diff options
Diffstat (limited to 'arch/arm64/mm/mmu.c')
| -rw-r--r-- | arch/arm64/mm/mmu.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 8fc302d84e1f..1cab2703f5a8 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -386,14 +386,14 @@ static void create_mapping_late(phys_addr_t phys, unsigned long virt, static void __init __map_memblock(pgd_t *pgd, phys_addr_t start, phys_addr_t end) { unsigned long kernel_start = __pa(_text); - unsigned long kernel_end = __pa(_etext); + unsigned long kernel_end = __pa(__init_begin); /* * Take care not to create a writable alias for the * read-only text and rodata sections of the kernel image. */ - /* No overlap with the kernel text */ + /* No overlap with the kernel text/rodata */ if (end < kernel_start || start >= kernel_end) { __create_pgd_mapping(pgd, start, __phys_to_virt(start), end - start, PAGE_KERNEL, @@ -402,7 +402,7 @@ static void __init __map_memblock(pgd_t *pgd, phys_addr_t start, phys_addr_t end } /* - * This block overlaps the kernel text mapping. + * This block overlaps the kernel text/rodata mappings. * Map the portion(s) which don't overlap. */ if (start < kernel_start) @@ -417,7 +417,7 @@ static void __init __map_memblock(pgd_t *pgd, phys_addr_t start, phys_addr_t end early_pgtable_alloc); /* - * Map the linear alias of the [_text, _etext) interval as + * Map the linear alias of the [_text, __init_begin) interval as * read-only/non-executable. This makes the contents of the * region accessible to subsystems such as hibernate, but * protects it from inadvertent modification or execution. @@ -438,6 +438,8 @@ static void __init map_mem(pgd_t *pgd) if (start >= end) break; + if (memblock_is_nomap(reg)) + continue; __map_memblock(pgd, start, end); } @@ -447,14 +449,14 @@ void mark_rodata_ro(void) { unsigned long section_size; - section_size = (unsigned long)__start_rodata - (unsigned long)_text; + section_size = (unsigned long)_etext - (unsigned long)_text; create_mapping_late(__pa(_text), (unsigned long)_text, section_size, PAGE_KERNEL_ROX); /* - * mark .rodata as read only. Use _etext rather than __end_rodata to - * cover NOTES and EXCEPTION_TABLE. + * mark .rodata as read only. Use __init_begin rather than __end_rodata + * to cover NOTES and EXCEPTION_TABLE. */ - section_size = (unsigned long)_etext - (unsigned long)__start_rodata; + section_size = (unsigned long)__init_begin - (unsigned long)__start_rodata; create_mapping_late(__pa(__start_rodata), (unsigned long)__start_rodata, section_size, PAGE_KERNEL_RO); } @@ -497,8 +499,8 @@ static void __init map_kernel(pgd_t *pgd) { static struct vm_struct vmlinux_text, vmlinux_rodata, vmlinux_init, vmlinux_data; - map_kernel_segment(pgd, _text, __start_rodata, PAGE_KERNEL_EXEC, &vmlinux_text); - map_kernel_segment(pgd, __start_rodata, _etext, PAGE_KERNEL, &vmlinux_rodata); + map_kernel_segment(pgd, _text, _etext, PAGE_KERNEL_EXEC, &vmlinux_text); + map_kernel_segment(pgd, __start_rodata, __init_begin, PAGE_KERNEL, &vmlinux_rodata); map_kernel_segment(pgd, __init_begin, __init_end, PAGE_KERNEL_EXEC, &vmlinux_init); map_kernel_segment(pgd, _data, _end, PAGE_KERNEL, &vmlinux_data); |