1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _LINUX_MMAN_H 3 #define _LINUX_MMAN_H 4 5 #include <asm/mman.h> 6 #include <asm-generic/hugetlb_encode.h> 7 #include <linux/types.h> 8 9 #define MREMAP_MAYMOVE 1 10 #define MREMAP_FIXED 2 11 #define MREMAP_DONTUNMAP 4 12 13 #define OVERCOMMIT_GUESS 0 14 #define OVERCOMMIT_ALWAYS 1 15 #define OVERCOMMIT_NEVER 2 16 17 #define MAP_SHARED 0x01 /* Share changes */ 18 #define MAP_PRIVATE 0x02 /* Changes are private */ 19 #define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */ 20 #define MAP_DROPPABLE 0x08 /* Zero memory under memory pressure. */ 21 22 /* 23 * Huge page size encoding when MAP_HUGETLB is specified, and a huge page 24 * size other than the default is desired. See hugetlb_encode.h. 25 * All known huge page size encodings are provided here. It is the 26 * responsibility of the application to know which sizes are supported on 27 * the running system. See mmap(2) man page for details. 28 */ 29 #define MAP_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT 30 #define MAP_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK 31 32 #define MAP_HUGE_16KB HUGETLB_FLAG_ENCODE_16KB 33 #define MAP_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB 34 #define MAP_HUGE_512KB HUGETLB_FLAG_ENCODE_512KB 35 #define MAP_HUGE_1MB HUGETLB_FLAG_ENCODE_1MB 36 #define MAP_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB 37 #define MAP_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB 38 #define MAP_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB 39 #define MAP_HUGE_32MB HUGETLB_FLAG_ENCODE_32MB 40 #define MAP_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB 41 #define MAP_HUGE_512MB HUGETLB_FLAG_ENCODE_512MB 42 #define MAP_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB 43 #define MAP_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB 44 #define MAP_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB 45 46 struct cachestat_range { 47 __u64 off; 48 __u64 len; 49 }; 50 51 struct cachestat { 52 __u64 nr_cache; 53 __u64 nr_dirty; 54 __u64 nr_writeback; 55 __u64 nr_evicted; 56 __u64 nr_recently_evicted; 57 }; 58 59 #endif /* _LINUX_MMAN_H */ 60