From 3e5b0bdb2a4dd8c09a9db01b1ead3f69cabd0c67 Mon Sep 17 00:00:00 2001 From: Greentime Hu Date: Wed, 18 Nov 2020 16:38:28 -0800 Subject: [PATCH] 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 Reviewed-by: Anup Patel Reviewed-by: Palmer Dabbelt Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/pgtable.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 4dd56ea..25e90cf 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) { -- 2.7.4