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    Subject[PATCH 2/3] RISC-V: mm: Enable huge page support to kernel_page_present() function
    Date
    Currently kernel_page_present() function doesn't support huge page
    detection causes the function to mistakenly return false to the
    hibernation core.

    Add huge page detection to the function to solve the problem.

    Signed-off-by: Sia Jee Heng <jeeheng.sia@starfivetech.com>
    Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
    Reviewed-by: Mason Huo <mason.huo@starfivetech.com>
    ---
    arch/riscv/mm/pageattr.c | 6 ++++++
    1 file changed, 6 insertions(+)

    diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c
    index 86c56616e5de..fb59d494d708 100644
    --- a/arch/riscv/mm/pageattr.c
    +++ b/arch/riscv/mm/pageattr.c
    @@ -221,14 +221,20 @@ bool kernel_page_present(struct page *page)
    p4d = p4d_offset(pgd, addr);
    if (!p4d_present(*p4d))
    return false;
    + if (pgtable_l5_enabled && p4d_leaf(*pud))
    + return true;

    pud = pud_offset(p4d, addr);
    if (!pud_present(*pud))
    return false;
    + if (pgtable_l4_enabled && pud_leaf(*pud))
    + return true;

    pmd = pmd_offset(pud, addr);
    if (!pmd_present(*pmd))
    return false;
    + if (pmd_leaf(*pmd))
    + return true;

    pte = pte_offset_kernel(pmd, addr);
    return pte_present(*pte);
    --
    2.34.1
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