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 "qemu/cutils.h" 25 #include "qapi/error.h" 26 27 #include "system/memory.h" 28 #include "hw/acpi/acpi.h" 29 #include "hw/acpi/acpi_aml_interface.h" 30 #include "hw/acpi/aml-build.h" 31 #include "hw/acpi/bios-linker-loader.h" 32 #include "hw/acpi/generic_event_device.h" 33 #include "hw/acpi/utils.h" 34 #include "hw/acpi/erst.h" 35 #include "hw/i386/fw_cfg.h" 36 #include "hw/i386/microvm.h" 37 #include "hw/pci/pci.h" 38 #include "hw/pci/pcie_host.h" 39 #include "hw/usb/xhci.h" 40 #include "hw/virtio/virtio-acpi.h" 41 #include "hw/virtio/virtio-mmio.h" 42 #include "hw/input/i8042.h" 43 44 #include "acpi-common.h" 45 #include "acpi-microvm.h" 46 47 #include CONFIG_DEVICES 48 49 static void acpi_dsdt_add_virtio(Aml *scope, 50 MicrovmMachineState *mms) 51 { 52 gchar *separator; 53 long int index; 54 BusState *bus; 55 BusChild *kid; 56 57 bus = sysbus_get_default(); 58 QTAILQ_FOREACH(kid, &bus->children, sibling) { 59 Object *obj = object_dynamic_cast(OBJECT(kid->child), 60 TYPE_VIRTIO_MMIO); 61 62 if (obj) { 63 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); 64 VirtioBusState *mmio_virtio_bus = &mmio->bus; 65 BusState *mmio_bus = &mmio_virtio_bus->parent_obj; 66 67 if (QTAILQ_EMPTY(&mmio_bus->children)) { 68 continue; 69 } 70 separator = g_strrstr(mmio_bus->name, "."); 71 if (!separator) { 72 continue; 73 } 74 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { 75 continue; 76 } 77 78 uint32_t irq = mms->virtio_irq_base + index; 79 hwaddr base = VIRTIO_MMIO_BASE + index * 512; 80 hwaddr size = 512; 81 virtio_acpi_dsdt_add(scope, base, size, irq, index, 1); 82 } 83 } 84 } 85 86 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) 87 { 88 if (machine_usb(MACHINE(mms))) { 89 xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); 90 } 91 } 92 93 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) 94 { 95 if (mms->pcie != ON_OFF_AUTO_ON) { 96 return; 97 } 98 99 acpi_dsdt_add_gpex(scope, &mms->gpex); 100 } 101 102 static void 103 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, 104 MicrovmMachineState *mms) 105 { 106 X86MachineState *x86ms = X86_MACHINE(mms); 107 Aml *dsdt, *sb_scope, *scope, *pkg; 108 bool ambiguous; 109 Object *isabus; 110 AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id, 111 .oem_table_id = x86ms->oem_table_id }; 112 113 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 114 assert(isabus); 115 assert(!ambiguous); 116 117 acpi_table_begin(&table, table_data); 118 dsdt = init_aml_allocator(); 119 120 sb_scope = aml_scope("_SB"); 121 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); 122 qbus_build_aml(BUS(isabus), sb_scope); 123 build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev, 124 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); 125 acpi_dsdt_add_power_button(sb_scope); 126 acpi_dsdt_add_virtio(sb_scope, mms); 127 acpi_dsdt_add_xhci(sb_scope, mms); 128 acpi_dsdt_add_pci(sb_scope, mms); 129 aml_append(dsdt, sb_scope); 130 131 /* ACPI 5.0: Table 7-209 System State Package */ 132 scope = aml_scope("\\"); 133 pkg = aml_package(4); 134 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 135 aml_append(pkg, aml_int(0)); /* ignored */ 136 aml_append(pkg, aml_int(0)); /* reserved */ 137 aml_append(pkg, aml_int(0)); /* reserved */ 138 aml_append(scope, aml_name_decl("_S5", pkg)); 139 aml_append(dsdt, scope); 140 141 /* copy AML bytecode into ACPI tables blob */ 142 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 143 144 acpi_table_end(linker, &table); 145 free_aml_allocator(); 146 } 147 148 static void acpi_build_microvm(AcpiBuildTables *tables, 149 MicrovmMachineState *mms) 150 { 151 MachineState *machine = MACHINE(mms); 152 X86MachineState *x86ms = X86_MACHINE(mms); 153 GArray *table_offsets; 154 GArray *tables_blob = tables->table_data; 155 unsigned dsdt, xsdt; 156 AcpiFadtData pmfadt = { 157 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 158 .rev = 5, 159 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 160 (1 << ACPI_FADT_F_RESET_REG_SUP)), 161 162 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 163 .sleep_ctl = { 164 .space_id = AML_AS_SYSTEM_MEMORY, 165 .bit_width = 8, 166 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 167 }, 168 .sleep_sts = { 169 .space_id = AML_AS_SYSTEM_MEMORY, 170 .bit_width = 8, 171 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 172 }, 173 174 /* ACPI 5.0: 4.8.3.6 Reset Register */ 175 .reset_reg = { 176 .space_id = AML_AS_SYSTEM_MEMORY, 177 .bit_width = 8, 178 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 179 }, 180 .reset_val = ACPI_GED_RESET_VALUE, 181 /* 182 * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture 183 * Flags, bit offset 1 - 8042. 184 */ 185 .iapc_boot_arch = iapc_boot_arch_8042(), 186 }; 187 188 table_offsets = g_array_new(false, true /* clear */, 189 sizeof(uint32_t)); 190 bios_linker_loader_alloc(tables->linker, 191 ACPI_BUILD_TABLE_FILE, tables_blob, 192 64 /* Ensure FACS is aligned */, 193 false /* high memory */); 194 195 dsdt = tables_blob->len; 196 build_dsdt_microvm(tables_blob, tables->linker, mms); 197 198 pmfadt.dsdt_tbl_offset = &dsdt; 199 pmfadt.xdsdt_tbl_offset = &dsdt; 200 acpi_add_table(table_offsets, tables_blob); 201 build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id, 202 x86ms->oem_table_id); 203 204 acpi_add_table(table_offsets, tables_blob); 205 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 206 x86ms->oem_id, x86ms->oem_table_id); 207 208 #ifdef CONFIG_ACPI_ERST 209 { 210 Object *erst_dev; 211 erst_dev = find_erst_dev(); 212 if (erst_dev) { 213 acpi_add_table(table_offsets, tables_blob); 214 build_erst(tables_blob, tables->linker, erst_dev, 215 x86ms->oem_id, x86ms->oem_table_id); 216 } 217 } 218 #endif 219 220 xsdt = tables_blob->len; 221 build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id, 222 x86ms->oem_table_id); 223 224 /* RSDP is in FSEG memory, so allocate it separately */ 225 { 226 AcpiRsdpData rsdp_data = { 227 /* ACPI 2.0: 5.2.4.3 RSDP Structure */ 228 .revision = 2, /* xsdt needs v2 */ 229 .oem_id = x86ms->oem_id, 230 .xsdt_tbl_offset = &xsdt, 231 .rsdt_tbl_offset = NULL, 232 }; 233 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 234 } 235 236 /* Cleanup memory that's no longer used. */ 237 g_array_free(table_offsets, true); 238 } 239 240 static void acpi_build_no_update(void *build_opaque) 241 { 242 /* nothing, microvm tables don't change at runtime */ 243 } 244 245 void acpi_setup_microvm(MicrovmMachineState *mms) 246 { 247 X86MachineState *x86ms = X86_MACHINE(mms); 248 AcpiBuildTables tables; 249 250 assert(x86ms->fw_cfg); 251 252 if (!x86_machine_is_acpi_enabled(x86ms)) { 253 return; 254 } 255 256 acpi_build_tables_init(&tables); 257 acpi_build_microvm(&tables, mms); 258 259 /* Now expose it all to Guest */ 260 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data, 261 ACPI_BUILD_TABLE_FILE); 262 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob, 263 ACPI_BUILD_LOADER_FILE); 264 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp, 265 ACPI_BUILD_RSDP_FILE); 266 267 acpi_build_tables_cleanup(&tables, false); 268 } 269