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/virtio/virtio-mmio.h" 37 38 #include "acpi-common.h" 39 #include "acpi-microvm.h" 40 41 static void acpi_dsdt_add_virtio(Aml *scope, 42 MicrovmMachineState *mms) 43 { 44 gchar *separator; 45 long int index; 46 BusState *bus; 47 BusChild *kid; 48 49 bus = sysbus_get_default(); 50 QTAILQ_FOREACH(kid, &bus->children, sibling) { 51 DeviceState *dev = kid->child; 52 Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO); 53 54 if (obj) { 55 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); 56 VirtioBusState *mmio_virtio_bus = &mmio->bus; 57 BusState *mmio_bus = &mmio_virtio_bus->parent_obj; 58 59 if (QTAILQ_EMPTY(&mmio_bus->children)) { 60 continue; 61 } 62 separator = g_strrstr(mmio_bus->name, "."); 63 if (!separator) { 64 continue; 65 } 66 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { 67 continue; 68 } 69 70 uint32_t irq = mms->virtio_irq_base + index; 71 hwaddr base = VIRTIO_MMIO_BASE + index * 512; 72 hwaddr size = 512; 73 74 Aml *dev = aml_device("VR%02u", (unsigned)index); 75 aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005"))); 76 aml_append(dev, aml_name_decl("_UID", aml_int(index))); 77 aml_append(dev, aml_name_decl("_CCA", aml_int(1))); 78 79 Aml *crs = aml_resource_template(); 80 aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE)); 81 aml_append(crs, 82 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH, 83 AML_EXCLUSIVE, &irq, 1)); 84 aml_append(dev, aml_name_decl("_CRS", crs)); 85 aml_append(scope, dev); 86 } 87 } 88 } 89 90 static void 91 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, 92 MicrovmMachineState *mms) 93 { 94 X86MachineState *x86ms = X86_MACHINE(mms); 95 Aml *dsdt, *sb_scope, *scope, *pkg; 96 bool ambiguous; 97 Object *isabus; 98 99 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); 100 assert(isabus); 101 assert(!ambiguous); 102 103 dsdt = init_aml_allocator(); 104 105 /* Reserve space for header */ 106 acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader)); 107 108 sb_scope = aml_scope("_SB"); 109 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); 110 isa_build_aml(ISA_BUS(isabus), sb_scope); 111 build_ged_aml(sb_scope, GED_DEVICE, HOTPLUG_HANDLER(mms->acpi_dev), 112 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); 113 acpi_dsdt_add_power_button(sb_scope); 114 acpi_dsdt_add_virtio(sb_scope, mms); 115 aml_append(dsdt, sb_scope); 116 117 /* ACPI 5.0: Table 7-209 System State Package */ 118 scope = aml_scope("\\"); 119 pkg = aml_package(4); 120 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); 121 aml_append(pkg, aml_int(0)); /* ignored */ 122 aml_append(pkg, aml_int(0)); /* reserved */ 123 aml_append(pkg, aml_int(0)); /* reserved */ 124 aml_append(scope, aml_name_decl("_S5", pkg)); 125 aml_append(dsdt, scope); 126 127 /* copy AML table into ACPI tables blob and patch header there */ 128 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); 129 build_header(linker, table_data, 130 (void *)(table_data->data + table_data->len - dsdt->buf->len), 131 "DSDT", dsdt->buf->len, 2, NULL, NULL); 132 free_aml_allocator(); 133 } 134 135 static void acpi_build_microvm(AcpiBuildTables *tables, 136 MicrovmMachineState *mms) 137 { 138 MachineState *machine = MACHINE(mms); 139 GArray *table_offsets; 140 GArray *tables_blob = tables->table_data; 141 unsigned dsdt, xsdt; 142 AcpiFadtData pmfadt = { 143 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ 144 .rev = 5, 145 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | 146 (1 << ACPI_FADT_F_RESET_REG_SUP)), 147 148 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ 149 .sleep_ctl = { 150 .space_id = AML_AS_SYSTEM_MEMORY, 151 .bit_width = 8, 152 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, 153 }, 154 .sleep_sts = { 155 .space_id = AML_AS_SYSTEM_MEMORY, 156 .bit_width = 8, 157 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, 158 }, 159 160 /* ACPI 5.0: 4.8.3.6 Reset Register */ 161 .reset_reg = { 162 .space_id = AML_AS_SYSTEM_MEMORY, 163 .bit_width = 8, 164 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, 165 }, 166 .reset_val = ACPI_GED_RESET_VALUE, 167 }; 168 169 table_offsets = g_array_new(false, true /* clear */, 170 sizeof(uint32_t)); 171 bios_linker_loader_alloc(tables->linker, 172 ACPI_BUILD_TABLE_FILE, tables_blob, 173 64 /* Ensure FACS is aligned */, 174 false /* high memory */); 175 176 dsdt = tables_blob->len; 177 build_dsdt_microvm(tables_blob, tables->linker, mms); 178 179 pmfadt.dsdt_tbl_offset = &dsdt; 180 pmfadt.xdsdt_tbl_offset = &dsdt; 181 acpi_add_table(table_offsets, tables_blob); 182 build_fadt(tables_blob, tables->linker, &pmfadt, NULL, NULL); 183 184 acpi_add_table(table_offsets, tables_blob); 185 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), 186 mms->acpi_dev, false); 187 188 xsdt = tables_blob->len; 189 build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL); 190 191 /* RSDP is in FSEG memory, so allocate it separately */ 192 { 193 AcpiRsdpData rsdp_data = { 194 /* ACPI 2.0: 5.2.4.3 RSDP Structure */ 195 .revision = 2, /* xsdt needs v2 */ 196 .oem_id = ACPI_BUILD_APPNAME6, 197 .xsdt_tbl_offset = &xsdt, 198 .rsdt_tbl_offset = NULL, 199 }; 200 build_rsdp(tables->rsdp, tables->linker, &rsdp_data); 201 } 202 203 /* Cleanup memory that's no longer used. */ 204 g_array_free(table_offsets, true); 205 } 206 207 static void acpi_build_no_update(void *build_opaque) 208 { 209 /* nothing, microvm tables don't change at runtime */ 210 } 211 212 void acpi_setup_microvm(MicrovmMachineState *mms) 213 { 214 X86MachineState *x86ms = X86_MACHINE(mms); 215 AcpiBuildTables tables; 216 217 assert(x86ms->fw_cfg); 218 219 if (!x86_machine_is_acpi_enabled(x86ms)) { 220 return; 221 } 222 223 acpi_build_tables_init(&tables); 224 acpi_build_microvm(&tables, mms); 225 226 /* Now expose it all to Guest */ 227 acpi_add_rom_blob(acpi_build_no_update, NULL, 228 tables.table_data, 229 ACPI_BUILD_TABLE_FILE, 230 ACPI_BUILD_TABLE_MAX_SIZE); 231 acpi_add_rom_blob(acpi_build_no_update, NULL, 232 tables.linker->cmd_blob, 233 "etc/table-loader", 0); 234 acpi_add_rom_blob(acpi_build_no_update, NULL, 235 tables.rsdp, 236 ACPI_BUILD_RSDP_FILE, 0); 237 238 acpi_build_tables_cleanup(&tables, false); 239 } 240