arch/x86/xen/efi.c

   1 /*
   2  * Copyright (c) 2014 Oracle Co., Daniel Kiper
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <linux/bitops.h>
  19 #include <linux/efi.h>
  20 #include <linux/init.h>
  21 #include <linux/string.h>
  22
  23 #include <xen/xen-ops.h>
  24
  25 #include <asm/page.h>
  26 #include <asm/setup.h>
  27
  28 void __init xen_efi_init(void)
  29 {
  30         efi_system_table_t *efi_systab_xen;
  31
  32         efi_systab_xen = xen_efi_probe();
  33
  34         if (efi_systab_xen == NULL)
  35                 return;
  36
  37         strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen",
  38                         sizeof(boot_params.efi_info.efi_loader_signature));
  39         boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen);
  40         boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32);
  41
  42         set_bit(EFI_BOOT, &efi.flags);
  43         set_bit(EFI_PARAVIRT, &efi.flags);
  44         set_bit(EFI_64BIT, &efi.flags);
  45 }