hw/acpi/utils.c

   1 /*
   2  * Utilities for generating ACPI tables and passing them to Guests
   3  *
   4  * Copyright (C) 2019 Intel Corporation
   5  * Copyright (C) 2019 Red Hat Inc
   6  *
   7  * Author: Wei Yang <richardw.yang@linux.intel.com>
   8  * Author: Michael S. Tsirkin <mst@redhat.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "qemu/osdep.h"
  25 #include "hw/acpi/aml-build.h"
  26 #include "hw/acpi/utils.h"
  27 #include "hw/loader.h"
  28
  29 MemoryRegion *acpi_add_rom_blob(FWCfgCallback update, void *opaque,
  30                                 GArray *blob, const char *name)
  31 {
  32     uint64_t max_size;
  33
  34     /* Reserve RAM space for tables: add another order of magnitude. */
  35     if (!strcmp(name, ACPI_BUILD_TABLE_FILE)) {
  36         max_size = 0x200000;
  37     } else if (!strcmp(name, ACPI_BUILD_LOADER_FILE)) {
  38         max_size = 0x10000;
  39     } else if (!strcmp(name, ACPI_BUILD_RSDP_FILE)) {
  40         max_size = 0x1000;
  41     } else {
  42         g_assert_not_reached();
  43     }
  44     g_assert(acpi_data_len(blob) <= max_size);
  45
  46     return rom_add_blob(name, blob->data, acpi_data_len(blob), max_size, -1,
  47                         name, update, opaque, NULL, true);
  48 }