LXR linux/arch/riscv/mm/hugetlbpage.c

   1// SPDX-License-Identifier: GPL-2.0
   2#include <linux/hugetlb.h>
   3#include <linux/err.h>
   4
   5int pud_huge(pud_t pud)
   6{
   7        return pud_leaf(pud);
   8}
   9
  10int pmd_huge(pmd_t pmd)
  11{
  12        return pmd_leaf(pmd);
  13}
  14
  15static __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
  34static __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}
  41arch_initcall(gigantic_pages_init);
  42#endif
  43