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; 116 117 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 118 assert(isabus); 119 assert(!ambiguous); 120 121 dsdt = init_aml_allocator(); 122 123 /* Reserve space for header */ 124 acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader)); 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 table into ACPI tables blob and patch header there */ 148 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 149 build_header(linker, table_data, 150 (void *)(table_data->data + table_data->len - dsdt->buf->len), 151 "DSDT", dsdt->buf->len, 2, x86ms->oem_id, x86ms->oem_table_id); 152 free_aml_allocator(); 153 } 154 155 static void acpi_build_microvm(AcpiBuildTables *tables, 156 MicrovmMachineState *mms) 157 { 158 MachineState *machine = MACHINE(mms); 159 X86MachineState *x86ms = X86_MACHINE(mms); 160 GArray *table_offsets; 161 GArray *tables_blob = tables->table_data; 162 unsigned dsdt, xsdt; 163 AcpiFadtData pmfadt = { 164 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 165 .rev = 5, 166 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 167 (1 << ACPI_FADT_F_RESET_REG_SUP)), 168 169 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 170 .sleep_ctl = { 171 .space_id = AML_AS_SYSTEM_MEMORY, 172 .bit_width = 8, 173 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 174 }, 175 .sleep_sts = { 176 .space_id = AML_AS_SYSTEM_MEMORY, 177 .bit_width = 8, 178 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 179 }, 180 181 /* ACPI 5.0: 4.8.3.6 Reset Register */ 182 .reset_reg = { 183 .space_id = AML_AS_SYSTEM_MEMORY, 184 .bit_width = 8, 185 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 186 }, 187 .reset_val = ACPI_GED_RESET_VALUE, 188 }; 189 190 table_offsets = g_array_new(false, true /* clear */, 191 sizeof(uint32_t)); 192 bios_linker_loader_alloc(tables->linker, 193 ACPI_BUILD_TABLE_FILE, tables_blob, 194 64 /* Ensure FACS is aligned */, 195 false /* high memory */); 196 197 dsdt = tables_blob->len; 198 build_dsdt_microvm(tables_blob, tables->linker, mms); 199 200 pmfadt.dsdt_tbl_offset = &dsdt; 201 pmfadt.xdsdt_tbl_offset = &dsdt; 202 acpi_add_table(table_offsets, tables_blob); 203 build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id, 204 x86ms->oem_table_id); 205 206 acpi_add_table(table_offsets, tables_blob); 207 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 208 ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id, 209 x86ms->oem_table_id); 210 211 xsdt = tables_blob->len; 212 build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id, 213 x86ms->oem_table_id); 214 215 /* RSDP is in FSEG memory, so allocate it separately */ 216 { 217 AcpiRsdpData rsdp_data = { 218 /* ACPI 2.0: 5.2.4.3 RSDP Structure */ 219 .revision = 2, /* xsdt needs v2 */ 220 .oem_id = x86ms->oem_id, 221 .xsdt_tbl_offset = &xsdt, 222 .rsdt_tbl_offset = NULL, 223 }; 224 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 225 } 226 227 /* Cleanup memory that's no longer used. */ 228 g_array_free(table_offsets, true); 229 } 230 231 static void acpi_build_no_update(void *build_opaque) 232 { 233 /* nothing, microvm tables don't change at runtime */ 234 } 235 236 void acpi_setup_microvm(MicrovmMachineState *mms) 237 { 238 X86MachineState *x86ms = X86_MACHINE(mms); 239 AcpiBuildTables tables; 240 241 assert(x86ms->fw_cfg); 242 243 if (!x86_machine_is_acpi_enabled(x86ms)) { 244 return; 245 } 246 247 acpi_build_tables_init(&tables); 248 acpi_build_microvm(&tables, mms); 249 250 /* Now expose it all to Guest */ 251 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data, 252 ACPI_BUILD_TABLE_FILE); 253 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob, 254 ACPI_BUILD_LOADER_FILE); 255 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp, 256 ACPI_BUILD_RSDP_FILE); 257 258 acpi_build_tables_cleanup(&tables, false); 259 } 260