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/boards.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/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_pci(Aml *scope, MicrovmMachineState *mms) 93 { 94 if (mms->pcie != ON_OFF_AUTO_ON) { 95 return; 96 } 97 98 acpi_dsdt_add_gpex(scope, &mms->gpex); 99 } 100 101 static void 102 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, 103 MicrovmMachineState *mms) 104 { 105 X86MachineState *x86ms = X86_MACHINE(mms); 106 Aml *dsdt, *sb_scope, *scope, *pkg; 107 bool ambiguous; 108 Object *isabus; 109 110 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 111 assert(isabus); 112 assert(!ambiguous); 113 114 dsdt = init_aml_allocator(); 115 116 /* Reserve space for header */ 117 acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader)); 118 119 sb_scope = aml_scope("_SB"); 120 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); 121 isa_build_aml(ISA_BUS(isabus), sb_scope); 122 build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev, 123 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); 124 acpi_dsdt_add_power_button(sb_scope); 125 acpi_dsdt_add_virtio(sb_scope, mms); 126 acpi_dsdt_add_pci(sb_scope, mms); 127 aml_append(dsdt, sb_scope); 128 129 /* ACPI 5.0: Table 7-209 System State Package */ 130 scope = aml_scope("\\"); 131 pkg = aml_package(4); 132 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 133 aml_append(pkg, aml_int(0)); /* ignored */ 134 aml_append(pkg, aml_int(0)); /* reserved */ 135 aml_append(pkg, aml_int(0)); /* reserved */ 136 aml_append(scope, aml_name_decl("_S5", pkg)); 137 aml_append(dsdt, scope); 138 139 /* copy AML table into ACPI tables blob and patch header there */ 140 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 141 build_header(linker, table_data, 142 (void *)(table_data->data + table_data->len - dsdt->buf->len), 143 "DSDT", dsdt->buf->len, 2, NULL, NULL); 144 free_aml_allocator(); 145 } 146 147 static void acpi_build_microvm(AcpiBuildTables *tables, 148 MicrovmMachineState *mms) 149 { 150 MachineState *machine = MACHINE(mms); 151 X86MachineState *x86ms = X86_MACHINE(mms); 152 GArray *table_offsets; 153 GArray *tables_blob = tables->table_data; 154 unsigned dsdt, xsdt; 155 AcpiFadtData pmfadt = { 156 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 157 .rev = 5, 158 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 159 (1 << ACPI_FADT_F_RESET_REG_SUP)), 160 161 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 162 .sleep_ctl = { 163 .space_id = AML_AS_SYSTEM_MEMORY, 164 .bit_width = 8, 165 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 166 }, 167 .sleep_sts = { 168 .space_id = AML_AS_SYSTEM_MEMORY, 169 .bit_width = 8, 170 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 171 }, 172 173 /* ACPI 5.0: 4.8.3.6 Reset Register */ 174 .reset_reg = { 175 .space_id = AML_AS_SYSTEM_MEMORY, 176 .bit_width = 8, 177 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 178 }, 179 .reset_val = ACPI_GED_RESET_VALUE, 180 }; 181 182 table_offsets = g_array_new(false, true /* clear */, 183 sizeof(uint32_t)); 184 bios_linker_loader_alloc(tables->linker, 185 ACPI_BUILD_TABLE_FILE, tables_blob, 186 64 /* Ensure FACS is aligned */, 187 false /* high memory */); 188 189 dsdt = tables_blob->len; 190 build_dsdt_microvm(tables_blob, tables->linker, mms); 191 192 pmfadt.dsdt_tbl_offset = &dsdt; 193 pmfadt.xdsdt_tbl_offset = &dsdt; 194 acpi_add_table(table_offsets, tables_blob); 195 build_fadt(tables_blob, tables->linker, &pmfadt, NULL, NULL); 196 197 acpi_add_table(table_offsets, tables_blob); 198 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 199 ACPI_DEVICE_IF(x86ms->acpi_dev), false); 200 201 xsdt = tables_blob->len; 202 build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL); 203 204 /* RSDP is in FSEG memory, so allocate it separately */ 205 { 206 AcpiRsdpData rsdp_data = { 207 /* ACPI 2.0: 5.2.4.3 RSDP Structure */ 208 .revision = 2, /* xsdt needs v2 */ 209 .oem_id = ACPI_BUILD_APPNAME6, 210 .xsdt_tbl_offset = &xsdt, 211 .rsdt_tbl_offset = NULL, 212 }; 213 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 214 } 215 216 /* Cleanup memory that's no longer used. */ 217 g_array_free(table_offsets, true); 218 } 219 220 static void acpi_build_no_update(void *build_opaque) 221 { 222 /* nothing, microvm tables don't change at runtime */ 223 } 224 225 void acpi_setup_microvm(MicrovmMachineState *mms) 226 { 227 X86MachineState *x86ms = X86_MACHINE(mms); 228 AcpiBuildTables tables; 229 230 assert(x86ms->fw_cfg); 231 232 if (!x86_machine_is_acpi_enabled(x86ms)) { 233 return; 234 } 235 236 acpi_build_tables_init(&tables); 237 acpi_build_microvm(&tables, mms); 238 239 /* Now expose it all to Guest */ 240 acpi_add_rom_blob(acpi_build_no_update, NULL, 241 tables.table_data, 242 ACPI_BUILD_TABLE_FILE, 243 ACPI_BUILD_TABLE_MAX_SIZE); 244 acpi_add_rom_blob(acpi_build_no_update, NULL, 245 tables.linker->cmd_blob, 246 "etc/table-loader", 0); 247 acpi_add_rom_blob(acpi_build_no_update, NULL, 248 tables.rsdp, 249 ACPI_BUILD_RSDP_FILE, 0); 250 251 acpi_build_tables_cleanup(&tables, false); 252 } 253