#define F_SEAL_WRITE 0x0008 /* prevent writes */
#endif
+#ifndef MFD_HUGETLB
+#define MFD_HUGETLB 0x0004U
+#endif
+
+#ifndef MAP_HUGE_SHIFT
+#define MAP_HUGE_SHIFT 26
+#endif
+
+#ifndef MAP_FIXED_NOREPLACE
+#define MAP_FIXED_NOREPLACE 0x100000
+#endif
+
+uword
+clib_mem_get_default_hugepage_size (void)
+{
+ unformat_input_t input;
+ static u32 size = 0;
+ int fd;
+
+ if (size)
+ goto done;
+
+ /*
+ * If the kernel doesn't support hugepages, /proc/meminfo won't
+ * say anything about it. Use the regular page size as a default.
+ */
+ size = clib_mem_get_page_size () / 1024;
+
+ if ((fd = open ("/proc/meminfo", 0)) == -1)
+ return 0;
+
+ unformat_init_clib_file (&input, fd);
+
+ while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (&input, "Hugepagesize:%_%u kB", &size))
+ ;
+ else
+ unformat_skip_line (&input);
+ }
+ unformat_free (&input);
+ close (fd);
+done:
+ return 1024ULL * size;
+}
+
+static clib_mem_page_sz_t
+legacy_get_log2_default_hugepage_size (void)
+{
+ clib_mem_page_sz_t log2_page_size = CLIB_MEM_PAGE_SZ_UNKNOWN;
+ FILE *fp;
+ char tmp[33] = { };
+
+ if ((fp = fopen ("/proc/meminfo", "r")) == NULL)
+ return CLIB_MEM_PAGE_SZ_UNKNOWN;
+
+ while (fscanf (fp, "%32s", tmp) > 0)
+ if (strncmp ("Hugepagesize:", tmp, 13) == 0)
+ {
+ u32 size;
+ if (fscanf (fp, "%u", &size) > 0)
+ log2_page_size = 10 + min_log2 (size);
+ break;
+ }
+
+ fclose (fp);
+ return log2_page_size;
+}
+
+void
+clib_mem_main_init ()
+{
+ clib_mem_main_t *mm = &clib_mem_main;
+ uword page_size;
+ void *va;
+ int fd;
+
+ if (mm->log2_page_sz != CLIB_MEM_PAGE_SZ_UNKNOWN)
+ return;
+
+ /* system page size */
+ page_size = sysconf (_SC_PAGESIZE);
+ mm->log2_page_sz = min_log2 (page_size);
+
+ /* default system hugeppage size */
+ if ((fd = memfd_create ("test", MFD_HUGETLB)) != -1)
+ {
+ mm->log2_default_hugepage_sz = clib_mem_get_fd_log2_page_size (fd);
+ close (fd);
+ }
+ else /* likely kernel older than 4.14 */
+ mm->log2_default_hugepage_sz = legacy_get_log2_default_hugepage_size ();
+
+ /* numa nodes */
+ va = mmap (0, page_size, PROT_READ | PROT_WRITE, MAP_PRIVATE |
+ MAP_ANONYMOUS, -1, 0);
+ if (va == MAP_FAILED)
+ return;
+
+ if (mlock (va, page_size))
+ goto done;
+
+ for (int i = 0; i < CLIB_MAX_NUMAS; i++)
+ {
+ int status;
+ if (move_pages (0, 1, &va, &i, &status, 0) == 0)
+ mm->numa_node_bitmap |= 1ULL << i;
+ }
+
+done:
+ munmap (va, page_size);
+}
+
u64
-clib_mem_vm_get_page_size (int fd)
+clib_mem_get_fd_page_size (int fd)
{
struct stat st = { 0 };
if (fstat (fd, &st) == -1)
return st.st_blksize;
}
-int
-clib_mem_vm_get_log2_page_size (int fd)
+clib_mem_page_sz_t
+clib_mem_get_fd_log2_page_size (int fd)
{
- return min_log2 (clib_mem_vm_get_page_size (fd));
+ uword page_size = clib_mem_get_fd_page_size (fd);
+ return page_size ? min_log2 (page_size) : CLIB_MEM_PAGE_SZ_UNKNOWN;
}
void
-clib_mem_vm_randomize_va (uword * requested_va, u32 log2_page_size)
+clib_mem_vm_randomize_va (uword * requested_va,
+ clib_mem_page_sz_t log2_page_size)
{
u8 bit_mask = 15;
(clib_cpu_time_now () & bit_mask) * (1ull << log2_page_size);
}
-#ifndef MFD_HUGETLB
-#define MFD_HUGETLB 0x0004U
-#endif
+clib_error_t *
+clib_mem_create_fd (char *name, int *fdp)
+{
+ int fd;
+
+ ASSERT (name);
+
+ if ((fd = memfd_create (name, MFD_ALLOW_SEALING)) == -1)
+ return clib_error_return_unix (0, "memfd_create");
+
+ if ((fcntl (fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
+ {
+ close (fd);
+ return clib_error_return_unix (0, "fcntl (F_ADD_SEALS)");
+ }
+
+ *fdp = fd;
+ return 0;
+}
clib_error_t *
clib_mem_create_hugetlb_fd (char *name, int *fdp)
}
else
{
- if ((fd = memfd_create (a->name, MFD_ALLOW_SEALING)) == -1)
- {
- err = clib_error_return_unix (0, "memfd_create");
- goto error;
- }
-
- if ((fcntl (fd, F_ADD_SEALS, F_SEAL_SHRINK)) == -1)
- {
- err = clib_error_return_unix (0, "fcntl (F_ADD_SEALS)");
- goto error;
- }
+ if ((err = clib_mem_create_fd (a->name, &fd)))
+ goto error;
}
- log2_page_size = clib_mem_vm_get_log2_page_size (fd);
+ log2_page_size = clib_mem_get_fd_log2_page_size (fd);
if (log2_page_size == 0)
{
err = clib_error_return_unix (0, "cannot determine page size");
a->n_pages = n_pages;
a->addr = addr;
a->fd = fd;
+ CLIB_MEM_UNPOISON (addr, a->size);
goto done;
error:
}
}
+uword
+clib_mem_vm_reserve (uword start, uword size, clib_mem_page_sz_t log2_page_sz)
+{
+ clib_mem_main_t *mm = &clib_mem_main;
+ uword pagesize = 1ULL << log2_page_sz;
+ uword sys_page_sz = 1ULL << mm->log2_page_sz;
+ uword n_bytes;
+ void *base = 0, *p;
+
+ size = round_pow2 (size, pagesize);
+
+ /* in adition of requested reservation, we also rserve one system page
+ * (typically 4K) adjacent to the start off reservation */
+
+ if (start)
+ {
+ /* start address is provided, so we just need to make sure we are not
+ * replacing existing map */
+ if (start & pow2_mask (log2_page_sz))
+ return ~0;
+
+ base = (void *) start - sys_page_sz;
+ base = mmap (base, size + sys_page_sz, PROT_NONE,
+ MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE, -1, 0);
+ return (base == MAP_FAILED) ? ~0 : start;
+ }
+
+ /* to make sure that we get reservation aligned to page_size we need to
+ * request one additional page as mmap will return us address which is
+ * aligned only to system page size */
+ base = mmap (0, size + pagesize, PROT_NONE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+
+ if (base == MAP_FAILED)
+ return ~0;
+
+ /* return additional space at the end of allocation */
+ p = base + size + pagesize;
+ n_bytes = (uword) p & pow2_mask (log2_page_sz);
+ if (n_bytes)
+ {
+ p -= n_bytes;
+ munmap (p, n_bytes);
+ }
+
+ /* return additional space at the start of allocation */
+ n_bytes = pagesize - sys_page_sz - n_bytes;
+ if (n_bytes)
+ {
+ munmap (base, n_bytes);
+ base += n_bytes;
+ }
+
+ return (uword) base + sys_page_sz;
+}
+
+clib_mem_vm_map_hdr_t *
+clib_mem_vm_get_next_map_hdr (clib_mem_vm_map_hdr_t * hdr)
+{
+ clib_mem_main_t *mm = &clib_mem_main;
+ uword sys_page_sz = 1 << mm->log2_page_sz;
+ clib_mem_vm_map_hdr_t *next;
+ if (hdr == 0)
+ {
+ hdr = mm->first_map;
+ if (hdr)
+ mprotect (hdr, sys_page_sz, PROT_READ);
+ return hdr;
+ }
+ next = hdr->next;
+ mprotect (hdr, sys_page_sz, PROT_NONE);
+ if (next)
+ mprotect (next, sys_page_sz, PROT_READ);
+ return next;
+}
+
+void *
+clib_mem_vm_map_internal (void *base, clib_mem_page_sz_t log2_page_sz,
+ uword size, int fd, uword offset, char *name)
+{
+ clib_mem_main_t *mm = &clib_mem_main;
+ clib_mem_vm_map_hdr_t *hdr;
+ uword sys_page_sz = 1 << mm->log2_page_sz;
+ int mmap_flags = MAP_FIXED, is_huge = 0;
+
+ if (fd != -1)
+ {
+ mmap_flags |= MAP_SHARED;
+ log2_page_sz = clib_mem_get_fd_log2_page_size (fd);
+ if (log2_page_sz > mm->log2_page_sz)
+ is_huge = 1;
+ }
+ else
+ {
+ mmap_flags |= MAP_PRIVATE | MAP_ANONYMOUS;
+
+ if (log2_page_sz == mm->log2_page_sz)
+ log2_page_sz = CLIB_MEM_PAGE_SZ_DEFAULT;
+
+ switch (log2_page_sz)
+ {
+ case CLIB_MEM_PAGE_SZ_UNKNOWN:
+ /* will fail later */
+ break;
+ case CLIB_MEM_PAGE_SZ_DEFAULT:
+ log2_page_sz = mm->log2_page_sz;
+ break;
+ case CLIB_MEM_PAGE_SZ_DEFAULT_HUGE:
+ mmap_flags |= MAP_HUGETLB;
+ log2_page_sz = mm->log2_default_hugepage_sz;
+ is_huge = 1;
+ break;
+ default:
+ mmap_flags |= MAP_HUGETLB;
+ mmap_flags |= log2_page_sz << MAP_HUGE_SHIFT;
+ is_huge = 1;
+ }
+ }
+
+ if (log2_page_sz == CLIB_MEM_PAGE_SZ_UNKNOWN)
+ return CLIB_MEM_VM_MAP_FAILED;
+
+ size = round_pow2 (size, 1 << log2_page_sz);
+
+ base = (void *) clib_mem_vm_reserve ((uword) base, size, log2_page_sz);
+
+ if (base == (void *) ~0)
+ return CLIB_MEM_VM_MAP_FAILED;
+
+ base = mmap (base, size, PROT_READ | PROT_WRITE, mmap_flags, fd, offset);
+
+ if (base == MAP_FAILED)
+ return CLIB_MEM_VM_MAP_FAILED;
+
+ if (is_huge && (mlock (base, size) != 0))
+ {
+ munmap (base, size);
+ return CLIB_MEM_VM_MAP_FAILED;
+ }
+
+ hdr = mmap (base - sys_page_sz, sys_page_sz, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
+
+ if (hdr != base - sys_page_sz)
+ {
+ munmap (base, size);
+ return CLIB_MEM_VM_MAP_FAILED;
+ }
+
+ if (mm->last_map)
+ {
+ mprotect (mm->last_map, sys_page_sz, PROT_READ | PROT_WRITE);
+ mm->last_map->next = hdr;
+ mprotect (mm->last_map, sys_page_sz, PROT_NONE);
+ }
+ else
+ mm->first_map = hdr;
+
+ hdr->next = 0;
+ hdr->prev = mm->last_map;
+ mm->last_map = hdr;
+
+ hdr->base_addr = (uword) base;
+ hdr->log2_page_sz = log2_page_sz;
+ hdr->num_pages = size >> log2_page_sz;
+ hdr->fd = fd;
+ snprintf (hdr->name, CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1, "%s", (char *) name);
+ hdr->name[CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1] = 0;
+ mprotect (hdr, sys_page_sz, PROT_NONE);
+
+ CLIB_MEM_UNPOISON (base, size);
+ return base;
+}
+
+int
+clib_mem_vm_unmap (void *base)
+{
+ clib_mem_main_t *mm = &clib_mem_main;
+ uword size, sys_page_sz = 1 << mm->log2_page_sz;
+ clib_mem_vm_map_hdr_t *hdr = base - sys_page_sz;;
+
+ if (mprotect (hdr, sys_page_sz, PROT_READ | PROT_WRITE) != 0)
+ return -1;
+
+ size = hdr->num_pages << hdr->log2_page_sz;
+ if (munmap ((void *) hdr->base_addr, size) != 0)
+ return -1;
+
+ if (hdr->next)
+ {
+ mprotect (hdr->next, sys_page_sz, PROT_READ | PROT_WRITE);
+ hdr->next->prev = hdr->prev;
+ mprotect (hdr->next, sys_page_sz, PROT_NONE);
+ }
+ else
+ mm->last_map = hdr->prev;
+
+ if (hdr->prev)
+ {
+ mprotect (hdr->prev, sys_page_sz, PROT_READ | PROT_WRITE);
+ hdr->prev->next = hdr->next;
+ mprotect (hdr->prev, sys_page_sz, PROT_NONE);
+ }
+ else
+ mm->first_map = hdr->next;
+
+ if (munmap (hdr, sys_page_sz) != 0)
+ return -1;
+
+ return 0;
+}
+
+void
+clib_mem_get_page_stats (void *start, clib_mem_page_sz_t log2_page_size,
+ uword n_pages, clib_mem_page_stats_t * stats)
+{
+ int i, *status = 0;
+ void **ptr = 0;
+
+ log2_page_size = clib_mem_log2_page_size_validate (log2_page_size);
+
+ vec_validate (status, n_pages - 1);
+ vec_validate (ptr, n_pages - 1);
+
+ for (i = 0; i < n_pages; i++)
+ ptr[i] = start + (i << log2_page_size);
+
+ clib_memset (stats, 0, sizeof (clib_mem_page_stats_t));
+
+ if (move_pages (0, n_pages, ptr, 0, status, 0) != 0)
+ {
+ stats->unknown = n_pages;
+ return;
+ }
+
+ for (i = 0; i < n_pages; i++)
+ {
+ if (status[i] >= 0 && status[i] < CLIB_MAX_NUMAS)
+ {
+ stats->mapped++;
+ stats->per_numa[status[i]]++;
+ }
+ else if (status[i] == -EFAULT)
+ stats->not_mapped++;
+ else
+ stats->unknown++;
+ }
+}
+
+
u64 *
-clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages)
+clib_mem_vm_get_paddr (void *mem, clib_mem_page_sz_t log2_page_size,
+ int n_pages)
{
int pagesize = sysconf (_SC_PAGESIZE);
int fd;
int i;
u64 *r = 0;
+ log2_page_size = clib_mem_log2_page_size_validate (log2_page_size);
+
if ((fd = open ((char *) "/proc/self/pagemap", O_RDONLY)) == -1)
return 0;
clib_error_t *
clib_mem_vm_ext_map (clib_mem_vm_map_t * a)
{
+ long unsigned int old_mask[16] = { 0 };
int mmap_flags = MAP_SHARED;
+ clib_error_t *err = 0;
+ int old_mpol = -1;
void *addr;
+ int rv;
+
+ if (a->numa_node)
+ {
+ rv = get_mempolicy (&old_mpol, old_mask, sizeof (old_mask) * 8 + 1, 0,
+ 0);
+
+ if (rv == -1)
+ {
+ err = clib_error_return_unix (0, "get_mempolicy");
+ goto done;
+ }
+ }
if (a->requested_va)
mmap_flags |= MAP_FIXED;
+ if (old_mpol != -1)
+ {
+ long unsigned int mask[16] = { 0 };
+ mask[0] = 1 << a->numa_node;
+ rv = set_mempolicy (MPOL_BIND, mask, sizeof (mask) * 8 + 1);
+ if (rv == -1)
+ {
+ err = clib_error_return_unix (0, "set_mempolicy");
+ goto done;
+ }
+ }
+
addr = (void *) mmap (uword_to_pointer (a->requested_va, void *), a->size,
PROT_READ | PROT_WRITE, mmap_flags, a->fd, 0);
if (addr == MAP_FAILED)
return clib_error_return_unix (0, "mmap");
+ /* re-apply old numa memory policy */
+ if (old_mpol != -1 &&
+ set_mempolicy (old_mpol, old_mask, sizeof (old_mask) * 8 + 1) == -1)
+ {
+ err = clib_error_return_unix (0, "set_mempolicy");
+ goto done;
+ }
+
a->addr = addr;
- return 0;
+ CLIB_MEM_UNPOISON (addr, a->size);
+
+done:
+ return err;
}
/*
Code Review / vpp.git / blobdiff