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/usb/xhci.h" 39 #include "hw/virtio/virtio-mmio.h" 40 41 #include "acpi-common.h" 42 #include "acpi-microvm.h" 43 44 static void acpi_dsdt_add_virtio(Aml *scope, 45 MicrovmMachineState *mms) 46 { 47 gchar *separator; 48 long int index; 49 BusState *bus; 50 BusChild *kid; 51 52 bus = sysbus_get_default(); 53 QTAILQ_FOREACH(kid, &bus->children, sibling) { 54 DeviceState *dev = kid->child; 55 Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO); 56 57 if (obj) { 58 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); 59 VirtioBusState *mmio_virtio_bus = &mmio->bus; 60 BusState *mmio_bus = &mmio_virtio_bus->parent_obj; 61 62 if (QTAILQ_EMPTY(&mmio_bus->children)) { 63 continue; 64 } 65 separator = g_strrstr(mmio_bus->name, "."); 66 if (!separator) { 67 continue; 68 } 69 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { 70 continue; 71 } 72 73 uint32_t irq = mms->virtio_irq_base + index; 74 hwaddr base = VIRTIO_MMIO_BASE + index * 512; 75 hwaddr size = 512; 76 77 Aml *dev = aml_device("VR%02u", (unsigned)index); 78 aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005"))); 79 aml_append(dev, aml_name_decl("_UID", aml_int(index))); 80 aml_append(dev, aml_name_decl("_CCA", aml_int(1))); 81 82 Aml *crs = aml_resource_template(); 83 aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE)); 84 aml_append(crs, 85 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH, 86 AML_EXCLUSIVE, &irq, 1)); 87 aml_append(dev, aml_name_decl("_CRS", crs)); 88 aml_append(scope, dev); 89 } 90 } 91 } 92 93 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) 94 { 95 if (machine_usb(MACHINE(mms))) { 96 xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); 97 } 98 } 99 100 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) 101 { 102 if (mms->pcie != ON_OFF_AUTO_ON) { 103 return; 104 } 105 106 acpi_dsdt_add_gpex(scope, &mms->gpex); 107 } 108 109 static void 110 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, 111 MicrovmMachineState *mms) 112 { 113 X86MachineState *x86ms = X86_MACHINE(mms); 114 Aml *dsdt, *sb_scope, *scope, *pkg; 115 bool ambiguous; 116 Object *isabus; 117 118 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 119 assert(isabus); 120 assert(!ambiguous); 121 122 dsdt = init_aml_allocator(); 123 124 /* Reserve space for header */ 125 acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader)); 126 127 sb_scope = aml_scope("_SB"); 128 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); 129 isa_build_aml(ISA_BUS(isabus), sb_scope); 130 build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev, 131 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); 132 acpi_dsdt_add_power_button(sb_scope); 133 acpi_dsdt_add_virtio(sb_scope, mms); 134 acpi_dsdt_add_xhci(sb_scope, mms); 135 acpi_dsdt_add_pci(sb_scope, mms); 136 aml_append(dsdt, sb_scope); 137 138 /* ACPI 5.0: Table 7-209 System State Package */ 139 scope = aml_scope("\\"); 140 pkg = aml_package(4); 141 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 142 aml_append(pkg, aml_int(0)); /* ignored */ 143 aml_append(pkg, aml_int(0)); /* reserved */ 144 aml_append(pkg, aml_int(0)); /* reserved */ 145 aml_append(scope, aml_name_decl("_S5", pkg)); 146 aml_append(dsdt, scope); 147 148 /* copy AML table into ACPI tables blob and patch header there */ 149 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 150 build_header(linker, table_data, 151 (void *)(table_data->data + table_data->len - dsdt->buf->len), 152 "DSDT", dsdt->buf->len, 2, x86ms->oem_id, x86ms->oem_table_id); 153 free_aml_allocator(); 154 } 155 156 static void acpi_build_microvm(AcpiBuildTables *tables, 157 MicrovmMachineState *mms) 158 { 159 MachineState *machine = MACHINE(mms); 160 X86MachineState *x86ms = X86_MACHINE(mms); 161 GArray *table_offsets; 162 GArray *tables_blob = tables->table_data; 163 unsigned dsdt, xsdt; 164 AcpiFadtData pmfadt = { 165 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 166 .rev = 5, 167 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 168 (1 << ACPI_FADT_F_RESET_REG_SUP)), 169 170 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 171 .sleep_ctl = { 172 .space_id = AML_AS_SYSTEM_MEMORY, 173 .bit_width = 8, 174 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 175 }, 176 .sleep_sts = { 177 .space_id = AML_AS_SYSTEM_MEMORY, 178 .bit_width = 8, 179 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 180 }, 181 182 /* ACPI 5.0: 4.8.3.6 Reset Register */ 183 .reset_reg = { 184 .space_id = AML_AS_SYSTEM_MEMORY, 185 .bit_width = 8, 186 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 187 }, 188 .reset_val = ACPI_GED_RESET_VALUE, 189 }; 190 191 table_offsets = g_array_new(false, true /* clear */, 192 sizeof(uint32_t)); 193 bios_linker_loader_alloc(tables->linker, 194 ACPI_BUILD_TABLE_FILE, tables_blob, 195 64 /* Ensure FACS is aligned */, 196 false /* high memory */); 197 198 dsdt = tables_blob->len; 199 build_dsdt_microvm(tables_blob, tables->linker, mms); 200 201 pmfadt.dsdt_tbl_offset = &dsdt; 202 pmfadt.xdsdt_tbl_offset = &dsdt; 203 acpi_add_table(table_offsets, tables_blob); 204 build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id, 205 x86ms->oem_table_id); 206 207 acpi_add_table(table_offsets, tables_blob); 208 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 209 ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id, 210 x86ms->oem_table_id); 211 212 xsdt = tables_blob->len; 213 build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id, 214 x86ms->oem_table_id); 215 216 /* RSDP is in FSEG memory, so allocate it separately */ 217 { 218 AcpiRsdpData rsdp_data = { 219 /* ACPI 2.0: 5.2.4.3 RSDP Structure */ 220 .revision = 2, /* xsdt needs v2 */ 221 .oem_id = x86ms->oem_id, 222 .xsdt_tbl_offset = &xsdt, 223 .rsdt_tbl_offset = NULL, 224 }; 225 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 226 } 227 228 /* Cleanup memory that's no longer used. */ 229 g_array_free(table_offsets, true); 230 } 231 232 static void acpi_build_no_update(void *build_opaque) 233 { 234 /* nothing, microvm tables don't change at runtime */ 235 } 236 237 void acpi_setup_microvm(MicrovmMachineState *mms) 238 { 239 X86MachineState *x86ms = X86_MACHINE(mms); 240 AcpiBuildTables tables; 241 242 assert(x86ms->fw_cfg); 243 244 if (!x86_machine_is_acpi_enabled(x86ms)) { 245 return; 246 } 247 248 acpi_build_tables_init(&tables); 249 acpi_build_microvm(&tables, mms); 250 251 /* Now expose it all to Guest */ 252 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data, 253 ACPI_BUILD_TABLE_FILE); 254 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob, 255 ACPI_BUILD_LOADER_FILE); 256 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp, 257 ACPI_BUILD_RSDP_FILE); 258 259 acpi_build_tables_cleanup(&tables, false); 260 } 261