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/i386/fw_cfg.h" 34 #include "hw/i386/microvm.h" 35 #include "hw/pci/pci.h" 36 #include "hw/pci/pcie_host.h" 37 #include "hw/usb/xhci.h" 38 #include "hw/virtio/virtio-mmio.h" 39 40 #include "acpi-common.h" 41 #include "acpi-microvm.h" 42 43 static void acpi_dsdt_add_virtio(Aml *scope, 44 MicrovmMachineState *mms) 45 { 46 gchar *separator; 47 long int index; 48 BusState *bus; 49 BusChild *kid; 50 51 bus = sysbus_get_default(); 52 QTAILQ_FOREACH(kid, &bus->children, sibling) { 53 DeviceState *dev = kid->child; 54 Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO); 55 56 if (obj) { 57 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); 58 VirtioBusState *mmio_virtio_bus = &mmio->bus; 59 BusState *mmio_bus = &mmio_virtio_bus->parent_obj; 60 61 if (QTAILQ_EMPTY(&mmio_bus->children)) { 62 continue; 63 } 64 separator = g_strrstr(mmio_bus->name, "."); 65 if (!separator) { 66 continue; 67 } 68 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { 69 continue; 70 } 71 72 uint32_t irq = mms->virtio_irq_base + index; 73 hwaddr base = VIRTIO_MMIO_BASE + index * 512; 74 hwaddr size = 512; 75 76 Aml *dev = aml_device("VR%02u", (unsigned)index); 77 aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005"))); 78 aml_append(dev, aml_name_decl("_UID", aml_int(index))); 79 aml_append(dev, aml_name_decl("_CCA", aml_int(1))); 80 81 Aml *crs = aml_resource_template(); 82 aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE)); 83 aml_append(crs, 84 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH, 85 AML_EXCLUSIVE, &irq, 1)); 86 aml_append(dev, aml_name_decl("_CRS", crs)); 87 aml_append(scope, dev); 88 } 89 } 90 } 91 92 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) 93 { 94 if (machine_usb(MACHINE(mms))) { 95 xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); 96 } 97 } 98 99 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) 100 { 101 if (mms->pcie != ON_OFF_AUTO_ON) { 102 return; 103 } 104 105 acpi_dsdt_add_gpex(scope, &mms->gpex); 106 } 107 108 static void 109 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, 110 MicrovmMachineState *mms) 111 { 112 X86MachineState *x86ms = X86_MACHINE(mms); 113 Aml *dsdt, *sb_scope, *scope, *pkg; 114 bool ambiguous; 115 Object *isabus; 116 AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id, 117 .oem_table_id = x86ms->oem_table_id }; 118 119 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 120 assert(isabus); 121 assert(!ambiguous); 122 123 acpi_table_begin(&table, table_data); 124 dsdt = init_aml_allocator(); 125 126 sb_scope = aml_scope("_SB"); 127 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); 128 isa_build_aml(ISA_BUS(isabus), sb_scope); 129 build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev, 130 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); 131 acpi_dsdt_add_power_button(sb_scope); 132 acpi_dsdt_add_virtio(sb_scope, mms); 133 acpi_dsdt_add_xhci(sb_scope, mms); 134 acpi_dsdt_add_pci(sb_scope, mms); 135 aml_append(dsdt, sb_scope); 136 137 /* ACPI 5.0: Table 7-209 System State Package */ 138 scope = aml_scope("\\"); 139 pkg = aml_package(4); 140 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 141 aml_append(pkg, aml_int(0)); /* ignored */ 142 aml_append(pkg, aml_int(0)); /* reserved */ 143 aml_append(pkg, aml_int(0)); /* reserved */ 144 aml_append(scope, aml_name_decl("_S5", pkg)); 145 aml_append(dsdt, scope); 146 147 /* copy AML bytecode into ACPI tables blob */ 148 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 149 150 acpi_table_end(linker, &table); 151 free_aml_allocator(); 152 } 153 154 static void acpi_build_microvm(AcpiBuildTables *tables, 155 MicrovmMachineState *mms) 156 { 157 MachineState *machine = MACHINE(mms); 158 X86MachineState *x86ms = X86_MACHINE(mms); 159 GArray *table_offsets; 160 GArray *tables_blob = tables->table_data; 161 unsigned dsdt, xsdt; 162 AcpiFadtData pmfadt = { 163 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 164 .rev = 5, 165 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 166 (1 << ACPI_FADT_F_RESET_REG_SUP)), 167 168 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 169 .sleep_ctl = { 170 .space_id = AML_AS_SYSTEM_MEMORY, 171 .bit_width = 8, 172 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 173 }, 174 .sleep_sts = { 175 .space_id = AML_AS_SYSTEM_MEMORY, 176 .bit_width = 8, 177 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 178 }, 179 180 /* ACPI 5.0: 4.8.3.6 Reset Register */ 181 .reset_reg = { 182 .space_id = AML_AS_SYSTEM_MEMORY, 183 .bit_width = 8, 184 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 185 }, 186 .reset_val = ACPI_GED_RESET_VALUE, 187 }; 188 189 table_offsets = g_array_new(false, true /* clear */, 190 sizeof(uint32_t)); 191 bios_linker_loader_alloc(tables->linker, 192 ACPI_BUILD_TABLE_FILE, tables_blob, 193 64 /* Ensure FACS is aligned */, 194 false /* high memory */); 195 196 dsdt = tables_blob->len; 197 build_dsdt_microvm(tables_blob, tables->linker, mms); 198 199 pmfadt.dsdt_tbl_offset = &dsdt; 200 pmfadt.xdsdt_tbl_offset = &dsdt; 201 acpi_add_table(table_offsets, tables_blob); 202 build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id, 203 x86ms->oem_table_id); 204 205 acpi_add_table(table_offsets, tables_blob); 206 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 207 ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id, 208 x86ms->oem_table_id); 209 210 xsdt = tables_blob->len; 211 build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id, 212 x86ms->oem_table_id); 213 214 /* RSDP is in FSEG memory, so allocate it separately */ 215 { 216 AcpiRsdpData rsdp_data = { 217 /* ACPI 2.0: 5.2.4.3 RSDP Structure */ 218 .revision = 2, /* xsdt needs v2 */ 219 .oem_id = x86ms->oem_id, 220 .xsdt_tbl_offset = &xsdt, 221 .rsdt_tbl_offset = NULL, 222 }; 223 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 224 } 225 226 /* Cleanup memory that's no longer used. */ 227 g_array_free(table_offsets, true); 228 } 229 230 static void acpi_build_no_update(void *build_opaque) 231 { 232 /* nothing, microvm tables don't change at runtime */ 233 } 234 235 void acpi_setup_microvm(MicrovmMachineState *mms) 236 { 237 X86MachineState *x86ms = X86_MACHINE(mms); 238 AcpiBuildTables tables; 239 240 assert(x86ms->fw_cfg); 241 242 if (!x86_machine_is_acpi_enabled(x86ms)) { 243 return; 244 } 245 246 acpi_build_tables_init(&tables); 247 acpi_build_microvm(&tables, mms); 248 249 /* Now expose it all to Guest */ 250 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data, 251 ACPI_BUILD_TABLE_FILE); 252 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob, 253 ACPI_BUILD_LOADER_FILE); 254 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp, 255 ACPI_BUILD_RSDP_FILE); 256 257 acpi_build_tables_cleanup(&tables, false); 258 } 259