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Searched refs:uffd (Results 1 – 8 of 8) sorted by relevance

/Linux-v6.1/tools/testing/selftests/bpf/prog_tests/
Dbpf_mod_race.c91 int uffd; in test_setup_uffd() local
93 uffd = sys_userfaultfd(O_CLOEXEC); in test_setup_uffd()
94 if (uffd < 0) in test_setup_uffd()
99 if (ioctl(uffd, UFFDIO_API, &uffd_api)) { in test_setup_uffd()
100 close(uffd); in test_setup_uffd()
107 if (ioctl(uffd, UFFDIO_REGISTER, &uffd_register)) { in test_setup_uffd()
108 close(uffd); in test_setup_uffd()
111 return uffd; in test_setup_uffd()
121 int uffd, ret; in test_bpf_mod_race_config() local
144 uffd = test_setup_uffd(fault_addr); in test_bpf_mod_race_config()
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/Linux-v6.1/tools/testing/selftests/powerpc/tm/
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-v6.1/tools/testing/selftests/kvm/
Ddemand_paging_test.c70 static int handle_uffd_page_request(int uffd_mode, int uffd, uint64_t addr) in handle_uffd_page_request() argument
87 r = ioctl(uffd, UFFDIO_COPY, &copy); in handle_uffd_page_request()
99 r = ioctl(uffd, UFFDIO_CONTINUE, &cont); in handle_uffd_page_request()
123 int uffd; member
131 int uffd = uffd_args->uffd; in uffd_handler_thread_fn() local
146 pollfd[0].fd = uffd; in uffd_handler_thread_fn()
180 r = read(uffd, &msg, sizeof(msg)); in uffd_handler_thread_fn()
199 r = handle_uffd_page_request(uffd_args->uffd_mode, uffd, addr); in uffd_handler_thread_fn()
220 int uffd; in setup_demand_paging() local
243 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in setup_demand_paging()
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/Linux-v6.1/tools/testing/selftests/vm/
Duserfaultfd.c101 static int uffd = -1; variable
456 uffd = __userfaultfd_open_dev(); in userfaultfd_open()
458 uffd = syscall(__NR_userfaultfd, UFFD_FLAGS); in userfaultfd_open()
459 if (uffd < 0) in userfaultfd_open()
463 uffd_flags = fcntl(uffd, F_GETFD, NULL); in userfaultfd_open()
467 if (ioctl(uffd, UFFDIO_API, &uffdio_api)) in userfaultfd_open()
503 if (uffd != -1) { in uffd_test_ctx_clear()
504 if (close(uffd)) in uffd_test_ctx_clear()
506 uffd = -1; in uffd_test_ctx_clear()
726 int ret = read(uffd, msg, sizeof(*msg)); in uffd_read_msg()
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Dhugepage-mremap.c60 long uffd; /* userfaultfd file descriptor */ in register_region_with_uffd() local
66 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in register_region_with_uffd()
67 if (uffd == -1) { in register_region_with_uffd()
74 if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) { in register_region_with_uffd()
102 if (ioctl(uffd, UFFDIO_REGISTER, &uffdio_register) == -1) { in register_region_with_uffd()
Drun_vmtests.sh129 run_test ./userfaultfd hugetlb_shared${mod} "$half_ufd_size_MB" 32 "$mnt"/uffd-test
130 rm -f "$mnt"/uffd-test
/Linux-v6.1/Documentation/admin-guide/mm/
Duserfaultfd.rst186 uffd. You can supply as many pages as you want with these IOCTLs.
202 ``ioctl(uffd, UFFDIO_WRITEPROTECT, struct *uffdio_writeprotect)``
207 Then, in the thread reading from uffd the struct will have
209 ``ioctl(uffd, UFFDIO_WRITEPROTECT, struct *uffdio_writeprotect)``
212 allows you to do the bookkeeping about the write in the uffd reading
Dpagemap.rst24 * Bit 57 pte is uffd-wp write-protected (since 5.13) (see