qemu/util/mmap-alloc.c

10  * later.  See the COPYING file in the top-level directory.
21 #include "qemu/mmap-alloc.h"
22 #include "qemu/host-utils.h"
24 #include "qemu/error-report.h"
66     if (fd != -1) {  in qemu_fd_getpagesize()
90     gchar *content = NULL;  in map_noreserve_effective()  local
109      * implicitly active -- no reservation; this includes shmem. The only  in map_noreserve_effective()
119      * memory overcommit is set to "never". Sparse memory regions aren't really  in map_noreserve_effective()
125     if (g_file_get_contents(OVERCOMMIT_MEMORY_PATH, &content, NULL, NULL) &&  in map_noreserve_effective()
126         !qemu_strtoui(content, &endptr, 0, &tmp) &&  in map_noreserve_effective()
159      * page size. Since we will be re-allocating part of this segment  in mmap_reserve()
161      * this end we mmap the supplied fd.  In this case, set MAP_NORESERVE to  in mmap_reserve()
166     if (fd == -1 || qemu_fd_getpagesize(fd) == qemu_real_host_page_size()) {  in mmap_reserve()
167         fd = -1;  in mmap_reserve()
173     fd = -1;  in mmap_reserve()
200     flags |= fd == -1 ? MAP_ANONYMOUS : 0;  in mmap_activate()
213             int len = readlink(proc_link, file_name, PATH_MAX - 1);  in mmap_activate()
272     offset = QEMU_ALIGN_UP((uintptr_t)guardptr, align) - (uintptr_t)guardptr;  in qemu_ram_mmap()
289     total -= offset;  in qemu_ram_mmap()
291         munmap(ptr + size + guard_pagesize, total - size - guard_pagesize);  in qemu_ram_mmap()