1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2020 Dmitry Kozlyuk
9 #include <rte_eal_paging.h>
10 #include <rte_errno.h>
13 #include "eal_private.h"
15 #ifdef RTE_EXEC_ENV_LINUX
16 #define EAL_DONTDUMP MADV_DONTDUMP
17 #define EAL_DODUMP MADV_DODUMP
18 #elif defined RTE_EXEC_ENV_FREEBSD
19 #define EAL_DONTDUMP MADV_NOCORE
20 #define EAL_DODUMP MADV_CORE
22 #error "madvise doesn't support this OS"
26 mem_map(void *requested_addr, size_t size, int prot, int flags,
27 int fd, size_t offset)
29 void *virt = mmap(requested_addr, size, prot, flags, fd, offset);
30 if (virt == MAP_FAILED) {
32 "Cannot mmap(%p, 0x%zx, 0x%x, 0x%x, %d, 0x%zx): %s\n",
33 requested_addr, size, prot, flags, fd, offset,
42 mem_unmap(void *virt, size_t size)
44 int ret = munmap(virt, size);
46 RTE_LOG(DEBUG, EAL, "Cannot munmap(%p, 0x%zx): %s\n",
47 virt, size, strerror(errno));
54 eal_mem_reserve(void *requested_addr, size_t size, int flags)
56 int sys_flags = MAP_PRIVATE | MAP_ANONYMOUS;
58 if (flags & EAL_RESERVE_HUGEPAGES) {
60 sys_flags |= MAP_HUGETLB;
67 if (flags & EAL_RESERVE_FORCE_ADDRESS)
68 sys_flags |= MAP_FIXED;
70 return mem_map(requested_addr, size, PROT_NONE, sys_flags, -1, 0);
74 eal_mem_free(void *virt, size_t size)
76 mem_unmap(virt, size);
80 eal_mem_set_dump(void *virt, size_t size, bool dump)
82 int flags = dump ? EAL_DODUMP : EAL_DONTDUMP;
83 int ret = madvise(virt, size, flags);
85 RTE_LOG(DEBUG, EAL, "madvise(%p, %#zx, %d) failed: %s\n",
86 virt, size, flags, strerror(rte_errno));
93 mem_rte_to_sys_prot(int prot)
95 int sys_prot = PROT_NONE;
97 if (prot & RTE_PROT_READ)
98 sys_prot |= PROT_READ;
99 if (prot & RTE_PROT_WRITE)
100 sys_prot |= PROT_WRITE;
101 if (prot & RTE_PROT_EXECUTE)
102 sys_prot |= PROT_EXEC;
108 rte_mem_map(void *requested_addr, size_t size, int prot, int flags,
109 int fd, size_t offset)
114 sys_prot = mem_rte_to_sys_prot(prot);
116 if (flags & RTE_MAP_SHARED)
117 sys_flags |= MAP_SHARED;
118 if (flags & RTE_MAP_ANONYMOUS)
119 sys_flags |= MAP_ANONYMOUS;
120 if (flags & RTE_MAP_PRIVATE)
121 sys_flags |= MAP_PRIVATE;
122 if (flags & RTE_MAP_FORCE_ADDRESS)
123 sys_flags |= MAP_FIXED;
125 return mem_map(requested_addr, size, sys_prot, sys_flags, fd, offset);
129 rte_mem_unmap(void *virt, size_t size)
131 return mem_unmap(virt, size);
135 rte_mem_page_size(void)
137 static size_t page_size;
140 page_size = sysconf(_SC_PAGESIZE);
146 rte_mem_lock(const void *virt, size_t size)
148 int ret = mlock(virt, size);