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| author | Nanyong Sun <sunnanyong@huawei.com> | 2021-04-30 11:28:47 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-05-22 20:19:29 +0300 |
| commit | f5397c3ee0a3e2ca0a6d66d079ffcd5386b45b81 (patch) | |
| tree | 8372806f05bfd2b3cca7a2eef002302e0c3f04c8 /arch/riscv/include/asm | |
| parent | 6efb943b8616ec53a5e444193dccf1af9ad627b5 (diff) | |
| download | linux-f5397c3ee0a3e2ca0a6d66d079ffcd5386b45b81.tar.xz | |
riscv: mm: add _PAGE_LEAF macro
In riscv, a page table entry is leaf when any bit of read, write,
or execute bit is set. So add a macro:_PAGE_LEAF instead of
(_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC), which is frequently used
to determine if it is a leaf page. This make code easier to read,
without any functional change.
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/pgtable-64.h | 3 | ||||
| -rw-r--r-- | arch/riscv/include/asm/pgtable-bits.h | 5 | ||||
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 6 |
3 files changed, 8 insertions, 6 deletions
diff --git a/arch/riscv/include/asm/pgtable-64.h b/arch/riscv/include/asm/pgtable-64.h index f3b0da64c6c8..e3b7c5dd6a80 100644 --- a/arch/riscv/include/asm/pgtable-64.h +++ b/arch/riscv/include/asm/pgtable-64.h @@ -46,8 +46,7 @@ static inline int pud_bad(pud_t pud) #define pud_leaf pud_leaf static inline int pud_leaf(pud_t pud) { - return pud_present(pud) && - (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); + return pud_present(pud) && (pud_val(pud) & _PAGE_LEAF); } static inline void set_pud(pud_t *pudp, pud_t pud) diff --git a/arch/riscv/include/asm/pgtable-bits.h b/arch/riscv/include/asm/pgtable-bits.h index bbaeb5d35842..2ee413912926 100644 --- a/arch/riscv/include/asm/pgtable-bits.h +++ b/arch/riscv/include/asm/pgtable-bits.h @@ -39,5 +39,10 @@ #define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \ _PAGE_WRITE | _PAGE_EXEC | \ _PAGE_USER | _PAGE_GLOBAL)) +/* + * when all of R/W/X are zero, the PTE is a pointer to the next level + * of the page table; otherwise, it is a leaf PTE. + */ +#define _PAGE_LEAF (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC) #endif /* _ASM_RISCV_PGTABLE_BITS_H */ diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 9469f464e71a..dbced7d37768 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -190,8 +190,7 @@ static inline int pmd_bad(pmd_t pmd) #define pmd_leaf pmd_leaf static inline int pmd_leaf(pmd_t pmd) { - return pmd_present(pmd) && - (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); + return pmd_present(pmd) && (pmd_val(pmd) & _PAGE_LEAF); } static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) @@ -267,8 +266,7 @@ static inline int pte_exec(pte_t pte) static inline int pte_huge(pte_t pte) { - return pte_present(pte) - && (pte_val(pte) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); + return pte_present(pte) && (pte_val(pte) & _PAGE_LEAF); } static inline int pte_dirty(pte_t pte) |