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authorSia Jee Heng2023-03-30 14:43:20 +0800
committerGreg Kroah-Hartman2023-05-17 11:53:34 +0200
commitffa97b59526e49ce806e3986a9c03a9971c84f0b (patch)
tree2615a5fb7e2f17c45ef59be7ae978addb7efe444 /arch/riscv/mm
parent1e8ad3e45b5d030541573b55df6f4a559d608d86 (diff)
RISC-V: mm: Enable huge page support to kernel_page_present() function
[ Upstream commit a15c90b67a662c75f469822a7f95c7aaa049e28f ] 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 <jeeheng.sia@starfivetech.com> Reviewed-by: Ley Foon Tan <leyfoon.tan@starfivetech.com> Reviewed-by: Mason Huo <mason.huo@starfivetech.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/20230330064321.1008373-4-jeeheng.sia@starfivetech.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/riscv/mm')
-rw-r--r--arch/riscv/mm/pageattr.c8
1 files changed, 8 insertions, 0 deletions
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);