| 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 "system/memory.h" |
| 28 | #include "hw/acpi/acpi.h" |
| 29 | #include "hw/acpi/acpi_aml_interface.h" |
| 30 | #include "hw/acpi/aml-build.h" |
| 31 | #include "hw/acpi/bios-linker-loader.h" |
| 32 | #include "hw/acpi/generic_event_device.h" |
| 33 | #include "hw/acpi/utils.h" |
| 34 | #include "hw/acpi/erst.h" |
| 35 | #include "hw/i386/fw_cfg.h" |
| 36 | #include "hw/i386/microvm.h" |
| 37 | #include "hw/pci/pci.h" |
| 38 | #include "hw/pci/pcie_host.h" |
| 39 | #include "hw/usb/xhci.h" |
| 40 | #include "hw/virtio/virtio-acpi.h" |
| 41 | #include "hw/virtio/virtio-mmio.h" |
| 42 | #include "hw/input/i8042.h" |
| 43 | |
| 44 | #include "acpi-common.h" |
| 45 | #include "acpi-microvm.h" |
| 46 | |
| 47 | #include CONFIG_DEVICES |
| 48 | |
| 49 | static void acpi_dsdt_add_virtio(Aml *scope, |
| 50 | MicrovmMachineState *mms) |
| 51 | { |
| 52 | gchar *separator; |
| 53 | long int index; |
| 54 | BusState *bus; |
| 55 | BusChild *kid; |
| 56 | |
| 57 | bus = sysbus_get_default(); |
| 58 | QTAILQ_FOREACH(kid, &bus->children, sibling) { |
| 59 | Object *obj = object_dynamic_cast(OBJECT(kid->child), |
| 60 | TYPE_VIRTIO_MMIO); |
| 61 | |
| 62 | if (obj) { |
| 63 | VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj); |
| 64 | VirtioBusState *mmio_virtio_bus = &mmio->bus; |
| 65 | BusState *mmio_bus = &mmio_virtio_bus->parent_obj; |
| 66 | |
| 67 | if (QTAILQ_EMPTY(&mmio_bus->children)) { |
| 68 | continue; |
| 69 | } |
| 70 | separator = g_strrstr(mmio_bus->name, "."); |
| 71 | if (!separator) { |
| 72 | continue; |
| 73 | } |
| 74 | if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) { |
| 75 | continue; |
| 76 | } |
| 77 | |
| 78 | uint32_t irq = mms->virtio_irq_base + index; |
| 79 | hwaddr base = VIRTIO_MMIO_BASE + index * 512; |
| 80 | hwaddr size = 512; |
| 81 | virtio_acpi_dsdt_add(scope, base, size, irq, index, 1); |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) |
| 87 | { |
| 88 | if (machine_usb(MACHINE(mms))) { |
| 89 | xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) |
| 94 | { |
| 95 | if (mms->pcie != ON_OFF_AUTO_ON) { |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | acpi_dsdt_add_gpex(scope, &mms->gpex); |
| 100 | } |
| 101 | |
| 102 | static void |
| 103 | build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, |
| 104 | MicrovmMachineState *mms) |
| 105 | { |
| 106 | X86MachineState *x86ms = X86_MACHINE(mms); |
| 107 | Aml *dsdt, *sb_scope, *scope, *pkg; |
| 108 | bool ambiguous; |
| 109 | Object *isabus; |
| 110 | AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id, |
| 111 | .oem_table_id = x86ms->oem_table_id }; |
| 112 | |
| 113 | isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous); |
| 114 | assert(isabus); |
| 115 | assert(!ambiguous); |
| 116 | |
| 117 | acpi_table_begin(&table, table_data); |
| 118 | dsdt = init_aml_allocator(); |
| 119 | |
| 120 | sb_scope = aml_scope("_SB"); |
| 121 | fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg); |
| 122 | qbus_build_aml(BUS(isabus), sb_scope); |
| 123 | build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev, |
| 124 | GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); |
| 125 | acpi_dsdt_add_power_button(sb_scope); |
| 126 | acpi_dsdt_add_virtio(sb_scope, mms); |
| 127 | acpi_dsdt_add_xhci(sb_scope, mms); |
| 128 | acpi_dsdt_add_pci(sb_scope, mms); |
| 129 | aml_append(dsdt, sb_scope); |
| 130 | |
| 131 | /* ACPI 5.0: Table 7-209 System State Package */ |
| 132 | scope = aml_scope("\\"); |
| 133 | pkg = aml_package(4); |
| 134 | aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5)); |
| 135 | aml_append(pkg, aml_int(0)); /* ignored */ |
| 136 | aml_append(pkg, aml_int(0)); /* reserved */ |
| 137 | aml_append(pkg, aml_int(0)); /* reserved */ |
| 138 | aml_append(scope, aml_name_decl("_S5", pkg)); |
| 139 | aml_append(dsdt, scope); |
| 140 | |
| 141 | /* copy AML bytecode into ACPI tables blob */ |
| 142 | g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len); |
| 143 | |
| 144 | acpi_table_end(linker, &table); |
| 145 | free_aml_allocator(); |
| 146 | } |
| 147 | |
| 148 | static void acpi_build_microvm(AcpiBuildTables *tables, |
| 149 | MicrovmMachineState *mms) |
| 150 | { |
| 151 | MachineState *machine = MACHINE(mms); |
| 152 | X86MachineState *x86ms = X86_MACHINE(mms); |
| 153 | GArray *table_offsets; |
| 154 | GArray *tables_blob = tables->table_data; |
| 155 | unsigned dsdt, xsdt; |
| 156 | AcpiFadtData pmfadt = { |
| 157 | /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */ |
| 158 | .rev = 5, |
| 159 | .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) | |
| 160 | (1 << ACPI_FADT_F_RESET_REG_SUP)), |
| 161 | |
| 162 | /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */ |
| 163 | .sleep_ctl = { |
| 164 | .space_id = AML_AS_SYSTEM_MEMORY, |
| 165 | .bit_width = 8, |
| 166 | .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL, |
| 167 | }, |
| 168 | .sleep_sts = { |
| 169 | .space_id = AML_AS_SYSTEM_MEMORY, |
| 170 | .bit_width = 8, |
| 171 | .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS, |
| 172 | }, |
| 173 | |
| 174 | /* ACPI 5.0: 4.8.3.6 Reset Register */ |
| 175 | .reset_reg = { |
| 176 | .space_id = AML_AS_SYSTEM_MEMORY, |
| 177 | .bit_width = 8, |
| 178 | .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET, |
| 179 | }, |
| 180 | .reset_val = ACPI_GED_RESET_VALUE, |
| 181 | /* |
| 182 | * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture |
| 183 | * Flags, bit offset 1 - 8042. |
| 184 | */ |
| 185 | .iapc_boot_arch = iapc_boot_arch_8042(), |
| 186 | }; |
| 187 | |
| 188 | table_offsets = g_array_new(false, true /* clear */, |
| 189 | sizeof(uint32_t)); |
| 190 | bios_linker_loader_alloc(tables->linker, |
| 191 | ACPI_BUILD_TABLE_FILE, tables_blob, |
| 192 | 64 /* Ensure FACS is aligned */, |
| 193 | false /* high memory */); |
| 194 | |
| 195 | dsdt = tables_blob->len; |
| 196 | build_dsdt_microvm(tables_blob, tables->linker, mms); |
| 197 | |
| 198 | pmfadt.dsdt_tbl_offset = &dsdt; |
| 199 | pmfadt.xdsdt_tbl_offset = &dsdt; |
| 200 | acpi_add_table(table_offsets, tables_blob); |
| 201 | build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id, |
| 202 | x86ms->oem_table_id); |
| 203 | |
| 204 | acpi_add_table(table_offsets, tables_blob); |
| 205 | acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine), |
| 206 | x86ms->oem_id, x86ms->oem_table_id); |
| 207 | |
| 208 | #ifdef CONFIG_ACPI_ERST |
| 209 | { |
| 210 | Object *erst_dev; |
| 211 | erst_dev = find_erst_dev(); |
| 212 | if (erst_dev) { |
| 213 | acpi_add_table(table_offsets, tables_blob); |
| 214 | build_erst(tables_blob, tables->linker, erst_dev, |
| 215 | x86ms->oem_id, x86ms->oem_table_id); |
| 216 | } |
| 217 | } |
| 218 | #endif |
| 219 | |
| 220 | xsdt = tables_blob->len; |
| 221 | build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id, |
| 222 | x86ms->oem_table_id); |
| 223 | |
| 224 | /* RSDP is in FSEG memory, so allocate it separately */ |
| 225 | { |
| 226 | AcpiRsdpData rsdp_data = { |
| 227 | /* ACPI 2.0: 5.2.4.3 RSDP Structure */ |
| 228 | .revision = 2, /* xsdt needs v2 */ |
| 229 | .oem_id = x86ms->oem_id, |
| 230 | .xsdt_tbl_offset = &xsdt, |
| 231 | .rsdt_tbl_offset = NULL, |
| 232 | }; |
| 233 | build_rsdp(tables->rsdp, tables->linker, &rsdp_data); |
| 234 | } |
| 235 | |
| 236 | /* Cleanup memory that's no longer used. */ |
| 237 | g_array_free(table_offsets, true); |
| 238 | } |
| 239 | |
| 240 | static void acpi_build_no_update(void *build_opaque) |
| 241 | { |
| 242 | /* nothing, microvm tables don't change at runtime */ |
| 243 | } |
| 244 | |
| 245 | void acpi_setup_microvm(MicrovmMachineState *mms) |
| 246 | { |
| 247 | X86MachineState *x86ms = X86_MACHINE(mms); |
| 248 | AcpiBuildTables tables; |
| 249 | |
| 250 | assert(x86ms->fw_cfg); |
| 251 | |
| 252 | if (!x86_machine_is_acpi_enabled(x86ms)) { |
| 253 | return; |
| 254 | } |
| 255 | |
| 256 | acpi_build_tables_init(&tables); |
| 257 | acpi_build_microvm(&tables, mms); |
| 258 | |
| 259 | /* Now expose it all to Guest */ |
| 260 | acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data, |
| 261 | ACPI_BUILD_TABLE_FILE); |
| 262 | acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob, |
| 263 | ACPI_BUILD_LOADER_FILE); |
| 264 | acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp, |
| 265 | ACPI_BUILD_RSDP_FILE); |
| 266 | |
| 267 | acpi_build_tables_cleanup(&tables, false); |
| 268 | } |