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// SPDX-License-Identifier: GPL-2.0
#include <linux/hugetlb.h>
#include <linux/err.h>
int pud_huge(pud_t pud)
{
return pud_leaf(pud);
}
int pmd_huge(pmd_t pmd)
{
return pmd_leaf(pmd);
}
bool __init arch_hugetlb_valid_size(unsigned long size)
{
if (size == HPAGE_SIZE)
return true;
else if (IS_ENABLED(CONFIG_64BIT) && size == PUD_SIZE)
return true;
else
return false;
}
static __init int setup_hugepagesz(char *opt)
{
unsigned long ps = memparse(opt, &opt);
if (arch_hugetlb_valid_size(ps)) {
hugetlb_add_hstate(ilog2(ps) - PAGE_SHIFT);
return 1;
}
hugetlb_bad_size();
pr_err("hugepagesz: Unsupported page size %lu M\n", ps >> 20);
return 0;
}
__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
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