diff options
| author | Alexandre Ghiti <alexghiti@rivosinc.com> | 2024-01-28 12:59:53 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-06-26 07:56:26 -0700 |
| commit | 50b5bae5be1b5f0a778e1b1a0a4dcda54c76cdce (patch) | |
| tree | 1d19431e2d04d665979e628e377734959bbbac92 /arch/riscv | |
| parent | 914e618b4372550d58a5f3a378b2255d70a1ec08 (diff) | |
riscv: Implement pte_accessible()
Like other architectures, a pte is accessible if it is present or if
there is a pending tlb flush and the pte is protnone (which could be the
case when a pte is downgraded to protnone before a flush tlb is
executed).
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240128115953.25085-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index aad8b8ca51f1..4dbfaa629df7 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -350,6 +350,19 @@ static inline int pte_present(pte_t pte) return (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROT_NONE)); } +#define pte_accessible pte_accessible +static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a) +{ + if (pte_val(a) & _PAGE_PRESENT) + return true; + + if ((pte_val(a) & _PAGE_PROT_NONE) && + atomic_read(&mm->tlb_flush_pending)) + return true; + + return false; +} + static inline int pte_none(pte_t pte) { return (pte_val(pte) == 0); |