hw/i386/acpi-microvm.c

   1 /* Support for generating ACPI tables and passing them to Guests
   2  *
   3  * Copyright (C) 2008-2010  Kevin O'Connor <kevin@koconnor.net>
   4  * Copyright (C) 2006 Fabrice Bellard
   5  * Copyright (C) 2013 Red Hat Inc
   6  *
   7  * Author: Michael S. Tsirkin <mst@redhat.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "qapi/error.h"
  25
  26 #include "exec/memory.h"
  27 #include "hw/acpi/acpi.h"
  28 #include "hw/acpi/aml-build.h"
  29 #include "hw/acpi/bios-linker-loader.h"
  30 #include "hw/acpi/generic_event_device.h"
  31 #include "hw/acpi/utils.h"
  32 #include "hw/boards.h"
  33 #include "hw/i386/fw_cfg.h"
  34 #include "hw/i386/microvm.h"
  35
  36 #include "acpi-common.h"
  37 #include "acpi-microvm.h"
  38
  39 static void
  40 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
  41                    MicrovmMachineState *mms)
  42 {
  43     X86MachineState *x86ms = X86_MACHINE(mms);
  44     Aml *dsdt, *sb_scope, *scope, *pkg;
  45     bool ambiguous;
  46     Object *isabus;
  47
  48     isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
  49     assert(isabus);
  50     assert(!ambiguous);
  51
  52     dsdt = init_aml_allocator();
  53
  54     /* Reserve space for header */
  55     acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader));
  56
  57     sb_scope = aml_scope("_SB");
  58     fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
  59     isa_build_aml(ISA_BUS(isabus), sb_scope);
  60     build_ged_aml(sb_scope, GED_DEVICE, HOTPLUG_HANDLER(mms->acpi_dev),
  61                   GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
  62     acpi_dsdt_add_power_button(sb_scope);
  63     aml_append(dsdt, sb_scope);
  64
  65     /* ACPI 5.0: Table 7-209 System State Package */
  66     scope = aml_scope("\\");
  67     pkg = aml_package(4);
  68     aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
  69     aml_append(pkg, aml_int(0)); /* ignored */
  70     aml_append(pkg, aml_int(0)); /* reserved */
  71     aml_append(pkg, aml_int(0)); /* reserved */
  72     aml_append(scope, aml_name_decl("_S5", pkg));
  73     aml_append(dsdt, scope);
  74
  75     /* copy AML table into ACPI tables blob and patch header there */
  76     g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
  77     build_header(linker, table_data,
  78         (void *)(table_data->data + table_data->len - dsdt->buf->len),
  79         "DSDT", dsdt->buf->len, 2, NULL, NULL);
  80     free_aml_allocator();
  81 }
  82
  83 static void acpi_build_microvm(AcpiBuildTables *tables,
  84                                MicrovmMachineState *mms)
  85 {
  86     MachineState *machine = MACHINE(mms);
  87     GArray *table_offsets;
  88     GArray *tables_blob = tables->table_data;
  89     unsigned dsdt, xsdt;
  90     AcpiFadtData pmfadt = {
  91         /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
  92         .rev = 5,
  93         .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
  94                   (1 << ACPI_FADT_F_RESET_REG_SUP)),
  95
  96         /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
  97         .sleep_ctl = {
  98             .space_id = AML_AS_SYSTEM_MEMORY,
  99             .bit_width = 8,
 100             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
 101         },
 102         .sleep_sts = {
 103             .space_id = AML_AS_SYSTEM_MEMORY,
 104             .bit_width = 8,
 105             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
 106         },
 107
 108         /* ACPI 5.0: 4.8.3.6 Reset Register */
 109         .reset_reg = {
 110             .space_id = AML_AS_SYSTEM_MEMORY,
 111             .bit_width = 8,
 112             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
 113         },
 114         .reset_val = ACPI_GED_RESET_VALUE,
 115     };
 116
 117     table_offsets = g_array_new(false, true /* clear */,
 118                                         sizeof(uint32_t));
 119     bios_linker_loader_alloc(tables->linker,
 120                              ACPI_BUILD_TABLE_FILE, tables_blob,
 121                              64 /* Ensure FACS is aligned */,
 122                              false /* high memory */);
 123
 124     dsdt = tables_blob->len;
 125     build_dsdt_microvm(tables_blob, tables->linker, mms);
 126
 127     pmfadt.dsdt_tbl_offset = &dsdt;
 128     pmfadt.xdsdt_tbl_offset = &dsdt;
 129     acpi_add_table(table_offsets, tables_blob);
 130     build_fadt(tables_blob, tables->linker, &pmfadt, NULL, NULL);
 131
 132     acpi_add_table(table_offsets, tables_blob);
 133     acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
 134                     mms->acpi_dev, false);
 135
 136     xsdt = tables_blob->len;
 137     build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL);
 138
 139     /* RSDP is in FSEG memory, so allocate it separately */
 140     {
 141         AcpiRsdpData rsdp_data = {
 142             /* ACPI 2.0: 5.2.4.3 RSDP Structure */
 143             .revision = 2, /* xsdt needs v2 */
 144             .oem_id = ACPI_BUILD_APPNAME6,
 145             .xsdt_tbl_offset = &xsdt,
 146             .rsdt_tbl_offset = NULL,
 147         };
 148         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
 149     }
 150
 151     /* Cleanup memory that's no longer used. */
 152     g_array_free(table_offsets, true);
 153 }
 154
 155 static void acpi_build_no_update(void *build_opaque)
 156 {
 157     /* nothing, microvm tables don't change at runtime */
 158 }
 159
 160 void acpi_setup_microvm(MicrovmMachineState *mms)
 161 {
 162     X86MachineState *x86ms = X86_MACHINE(mms);
 163     AcpiBuildTables tables;
 164
 165     assert(x86ms->fw_cfg);
 166
 167     if (!x86_machine_is_acpi_enabled(x86ms)) {
 168         return;
 169     }
 170
 171     acpi_build_tables_init(&tables);
 172     acpi_build_microvm(&tables, mms);
 173
 174     /* Now expose it all to Guest */
 175     acpi_add_rom_blob(acpi_build_no_update, NULL,
 176                       tables.table_data,
 177                       ACPI_BUILD_TABLE_FILE,
 178                       ACPI_BUILD_TABLE_MAX_SIZE);
 179     acpi_add_rom_blob(acpi_build_no_update, NULL,
 180                       tables.linker->cmd_blob,
 181                       "etc/table-loader", 0);
 182     acpi_add_rom_blob(acpi_build_no_update, NULL,
 183                       tables.rsdp,
 184                       ACPI_BUILD_RSDP_FILE, 0);
 185
 186     acpi_build_tables_cleanup(&tables, false);
 187 }