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 "exec/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-mmio.h" 41 #include "hw/input/i8042.h" 42 43 #include "acpi-common.h" 44 #include "acpi-microvm.h" 45 46 #include CONFIG_DEVICES 47 48 static void acpi_dsdt_add_virtio(Aml *scope, 49 MicrovmMachineState *mms) 50 { 51 gchar *separator; 52 long int index; 53 BusState *bus; 54 BusChild *kid; 55 56 bus = sysbus_get_default(); 57 QTAILQ_FOREACH(kid, &bus->children, sibling) { 58 Object *obj = object_dynamic_cast(OBJECT(kid->child), 59 TYPE_VIRTIO_MMIO); 60 61 if (obj) { 62 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); 63 VirtioBusState *mmio_virtio_bus = &mmio->bus; 64 BusState *mmio_bus = &mmio_virtio_bus->parent_obj; 65 66 if (QTAILQ_EMPTY(&mmio_bus->children)) { 67 continue; 68 } 69 separator = g_strrstr(mmio_bus->name, "."); 70 if (!separator) { 71 continue; 72 } 73 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { 74 continue; 75 } 76 77 uint32_t irq = mms->virtio_irq_base + index; 78 hwaddr base = VIRTIO_MMIO_BASE + index * 512; 79 hwaddr size = 512; 80 81 Aml *dev = aml_device("VR%02u", (unsigned)index); 82 aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005"))); 83 aml_append(dev, aml_name_decl("_UID", aml_int(index))); 84 aml_append(dev, aml_name_decl("_CCA", aml_int(1))); 85 86 Aml *crs = aml_resource_template(); 87 aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE)); 88 aml_append(crs, 89 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH, 90 AML_EXCLUSIVE, &irq, 1)); 91 aml_append(dev, aml_name_decl("_CRS", crs)); 92 aml_append(scope, dev); 93 } 94 } 95 } 96 97 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) 98 { 99 if (machine_usb(MACHINE(mms))) { 100 xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); 101 } 102 } 103 104 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) 105 { 106 if (mms->pcie != ON_OFF_AUTO_ON) { 107 return; 108 } 109 110 acpi_dsdt_add_gpex(scope, &mms->gpex); 111 } 112 113 static void 114 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, 115 MicrovmMachineState *mms) 116 { 117 X86MachineState *x86ms = X86_MACHINE(mms); 118 Aml *dsdt, *sb_scope, *scope, *pkg; 119 bool ambiguous; 120 Object *isabus; 121 AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id, 122 .oem_table_id = x86ms->oem_table_id }; 123 124 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 125 assert(isabus); 126 assert(!ambiguous); 127 128 acpi_table_begin(&table, table_data); 129 dsdt = init_aml_allocator(); 130 131 sb_scope = aml_scope("_SB"); 132 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); 133 qbus_build_aml(BUS(isabus), sb_scope); 134 build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev, 135 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); 136 acpi_dsdt_add_power_button(sb_scope); 137 acpi_dsdt_add_virtio(sb_scope, mms); 138 acpi_dsdt_add_xhci(sb_scope, mms); 139 acpi_dsdt_add_pci(sb_scope, mms); 140 aml_append(dsdt, sb_scope); 141 142 /* ACPI 5.0: Table 7-209 System State Package */ 143 scope = aml_scope("\\"); 144 pkg = aml_package(4); 145 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 146 aml_append(pkg, aml_int(0)); /* ignored */ 147 aml_append(pkg, aml_int(0)); /* reserved */ 148 aml_append(pkg, aml_int(0)); /* reserved */ 149 aml_append(scope, aml_name_decl("_S5", pkg)); 150 aml_append(dsdt, scope); 151 152 /* copy AML bytecode into ACPI tables blob */ 153 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 154 155 acpi_table_end(linker, &table); 156 free_aml_allocator(); 157 } 158 159 static void acpi_build_microvm(AcpiBuildTables *tables, 160 MicrovmMachineState *mms) 161 { 162 MachineState *machine = MACHINE(mms); 163 X86MachineState *x86ms = X86_MACHINE(mms); 164 GArray *table_offsets; 165 GArray *tables_blob = tables->table_data; 166 unsigned dsdt, xsdt; 167 AcpiFadtData pmfadt = { 168 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 169 .rev = 5, 170 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 171 (1 << ACPI_FADT_F_RESET_REG_SUP)), 172 173 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 174 .sleep_ctl = { 175 .space_id = AML_AS_SYSTEM_MEMORY, 176 .bit_width = 8, 177 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 178 }, 179 .sleep_sts = { 180 .space_id = AML_AS_SYSTEM_MEMORY, 181 .bit_width = 8, 182 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 183 }, 184 185 /* ACPI 5.0: 4.8.3.6 Reset Register */ 186 .reset_reg = { 187 .space_id = AML_AS_SYSTEM_MEMORY, 188 .bit_width = 8, 189 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 190 }, 191 .reset_val = ACPI_GED_RESET_VALUE, 192 /* 193 * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture 194 * Flags, bit offset 1 - 8042. 195 */ 196 .iapc_boot_arch = iapc_boot_arch_8042(), 197 }; 198 199 table_offsets = g_array_new(false, true /* clear */, 200 sizeof(uint32_t)); 201 bios_linker_loader_alloc(tables->linker, 202 ACPI_BUILD_TABLE_FILE, tables_blob, 203 64 /* Ensure FACS is aligned */, 204 false /* high memory */); 205 206 dsdt = tables_blob->len; 207 build_dsdt_microvm(tables_blob, tables->linker, mms); 208 209 pmfadt.dsdt_tbl_offset = &dsdt; 210 pmfadt.xdsdt_tbl_offset = &dsdt; 211 acpi_add_table(table_offsets, tables_blob); 212 build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id, 213 x86ms->oem_table_id); 214 215 acpi_add_table(table_offsets, tables_blob); 216 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 217 x86ms->oem_id, x86ms->oem_table_id); 218 219 #ifdef CONFIG_ACPI_ERST 220 { 221 Object *erst_dev; 222 erst_dev = find_erst_dev(); 223 if (erst_dev) { 224 acpi_add_table(table_offsets, tables_blob); 225 build_erst(tables_blob, tables->linker, erst_dev, 226 x86ms->oem_id, x86ms->oem_table_id); 227 } 228 } 229 #endif 230 231 xsdt = tables_blob->len; 232 build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id, 233 x86ms->oem_table_id); 234 235 /* RSDP is in FSEG memory, so allocate it separately */ 236 { 237 AcpiRsdpData rsdp_data = { 238 /* ACPI 2.0: 5.2.4.3 RSDP Structure */ 239 .revision = 2, /* xsdt needs v2 */ 240 .oem_id = x86ms->oem_id, 241 .xsdt_tbl_offset = &xsdt, 242 .rsdt_tbl_offset = NULL, 243 }; 244 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 245 } 246 247 /* Cleanup memory that's no longer used. */ 248 g_array_free(table_offsets, true); 249 } 250 251 static void acpi_build_no_update(void *build_opaque) 252 { 253 /* nothing, microvm tables don't change at runtime */ 254 } 255 256 void acpi_setup_microvm(MicrovmMachineState *mms) 257 { 258 X86MachineState *x86ms = X86_MACHINE(mms); 259 AcpiBuildTables tables; 260 261 assert(x86ms->fw_cfg); 262 263 if (!x86_machine_is_acpi_enabled(x86ms)) { 264 return; 265 } 266 267 acpi_build_tables_init(&tables); 268 acpi_build_microvm(&tables, mms); 269 270 /* Now expose it all to Guest */ 271 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data, 272 ACPI_BUILD_TABLE_FILE); 273 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob, 274 ACPI_BUILD_LOADER_FILE); 275 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp, 276 ACPI_BUILD_RSDP_FILE); 277 278 acpi_build_tables_cleanup(&tables, false); 279 } 280