Cregit: Linux 6.10: pgtable-4k.h

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Aneesh Kumar K.V	77	78.57%	7	63.64%
David Gibson	14	14.29%	1	9.09%
Anton Blanchard	6	6.12%	2	18.18%
Greg Kroah-Hartman	1	1.02%	1	9.09%
Total	98		11

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
#define _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
/*
 * hash 4k can't share hugetlb and also doesn't support THP
 */
#ifndef __ASSEMBLY__
#ifdef CONFIG_HUGETLB_PAGE
/*
 * With radix , we have hugepage ptes in the pud and pmd entries. We don't
 * need to setup hugepage directory for them. Our pte and page directory format
 * enable us to have this enabled.
 */
static inline int hugepd_ok(hugepd_t hpd)
{
	if (radix_enabled())
		return 0;
	return hash__hugepd_ok(hpd);
}
#define is_hugepd(hpd)		(hugepd_ok(hpd))

/*
 * 16M and 16G huge page directory tables are allocated from slab cache
 *
 */
#define H_16M_CACHE_INDEX (PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE - 24)
#define H_16G_CACHE_INDEX                                                      \
	(PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + H_PUD_INDEX_SIZE - 34)

static inline int get_hugepd_cache_index(int index)
{
	switch (index) {
	case H_16M_CACHE_INDEX:
		return HTLB_16M_INDEX;
	case H_16G_CACHE_INDEX:
		return HTLB_16G_INDEX;
	default:
		BUG();
	}
	/* should not reach */
}

#endif /* CONFIG_HUGETLB_PAGE */

#endif /* __ASSEMBLY__ */

#endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H */