These build errors only occur if one fails to first run "make headers". However, that is a non-obvious and instrusive requirement, and so there was a discussion on how to get rid of it [1]. This uses that solution. These two files were created by taking a snapshot of the generated header files that are created via "make headers". These two files were copied from ./usr/include/linux/ to ./tools/include/uapi/linux/ . That fixes the selftests/mm build on today's Arch Linux (which required the userfaultfd.h) and Ubuntu 23.04 (which additionally required memfd.h). [1] https://lore.kernel.org/all/783a4178-1dec-4e30-989a-5174b8176b09@redhat.com/
Showing the changes to tools/include/uapi/linux (2 of 2 files). Show all
Unified · Split
| @@ -0,0 +1,39 @@ | |||
| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ | ||
| 2 | #ifndef _LINUX_MEMFD_H | ||
| 3 | #define _LINUX_MEMFD_H | ||
| 4 | |||
| 5 | #include <asm-generic/hugetlb_encode.h> | ||
| 6 | |||
| 7 | /* flags for memfd_create(2) (unsigned int) */ | ||
| 8 | #define MFD_CLOEXEC 0x0001U | ||
| 9 | #define MFD_ALLOW_SEALING 0x0002U | ||
| 10 | #define MFD_HUGETLB 0x0004U | ||
| 11 | /* not executable and sealed to prevent changing to executable. */ | ||
| 12 | #define MFD_NOEXEC_SEAL 0x0008U | ||
| 13 | /* executable */ | ||
| 14 | #define MFD_EXEC 0x0010U | ||
| 15 | |||
| 16 | /* | ||
| 17 | * Huge page size encoding when MFD_HUGETLB is specified, and a huge page | ||
| 18 | * size other than the default is desired. See hugetlb_encode.h. | ||
| 19 | * All known huge page size encodings are provided here. It is the | ||
| 20 | * responsibility of the application to know which sizes are supported on | ||
| 21 | * the running system. See mmap(2) man page for details. | ||
| 22 | */ | ||
| 23 | #define MFD_HUGE_SHIFT HUGETLB_FLAG_ENCODE_SHIFT | ||
| 24 | #define MFD_HUGE_MASK HUGETLB_FLAG_ENCODE_MASK | ||
| 25 | |||
| 26 | #define MFD_HUGE_64KB HUGETLB_FLAG_ENCODE_64KB | ||
| 27 | #define MFD_HUGE_512KB HUGETLB_FLAG_ENCODE_512KB | ||
| 28 | #define MFD_HUGE_1MB HUGETLB_FLAG_ENCODE_1MB | ||
| 29 | #define MFD_HUGE_2MB HUGETLB_FLAG_ENCODE_2MB | ||
| 30 | #define MFD_HUGE_8MB HUGETLB_FLAG_ENCODE_8MB | ||
| 31 | #define MFD_HUGE_16MB HUGETLB_FLAG_ENCODE_16MB | ||
| 32 | #define MFD_HUGE_32MB HUGETLB_FLAG_ENCODE_32MB | ||
| 33 | #define MFD_HUGE_256MB HUGETLB_FLAG_ENCODE_256MB | ||
| 34 | #define MFD_HUGE_512MB HUGETLB_FLAG_ENCODE_512MB | ||
| 35 | #define MFD_HUGE_1GB HUGETLB_FLAG_ENCODE_1GB | ||
| 36 | #define MFD_HUGE_2GB HUGETLB_FLAG_ENCODE_2GB | ||
| 37 | #define MFD_HUGE_16GB HUGETLB_FLAG_ENCODE_16GB | ||
| 38 | |||
| 39 | #endif /* _LINUX_MEMFD_H */ | ||
| @@ -0,0 +1,386 @@ | |||
| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ | ||
| 2 | /* | ||
| 3 | * include/linux/userfaultfd.h | ||
| 4 | * | ||
| 5 | * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org> | ||
| 6 | * Copyright (C) 2015 Red Hat, Inc. | ||
| 7 | * | ||
| 8 | */ | ||
| 9 | |||
| 10 | #ifndef _LINUX_USERFAULTFD_H | ||
| 11 | #define _LINUX_USERFAULTFD_H | ||
| 12 | |||
| 13 | #include <linux/types.h> | ||
| 14 | |||
| 15 | /* ioctls for /dev/userfaultfd */ | ||
| 16 | #define USERFAULTFD_IOC 0xAA | ||
| 17 | #define USERFAULTFD_IOC_NEW _IO(USERFAULTFD_IOC, 0x00) | ||
| 18 | |||
| 19 | /* | ||
| 20 | * If the UFFDIO_API is upgraded someday, the UFFDIO_UNREGISTER and | ||
| 21 | * UFFDIO_WAKE ioctls should be defined as _IOW and not as _IOR. In | ||
| 22 | * userfaultfd.h we assumed the kernel was reading (instead _IOC_READ | ||
| 23 | * means the userland is reading). | ||
| 24 | */ | ||
| 25 | #define UFFD_API ((__u64)0xAA) | ||
| 26 | #define UFFD_API_REGISTER_MODES (UFFDIO_REGISTER_MODE_MISSING | \ | ||
| 27 | UFFDIO_REGISTER_MODE_WP | \ | ||
| 28 | UFFDIO_REGISTER_MODE_MINOR) | ||
| 29 | #define UFFD_API_FEATURES (UFFD_FEATURE_PAGEFAULT_FLAG_WP | \ | ||
| 30 | UFFD_FEATURE_EVENT_FORK | \ | ||
| 31 | UFFD_FEATURE_EVENT_REMAP | \ | ||
| 32 | UFFD_FEATURE_EVENT_REMOVE | \ | ||
| 33 | UFFD_FEATURE_EVENT_UNMAP | \ | ||
| 34 | UFFD_FEATURE_MISSING_HUGETLBFS | \ | ||
| 35 | UFFD_FEATURE_MISSING_SHMEM | \ | ||
| 36 | UFFD_FEATURE_SIGBUS | \ | ||
| 37 | UFFD_FEATURE_THREAD_ID | \ | ||
| 38 | UFFD_FEATURE_MINOR_HUGETLBFS | \ | ||
| 39 | UFFD_FEATURE_MINOR_SHMEM | \ | ||
| 40 | UFFD_FEATURE_EXACT_ADDRESS | \ | ||
| 41 | UFFD_FEATURE_WP_HUGETLBFS_SHMEM | \ | ||
| 42 | UFFD_FEATURE_WP_UNPOPULATED | \ | ||
| 43 | UFFD_FEATURE_POISON | \ | ||
| 44 | UFFD_FEATURE_WP_ASYNC | \ | ||
| 45 | UFFD_FEATURE_MOVE) | ||
| 46 | #define UFFD_API_IOCTLS \ | ||
| 47 | ((__u64)1 << _UFFDIO_REGISTER | \ | ||
| 48 | (__u64)1 << _UFFDIO_UNREGISTER | \ | ||
| 49 | (__u64)1 << _UFFDIO_API) | ||
| 50 | #define UFFD_API_RANGE_IOCTLS \ | ||
| 51 | ((__u64)1 << _UFFDIO_WAKE | \ | ||
| 52 | (__u64)1 << _UFFDIO_COPY | \ | ||
| 53 | (__u64)1 << _UFFDIO_ZEROPAGE | \ | ||
| 54 | (__u64)1 << _UFFDIO_MOVE | \ | ||
| 55 | (__u64)1 << _UFFDIO_WRITEPROTECT | \ | ||
| 56 | (__u64)1 << _UFFDIO_CONTINUE | \ | ||
| 57 | (__u64)1 << _UFFDIO_POISON) | ||
| 58 | #define UFFD_API_RANGE_IOCTLS_BASIC \ | ||
| 59 | ((__u64)1 << _UFFDIO_WAKE | \ | ||
| 60 | (__u64)1 << _UFFDIO_COPY | \ | ||
| 61 | (__u64)1 << _UFFDIO_WRITEPROTECT | \ | ||
| 62 | (__u64)1 << _UFFDIO_CONTINUE | \ | ||
| 63 | (__u64)1 << _UFFDIO_POISON) | ||
| 64 | |||
| 65 | /* | ||
| 66 | * Valid ioctl command number range with this API is from 0x00 to | ||
| 67 | * 0x3F. UFFDIO_API is the fixed number, everything else can be | ||
| 68 | * changed by implementing a different UFFD_API. If sticking to the | ||
| 69 | * same UFFD_API more ioctl can be added and userland will be aware of | ||
| 70 | * which ioctl the running kernel implements through the ioctl command | ||
| 71 | * bitmask written by the UFFDIO_API. | ||
| 72 | */ | ||
| 73 | #define _UFFDIO_REGISTER (0x00) | ||
| 74 | #define _UFFDIO_UNREGISTER (0x01) | ||
| 75 | #define _UFFDIO_WAKE (0x02) | ||
| 76 | #define _UFFDIO_COPY (0x03) | ||
| 77 | #define _UFFDIO_ZEROPAGE (0x04) | ||
| 78 | #define _UFFDIO_MOVE (0x05) | ||
| 79 | #define _UFFDIO_WRITEPROTECT (0x06) | ||
| 80 | #define _UFFDIO_CONTINUE (0x07) | ||
| 81 | #define _UFFDIO_POISON (0x08) | ||
| 82 | #define _UFFDIO_API (0x3F) | ||
| 83 | |||
| 84 | /* userfaultfd ioctl ids */ | ||
| 85 | #define UFFDIO 0xAA | ||
| 86 | #define UFFDIO_API _IOWR(UFFDIO, _UFFDIO_API, \ | ||
| 87 | struct uffdio_api) | ||
| 88 | #define UFFDIO_REGISTER _IOWR(UFFDIO, _UFFDIO_REGISTER, \ | ||
| 89 | struct uffdio_register) | ||
| 90 | #define UFFDIO_UNREGISTER _IOR(UFFDIO, _UFFDIO_UNREGISTER, \ | ||
| 91 | struct uffdio_range) | ||
| 92 | #define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, \ | ||
| 93 | struct uffdio_range) | ||
| 94 | #define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, \ | ||
| 95 | struct uffdio_copy) | ||
| 96 | #define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, \ | ||
| 97 | struct uffdio_zeropage) | ||
| 98 | #define UFFDIO_MOVE _IOWR(UFFDIO, _UFFDIO_MOVE, \ | ||
| 99 | struct uffdio_move) | ||
| 100 | #define UFFDIO_WRITEPROTECT _IOWR(UFFDIO, _UFFDIO_WRITEPROTECT, \ | ||
| 101 | struct uffdio_writeprotect) | ||
| 102 | #define UFFDIO_CONTINUE _IOWR(UFFDIO, _UFFDIO_CONTINUE, \ | ||
| 103 | struct uffdio_continue) | ||
| 104 | #define UFFDIO_POISON _IOWR(UFFDIO, _UFFDIO_POISON, \ | ||
| 105 | struct uffdio_poison) | ||
| 106 | |||
| 107 | /* read() structure */ | ||
| 108 | struct uffd_msg { | ||
| 109 | __u8 event; | ||
| 110 | |||
| 111 | __u8 reserved1; | ||
| 112 | __u16 reserved2; | ||
| 113 | __u32 reserved3; | ||
| 114 | |||
| 115 | union { | ||
| 116 | struct { | ||
| 117 | __u64 flags; | ||
| 118 | __u64 address; | ||
| 119 | union { | ||
| 120 | __u32 ptid; | ||
| 121 | } feat; | ||
| 122 | } pagefault; | ||
| 123 | |||
| 124 | struct { | ||
| 125 | __u32 ufd; | ||
| 126 | } fork; | ||
| 127 | |||
| 128 | struct { | ||
| 129 | __u64 from; | ||
| 130 | __u64 to; | ||
| 131 | __u64 len; | ||
| 132 | } remap; | ||
| 133 | |||
| 134 | struct { | ||
| 135 | __u64 start; | ||
| 136 | __u64 end; | ||
| 137 | } remove; | ||
| 138 | |||
| 139 | struct { | ||
| 140 | /* unused reserved fields */ | ||
| 141 | __u64 reserved1; | ||
| 142 | __u64 reserved2; | ||
| 143 | __u64 reserved3; | ||
| 144 | } reserved; | ||
| 145 | } arg; | ||
| 146 | } __attribute__((packed)); | ||
| 147 | |||
| 148 | /* | ||
| 149 | * Start at 0x12 and not at 0 to be more strict against bugs. | ||
| 150 | */ | ||
| 151 | #define UFFD_EVENT_PAGEFAULT 0x12 | ||
| 152 | #define UFFD_EVENT_FORK 0x13 | ||
| 153 | #define UFFD_EVENT_REMAP 0x14 | ||
| 154 | #define UFFD_EVENT_REMOVE 0x15 | ||
| 155 | #define UFFD_EVENT_UNMAP 0x16 | ||
| 156 | |||
| 157 | /* flags for UFFD_EVENT_PAGEFAULT */ | ||
| 158 | #define UFFD_PAGEFAULT_FLAG_WRITE (1<<0) /* If this was a write fault */ | ||
| 159 | #define UFFD_PAGEFAULT_FLAG_WP (1<<1) /* If reason is VM_UFFD_WP */ | ||
| 160 | #define UFFD_PAGEFAULT_FLAG_MINOR (1<<2) /* If reason is VM_UFFD_MINOR */ | ||
| 161 | |||
| 162 | struct uffdio_api { | ||
| 163 | /* userland asks for an API number and the features to enable */ | ||
| 164 | __u64 api; | ||
| 165 | /* | ||
| 166 | * Kernel answers below with the all available features for | ||
| 167 | * the API, this notifies userland of which events and/or | ||
| 168 | * which flags for each event are enabled in the current | ||
| 169 | * kernel. | ||
| 170 | * | ||
| 171 | * Note: UFFD_EVENT_PAGEFAULT and UFFD_PAGEFAULT_FLAG_WRITE | ||
| 172 | * are to be considered implicitly always enabled in all kernels as | ||
| 173 | * long as the uffdio_api.api requested matches UFFD_API. | ||
| 174 | * | ||
| 175 | * UFFD_FEATURE_MISSING_HUGETLBFS means an UFFDIO_REGISTER | ||
| 176 | * with UFFDIO_REGISTER_MODE_MISSING mode will succeed on | ||
| 177 | * hugetlbfs virtual memory ranges. Adding or not adding | ||
| 178 | * UFFD_FEATURE_MISSING_HUGETLBFS to uffdio_api.features has | ||
| 179 | * no real functional effect after UFFDIO_API returns, but | ||
| 180 | * it's only useful for an initial feature set probe at | ||
| 181 | * UFFDIO_API time. There are two ways to use it: | ||
| 182 | * | ||
| 183 | * 1) by adding UFFD_FEATURE_MISSING_HUGETLBFS to the | ||
| 184 | * uffdio_api.features before calling UFFDIO_API, an error | ||
| 185 | * will be returned by UFFDIO_API on a kernel without | ||
| 186 | * hugetlbfs missing support | ||
| 187 | * | ||
| 188 | * 2) the UFFD_FEATURE_MISSING_HUGETLBFS can not be added in | ||
| 189 | * uffdio_api.features and instead it will be set by the | ||
| 190 | * kernel in the uffdio_api.features if the kernel supports | ||
| 191 | * it, so userland can later check if the feature flag is | ||
| 192 | * present in uffdio_api.features after UFFDIO_API | ||
| 193 | * succeeded. | ||
| 194 | * | ||
| 195 | * UFFD_FEATURE_MISSING_SHMEM works the same as | ||
| 196 | * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem | ||
| 197 | * (i.e. tmpfs and other shmem based APIs). | ||
| 198 | * | ||
| 199 | * UFFD_FEATURE_SIGBUS feature means no page-fault | ||
| 200 | * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead | ||
| 201 | * a SIGBUS signal will be sent to the faulting process. | ||
| 202 | * | ||
| 203 | * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will | ||
| 204 | * be returned, if feature is not requested 0 will be returned. | ||
| 205 | * | ||
| 206 | * UFFD_FEATURE_MINOR_HUGETLBFS indicates that minor faults | ||
| 207 | * can be intercepted (via REGISTER_MODE_MINOR) for | ||
| 208 | * hugetlbfs-backed pages. | ||
| 209 | * | ||
| 210 | * UFFD_FEATURE_MINOR_SHMEM indicates the same support as | ||
| 211 | * UFFD_FEATURE_MINOR_HUGETLBFS, but for shmem-backed pages instead. | ||
| 212 | * | ||
| 213 | * UFFD_FEATURE_EXACT_ADDRESS indicates that the exact address of page | ||
| 214 | * faults would be provided and the offset within the page would not be | ||
| 215 | * masked. | ||
| 216 | * | ||
| 217 | * UFFD_FEATURE_WP_HUGETLBFS_SHMEM indicates that userfaultfd | ||
| 218 | * write-protection mode is supported on both shmem and hugetlbfs. | ||
| 219 | * | ||
| 220 | * UFFD_FEATURE_WP_UNPOPULATED indicates that userfaultfd | ||
| 221 | * write-protection mode will always apply to unpopulated pages | ||
| 222 | * (i.e. empty ptes). This will be the default behavior for shmem | ||
| 223 | * & hugetlbfs, so this flag only affects anonymous memory behavior | ||
| 224 | * when userfault write-protection mode is registered. | ||
| 225 | * | ||
| 226 | * UFFD_FEATURE_WP_ASYNC indicates that userfaultfd write-protection | ||
| 227 | * asynchronous mode is supported in which the write fault is | ||
| 228 | * automatically resolved and write-protection is un-set. | ||
| 229 | * It implies UFFD_FEATURE_WP_UNPOPULATED. | ||
| 230 | * | ||
| 231 | * UFFD_FEATURE_MOVE indicates that the kernel supports moving an | ||
| 232 | * existing page contents from userspace. | ||
| 233 | */ | ||
| 234 | #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0) | ||
| 235 | #define UFFD_FEATURE_EVENT_FORK (1<<1) | ||
| 236 | #define UFFD_FEATURE_EVENT_REMAP (1<<2) | ||
| 237 | #define UFFD_FEATURE_EVENT_REMOVE (1<<3) | ||
| 238 | #define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4) | ||
| 239 | #define UFFD_FEATURE_MISSING_SHMEM (1<<5) | ||
| 240 | #define UFFD_FEATURE_EVENT_UNMAP (1<<6) | ||
| 241 | #define UFFD_FEATURE_SIGBUS (1<<7) | ||
| 242 | #define UFFD_FEATURE_THREAD_ID (1<<8) | ||
| 243 | #define UFFD_FEATURE_MINOR_HUGETLBFS (1<<9) | ||
| 244 | #define UFFD_FEATURE_MINOR_SHMEM (1<<10) | ||
| 245 | #define UFFD_FEATURE_EXACT_ADDRESS (1<<11) | ||
| 246 | #define UFFD_FEATURE_WP_HUGETLBFS_SHMEM (1<<12) | ||
| 247 | #define UFFD_FEATURE_WP_UNPOPULATED (1<<13) | ||
| 248 | #define UFFD_FEATURE_POISON (1<<14) | ||
| 249 | #define UFFD_FEATURE_WP_ASYNC (1<<15) | ||
| 250 | #define UFFD_FEATURE_MOVE (1<<16) | ||
| 251 | __u64 features; | ||
| 252 | |||
| 253 | __u64 ioctls; | ||
| 254 | }; | ||
| 255 | |||
| 256 | struct uffdio_range { | ||
| 257 | __u64 start; | ||
| 258 | __u64 len; | ||
| 259 | }; | ||
| 260 | |||
| 261 | struct uffdio_register { | ||
| 262 | struct uffdio_range range; | ||
| 263 | #define UFFDIO_REGISTER_MODE_MISSING ((__u64)1<<0) | ||
| 264 | #define UFFDIO_REGISTER_MODE_WP ((__u64)1<<1) | ||
| 265 | #define UFFDIO_REGISTER_MODE_MINOR ((__u64)1<<2) | ||
| 266 | __u64 mode; | ||
| 267 | |||
| 268 | /* | ||
| 269 | * kernel answers which ioctl commands are available for the | ||
| 270 | * range, keep at the end as the last 8 bytes aren't read. | ||
| 271 | */ | ||
| 272 | __u64 ioctls; | ||
| 273 | }; | ||
| 274 | |||
| 275 | struct uffdio_copy { | ||
| 276 | __u64 dst; | ||
| 277 | __u64 src; | ||
| 278 | __u64 len; | ||
| 279 | #define UFFDIO_COPY_MODE_DONTWAKE ((__u64)1<<0) | ||
| 280 | /* | ||
| 281 | * UFFDIO_COPY_MODE_WP will map the page write protected on | ||
| 282 | * the fly. UFFDIO_COPY_MODE_WP is available only if the | ||
| 283 | * write protected ioctl is implemented for the range | ||
| 284 | * according to the uffdio_register.ioctls. | ||
| 285 | */ | ||
| 286 | #define UFFDIO_COPY_MODE_WP ((__u64)1<<1) | ||
| 287 | __u64 mode; | ||
| 288 | |||
| 289 | /* | ||
| 290 | * "copy" is written by the ioctl and must be at the end: the | ||
| 291 | * copy_from_user will not read the last 8 bytes. | ||
| 292 | */ | ||
| 293 | __s64 copy; | ||
| 294 | }; | ||
| 295 | |||
| 296 | struct uffdio_zeropage { | ||
| 297 | struct uffdio_range range; | ||
| 298 | #define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64)1<<0) | ||
| 299 | __u64 mode; | ||
| 300 | |||
| 301 | /* | ||
| 302 | * "zeropage" is written by the ioctl and must be at the end: | ||
| 303 | * the copy_from_user will not read the last 8 bytes. | ||
| 304 | */ | ||
| 305 | __s64 zeropage; | ||
| 306 | }; | ||
| 307 | |||
| 308 | struct uffdio_writeprotect { | ||
| 309 | struct uffdio_range range; | ||
| 310 | /* | ||
| 311 | * UFFDIO_WRITEPROTECT_MODE_WP: set the flag to write protect a range, | ||
| 312 | * unset the flag to undo protection of a range which was previously | ||
| 313 | * write protected. | ||
| 314 | * | ||
| 315 | * UFFDIO_WRITEPROTECT_MODE_DONTWAKE: set the flag to avoid waking up | ||
| 316 | * any wait thread after the operation succeeds. | ||
| 317 | * | ||
| 318 | * NOTE: Write protecting a region (WP=1) is unrelated to page faults, | ||
| 319 | * therefore DONTWAKE flag is meaningless with WP=1. Removing write | ||
| 320 | * protection (WP=0) in response to a page fault wakes the faulting | ||
| 321 | * task unless DONTWAKE is set. | ||
| 322 | */ | ||
| 323 | #define UFFDIO_WRITEPROTECT_MODE_WP ((__u64)1<<0) | ||
| 324 | #define UFFDIO_WRITEPROTECT_MODE_DONTWAKE ((__u64)1<<1) | ||
| 325 | __u64 mode; | ||
| 326 | }; | ||
| 327 | |||
| 328 | struct uffdio_continue { | ||
| 329 | struct uffdio_range range; | ||
| 330 | #define UFFDIO_CONTINUE_MODE_DONTWAKE ((__u64)1<<0) | ||
| 331 | /* | ||
| 332 | * UFFDIO_CONTINUE_MODE_WP will map the page write protected on | ||
| 333 | * the fly. UFFDIO_CONTINUE_MODE_WP is available only if the | ||
| 334 | * write protected ioctl is implemented for the range | ||
| 335 | * according to the uffdio_register.ioctls. | ||
| 336 | */ | ||
| 337 | #define UFFDIO_CONTINUE_MODE_WP ((__u64)1<<1) | ||
| 338 | __u64 mode; | ||
| 339 | |||
| 340 | /* | ||
| 341 | * Fields below here are written by the ioctl and must be at the end: | ||
| 342 | * the copy_from_user will not read past here. | ||
| 343 | */ | ||
| 344 | __s64 mapped; | ||
| 345 | }; | ||
| 346 | |||
| 347 | struct uffdio_poison { | ||
| 348 | struct uffdio_range range; | ||
| 349 | #define UFFDIO_POISON_MODE_DONTWAKE ((__u64)1<<0) | ||
| 350 | __u64 mode; | ||
| 351 | |||
| 352 | /* | ||
| 353 | * Fields below here are written by the ioctl and must be at the end: | ||
| 354 | * the copy_from_user will not read past here. | ||
| 355 | */ | ||
| 356 | __s64 updated; | ||
| 357 | }; | ||
| 358 | |||
| 359 | struct uffdio_move { | ||
| 360 | __u64 dst; | ||
| 361 | __u64 src; | ||
| 362 | __u64 len; | ||
| 363 | /* | ||
| 364 | * Especially if used to atomically remove memory from the | ||
| 365 | * address space the wake on the dst range is not needed. | ||
| 366 | */ | ||
| 367 | #define UFFDIO_MOVE_MODE_DONTWAKE ((__u64)1<<0) | ||
| 368 | #define UFFDIO_MOVE_MODE_ALLOW_SRC_HOLES ((__u64)1<<1) | ||
| 369 | __u64 mode; | ||
| 370 | /* | ||
| 371 | * "move" is written by the ioctl and must be at the end: the | ||
| 372 | * copy_from_user will not read the last 8 bytes. | ||
| 373 | */ | ||
| 374 | __s64 move; | ||
| 375 | }; | ||
| 376 | |||
| 377 | /* | ||
| 378 | * Flags for the userfaultfd(2) system call itself. | ||
| 379 | */ | ||
| 380 | |||
| 381 | /* | ||
| 382 | * Create a userfaultfd that can handle page faults only in user mode. | ||
| 383 | */ | ||
| 384 | #define UFFD_USER_MODE_ONLY 1 | ||
| 385 | |||
| 386 | #endif /* _LINUX_USERFAULTFD_H */ | ||