^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _ASM_X86_PGALLOC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _ASM_X86_PGALLOC_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/threads.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/mm.h> /* for struct page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define __HAVE_ARCH_PTE_ALLOC_ONE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define __HAVE_ARCH_PGD_FREE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm-generic/pgalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #ifdef CONFIG_PARAVIRT_XXL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/paravirt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) unsigned long start, unsigned long count) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static inline void paravirt_release_pte(unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static inline void paravirt_release_pmd(unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static inline void paravirt_release_pud(unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static inline void paravirt_release_p4d(unsigned long pfn) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Flags to use when allocating a user page table page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) extern gfp_t __userpte_alloc_gfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #ifdef CONFIG_PAGE_TABLE_ISOLATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * Instead of one PGD, we acquire two PGDs. Being order-1, it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * both 8k in size and 8k-aligned. That lets us just flip bit 12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * in a pointer to swap between the two 4k halves.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define PGD_ALLOCATION_ORDER 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define PGD_ALLOCATION_ORDER 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * Allocate and free page tables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) extern pgd_t *pgd_alloc(struct mm_struct *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) extern pgtable_t pte_alloc_one(struct mm_struct *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) extern void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) ___pte_free_tlb(tlb, pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static inline void pmd_populate_kernel(struct mm_struct *mm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) pmd_t *pmd, pte_t *pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static inline void pmd_populate_kernel_safe(struct mm_struct *mm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) pmd_t *pmd, pte_t *pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) set_pmd_safe(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct page *pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unsigned long pfn = page_to_pfn(pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) paravirt_alloc_pte(mm, pfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define pmd_pgtable(pmd) pmd_page(pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #if CONFIG_PGTABLE_LEVELS > 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ___pmd_free_tlb(tlb, pmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #ifdef CONFIG_X86_PAE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #else /* !CONFIG_X86_PAE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static inline void pud_populate_safe(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) set_pud_safe(pud, __pud(_PAGE_TABLE | __pa(pmd)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #endif /* CONFIG_X86_PAE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #if CONFIG_PGTABLE_LEVELS > 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) set_p4d(p4d, __p4d(_PAGE_TABLE | __pa(pud)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) set_p4d_safe(p4d, __p4d(_PAGE_TABLE | __pa(pud)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ___pud_free_tlb(tlb, pud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #if CONFIG_PGTABLE_LEVELS > 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (!pgtable_l5_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static inline void pgd_populate_safe(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (!pgtable_l5_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) set_pgd_safe(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) gfp_t gfp = GFP_KERNEL_ACCOUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (mm == &init_mm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) gfp &= ~__GFP_ACCOUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return (p4d_t *)get_zeroed_page(gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (!pgtable_l5_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) BUG_ON((unsigned long)p4d & (PAGE_SIZE-1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) free_page((unsigned long)p4d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) extern void ___p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (pgtable_l5_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) ___p4d_free_tlb(tlb, p4d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) #endif /* CONFIG_PGTABLE_LEVELS > 4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) #endif /* CONFIG_PGTABLE_LEVELS > 3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #endif /* CONFIG_PGTABLE_LEVELS > 2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) #endif /* _ASM_X86_PGALLOC_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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