diff options
Diffstat (limited to 'arch/riscv/mm/hugetlbpage.c')
| -rw-r--r-- | arch/riscv/mm/hugetlbpage.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/riscv/mm/hugetlbpage.c b/arch/riscv/mm/hugetlbpage.c new file mode 100644 index 000000000000..0d4747e9d5b5 --- /dev/null +++ b/arch/riscv/mm/hugetlbpage.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/hugetlb.h> +#include <linux/err.h> + +int pud_huge(pud_t pud) +{ + return pud_present(pud) && + (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); +} + +int pmd_huge(pmd_t pmd) +{ + return pmd_present(pmd) && + (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); +} + +static __init int setup_hugepagesz(char *opt) +{ + unsigned long ps = memparse(opt, &opt); + + if (ps == HPAGE_SIZE) { + hugetlb_add_hstate(HPAGE_SHIFT - PAGE_SHIFT); + } else if (IS_ENABLED(CONFIG_64BIT) && ps == PUD_SIZE) { + hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT); + } else { + hugetlb_bad_size(); + pr_err("hugepagesz: Unsupported page size %lu M\n", ps >> 20); + return 0; + } + + return 1; +} +__setup("hugepagesz=", setup_hugepagesz); + +#ifdef CONFIG_CONTIG_ALLOC +static __init int gigantic_pages_init(void) +{ + /* With CONTIG_ALLOC, we can allocate gigantic pages at runtime */ + if (IS_ENABLED(CONFIG_64BIT) && !size_to_hstate(1UL << PUD_SHIFT)) + hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT); + return 0; +} +arch_initcall(gigantic_pages_init); +#endif |