| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2016 - ARM Ltd |
| * |
| * stage2 page table helpers |
| */ |
| |
| #ifndef __ARM_S2_PGTABLE_H_ |
| #define __ARM_S2_PGTABLE_H_ |
| |
| /* |
| * kvm_mmu_cache_min_pages() is the number of pages required |
| * to install a stage-2 translation. We pre-allocate the entry |
| * level table at VM creation. Since we have a 3 level page-table, |
| * we need only two pages to add a new mapping. |
| */ |
| #define kvm_mmu_cache_min_pages(kvm) 2 |
| |
| #define stage2_pgd_none(kvm, pgd) pgd_none(pgd) |
| #define stage2_pgd_clear(kvm, pgd) pgd_clear(pgd) |
| #define stage2_pgd_present(kvm, pgd) pgd_present(pgd) |
| #define stage2_pgd_populate(kvm, pgd, pud) pgd_populate(NULL, pgd, pud) |
| #define stage2_pud_offset(kvm, pgd, address) pud_offset(pgd, address) |
| #define stage2_pud_free(kvm, pud) do { } while (0) |
| |
| #define stage2_pud_none(kvm, pud) pud_none(pud) |
| #define stage2_pud_clear(kvm, pud) pud_clear(pud) |
| #define stage2_pud_present(kvm, pud) pud_present(pud) |
| #define stage2_pud_populate(kvm, pud, pmd) pud_populate(NULL, pud, pmd) |
| #define stage2_pmd_offset(kvm, pud, address) pmd_offset(pud, address) |
| #define stage2_pmd_free(kvm, pmd) free_page((unsigned long)pmd) |
| |
| #define stage2_pud_huge(kvm, pud) pud_huge(pud) |
| |
| /* Open coded p*d_addr_end that can deal with 64bit addresses */ |
| static inline phys_addr_t |
| stage2_pgd_addr_end(struct kvm *kvm, phys_addr_t addr, phys_addr_t end) |
| { |
| phys_addr_t boundary = (addr + PGDIR_SIZE) & PGDIR_MASK; |
| |
| return (boundary - 1 < end - 1) ? boundary : end; |
| } |
| |
| #define stage2_pud_addr_end(kvm, addr, end) (end) |
| |
| static inline phys_addr_t |
| stage2_pmd_addr_end(struct kvm *kvm, phys_addr_t addr, phys_addr_t end) |
| { |
| phys_addr_t boundary = (addr + PMD_SIZE) & PMD_MASK; |
| |
| return (boundary - 1 < end - 1) ? boundary : end; |
| } |
| |
| #define stage2_pgd_index(kvm, addr) pgd_index(addr) |
| |
| #define stage2_pte_table_empty(kvm, ptep) kvm_page_empty(ptep) |
| #define stage2_pmd_table_empty(kvm, pmdp) kvm_page_empty(pmdp) |
| #define stage2_pud_table_empty(kvm, pudp) false |
| |
| static inline bool kvm_stage2_has_pud(struct kvm *kvm) |
| { |
| return false; |
| } |
| |
| #define S2_PMD_MASK PMD_MASK |
| #define S2_PMD_SIZE PMD_SIZE |
| #define S2_PUD_MASK PUD_MASK |
| #define S2_PUD_SIZE PUD_SIZE |
| |
| static inline bool kvm_stage2_has_pmd(struct kvm *kvm) |
| { |
| return true; |
| } |
| |
| #endif /* __ARM_S2_PGTABLE_H_ */ |