hw/i386/acpi-microvm.c

   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/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 }