| Joerg Roedel | 2a681cf | 2020-08-06 23:22:55 -0700 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _LINUX_PGALLLC_TRACK_H |
| 3 | #define _LINUX_PGALLLC_TRACK_H |
| 4 | |
| 5 | #if defined(CONFIG_MMU) |
| 6 | static inline p4d_t *p4d_alloc_track(struct mm_struct *mm, pgd_t *pgd, |
| 7 | unsigned long address, |
| 8 | pgtbl_mod_mask *mod_mask) |
| 9 | { |
| 10 | if (unlikely(pgd_none(*pgd))) { |
| 11 | if (__p4d_alloc(mm, pgd, address)) |
| 12 | return NULL; |
| 13 | *mod_mask |= PGTBL_PGD_MODIFIED; |
| 14 | } |
| 15 | |
| 16 | return p4d_offset(pgd, address); |
| 17 | } |
| 18 | |
| 19 | static inline pud_t *pud_alloc_track(struct mm_struct *mm, p4d_t *p4d, |
| 20 | unsigned long address, |
| 21 | pgtbl_mod_mask *mod_mask) |
| 22 | { |
| 23 | if (unlikely(p4d_none(*p4d))) { |
| 24 | if (__pud_alloc(mm, p4d, address)) |
| 25 | return NULL; |
| 26 | *mod_mask |= PGTBL_P4D_MODIFIED; |
| 27 | } |
| 28 | |
| 29 | return pud_offset(p4d, address); |
| 30 | } |
| 31 | |
| 32 | static inline pmd_t *pmd_alloc_track(struct mm_struct *mm, pud_t *pud, |
| 33 | unsigned long address, |
| 34 | pgtbl_mod_mask *mod_mask) |
| 35 | { |
| 36 | if (unlikely(pud_none(*pud))) { |
| 37 | if (__pmd_alloc(mm, pud, address)) |
| 38 | return NULL; |
| 39 | *mod_mask |= PGTBL_PUD_MODIFIED; |
| 40 | } |
| 41 | |
| 42 | return pmd_offset(pud, address); |
| 43 | } |
| 44 | #endif /* CONFIG_MMU */ |
| 45 | |
| 46 | #define pte_alloc_kernel_track(pmd, address, mask) \ |
| 47 | ((unlikely(pmd_none(*(pmd))) && \ |
| 48 | (__pte_alloc_kernel(pmd) || ({*(mask)|=PGTBL_PMD_MODIFIED;0;})))?\ |
| 49 | NULL: pte_offset_kernel(pmd, address)) |
| 50 | |
| 51 | #endif /* _LINUX_PGALLLC_TRACK_H */ |