acpi-microvm.c (9229B)
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/aml-build.h" 30 #include "hw/acpi/bios-linker-loader.h" 31 #include "hw/acpi/generic_event_device.h" 32 #include "hw/acpi/utils.h" 33 #include "hw/acpi/erst.h" 34 #include "hw/i386/fw_cfg.h" 35 #include "hw/i386/microvm.h" 36 #include "hw/pci/pci.h" 37 #include "hw/pci/pcie_host.h" 38 #include "hw/usb/xhci.h" 39 #include "hw/virtio/virtio-mmio.h" 40 #include "hw/input/i8042.h" 41 42 #include "acpi-common.h" 43 #include "acpi-microvm.h" 44 45 #include CONFIG_DEVICES 46 47 static void acpi_dsdt_add_virtio(Aml *scope, 48 MicrovmMachineState *mms) 49 { 50 gchar *separator; 51 long int index; 52 BusState *bus; 53 BusChild *kid; 54 55 bus = sysbus_get_default(); 56 QTAILQ_FOREACH(kid, &bus->children, sibling) { 57 DeviceState *dev = kid->child; 58 Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO); 59 60 if (obj) { 61 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); 62 VirtioBusState *mmio_virtio_bus = &mmio->bus; 63 BusState *mmio_bus = &mmio_virtio_bus->parent_obj; 64 65 if (QTAILQ_EMPTY(&mmio_bus->children)) { 66 continue; 67 } 68 separator = g_strrstr(mmio_bus->name, "."); 69 if (!separator) { 70 continue; 71 } 72 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { 73 continue; 74 } 75 76 uint32_t irq = mms->virtio_irq_base + index; 77 hwaddr base = VIRTIO_MMIO_BASE + index * 512; 78 hwaddr size = 512; 79 80 Aml *dev = aml_device("VR%02u", (unsigned)index); 81 aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005"))); 82 aml_append(dev, aml_name_decl("_UID", aml_int(index))); 83 aml_append(dev, aml_name_decl("_CCA", aml_int(1))); 84 85 Aml *crs = aml_resource_template(); 86 aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE)); 87 aml_append(crs, 88 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH, 89 AML_EXCLUSIVE, &irq, 1)); 90 aml_append(dev, aml_name_decl("_CRS", crs)); 91 aml_append(scope, dev); 92 } 93 } 94 } 95 96 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) 97 { 98 if (machine_usb(MACHINE(mms))) { 99 xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); 100 } 101 } 102 103 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) 104 { 105 if (mms->pcie != ON_OFF_AUTO_ON) { 106 return; 107 } 108 109 acpi_dsdt_add_gpex(scope, &mms->gpex); 110 } 111 112 static void 113 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, 114 MicrovmMachineState *mms) 115 { 116 X86MachineState *x86ms = X86_MACHINE(mms); 117 Aml *dsdt, *sb_scope, *scope, *pkg; 118 bool ambiguous; 119 Object *isabus; 120 AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id, 121 .oem_table_id = x86ms->oem_table_id }; 122 123 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 124 assert(isabus); 125 assert(!ambiguous); 126 127 acpi_table_begin(&table, table_data); 128 dsdt = init_aml_allocator(); 129 130 sb_scope = aml_scope("_SB"); 131 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); 132 isa_build_aml(ISA_BUS(isabus), sb_scope); 133 build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev, 134 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); 135 acpi_dsdt_add_power_button(sb_scope); 136 acpi_dsdt_add_virtio(sb_scope, mms); 137 acpi_dsdt_add_xhci(sb_scope, mms); 138 acpi_dsdt_add_pci(sb_scope, mms); 139 aml_append(dsdt, sb_scope); 140 141 /* ACPI 5.0: Table 7-209 System State Package */ 142 scope = aml_scope("\\"); 143 pkg = aml_package(4); 144 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 145 aml_append(pkg, aml_int(0)); /* ignored */ 146 aml_append(pkg, aml_int(0)); /* reserved */ 147 aml_append(pkg, aml_int(0)); /* reserved */ 148 aml_append(scope, aml_name_decl("_S5", pkg)); 149 aml_append(dsdt, scope); 150 151 /* copy AML bytecode into ACPI tables blob */ 152 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 153 154 acpi_table_end(linker, &table); 155 free_aml_allocator(); 156 } 157 158 static void acpi_build_microvm(AcpiBuildTables *tables, 159 MicrovmMachineState *mms) 160 { 161 MachineState *machine = MACHINE(mms); 162 X86MachineState *x86ms = X86_MACHINE(mms); 163 GArray *table_offsets; 164 GArray *tables_blob = tables->table_data; 165 unsigned dsdt, xsdt; 166 AcpiFadtData pmfadt = { 167 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 168 .rev = 5, 169 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 170 (1 << ACPI_FADT_F_RESET_REG_SUP)), 171 172 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 173 .sleep_ctl = { 174 .space_id = AML_AS_SYSTEM_MEMORY, 175 .bit_width = 8, 176 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 177 }, 178 .sleep_sts = { 179 .space_id = AML_AS_SYSTEM_MEMORY, 180 .bit_width = 8, 181 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 182 }, 183 184 /* ACPI 5.0: 4.8.3.6 Reset Register */ 185 .reset_reg = { 186 .space_id = AML_AS_SYSTEM_MEMORY, 187 .bit_width = 8, 188 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 189 }, 190 .reset_val = ACPI_GED_RESET_VALUE, 191 /* 192 * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture 193 * Flags, bit offset 1 - 8042. 194 */ 195 .iapc_boot_arch = iapc_boot_arch_8042(), 196 }; 197 198 table_offsets = g_array_new(false, true /* clear */, 199 sizeof(uint32_t)); 200 bios_linker_loader_alloc(tables->linker, 201 ACPI_BUILD_TABLE_FILE, tables_blob, 202 64 /* Ensure FACS is aligned */, 203 false /* high memory */); 204 205 dsdt = tables_blob->len; 206 build_dsdt_microvm(tables_blob, tables->linker, mms); 207 208 pmfadt.dsdt_tbl_offset = &dsdt; 209 pmfadt.xdsdt_tbl_offset = &dsdt; 210 acpi_add_table(table_offsets, tables_blob); 211 build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id, 212 x86ms->oem_table_id); 213 214 acpi_add_table(table_offsets, tables_blob); 215 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 216 ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id, 217 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 }