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    Subject[PATCH 4/7] arm64: Macros to check/set/unset the contiguous bit
    Date
    Add the supporting macros to check if the contiguous bit
    is set, set the bit, or clear it in a PTE entry.

    Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
    ---
    arch/arm64/include/asm/pgtable.h | 11 +++++++++++
    1 file changed, 11 insertions(+)

    diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
    index 6900b2d9..d43e1d1 100644
    --- a/arch/arm64/include/asm/pgtable.h
    +++ b/arch/arm64/include/asm/pgtable.h
    @@ -144,6 +144,7 @@ extern struct page *empty_zero_page;
    #define pte_special(pte) (!!(pte_val(pte) & PTE_SPECIAL))
    #define pte_write(pte) (!!(pte_val(pte) & PTE_WRITE))
    #define pte_exec(pte) (!(pte_val(pte) & PTE_UXN))
    +#define pte_cont(pte) (!!(pte_val(pte) & PTE_CONT))

    #ifdef CONFIG_ARM64_HW_AFDBM
    #define pte_hw_dirty(pte) (!(pte_val(pte) & PTE_RDONLY))
    @@ -206,6 +207,16 @@ static inline pte_t pte_mkspecial(pte_t pte)
    return set_pte_bit(pte, __pgprot(PTE_SPECIAL));
    }

    +static inline pte_t pte_mkcont(pte_t pte)
    +{
    + return set_pte_bit(pte, __pgprot(PTE_CONT));
    +}
    +
    +static inline pte_t pte_mknoncont(pte_t pte)
    +{
    + return clear_pte_bit(pte, __pgprot(PTE_CONT));
    +}
    +
    static inline void set_pte(pte_t *ptep, pte_t pte)
    {
    *ptep = pte;
    --
    2.4.3



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