LXR linux/arch/arm/include/asm/stage2

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (C) 2016 - ARM Ltd
   4 *
   5 * stage2 page table helpers
   6 */
   7
   8#ifndef __ARM_S2_PGTABLE_H_
   9#define __ARM_S2_PGTABLE_H_
  10
  11/*
  12 * kvm_mmu_cache_min_pages() is the number of pages required
  13 * to install a stage-2 translation. We pre-allocate the entry
  14 * level table at VM creation. Since we have a 3 level page-table,
  15 * we need only two pages to add a new mapping.
  16 */
  17#define kvm_mmu_cache_min_pages(kvm)    2
  18
  19#define stage2_pgd_none(kvm, pgd)               pgd_none(pgd)
  20#define stage2_pgd_clear(kvm, pgd)              pgd_clear(pgd)
  21#define stage2_pgd_present(kvm, pgd)            pgd_present(pgd)
  22#define stage2_pgd_populate(kvm, pgd, pud)      pgd_populate(NULL, pgd, pud)
  23#define stage2_pud_offset(kvm, pgd, address)    pud_offset(pgd, address)
  24#define stage2_pud_free(kvm, pud)               do { } while (0)
  25
  26#define stage2_pud_none(kvm, pud)               pud_none(pud)
  27#define stage2_pud_clear(kvm, pud)              pud_clear(pud)
  28#define stage2_pud_present(kvm, pud)            pud_present(pud)
  29#define stage2_pud_populate(kvm, pud, pmd)      pud_populate(NULL, pud, pmd)
  30#define stage2_pmd_offset(kvm, pud, address)    pmd_offset(pud, address)
  31#define stage2_pmd_free(kvm, pmd)               free_page((unsigned long)pmd)
  32
  33#define stage2_pud_huge(kvm, pud)               pud_huge(pud)
  34
  35/* Open coded p*d_addr_end that can deal with 64bit addresses */
  36static inline phys_addr_t
  37stage2_pgd_addr_end(struct kvm *kvm, phys_addr_t addr, phys_addr_t end)
  38{
  39        phys_addr_t boundary = (addr + PGDIR_SIZE) & PGDIR_MASK;
  40
  41        return (boundary - 1 < end - 1) ? boundary : end;
  42}
  43
  44#define stage2_pud_addr_end(kvm, addr, end)     (end)
  45
  46static inline phys_addr_t
  47stage2_pmd_addr_end(struct kvm *kvm, phys_addr_t addr, phys_addr_t end)
  48{
  49        phys_addr_t boundary = (addr + PMD_SIZE) & PMD_MASK;
  50
  51        return (boundary - 1 < end - 1) ? boundary : end;
  52}
  53
  54#define stage2_pgd_index(kvm, addr)             pgd_index(addr)
  55
  56#define stage2_pte_table_empty(kvm, ptep)       kvm_page_empty(ptep)
  57#define stage2_pmd_table_empty(kvm, pmdp)       kvm_page_empty(pmdp)
  58#define stage2_pud_table_empty(kvm, pudp)       false
  59
  60static inline bool kvm_stage2_has_pud(struct kvm *kvm)
  61{
  62        return false;
  63}
  64
  65#define S2_PMD_MASK                             PMD_MASK
  66#define S2_PMD_SIZE                             PMD_SIZE
  67#define S2_PUD_MASK                             PUD_MASK
  68#define S2_PUD_SIZE                             PUD_SIZE
  69
  70static inline bool kvm_stage2_has_pmd(struct kvm *kvm)
  71{
  72        return true;
  73}
  74
  75#endif  /* __ARM_S2_PGTABLE_H_ */
  76