mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-29 13:23:23 +01:00
Rohan McLure
d7b4b67eb6
This reverts commit aa232204c4 ("mm/page_table_check: remove unused
parameter in [__]page_table_check_pte_clear").
Reinstate previously unused parameters for the purpose of supporting
powerpc platforms, as many do not encode user/kernel ownership of the page
in the pte, but instead in the address of the access.
[[email protected]: rebase, fix additional occurrence and loop handling]
Link: https://lkml.kernel.org/r/20251219-pgtable_check_v18rebase-v18-8-755bc151a50b@linux.ibm.com
Signed-off-by: Rohan McLure <[email protected]>
Signed-off-by: Andrew Donnellan <[email protected]>
Reviewed-by: Pasha Tatashin <[email protected]>
Acked-by: Ingo Molnar <[email protected]> # x86
Acked-by: Alexandre Ghiti <[email protected]> # riscv
Cc: Alexander Gordeev <[email protected]>
Cc: Alexandre Ghiti <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: "Christophe Leroy (CS GROUP)" <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Donet Tom <[email protected]>
Cc: Guo Weikang <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Kevin Brodsky <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Magnus Lindholm <[email protected]>
Cc: "Matthew Wilcox (Oracle)" <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Miehlbradt <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Qi Zheng <[email protected]>
Cc: "Ritesh Harjani (IBM)" <[email protected]>
Cc: Sweet Tea Dorminy <[email protected]>
Cc: Thomas Huth <[email protected]>
Cc: "Vishal Moola (Oracle)" <[email protected]>
Cc: Zi Yan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
167 lines
4.5 KiB
C
167 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2021, Google LLC.
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* Pasha Tatashin <[email protected]>
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*/
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#ifndef __LINUX_PAGE_TABLE_CHECK_H
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#define __LINUX_PAGE_TABLE_CHECK_H
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#ifdef CONFIG_PAGE_TABLE_CHECK
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#include <linux/jump_label.h>
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extern struct static_key_true page_table_check_disabled;
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extern struct page_ext_operations page_table_check_ops;
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void __page_table_check_zero(struct page *page, unsigned int order);
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void __page_table_check_pte_clear(struct mm_struct *mm, unsigned long addr,
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pte_t pte);
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void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr,
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pmd_t pmd);
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void __page_table_check_pud_clear(struct mm_struct *mm, unsigned long addr,
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pud_t pud);
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void __page_table_check_ptes_set(struct mm_struct *mm, unsigned long addr,
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pte_t *ptep, pte_t pte, unsigned int nr);
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void __page_table_check_pmds_set(struct mm_struct *mm, unsigned long addr,
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pmd_t *pmdp, pmd_t pmd, unsigned int nr);
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void __page_table_check_puds_set(struct mm_struct *mm, unsigned long addr,
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pud_t *pudp, pud_t pud, unsigned int nr);
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void __page_table_check_pte_clear_range(struct mm_struct *mm,
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unsigned long addr,
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pmd_t pmd);
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static inline void page_table_check_alloc(struct page *page, unsigned int order)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_zero(page, order);
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}
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static inline void page_table_check_free(struct page *page, unsigned int order)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_zero(page, order);
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}
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static inline void page_table_check_pte_clear(struct mm_struct *mm,
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unsigned long addr, pte_t pte)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_pte_clear(mm, addr, pte);
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}
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static inline void page_table_check_pmd_clear(struct mm_struct *mm,
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unsigned long addr, pmd_t pmd)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_pmd_clear(mm, addr, pmd);
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}
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static inline void page_table_check_pud_clear(struct mm_struct *mm,
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unsigned long addr, pud_t pud)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_pud_clear(mm, addr, pud);
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}
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static inline void page_table_check_ptes_set(struct mm_struct *mm,
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unsigned long addr, pte_t *ptep,
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pte_t pte, unsigned int nr)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_ptes_set(mm, addr, ptep, pte, nr);
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}
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static inline void page_table_check_pmds_set(struct mm_struct *mm,
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unsigned long addr, pmd_t *pmdp, pmd_t pmd, unsigned int nr)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_pmds_set(mm, addr, pmdp, pmd, nr);
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}
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static inline void page_table_check_puds_set(struct mm_struct *mm,
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unsigned long addr, pud_t *pudp, pud_t pud, unsigned int nr)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_puds_set(mm, addr, pudp, pud, nr);
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}
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static inline void page_table_check_pte_clear_range(struct mm_struct *mm,
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unsigned long addr,
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pmd_t pmd)
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{
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if (static_branch_likely(&page_table_check_disabled))
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return;
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__page_table_check_pte_clear_range(mm, addr, pmd);
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}
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#else
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static inline void page_table_check_alloc(struct page *page, unsigned int order)
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{
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}
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static inline void page_table_check_free(struct page *page, unsigned int order)
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{
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}
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static inline void page_table_check_pte_clear(struct mm_struct *mm,
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unsigned long addr, pte_t pte)
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{
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}
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static inline void page_table_check_pmd_clear(struct mm_struct *mm,
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unsigned long addr, pmd_t pmd)
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{
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}
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static inline void page_table_check_pud_clear(struct mm_struct *mm,
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unsigned long addr, pud_t pud)
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{
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}
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static inline void page_table_check_ptes_set(struct mm_struct *mm,
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unsigned long addr, pte_t *ptep,
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pte_t pte, unsigned int nr)
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{
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}
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static inline void page_table_check_pmds_set(struct mm_struct *mm,
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unsigned long addr, pmd_t *pmdp, pmd_t pmd, unsigned int nr)
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{
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}
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static inline void page_table_check_puds_set(struct mm_struct *mm,
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unsigned long addr, pud_t *pudp, pud_t pud, unsigned int nr)
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{
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}
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static inline void page_table_check_pte_clear_range(struct mm_struct *mm,
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unsigned long addr,
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pmd_t pmd)
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{
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}
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#endif /* CONFIG_PAGE_TABLE_CHECK */
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#define page_table_check_pmd_set(mm, addr, pmdp, pmd) page_table_check_pmds_set(mm, addr, pmdp, pmd, 1)
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#define page_table_check_pud_set(mm, addr, pudp, pud) page_table_check_puds_set(mm, addr, pudp, pud, 1)
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#endif /* __LINUX_PAGE_TABLE_CHECK_H */
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