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Searched refs:uffd (Results 1 – 25 of 25) sorted by relevance

/linux/tools/testing/selftests/bpf/prog_tests/
H A Dbpf_mod_race.c67 int uffd; in test_setup_uffd() local
69 uffd = sys_userfaultfd(O_CLOEXEC); in test_setup_uffd()
70 if (uffd < 0) in test_setup_uffd()
75 if (ioctl(uffd, UFFDIO_API, &uffd_api)) { in test_setup_uffd()
76 close(uffd); in test_setup_uffd()
83 if (ioctl(uffd, UFFDIO_REGISTER, &uffd_register)) { in test_setup_uffd()
84 close(uffd); in test_setup_uffd()
87 return uffd; in test_setup_uffd()
97 int uffd, ret; in test_bpf_mod_race_config() local
120 uffd = test_setup_uffd(fault_addr); in test_bpf_mod_race_config()
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/linux/tools/testing/selftests/powerpc/tm/
H A Dtm-signal-pagefault.c86 long uffd; /* userfaultfd file descriptor */ in fault_handler_thread() local
91 uffd = (long) arg; in fault_handler_thread()
94 pollfd.fd = uffd; in fault_handler_thread()
101 nread = read(uffd, &msg, sizeof(msg)); in fault_handler_thread()
130 if (ioctl(uffd, UFFDIO_COPY, &uffdio_copy) == -1) { in fault_handler_thread()
139 long uffd; /* userfaultfd file descriptor */ in setup_uf_mem() local
148 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in setup_uf_mem()
149 if (uffd == -1) { in setup_uf_mem()
155 if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) { in setup_uf_mem()
180 if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register) == -1) { in setup_uf_mem()
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/linux/tools/testing/selftests/mm/
H A Duffd-common.c261 gopts->uffd = uffd_open(UFFD_FLAGS); in userfaultfd_open()
262 if (gopts->uffd < 0) in userfaultfd_open()
264 gopts->uffd_flags = fcntl(gopts->uffd, F_GETFD, NULL); in userfaultfd_open()
268 if (ioctl(gopts->uffd, UFFDIO_API, &uffdio_api)) in userfaultfd_open()
305 if (gopts->uffd != -1) { in uffd_test_ctx_clear()
306 if (close(gopts->uffd)) in uffd_test_ctx_clear()
308 gopts->uffd = -1; in uffd_test_ctx_clear()
445 int ret = read(gopts->uffd, msg, sizeof(*msg)); in uffd_read_msg()
470 wp_range(gopts->uffd, msg->arg.pagefault.address, gopts->page_size, false); in uffd_handle_page_fault()
493 continue_range(gopts->uffd, msg->arg.pagefault.address, gopts->page_size, in uffd_handle_page_fault()
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H A Duffd-unit-tests.c132 int uffd; in test_uffd_api() local
138 uffd = uffd_open_dev(UFFD_FLAGS); in test_uffd_api()
140 uffd = uffd_open_sys(UFFD_FLAGS); in test_uffd_api()
141 if (uffd < 0) { in test_uffd_api()
149 if (ioctl(uffd, UFFDIO_API, &uffdio_api) == 0) { in test_uffd_api()
157 if (ioctl(uffd, UFFDIO_API, &uffdio_api) == 0) { in test_uffd_api()
165 if (ioctl(uffd, UFFDIO_API, &uffdio_api)) { in test_uffd_api()
172 if (ioctl(uffd, UFFDIO_API, &uffdio_api) == 0) { in test_uffd_api()
179 close(uffd); in test_uffd_api()
343 if (uffd_register(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size, in uffd_wp_unpopulated_test()
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H A DMakefile93 TEST_GEN_FILES += uffd-stress
94 TEST_GEN_FILES += uffd-unit-tests
95 TEST_GEN_FILES += uffd-wp-mremap
166 $(OUTPUT)/uffd-stress: uffd-common.c
167 $(OUTPUT)/uffd-unit-tests: uffd-common.c
168 $(OUTPUT)/uffd-wp-mremap: uffd-common.c
H A Dksm_functional_tests.c296 int uffd; in test_unmerge_uffd_wp() local
305 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in test_unmerge_uffd_wp()
306 if (uffd < 0) { in test_unmerge_uffd_wp()
314 if (ioctl(uffd, UFFDIO_API, &uffdio_api) < 0) { in test_unmerge_uffd_wp()
332 close(uffd); in test_unmerge_uffd_wp()
333 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in test_unmerge_uffd_wp()
334 if (uffd < 0) { in test_unmerge_uffd_wp()
342 if (ioctl(uffd, UFFDIO_API, &uffdio_api) < 0) { in test_unmerge_uffd_wp()
348 if (uffd_register(uffd, map, size, false, true, false)) { in test_unmerge_uffd_wp()
357 if (ioctl(uffd, UFFDIO_WRITEPROTECT, &uffd_writeprotect)) { in test_unmerge_uffd_wp()
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H A Dhugepage-mremap.c64 long uffd; /* userfaultfd file descriptor */ in register_region_with_uffd() local
68 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in register_region_with_uffd()
69 if (uffd == -1) { in register_region_with_uffd()
85 if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) in register_region_with_uffd()
105 if (uffd_register(uffd, addr, len, true, false, false)) in register_region_with_uffd()
H A Dmkdirty.c275 int uffd; in test_uffdio_copy() local
288 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in test_uffdio_copy()
289 if (uffd < 0) { in test_uffdio_copy()
296 if (ioctl(uffd, UFFDIO_API, &uffdio_api) < 0) { in test_uffdio_copy()
304 if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) { in test_uffdio_copy()
314 if (ioctl(uffd, UFFDIO_COPY, &uffdio_copy)) { in test_uffdio_copy()
321 close(uffd); in test_uffdio_copy()
H A Duffd-stress.c180 wp_range(gopts->uffd, (unsigned long)gopts->area_dst + start_nr * gopts->page_size, in background_thread()
304 fcntl(gopts->uffd, F_SETFL, gopts->uffd_flags | O_NONBLOCK); in userfaultfd_stress()
306 fcntl(gopts->uffd, F_SETFL, gopts->uffd_flags & ~O_NONBLOCK); in userfaultfd_stress()
309 if (uffd_register(gopts->uffd, gopts->area_dst, mem_size, in userfaultfd_stress()
314 if (uffd_register(gopts->uffd, gopts->area_dst_alias, mem_size, in userfaultfd_stress()
355 wp_range(gopts->uffd, (unsigned long)gopts->area_dst, in userfaultfd_stress()
359 if (uffd_unregister(gopts->uffd, gopts->area_dst, mem_size)) in userfaultfd_stress()
362 if (uffd_unregister(gopts->uffd, gopts->area_dst_alias, mem_size)) in userfaultfd_stress()
442 close(gopts->uffd); in parse_test_type_arg()
443 gopts->uffd = -1; in parse_test_type_arg()
H A D.gitignore30 uffd-stress
31 uffd-unit-tests
32 uffd-wp-mremap
H A Duffd-wp-mremap.c187 if (uffd_register(gopts->uffd, mem, size, false, true, false)) { in test_one_folio()
194 if (ioctl(gopts->uffd, UFFDIO_WRITEPROTECT, &wp_prms)) { in test_one_folio()
241 if (gopts->uffd >= 0) { in test_one_folio()
242 close(gopts->uffd); in test_one_folio()
243 gopts->uffd = -1; in test_one_folio()
H A Dvm_util.h93 int uffd_register(int uffd, void *addr, uint64_t len,
95 int uffd_unregister(int uffd, void *addr, uint64_t len);
96 int uffd_register_with_ioctls(int uffd, void *addr, uint64_t len,
H A Dvm_util.c355 int uffd_register_with_ioctls(int uffd, void *addr, uint64_t len, in uffd_register_with_ioctls() argument
373 if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register) == -1) in uffd_register_with_ioctls()
381 int uffd_register(int uffd, void *addr, uint64_t len, in uffd_register() argument
384 return uffd_register_with_ioctls(uffd, addr, len, in uffd_register()
388 int uffd_unregister(int uffd, void *addr, uint64_t len) in uffd_unregister() argument
393 if (ioctl(uffd, UFFDIO_UNREGISTER, &range) == -1) in uffd_unregister()
H A Dmremap_test.c758 int uffd, err, i; in mremap_move_multi_invalid_vmas() local
765 uffd = syscall(__NR_userfaultfd, O_NONBLOCK); in mremap_move_multi_invalid_vmas()
766 if (uffd == -1) { in mremap_move_multi_invalid_vmas()
776 if (ioctl(uffd, UFFDIO_API, &api)) { in mremap_move_multi_invalid_vmas()
822 if (ioctl(uffd, UFFDIO_REGISTER, &reg) == -1) { in mremap_move_multi_invalid_vmas()
977 close(uffd); in mremap_move_multi_invalid_vmas()
H A Drun_vmtests.sh327 CATEGORY="userfaultfd" run_test ./uffd-unit-tests
328 uffd_stress_bin=./uffd-stress
358 CATEGORY="userfaultfd" run_test ./uffd-wp-mremap
H A Dguard-regions.c1480 TEST_F(guard_regions, uffd) in TEST_F() argument
1483 int uffd; in TEST_F() local
1497 uffd = userfaultfd(0); in TEST_F()
1498 if (uffd == -1) { in TEST_F()
1513 ASSERT_NE(uffd, -1); in TEST_F()
1515 ASSERT_EQ(ioctl(uffd, UFFDIO_API, &api), 0); in TEST_F()
1527 ASSERT_EQ(ioctl(uffd, UFFDIO_REGISTER, &reg), 0); in TEST_F()
1540 ASSERT_EQ(ioctl(uffd, UFFDIO_UNREGISTER, &range), 0); in TEST_F()
1541 close(uffd); in TEST_F()
H A Duffd-common.h62 int uffd, uffd_flags, finished, *pipefd, test_type; member
H A Dpagemap_ioctl.c37 int uffd; variable
97 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK | UFFD_USER_MODE_ONLY); in init_uffd()
98 if (uffd == -1) in init_uffd()
99 return uffd; in init_uffd()
104 if (ioctl(uffd, UFFDIO_API, &uffdio_api)) in init_uffd()
124 if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) in wp_init()
134 if (ioctl(uffd, UFFDIO_WRITEPROTECT, &wp)) in wp_init()
147 if (ioctl(uffd, UFFDIO_UNREGISTER, &uffdio_register.range)) in wp_free()
/linux/tools/testing/selftests/kvm/include/
H A Duserfaultfd_util.h15 typedef int (*uffd_handler_t)(int uffd_mode, int uffd, struct uffd_msg *msg);
19 int uffd; member
27 int uffd; member
40 void uffd_stop_demand_paging(struct uffd_desc *uffd);
/linux/tools/testing/selftests/x86/
H A Dtest_shadow_stack.c458 int uffd = *(int *)arg; in uffd_thread() local
463 ret = read(uffd, &msg, sizeof(msg)); in uffd_thread()
476 if (ioctl(uffd, UFFDIO_COPY, &req)) in uffd_thread()
489 int uffd; in test_userfaultfd() local
496 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in test_userfaultfd()
497 if (uffd < 0) { in test_userfaultfd()
506 if (ioctl(uffd, UFFDIO_API, &uffdio_api)) in test_userfaultfd()
512 if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register)) in test_userfaultfd()
515 if (pthread_create(&thread, NULL, &uffd_thread, &uffd)) in test_userfaultfd()
536 close(uffd); in test_userfaultfd()
/linux/tools/testing/selftests/kvm/
H A Ddemand_paging_test.c57 static int handle_uffd_page_request(int uffd_mode, int uffd, in handle_uffd_page_request() argument
76 r = ioctl(uffd, UFFDIO_COPY, &copy); in handle_uffd_page_request()
100 r = ioctl(uffd, UFFDIO_CONTINUE, &cont); in handle_uffd_page_request()
/linux/tools/testing/selftests/kvm/arm64/
H A Dpage_fault_test.c309 static int uffd_generic_handler(int uffd_mode, int uffd, struct uffd_msg *msg, in uffd_generic_handler() argument
329 ret = ioctl(uffd, UFFDIO_COPY, &copy); in uffd_generic_handler()
342 static int uffd_pt_handler(int mode, int uffd, struct uffd_msg *msg) in uffd_pt_handler() argument
344 return uffd_generic_handler(mode, uffd, msg, &pt_args); in uffd_pt_handler()
347 static int uffd_data_handler(int mode, int uffd, struct uffd_msg *msg) in uffd_data_handler() argument
349 return uffd_generic_handler(mode, uffd, msg, &data_args); in uffd_data_handler()
399 static int uffd_no_handler(int mode, int uffd, struct uffd_msg *msg) in uffd_no_handler() argument
789 .name = SCAT4(uffd, _access, _with_af, #_mark_cmd), \
/linux/Documentation/admin-guide/mm/
H A Duserfaultfd.rst187 uffd. You can supply as many pages as you want with these IOCTLs.
203 ``ioctl(uffd, UFFDIO_WRITEPROTECT, struct *uffdio_writeprotect)``
208 Then, in the thread reading from uffd the struct will have
210 ``ioctl(uffd, UFFDIO_WRITEPROTECT, struct *uffdio_writeprotect)``
213 allows you to do the bookkeeping about the write in the uffd reading
268 - Due to a reverted meaning of soft-dirty (page clean when uffd-wp bit
269 set; dirty when uffd-wp bit cleared), it has different semantics on
272 dirtying of memory by dropping uffd-wp bit during the procedure.
275 uffd-wp bit for the pages being interested in /proc/pagemap.
277 The page will not be under track of uffd-wp async mode until the page is
H A Dpagemap.rst22 * Bit 57 pte is uffd-wp write-protected (since 5.13) (see
303 "PAGE_IS_WRITTEN" category is used with uffd write protect-enabled ranges to
/linux/
H A DMAINTAINERS16767 F: tools/testing/selftests/mm/uffd-*.[ch]