45 строки
1.0 KiB
C
45 строки
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/hugetlb.h>
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#include <linux/err.h>
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int pud_huge(pud_t pud)
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{
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return pud_present(pud) &&
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(pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
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}
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int pmd_huge(pmd_t pmd)
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{
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return pmd_present(pmd) &&
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(pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
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}
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static __init int setup_hugepagesz(char *opt)
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{
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unsigned long ps = memparse(opt, &opt);
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if (ps == HPAGE_SIZE) {
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hugetlb_add_hstate(HPAGE_SHIFT - PAGE_SHIFT);
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} else if (IS_ENABLED(CONFIG_64BIT) && ps == PUD_SIZE) {
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hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
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} else {
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hugetlb_bad_size();
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pr_err("hugepagesz: Unsupported page size %lu M\n", ps >> 20);
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return 0;
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}
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return 1;
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}
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__setup("hugepagesz=", setup_hugepagesz);
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#ifdef CONFIG_CONTIG_ALLOC
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static __init int gigantic_pages_init(void)
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{
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/* With CONTIG_ALLOC, we can allocate gigantic pages at runtime */
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if (IS_ENABLED(CONFIG_64BIT) && !size_to_hstate(1UL << PUD_SHIFT))
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hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
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return 0;
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}
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arch_initcall(gigantic_pages_init);
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#endif
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