arch/arm64/include/asm/trans_pgd.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 /*
   4  * Copyright (c) 2021, Microsoft Corporation.
   5  * Pasha Tatashin <pasha.tatashin@soleen.com>
   6  */
   7
   8 #ifndef _ASM_TRANS_TABLE_H
   9 #define _ASM_TRANS_TABLE_H
  10
  11 #include <linux/bits.h>
  12 #include <linux/types.h>
  13 #include <asm/pgtable-types.h>
  14
  15 /*
  16  * trans_alloc_page
  17  *      - Allocator that should return exactly one zeroed page, if this
  18  *        allocator fails, trans_pgd_create_copy() and trans_pgd_idmap_page()
  19  *        return -ENOMEM error.
  20  *
  21  * trans_alloc_arg
  22  *      - Passed to trans_alloc_page as an argument
  23  */
  24
  25 struct trans_pgd_info {
  26         void * (*trans_alloc_page)(void *arg);
  27         void *trans_alloc_arg;
  28 };
  29
  30 int trans_pgd_create_copy(struct trans_pgd_info *info, pgd_t **trans_pgd,
  31                           unsigned long start, unsigned long end);
  32
  33 int trans_pgd_idmap_page(struct trans_pgd_info *info, phys_addr_t *trans_ttbr0,
  34                          unsigned long *t0sz, void *page);
  35
  36 int trans_pgd_copy_el2_vectors(struct trans_pgd_info *info,
  37                                phys_addr_t *el2_vectors);
  38
  39 extern char trans_pgd_stub_vectors[];
  40
  41 #endif /* _ASM_TRANS_TABLE_H */