diff options
Diffstat (limited to 'arch/riscv/include/asm/pgtable-bits.h')
| -rw-r--r-- | arch/riscv/include/asm/pgtable-bits.h | 56 |
1 files changed, 43 insertions, 13 deletions
diff --git a/arch/riscv/include/asm/pgtable-bits.h b/arch/riscv/include/asm/pgtable-bits.h index 2ee413912926..b422d9691e60 100644 --- a/arch/riscv/include/asm/pgtable-bits.h +++ b/arch/riscv/include/asm/pgtable-bits.h @@ -6,12 +6,6 @@ #ifndef _ASM_RISCV_PGTABLE_BITS_H #define _ASM_RISCV_PGTABLE_BITS_H -/* - * PTE format: - * | XLEN-1 10 | 9 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 - * PFN reserved for SW D A G U X W R V - */ - #define _PAGE_ACCESSED_OFFSET 6 #define _PAGE_PRESENT (1 << 0) @@ -22,23 +16,59 @@ #define _PAGE_GLOBAL (1 << 5) /* Global */ #define _PAGE_ACCESSED (1 << 6) /* Set by hardware on any access */ #define _PAGE_DIRTY (1 << 7) /* Set by hardware on any write */ -#define _PAGE_SOFT (1 << 8) /* Reserved for software */ +#define _PAGE_SOFT (3 << 8) /* Reserved for software */ + +#define _PAGE_SPECIAL (1 << 8) /* RSW: 0x1 */ + +#ifdef CONFIG_MEM_SOFT_DIRTY + +/* ext_svrsw60t59b: bit 59 for soft-dirty tracking */ +#define _PAGE_SOFT_DIRTY \ + ((riscv_has_extension_unlikely(RISCV_ISA_EXT_SVRSW60T59B)) ? \ + (1UL << 59) : 0) +/* + * Bit 3 is always zero for swap entry computation, so we + * can borrow it for swap page soft-dirty tracking. + */ +#define _PAGE_SWP_SOFT_DIRTY \ + ((riscv_has_extension_unlikely(RISCV_ISA_EXT_SVRSW60T59B)) ? \ + _PAGE_EXEC : 0) +#else +#define _PAGE_SOFT_DIRTY 0 +#define _PAGE_SWP_SOFT_DIRTY 0 +#endif /* CONFIG_MEM_SOFT_DIRTY */ + +#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP + +/* ext_svrsw60t59b: Bit(60) for uffd-wp tracking */ +#define _PAGE_UFFD_WP \ + ((riscv_has_extension_unlikely(RISCV_ISA_EXT_SVRSW60T59B)) ? \ + (1UL << 60) : 0) +/* + * Bit 4 is not involved into swap entry computation, so we + * can borrow it for swap page uffd-wp tracking. + */ +#define _PAGE_SWP_UFFD_WP \ + ((riscv_has_extension_unlikely(RISCV_ISA_EXT_SVRSW60T59B)) ? \ + _PAGE_USER : 0) +#else +#define _PAGE_UFFD_WP 0 +#define _PAGE_SWP_UFFD_WP 0 +#endif -#define _PAGE_SPECIAL _PAGE_SOFT #define _PAGE_TABLE _PAGE_PRESENT /* * _PAGE_PROT_NONE is set on not-present pages (and ignored by the hardware) to * distinguish them from swapped out pages */ -#define _PAGE_PROT_NONE _PAGE_READ +#define _PAGE_PROT_NONE _PAGE_GLOBAL + +/* Used for swap PTEs only. */ +#define _PAGE_SWP_EXCLUSIVE _PAGE_ACCESSED #define _PAGE_PFN_SHIFT 10 -/* Set of bits to preserve across pte_modify() */ -#define _PAGE_CHG_MASK (~(unsigned long)(_PAGE_PRESENT | _PAGE_READ | \ - _PAGE_WRITE | _PAGE_EXEC | \ - _PAGE_USER | _PAGE_GLOBAL)) /* * when all of R/W/X are zero, the PTE is a pointer to the next level * of the page table; otherwise, it is a leaf PTE. |