diff options
Diffstat (limited to 'arch/riscv/include/asm/pgtable.h')
| -rw-r--r-- | arch/riscv/include/asm/pgtable.h | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index ebf817c1bdf4..5afda75cc2c3 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -11,23 +11,38 @@ #include <asm/pgtable-bits.h> -#ifndef __ASSEMBLY__ +#ifndef CONFIG_MMU +#define KERNEL_LINK_ADDR PAGE_OFFSET +#else -/* Page Upper Directory not used in RISC-V */ -#include <asm-generic/pgtable-nopud.h> -#include <asm/page.h> -#include <asm/tlbflush.h> -#include <linux/mm_types.h> +#define ADDRESS_SPACE_END (UL(-1)) -#ifdef CONFIG_MMU +#ifdef CONFIG_64BIT +/* Leave 2GB for kernel and BPF at the end of the address space */ +#define KERNEL_LINK_ADDR (ADDRESS_SPACE_END - SZ_2G + 1) +#else +#define KERNEL_LINK_ADDR PAGE_OFFSET +#endif #define VMALLOC_SIZE (KERN_VIRT_SIZE >> 1) #define VMALLOC_END (PAGE_OFFSET - 1) #define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE) #define BPF_JIT_REGION_SIZE (SZ_128M) +#ifdef CONFIG_64BIT +/* KASLR should leave at least 128MB for BPF after the kernel */ +#define BPF_JIT_REGION_START PFN_ALIGN((unsigned long)&_end) +#define BPF_JIT_REGION_END (BPF_JIT_REGION_START + BPF_JIT_REGION_SIZE) +#else #define BPF_JIT_REGION_START (PAGE_OFFSET - BPF_JIT_REGION_SIZE) #define BPF_JIT_REGION_END (VMALLOC_END) +#endif + +/* Modules always live before the kernel */ +#ifdef CONFIG_64BIT +#define MODULES_VADDR (PFN_ALIGN((unsigned long)&_end) - SZ_2G) +#define MODULES_END (PFN_ALIGN((unsigned long)&_start)) +#endif /* * Roughly size the vmemmap space to be large enough to fit enough @@ -57,9 +72,16 @@ #define FIXADDR_SIZE PGDIR_SIZE #endif #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) - #endif +#ifndef __ASSEMBLY__ + +/* Page Upper Directory not used in RISC-V */ +#include <asm-generic/pgtable-nopud.h> +#include <asm/page.h> +#include <asm/tlbflush.h> +#include <linux/mm_types.h> + #ifdef CONFIG_64BIT #include <asm/pgtable-64.h> #else @@ -484,6 +506,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma, #define kern_addr_valid(addr) (1) /* FIXME */ +extern char _start[]; extern void *dtb_early_va; extern uintptr_t dtb_early_pa; void setup_bootmem(void); |