diff options
| author | Enze Li <lienze@kylinos.cn> | 2023-09-06 22:53:55 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-09-06 22:53:55 +0800 |
| commit | 8b5cb1cbf33292372933e727805e68b506852234 (patch) | |
| tree | 7fd867e455d430dc775292c7b912284e1d21d457 /arch/loongarch/mm/pgtable.c | |
| parent | ec9fee79d48f2f05cb1b95dc901071aa3670f228 (diff) | |
LoongArch: mm: Add page table mapped mode support for virt_to_page()
According to LoongArch documentations, there are two types of address
translation modes: direct mapped address translation mode (DMW mode) and
page table mapped address translation mode (TLB mode).
Currently, virt_to_page() only supports direct mapped mode. This patch
determines which mode is used, and adds corresponding handling functions
for both modes.
For more details on the two modes, see [1].
[1] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#virtual-address-space-and-address-translation-mode
Signed-off-by: Enze Li <lienze@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/mm/pgtable.c')
| -rw-r--r-- | arch/loongarch/mm/pgtable.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/loongarch/mm/pgtable.c b/arch/loongarch/mm/pgtable.c index 36a6dc0148ae..482923251824 100644 --- a/arch/loongarch/mm/pgtable.c +++ b/arch/loongarch/mm/pgtable.c @@ -9,6 +9,18 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> +struct page *dmw_virt_to_page(unsigned long kaddr) +{ + return pfn_to_page(virt_to_pfn(kaddr)); +} +EXPORT_SYMBOL_GPL(dmw_virt_to_page); + +struct page *tlb_virt_to_page(unsigned long kaddr) +{ + return pfn_to_page(pte_pfn(*virt_to_kpte(kaddr))); +} +EXPORT_SYMBOL_GPL(tlb_virt_to_page); + pgd_t *pgd_alloc(struct mm_struct *mm) { pgd_t *ret, *init; |