diff options
Diffstat (limited to 'arch/riscv/include/asm/pgtable.h')
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 23c7c66f2d79..2ab6650d3926 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -62,7 +62,7 @@ * position vmemmap directly below the VMALLOC region. */ #ifdef CONFIG_64BIT -#define VA_BITS 39 +#define VA_BITS (pgtable_l4_enabled ? 48 : 39) #else #define VA_BITS 32 #endif @@ -102,8 +102,7 @@ #ifndef __ASSEMBLY__ -/* Page Upper Directory not used in RISC-V */ -#include <asm-generic/pgtable-nopud.h> +#include <asm-generic/pgtable-nop4d.h> #include <asm/page.h> #include <asm/tlbflush.h> #include <linux/mm_types.h> @@ -126,6 +125,17 @@ #define XIP_FIXUP(addr) (addr) #endif /* CONFIG_XIP_KERNEL */ +struct pt_alloc_ops { + pte_t *(*get_pte_virt)(phys_addr_t pa); + phys_addr_t (*alloc_pte)(uintptr_t va); +#ifndef __PAGETABLE_PMD_FOLDED + pmd_t *(*get_pmd_virt)(phys_addr_t pa); + phys_addr_t (*alloc_pmd)(uintptr_t va); + pud_t *(*get_pud_virt)(phys_addr_t pa); + phys_addr_t (*alloc_pud)(uintptr_t va); +#endif +}; + #ifdef CONFIG_MMU /* Number of PGD entries that a user-mode program can use */ #define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE) @@ -677,9 +687,11 @@ static inline pmd_t pmdp_establish(struct vm_area_struct *vma, * Note that PGDIR_SIZE must evenly divide TASK_SIZE. */ #ifdef CONFIG_64BIT -#define TASK_SIZE (PGDIR_SIZE * PTRS_PER_PGD / 2) +#define TASK_SIZE (PGDIR_SIZE * PTRS_PER_PGD / 2) +#define TASK_SIZE_MIN (PGDIR_SIZE_L3 * PTRS_PER_PGD / 2) #else -#define TASK_SIZE FIXADDR_START +#define TASK_SIZE FIXADDR_START +#define TASK_SIZE_MIN TASK_SIZE #endif #else /* CONFIG_MMU */ @@ -705,6 +717,8 @@ extern uintptr_t _dtb_early_pa; #define dtb_early_va _dtb_early_va #define dtb_early_pa _dtb_early_pa #endif /* CONFIG_XIP_KERNEL */ +extern u64 satp_mode; +extern bool pgtable_l4_enabled; void paging_init(void); void misc_mem_init(void); |