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#include <linux/highmem.h>
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#include <asm/fixmap.h>
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#include <asm/pgalloc.h>
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#include <asm/tlbflush.h>
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void pgd_init(void *addr)
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{
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unsigned long *p = (unsigned long *)addr;
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int i;
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for (i = 0; i < USER_PTRS_PER_PGD; i+=8) {
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p[i + 0] = (unsigned long) invalid_pte_table;
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p[i + 1] = (unsigned long) invalid_pte_table;
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p[i + 2] = (unsigned long) invalid_pte_table;
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p[i + 3] = (unsigned long) invalid_pte_table;
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p[i + 4] = (unsigned long) invalid_pte_table;
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p[i + 5] = (unsigned long) invalid_pte_table;
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p[i + 6] = (unsigned long) invalid_pte_table;
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p[i + 7] = (unsigned long) invalid_pte_table;
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}
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}
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#if defined(CONFIG_TRANSPARENT_HUGEPAGE)
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pmd_t mk_pmd(struct page *page, pgprot_t prot)
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{
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pmd_t pmd;
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pmd_val(pmd) = (page_to_pfn(page) << _PFN_SHIFT) | pgprot_val(prot);
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return pmd;
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}
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void set_pmd_at(struct mm_struct *mm, unsigned long addr,
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pmd_t *pmdp, pmd_t pmd)
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{
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*pmdp = pmd;
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}
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#endif /* defined(CONFIG_TRANSPARENT_HUGEPAGE) */
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void __init pagetable_init(void)
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{
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unsigned long vaddr;
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pgd_t *pgd_base;
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#ifdef CONFIG_HIGHMEM
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pgd_t *pgd;
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p4d_t *p4d;
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pud_t *pud;
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pmd_t *pmd;
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pte_t *pte;
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#endif
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/* Initialize the entire pgd. */
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pgd_init(swapper_pg_dir);
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pgd_init(&swapper_pg_dir[USER_PTRS_PER_PGD]);
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pgd_base = swapper_pg_dir;
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/*
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* Fixed mappings:
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*/
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vaddr = __fix_to_virt(__end_of_fixed_addresses - 1);
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fixrange_init(vaddr & PMD_MASK, vaddr + FIXADDR_SIZE, pgd_base);
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#ifdef CONFIG_HIGHMEM
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/*
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* Permanent kmaps:
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*/
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vaddr = PKMAP_BASE;
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fixrange_init(vaddr & PMD_MASK, vaddr + PAGE_SIZE*LAST_PKMAP, pgd_base);
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pgd = swapper_pg_dir + pgd_index(vaddr);
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p4d = p4d_offset(pgd, vaddr);
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pud = pud_offset(p4d, vaddr);
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pmd = pmd_offset(pud, vaddr);
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pte = pte_offset_kernel(pmd, vaddr);
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pkmap_page_table = pte;
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#endif
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}
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