diff options
| author | Greentime Hu <greentime.hu@sifive.com> | 2020-11-19 03:38:28 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-01-15 02:08:57 +0300 |
| commit | 3e5b0bdb2a4dd8c09a9db01b1ead3f69cabd0c67 (patch) | |
| tree | 94d4f02dd157717ed207bc9c02e246d7b741de63 /arch/riscv/include | |
| parent | cbd34f4bb37d62d8a027f54205bff07e73340da4 (diff) | |
| download | linux-3e5b0bdb2a4dd8c09a9db01b1ead3f69cabd0c67.tar.xz | |
riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING
These two functions are used to distinguish between PROT_NONENUMA
protections and hinting fault protections.
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 4dd56ea4a687..25e90cf0bde4 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -187,6 +187,11 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd) return (unsigned long)pfn_to_virt(pmd_val(pmd) >> _PAGE_PFN_SHIFT); } +static inline pte_t pmd_pte(pmd_t pmd) +{ + return __pte(pmd_val(pmd)); +} + /* Yields the page frame number (PFN) of a page table entry */ static inline unsigned long pte_pfn(pte_t pte) { @@ -290,6 +295,21 @@ static inline pte_t pte_mkhuge(pte_t pte) return pte; } +#ifdef CONFIG_NUMA_BALANCING +/* + * See the comment in include/asm-generic/pgtable.h + */ +static inline int pte_protnone(pte_t pte) +{ + return (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROT_NONE)) == _PAGE_PROT_NONE; +} + +static inline int pmd_protnone(pmd_t pmd) +{ + return pte_protnone(pmd_pte(pmd)); +} +#endif + /* Modify page protection bits */ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { |