18cf108c5SZhang Yi /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 28cf108c5SZhang Yi /* 38cf108c5SZhang Yi * This file is subject to the terms and conditions of the GNU General Public 48cf108c5SZhang Yi * License. See the file "COPYING" in the main directory of this archive 58cf108c5SZhang Yi * for more details. 68cf108c5SZhang Yi * 78cf108c5SZhang Yi * Copyright (C) 1995, 1999, 2002 by Ralf Baechle 88cf108c5SZhang Yi */ 98cf108c5SZhang Yi #ifndef _ASM_MMAN_H 108cf108c5SZhang Yi #define _ASM_MMAN_H 118cf108c5SZhang Yi 128cf108c5SZhang Yi /* 138cf108c5SZhang Yi * Protections are chosen from these bits, OR'd together. The 148cf108c5SZhang Yi * implementation does not necessarily support PROT_EXEC or PROT_WRITE 158cf108c5SZhang Yi * without PROT_READ. The only guarantees are that no writing will be 168cf108c5SZhang Yi * allowed without PROT_WRITE and no access will be allowed for PROT_NONE. 178cf108c5SZhang Yi */ 188cf108c5SZhang Yi #define PROT_NONE 0x00 /* page can not be accessed */ 198cf108c5SZhang Yi #define PROT_READ 0x01 /* page can be read */ 208cf108c5SZhang Yi #define PROT_WRITE 0x02 /* page can be written */ 218cf108c5SZhang Yi #define PROT_EXEC 0x04 /* page can be executed */ 228cf108c5SZhang Yi /* 0x08 reserved for PROT_EXEC_NOFLUSH */ 238cf108c5SZhang Yi #define PROT_SEM 0x10 /* page may be used for atomic ops */ 248cf108c5SZhang Yi #define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ 258cf108c5SZhang Yi #define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ 268cf108c5SZhang Yi 278cf108c5SZhang Yi /* 288cf108c5SZhang Yi * Flags for mmap 298cf108c5SZhang Yi */ 30d9cb4336SCornelia Huck /* 0x01 - 0x03 are defined in linux/mman.h */ 318cf108c5SZhang Yi #define MAP_TYPE 0x00f /* Mask for type of mapping */ 328cf108c5SZhang Yi #define MAP_FIXED 0x010 /* Interpret addr exactly */ 338cf108c5SZhang Yi 348cf108c5SZhang Yi /* not used by linux, but here to make sure we don't clash with ABI defines */ 358cf108c5SZhang Yi #define MAP_RENAME 0x020 /* Assign page to file */ 368cf108c5SZhang Yi #define MAP_AUTOGROW 0x040 /* File may grow by writing */ 378cf108c5SZhang Yi #define MAP_LOCAL 0x080 /* Copy on fork/sproc */ 388cf108c5SZhang Yi #define MAP_AUTORSRV 0x100 /* Logical swap reserved on demand */ 398cf108c5SZhang Yi 408cf108c5SZhang Yi /* These are linux-specific */ 418cf108c5SZhang Yi #define MAP_NORESERVE 0x0400 /* don't check for reservations */ 428cf108c5SZhang Yi #define MAP_ANONYMOUS 0x0800 /* don't use a file */ 438cf108c5SZhang Yi #define MAP_GROWSDOWN 0x1000 /* stack-like segment */ 448cf108c5SZhang Yi #define MAP_DENYWRITE 0x2000 /* ETXTBSY */ 458cf108c5SZhang Yi #define MAP_EXECUTABLE 0x4000 /* mark it as an executable */ 468cf108c5SZhang Yi #define MAP_LOCKED 0x8000 /* pages are locked */ 478cf108c5SZhang Yi #define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ 488cf108c5SZhang Yi #define MAP_NONBLOCK 0x20000 /* do not block on IO */ 498cf108c5SZhang Yi #define MAP_STACK 0x40000 /* give out an address that is best suited for process/thread stacks */ 508cf108c5SZhang Yi #define MAP_HUGETLB 0x80000 /* create a huge page mapping */ 518cf108c5SZhang Yi #define MAP_FIXED_NOREPLACE 0x100000 /* MAP_FIXED which doesn't unmap underlying mapping */ 528cf108c5SZhang Yi 538cf108c5SZhang Yi /* 548cf108c5SZhang Yi * Flags for msync 558cf108c5SZhang Yi */ 568cf108c5SZhang Yi #define MS_ASYNC 0x0001 /* sync memory asynchronously */ 578cf108c5SZhang Yi #define MS_INVALIDATE 0x0002 /* invalidate mappings & caches */ 588cf108c5SZhang Yi #define MS_SYNC 0x0004 /* synchronous memory sync */ 598cf108c5SZhang Yi 608cf108c5SZhang Yi /* 618cf108c5SZhang Yi * Flags for mlockall 628cf108c5SZhang Yi */ 638cf108c5SZhang Yi #define MCL_CURRENT 1 /* lock all current mappings */ 648cf108c5SZhang Yi #define MCL_FUTURE 2 /* lock all future mappings */ 658cf108c5SZhang Yi #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ 668cf108c5SZhang Yi 678cf108c5SZhang Yi /* 688cf108c5SZhang Yi * Flags for mlock 698cf108c5SZhang Yi */ 708cf108c5SZhang Yi #define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ 718cf108c5SZhang Yi 728cf108c5SZhang Yi #define MADV_NORMAL 0 /* no further special treatment */ 738cf108c5SZhang Yi #define MADV_RANDOM 1 /* expect random page references */ 748cf108c5SZhang Yi #define MADV_SEQUENTIAL 2 /* expect sequential page references */ 758cf108c5SZhang Yi #define MADV_WILLNEED 3 /* will need these pages */ 768cf108c5SZhang Yi #define MADV_DONTNEED 4 /* don't need these pages */ 778cf108c5SZhang Yi 788cf108c5SZhang Yi /* common parameters: try to keep these consistent across architectures */ 798cf108c5SZhang Yi #define MADV_FREE 8 /* free pages only if memory pressure */ 808cf108c5SZhang Yi #define MADV_REMOVE 9 /* remove these pages & resources */ 818cf108c5SZhang Yi #define MADV_DONTFORK 10 /* don't inherit across fork */ 828cf108c5SZhang Yi #define MADV_DOFORK 11 /* do inherit across fork */ 838cf108c5SZhang Yi 848cf108c5SZhang Yi #define MADV_MERGEABLE 12 /* KSM may merge identical pages */ 858cf108c5SZhang Yi #define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ 868cf108c5SZhang Yi #define MADV_HWPOISON 100 /* poison a page for testing */ 878cf108c5SZhang Yi 888cf108c5SZhang Yi #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ 898cf108c5SZhang Yi #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ 908cf108c5SZhang Yi 91*6a02465fSDaniel Henrique Barboza #define MADV_DONTDUMP 16 /* Explicitly exclude from core dump, 928cf108c5SZhang Yi overrides the coredump filter bits */ 938cf108c5SZhang Yi #define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ 948cf108c5SZhang Yi 958cf108c5SZhang Yi #define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ 968cf108c5SZhang Yi #define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ 978cf108c5SZhang Yi 98f363d039SEric Auger #define MADV_COLD 20 /* deactivate these pages */ 99f363d039SEric Auger #define MADV_PAGEOUT 21 /* reclaim these pages */ 100f363d039SEric Auger 101327d4b7fSBharata B Rao #define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */ 102327d4b7fSBharata B Rao #define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */ 103327d4b7fSBharata B Rao 104e4082063SAlex Williamson #define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */ 105e4082063SAlex Williamson 10693e0932bSPeter Xu #define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */ 10793e0932bSPeter Xu 1088cf108c5SZhang Yi /* compatibility flags */ 1098cf108c5SZhang Yi #define MAP_FILE 0 1108cf108c5SZhang Yi 1118cf108c5SZhang Yi #define PKEY_DISABLE_ACCESS 0x1 1128cf108c5SZhang Yi #define PKEY_DISABLE_WRITE 0x2 1138cf108c5SZhang Yi #define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ 1148cf108c5SZhang Yi PKEY_DISABLE_WRITE) 1158cf108c5SZhang Yi 1168cf108c5SZhang Yi #endif /* _ASM_MMAN_H */ 117