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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>
This commit is contained in:
Greentime Hu 2020-11-18 16:38:28 -08:00 committed by Palmer Dabbelt
parent cbd34f4bb3
commit 3e5b0bdb2a
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1 changed files with 20 additions and 0 deletions
arch/riscv/include/asm
pgtable.h

20
arch/riscv/include/asm/pgtable.h
View File

@ -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); 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 */ /* Yields the page frame number (PFN) of a page table entry */
static inline unsigned long pte_pfn(pte_t pte) static inline unsigned long pte_pfn(pte_t pte)
{ {
@ -290,6 +295,21 @@ static inline pte_t pte_mkhuge(pte_t pte)
return 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 */ /* Modify page protection bits */
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{ {