Unverified Commit 3e5b0bdb authored by Greentime Hu's avatar Greentime Hu Committed by Palmer Dabbelt
Browse files

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: default avatarGreentime Hu <greentime.hu@sifive.com>
Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
Reviewed-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent cbd34f4b

arch/riscv/include/asm/pgtable.h

+20 −0
Original line number Diff line number Diff line
@@ -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)

{