On Tue, Oct 6, 2020 at 5:48 AM Atish Patra <atish.patra@xxxxxxx> wrote:
>
> From: Greentime Hu <greentime.hu@xxxxxxxxxx>
>
> These two functions are used to distinguish between PROT_NONENUMA
> protections and hinting fault protections.
>
> Signed-off-by: Greentime Hu <greentime.hu@xxxxxxxxxx>
> ---
> 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 515b42f98d34..2751110675e6 100644
> --- a/arch/riscv/include/asm/pgtable.h
> +++ b/arch/riscv/include/asm/pgtable.h
> @@ -183,6 +183,11 @@ 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)
> {
> @@ -286,6 +291,21 @@ 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)
> {
> --
> 2.25.1
>
Looks good to me.
Reviewed-by: Anup Patel <anup@xxxxxxxxxxxxxx>
Regards,
Anup
