From a15c90b67a662c75f469822a7f95c7aaa049e28f Mon Sep 17 00:00:00 2001 From: Sia Jee Heng Date: Thu, 30 Mar 2023 14:43:20 +0800 Subject: 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: 9e953cda5cdf ("riscv: Introduce huge page support for 32/64bit kernel") Signed-off-by: Sia Jee Heng Reviewed-by: Ley Foon Tan Reviewed-by: Mason Huo Reviewed-by: Andrew Jones Reviewed-by: Alexandre Ghiti Link: https://lore.kernel.org/r/20230330064321.1008373-4-jeeheng.sia@starfivetech.com Signed-off-by: Palmer Dabbelt --- arch/riscv/mm/pageattr.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/riscv/mm/pageattr.c') diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 86c56616e5de..ea3d61de065b 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -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); -- cgit v1.2.3-58-ga151