arch/riscv/mm/hugetlbpage.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/hugetlb.h>
   3 #include <linux/err.h>
   4
   5 int pud_huge(pud_t pud)
   6 {
   7         return pud_leaf(pud);
   8 }
   9
  10 int pmd_huge(pmd_t pmd)
  11 {
  12         return pmd_leaf(pmd);
  13 }
  14
  15 static __init int setup_hugepagesz(char *opt)
  16 {
  17         unsigned long ps = memparse(opt, &opt);
  18
  19         if (ps == HPAGE_SIZE) {
  20                 hugetlb_add_hstate(HPAGE_SHIFT - PAGE_SHIFT);
  21         } else if (IS_ENABLED(CONFIG_64BIT) && ps == PUD_SIZE) {
  22                 hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
  23         } else {
  24                 hugetlb_bad_size();
  25                 pr_err("hugepagesz: Unsupported page size %lu M\n", ps >> 20);
  26                 return 0;
  27         }
  28
  29         return 1;
  30 }
  31 __setup("hugepagesz=", setup_hugepagesz);
  32
  33 #ifdef CONFIG_CONTIG_ALLOC
  34 static __init int gigantic_pages_init(void)
  35 {
  36         /* With CONTIG_ALLOC, we can allocate gigantic pages at runtime */
  37         if (IS_ENABLED(CONFIG_64BIT) && !size_to_hstate(1UL << PUD_SHIFT))
  38                 hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
  39         return 0;
  40 }
  41 arch_initcall(gigantic_pages_init);
  42 #endif