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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Mike Rapoport
e19f97ed67
The UML port uses 4 and 5 level fixups to support higher level page table directories in the generic VM code. Implement primitives necessary for the 4th level folding, add walks of p4d level where appropriate and drop usage of __ARCH_USE_5LEVEL_HACK. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport <[email protected]> Cc: Anatoly Pugachev <[email protected]> Cc: Anton Ivanov <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Greentime Hu <[email protected]> Cc: Greg Ungerer <[email protected]> Cc: Helge Deller <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Jeff Dike <[email protected]> Cc: "Kirill A. Shutemov" <[email protected]> Cc: Mark Salter <[email protected]> Cc: Matt Turner <[email protected]> Cc: Michal Simek <[email protected]> Cc: Peter Rosin <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rolf Eike Beer <[email protected]> Cc: Russell King <[email protected]> Cc: Russell King <[email protected]> Cc: Sam Creasey <[email protected]> Cc: Vincent Chen <[email protected]> Cc: Vineet Gupta <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike ([email protected])
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* Copyright 2003 PathScale, Inc.
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* Derived from include/asm-i386/pgtable.h
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*/
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#ifndef __UM_PGTABLE_2LEVEL_H
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#define __UM_PGTABLE_2LEVEL_H
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#include <asm-generic/pgtable-nopmd.h>
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/* PGDIR_SHIFT determines what a third-level page table entry can map */
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#define PGDIR_SHIFT 22
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#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE-1))
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/*
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* entries per page directory level: the i386 is two-level, so
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* we don't really have any PMD directory physically.
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*/
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#define PTRS_PER_PTE 1024
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#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
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#define PTRS_PER_PGD 1024
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#define FIRST_USER_ADDRESS 0UL
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#define pte_ERROR(e) \
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printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \
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pte_val(e))
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#define pgd_ERROR(e) \
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printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
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pgd_val(e))
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static inline int pgd_newpage(pgd_t pgd) { return 0; }
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static inline void pgd_mkuptodate(pgd_t pgd) { }
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#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
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#define pte_pfn(x) phys_to_pfn(pte_val(x))
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#define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
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#define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))
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#endif
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