diff options
Diffstat (limited to 'arch/arm64/include/asm/pgalloc.h')
| -rw-r--r-- | arch/arm64/include/asm/pgalloc.h | 123 |
1 files changed, 46 insertions, 77 deletions
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h index d25f4f137c2a..1b4509d3382c 100644 --- a/arch/arm64/include/asm/pgalloc.h +++ b/arch/arm64/include/asm/pgalloc.h @@ -1,20 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Based on arch/arm/include/asm/pgalloc.h * * Copyright (C) 2000-2001 Russell King * Copyright (C) 2012 ARM Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_PGALLOC_H #define __ASM_PGALLOC_H @@ -24,35 +13,28 @@ #include <asm/cacheflush.h> #include <asm/tlbflush.h> -#define check_pgt_cache() do { } while (0) +#define __HAVE_ARCH_PGD_FREE +#define __HAVE_ARCH_PUD_FREE +#include <asm-generic/pgalloc.h> -#define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) #if CONFIG_PGTABLE_LEVELS > 2 -static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) +static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) { - return (pmd_t *)__get_free_page(PGALLOC_GFP); + set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot)); } -static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) +static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp) { - BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); - free_page((unsigned long)pmd); -} + pudval_t pudval = PUD_TYPE_TABLE | PUD_TABLE_AF; -static inline void __pud_populate(pud_t *pud, phys_addr_t pmd, pudval_t prot) -{ - set_pud(pud, __pud(pmd | prot)); -} - -static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) -{ - __pud_populate(pud, __pa(pmd), PMD_TYPE_TABLE); + pudval |= (mm == &init_mm) ? PUD_TABLE_UXN : PUD_TABLE_PXN; + __pud_populate(pudp, __pa(pmdp), pudval); } #else -static inline void __pud_populate(pud_t *pud, phys_addr_t pmd, pudval_t prot) +static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) { BUILD_BUG(); } @@ -60,76 +42,63 @@ static inline void __pud_populate(pud_t *pud, phys_addr_t pmd, pudval_t prot) #if CONFIG_PGTABLE_LEVELS > 3 -static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) +static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) { - return (pud_t *)__get_free_page(PGALLOC_GFP); + if (pgtable_l4_enabled()) + set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot)); } -static inline void pud_free(struct mm_struct *mm, pud_t *pud) +static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp) { - BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); - free_page((unsigned long)pud); -} + p4dval_t p4dval = P4D_TYPE_TABLE | P4D_TABLE_AF; -static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pud, pgdval_t prot) -{ - set_pgd(pgdp, __pgd(pud | prot)); + p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN; + __p4d_populate(p4dp, __pa(pudp), p4dval); } -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) +static inline void pud_free(struct mm_struct *mm, pud_t *pud) { - __pgd_populate(pgd, __pa(pud), PUD_TYPE_TABLE); + if (!pgtable_l4_enabled()) + return; + __pud_free(mm, pud); } #else -static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t pud, pgdval_t prot) +static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) { BUILD_BUG(); } #endif /* CONFIG_PGTABLE_LEVELS > 3 */ -extern pgd_t *pgd_alloc(struct mm_struct *mm); -extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); +#if CONFIG_PGTABLE_LEVELS > 4 -static inline pte_t * -pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) +static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot) { - return (pte_t *)__get_free_page(PGALLOC_GFP); + if (pgtable_l5_enabled()) + set_pgd(pgdp, __pgd(__phys_to_pgd_val(p4dp) | prot)); } -static inline pgtable_t -pte_alloc_one(struct mm_struct *mm, unsigned long addr) +static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgdp, p4d_t *p4dp) { - struct page *pte; - - pte = alloc_pages(PGALLOC_GFP, 0); - if (!pte) - return NULL; - if (!pgtable_page_ctor(pte)) { - __free_page(pte); - return NULL; - } - return pte; -} + pgdval_t pgdval = PGD_TYPE_TABLE | PGD_TABLE_AF; -/* - * Free a PTE table. - */ -static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) -{ - if (pte) - free_page((unsigned long)pte); + pgdval |= (mm == &init_mm) ? PGD_TABLE_UXN : PGD_TABLE_PXN; + __pgd_populate(pgdp, __pa(p4dp), pgdval); } -static inline void pte_free(struct mm_struct *mm, pgtable_t pte) +#else +static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot) { - pgtable_page_dtor(pte); - __free_page(pte); + BUILD_BUG(); } +#endif /* CONFIG_PGTABLE_LEVELS > 4 */ + +extern pgd_t *pgd_alloc(struct mm_struct *mm); +extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp); -static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t pte, +static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep, pmdval_t prot) { - set_pmd(pmdp, __pmd(pte | prot)); + set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot)); } /* @@ -139,17 +108,17 @@ static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t pte, static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) { - /* - * The pmd must be loaded with the physical address of the PTE table - */ - __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE); + VM_BUG_ON(mm && mm != &init_mm); + __pmd_populate(pmdp, __pa(ptep), + PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_UXN); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) { - __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE); + VM_BUG_ON(mm == &init_mm); + __pmd_populate(pmdp, page_to_phys(ptep), + PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_PXN); } -#define pmd_pgtable(pmd) pmd_page(pmd) #endif |