#define F_SEAL_WRITE 0x0008 /* prevent writes */
#endif
+
+uword
+clib_mem_get_page_size (void)
+{
+ return getpagesize ();
+}
+
+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;
+}
+
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)
}
int
-clib_mem_vm_get_log2_page_size (int fd)
+clib_mem_get_fd_log2_page_size (int fd)
{
- return min_log2 (clib_mem_vm_get_page_size (fd));
+ return min_log2 (clib_mem_get_fd_page_size (fd));
}
void
#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, u32 log2_page_sz)
+{
+ uword off, pagesize = 1ULL << log2_page_sz;
+ int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS;
+ u8 *p;
+
+ if (start)
+ mmap_flags |= MAP_FIXED;
+
+ size = round_pow2 (size, pagesize);
+
+ p = uword_to_pointer (start, void *);
+ p = mmap (p, size + pagesize, PROT_NONE, mmap_flags, -1, 0);
+
+ if (p == MAP_FAILED)
+ return ~0;
+
+ off = round_pow2 ((uword) p, pagesize) - (uword) p;
+
+ /* trim start and end of reservation to be page aligned */
+ if (off)
+ {
+ munmap (p, off);
+ p += off;
+ }
+
+ munmap (p + size, pagesize - off);
+
+ return (uword) p;
+}
+
u64 *
clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages)
{
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;
}
/*