diff options
Diffstat (limited to 'arch/loongarch/mm/pageattr.c')
| -rw-r--r-- | arch/loongarch/mm/pageattr.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/loongarch/mm/pageattr.c b/arch/loongarch/mm/pageattr.c index ffd8d76021d4..99165903908a 100644 --- a/arch/loongarch/mm/pageattr.c +++ b/arch/loongarch/mm/pageattr.c @@ -3,6 +3,7 @@ * Copyright (C) 2024 Loongson Technology Corporation Limited */ +#include <linux/memblock.h> #include <linux/pagewalk.h> #include <linux/pgtable.h> #include <asm/set_memory.h> @@ -167,7 +168,7 @@ bool kernel_page_present(struct page *page) unsigned long addr = (unsigned long)page_address(page); if (addr < vm_map_base) - return true; + return memblock_is_memory(__pa(addr)); pgd = pgd_offset_k(addr); if (pgd_none(pgdp_get(pgd))) @@ -216,3 +217,22 @@ int set_direct_map_invalid_noflush(struct page *page) return __set_memory(addr, 1, __pgprot(0), __pgprot(_PAGE_PRESENT | _PAGE_VALID)); } + +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) +{ + unsigned long addr = (unsigned long)page_address(page); + pgprot_t set, clear; + + if (addr < vm_map_base) + return 0; + + if (valid) { + set = PAGE_KERNEL; + clear = __pgprot(0); + } else { + set = __pgprot(0); + clear = __pgprot(_PAGE_PRESENT | _PAGE_VALID); + } + + return __set_memory(addr, 1, set, clear); +} |