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Searched refs:uffd (Results 1 – 5 of 5) sorted by relevance

/Linux-v5.15/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-v5.15/tools/testing/selftests/kvm/
Ddemand_paging_test.c75 static int handle_uffd_page_request(int uffd_mode, int uffd, uint64_t addr) in handle_uffd_page_request() argument
92 r = ioctl(uffd, UFFDIO_COPY, &copy); in handle_uffd_page_request()
104 r = ioctl(uffd, UFFDIO_CONTINUE, &cont); in handle_uffd_page_request()
128 int uffd; member
136 int uffd = uffd_args->uffd; in uffd_handler_thread_fn() local
151 pollfd[0].fd = uffd; in uffd_handler_thread_fn()
185 r = read(uffd, &msg, sizeof(msg)); in uffd_handler_thread_fn()
204 r = handle_uffd_page_request(uffd_args->uffd_mode, uffd, addr); in uffd_handler_thread_fn()
225 int uffd; in setup_demand_paging() local
247 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); in setup_demand_paging()
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/Linux-v5.15/tools/testing/selftests/vm/
Duserfaultfd.c92 static int uffd = -1; variable
352 uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK | UFFD_USER_MODE_ONLY); in userfaultfd_open()
353 if (uffd < 0) in userfaultfd_open()
355 uffd_flags = fcntl(uffd, F_GETFD, NULL); in userfaultfd_open()
359 if (ioctl(uffd, UFFDIO_API, &uffdio_api)) in userfaultfd_open()
395 if (uffd != -1) { in uffd_test_ctx_clear()
396 if (close(uffd)) in uffd_test_ctx_clear()
398 uffd = -1; in uffd_test_ctx_clear()
642 int ret = read(uffd, msg, sizeof(*msg)); in uffd_read_msg()
667 wp_range(uffd, msg->arg.pagefault.address, page_size, false); in uffd_handle_page_fault()
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/Linux-v5.15/Documentation/admin-guide/mm/
Duserfaultfd.rst151 uffd. You can supply as many pages as you want with these IOCTLs.
167 ``ioctl(uffd, UFFDIO_WRITEPROTECT, struct *uffdio_writeprotect)``
172 Then, in the thread reading from uffd the struct will have
174 ``ioctl(uffd, UFFDIO_WRITEPROTECT, struct *uffdio_writeprotect)``
177 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