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 } 188