diff options
Diffstat (limited to 'arch/x86/mm/init.c')
| -rw-r--r-- | arch/x86/mm/init.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index fb4c1b42fc7e..22af912d66d2 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -122,8 +122,18 @@ __ref void *alloc_low_pages(unsigned int num) return __va(pfn << PAGE_SHIFT); } -/* need 3 4k for initial PMD_SIZE, 3 4k for 0-ISA_END_ADDRESS */ -#define INIT_PGT_BUF_SIZE (6 * PAGE_SIZE) +/* + * By default need 3 4k for initial PMD_SIZE, 3 4k for 0-ISA_END_ADDRESS. + * With KASLR memory randomization, depending on the machine e820 memory + * and the PUD alignment. We may need twice more pages when KASLR memory + * randomization is enabled. + */ +#ifndef CONFIG_RANDOMIZE_MEMORY +#define INIT_PGD_PAGE_COUNT 6 +#else +#define INIT_PGD_PAGE_COUNT 12 +#endif +#define INIT_PGT_BUF_SIZE (INIT_PGD_PAGE_COUNT * PAGE_SIZE) RESERVE_BRK(early_pgt_alloc, INIT_PGT_BUF_SIZE); void __init early_alloc_pgt_buf(void) { @@ -208,7 +218,7 @@ static int __meminit save_mr(struct map_range *mr, int nr_range, * adjust the page_size_mask for small range to go with * big page size instead small one if nearby are ram too. */ -static void __init_refok adjust_range_page_size_mask(struct map_range *mr, +static void __ref adjust_range_page_size_mask(struct map_range *mr, int nr_range) { int i; @@ -396,7 +406,7 @@ bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn) * This runs before bootmem is initialized and gets pages directly from * the physical memory. To access them they are temporarily mapped. */ -unsigned long __init_refok init_memory_mapping(unsigned long start, +unsigned long __ref init_memory_mapping(unsigned long start, unsigned long end) { struct map_range mr[NR_RANGE_MR]; @@ -689,8 +699,10 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end) } } -void free_initmem(void) +void __ref free_initmem(void) { + e820_reallocate_tables(); + free_init_pages("unused kernel", (unsigned long)(&__init_begin), (unsigned long)(&__init_end)); |