diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
| commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
| tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /arch/x86/mm/init.c | |
| parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) | |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'arch/x86/mm/init.c')
| -rw-r--r-- | arch/x86/mm/init.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 4459e4c4b..d28a2d741 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -17,6 +17,7 @@ #include <asm/proto.h> #include <asm/dma.h> /* for MAX_DMA_PFN */ #include <asm/microcode.h> +#include <asm/kaslr.h> /* * We need to define the tracepoints somewhere, and tlb.c @@ -121,8 +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) { @@ -150,10 +161,10 @@ static int page_size_mask; static void __init probe_page_size_mask(void) { -#if !defined(CONFIG_KMEMCHECK) && !defined(CONFIG_TOI_INCREMENTAL) +#if !defined(CONFIG_KMEMCHECK) /* - * For CONFIG_KMEMCHECK, TuxOnIce's incremental image support or - * pagealloc debugging, identity mapping will use small pages. + * For CONFIG_KMEMCHECK or pagealloc debugging, identity mapping will + * use small pages. * This will simplify cpa(), which otherwise needs to support splitting * large pages into small in interrupt context, etc. */ @@ -207,7 +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; @@ -395,7 +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]; @@ -590,6 +601,9 @@ void __init init_mem_mapping(void) /* the ISA range is always mapped regardless of memory holes */ init_memory_mapping(0, ISA_END_ADDRESS); + /* Init the trampoline, possibly with KASLR memory offset */ + init_trampoline(); + /* * If the allocation is in bottom-up direction, we setup direct mapping * in bottom-up, otherwise we setup direct mapping in top-down. |