diff options
| author |  Tong Tiangen <tongtiangen@huawei.com>
| 2022-05-12 20:23:06 -0700 |
|---|---|---|
| committer |  Andrew Morton <akpm@linux-foundation.org>
| 2022-05-13 07:20:17 -0700 |
| commit | de8c8e52836d0082188508548d0b939f49f7f0e6 (patch) | |
| tree | 58a85e75705469ac54f84d56d3409c5f05b501ba /arch/x86/include/asm/pgtable.h | |
| parent | mm: page_table_check: move pxx_user_accessible_page into x86 (diff) | |
| download | linux-de8c8e52836d0082188508548d0b939f49f7f0e6.tar.gz linux-de8c8e52836d0082188508548d0b939f49f7f0e6.tar.bz2 linux-de8c8e52836d0082188508548d0b939f49f7f0e6.zip | |
mm: page_table_check: add hooks to public helpers
Move ptep_clear() to the include/linux/pgtable.h and add page table check
relate hooks to some helpers, it's prepare for support page table check
feature on new architecture.
Optimize the implementation of ptep_clear(), page table hooks added page
table check stubs, the interface control should be at stubs, there is no
rationale for doing a IS_ENABLED() check here.
For architectures that do not enable CONFIG_PAGE_TABLE_CHECK, they will
call a fallback page table check stubs[1] when getting their page table
helpers[2] in include/linux/pgtable.h.
[1] page table check stubs defined in include/linux/page_table_check.h
[2] ptep_clear() ptep_get_and_clear() pmdp_huge_get_and_clear()
pudp_huge_get_and_clear()
Link: https://lkml.kernel.org/r/20220507110114.4128854-4-tongtiangen@huawei.com
Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>
Acked-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/x86/include/asm/pgtable.h')
| -rw-r--r-- | arch/x86/include/asm/pgtable.h | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 46fa65d818bd..44e2d6f1dbaa 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1072,16 +1072,6 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, return pte; } -#define __HAVE_ARCH_PTEP_CLEAR -static inline void ptep_clear(struct mm_struct *mm, unsigned long addr, - pte_t *ptep) -{ - if (IS_ENABLED(CONFIG_PAGE_TABLE_CHECK)) - ptep_get_and_clear(mm, addr, ptep); - else - pte_clear(mm, addr, ptep); -} - #define __HAVE_ARCH_PTEP_SET_WRPROTECT static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |