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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-05-31 13:04:12 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-06-03 15:09:29 +0300 |
| commit | d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9 (patch) | |
| tree | 365dc4b9e63fe8b038078a8fe6e8b8acb32527b1 /arch/loongarch/include/asm/pgtable.h | |
| parent | 46859ac8af52ae599e1b51992ddef3eb43f295fc (diff) | |
| download | linux-d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9.tar.xz | |
LoongArch: Add Non-Uniform Memory Access (NUMA) support
Add Non-Uniform Memory Access (NUMA) support for LoongArch. LoongArch
has 48-bit physical address, but the HyperTransport I/O bus only support
40-bit address, so we need a custom phys_to_dma() and dma_to_phys() to
extract the 4-bit node id (bit 44~47) from Loongson-3's 48-bit physical
address space and embed it into 40-bit. In the 40-bit dma address, node
id offset can be read from the LS7A_DMA_CFG register.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/pgtable.h')
| -rw-r--r-- | arch/loongarch/include/asm/pgtable.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index 5e33987d0a13..5dc84d8f18d6 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -541,6 +541,18 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +#ifdef CONFIG_NUMA_BALANCING +static inline long pte_protnone(pte_t pte) +{ + return (pte_val(pte) & _PAGE_PROTNONE); +} + +static inline long pmd_protnone(pmd_t pmd) +{ + return (pmd_val(pmd) & _PAGE_PROTNONE); +} +#endif /* CONFIG_NUMA_BALANCING */ + /* * We provide our own get_unmapped area to cope with the virtual aliasing * constraints placed on us by the cache architecture. |