Unverified Commit a15c90b6 authored by Sia Jee Heng's avatar Sia Jee Heng Committed by Palmer Dabbelt
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RISC-V: mm: Enable huge page support to kernel_page_present() function 



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.

Fixes: 9e953cda ("riscv: Introduce huge page support for 32/64bit kernel")
Signed-off-by: default avatarSia Jee Heng <jeeheng.sia@starfivetech.com>
Reviewed-by: default avatarLey Foon Tan <leyfoon.tan@starfivetech.com>
Reviewed-by: default avatarMason Huo <mason.huo@starfivetech.com>
Reviewed-by: default avatarAndrew Jones <ajones@ventanamicro.com>
Reviewed-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230330064321.1008373-4-jeeheng.sia@starfivetech.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent fcb89863

arch/riscv/mm/pageattr.c

+8 −0
Original line number Diff line number Diff line
@@ -217,18 +217,26 @@ bool kernel_page_present(struct page *page) 
	pgd = pgd_offset_k(addr);

	if (!pgd_present(*pgd))

		return false;

	if (pgd_leaf(*pgd))

		return true;



	p4d = p4d_offset(pgd, addr);

	if (!p4d_present(*p4d))

		return false;

	if (p4d_leaf(*p4d))

		return true;



	pud = pud_offset(p4d, addr);

	if (!pud_present(*pud))

		return false;

	if (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);