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/*
* Copyright (C) 2016 - ARM Ltd
*
* stage2 page table helpers
*
* 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 __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) pud_free(NULL, pud)
#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) pmd_free(NULL, 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
static inline bool kvm_stage2_has_pmd(struct kvm *kvm)
{
return true;
}
#endif /* __ARM_S2_PGTABLE_H_ */
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