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c03ab9e32a
Implement primitives necessary for the 4th level folding, add walks of p4d level where appropriate, remove usage of __ARCH_USE_5LEVEL_HACK and replace 5level-fixup.h with pgtable-nop4d.h Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: James Morse <james.morse@arm.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Julien Thierry <julien.thierry.kdev@gmail.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200414153455.21744-6-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_IA64_PGALLOC_H
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#define _ASM_IA64_PGALLOC_H
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/*
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* This file contains the functions and defines necessary to allocate
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* page tables.
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*
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* This hopefully works with any (fixed) ia-64 page-size, as defined
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* in <asm/page.h> (currently 8192).
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*
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* Copyright (C) 1998-2001 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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* Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com>
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*/
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#include <linux/compiler.h>
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#include <linux/mm.h>
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#include <linux/page-flags.h>
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#include <linux/threads.h>
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#include <asm-generic/pgalloc.h>
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#include <asm/mmu_context.h>
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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return (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
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}
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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{
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free_page((unsigned long)pgd);
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}
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#if CONFIG_PGTABLE_LEVELS == 4
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static inline void
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p4d_populate(struct mm_struct *mm, p4d_t * p4d_entry, pud_t * pud)
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{
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p4d_val(*p4d_entry) = __pa(pud);
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}
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static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
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{
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return (pud_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
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}
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static inline void pud_free(struct mm_struct *mm, pud_t *pud)
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{
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free_page((unsigned long)pud);
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}
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#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud)
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#endif /* CONFIG_PGTABLE_LEVELS == 4 */
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static inline void
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pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
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{
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pud_val(*pud_entry) = __pa(pmd);
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}
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
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{
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return (pmd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
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}
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static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
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{
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free_page((unsigned long)pmd);
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}
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#define __pmd_free_tlb(tlb, pmd, address) pmd_free((tlb)->mm, pmd)
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static inline void
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pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
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{
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pmd_val(*pmd_entry) = page_to_phys(pte);
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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static inline void
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pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
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{
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pmd_val(*pmd_entry) = __pa(pte);
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}
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#define __pte_free_tlb(tlb, pte, address) pte_free((tlb)->mm, pte)
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#endif /* _ASM_IA64_PGALLOC_H */
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