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authorGreentime Hu <greentime.hu@sifive.com>2020-11-18 16:38:28 -0800
committerPalmer Dabbelt <palmerdabbelt@google.com>2021-01-14 15:08:57 -0800
commit3e5b0bdb2a4dd8c09a9db01b1ead3f69cabd0c67 (patch)
tree94d4f02dd157717ed207bc9c02e246d7b741de63 /arch/riscv/include/asm
parentcbd34f4bb37d62d8a027f54205bff07e73340da4 (diff)
downloadlinux-3e5b0bdb2a4dd8c09a9db01b1ead3f69cabd0c67.tar.gz
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/asm')
-rw-r--r--arch/riscv/include/asm/pgtable.h20
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)
{