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/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, NULL, NULL);
 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, NULL, NULL);
 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));
 209
 210     xsdt = tables_blob->len;
 211     build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL);
 212
 213     /* RSDP is in FSEG memory, so allocate it separately */
 214     {
 215         AcpiRsdpData rsdp_data = {
 216             /* ACPI 2.0: 5.2.4.3 RSDP Structure */
 217             .revision = 2, /* xsdt needs v2 */
 218             .oem_id = ACPI_BUILD_APPNAME6,
 219             .xsdt_tbl_offset = &xsdt,
 220             .rsdt_tbl_offset = NULL,
 221         };
 222         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
 223     }
 224
 225     /* Cleanup memory that's no longer used. */
 226     g_array_free(table_offsets, true);
 227 }
 228
 229 static void acpi_build_no_update(void *build_opaque)
 230 {
 231     /* nothing, microvm tables don't change at runtime */
 232 }
 233
 234 void acpi_setup_microvm(MicrovmMachineState *mms)
 235 {
 236     X86MachineState *x86ms = X86_MACHINE(mms);
 237     AcpiBuildTables tables;
 238
 239     assert(x86ms->fw_cfg);
 240
 241     if (!x86_machine_is_acpi_enabled(x86ms)) {
 242         return;
 243     }
 244
 245     acpi_build_tables_init(&tables);
 246     acpi_build_microvm(&tables, mms);
 247
 248     /* Now expose it all to Guest */
 249     acpi_add_rom_blob(acpi_build_no_update, NULL,
 250                       tables.table_data,
 251                       ACPI_BUILD_TABLE_FILE,
 252                       ACPI_BUILD_TABLE_MAX_SIZE);
 253     acpi_add_rom_blob(acpi_build_no_update, NULL,
 254                       tables.linker->cmd_blob,
 255                       "etc/table-loader", 0);
 256     acpi_add_rom_blob(acpi_build_no_update, NULL,
 257                       tables.rsdp,
 258                       ACPI_BUILD_RSDP_FILE, 0);
 259
 260     acpi_build_tables_cleanup(&tables, false);
 261 }