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/acpi/erst.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 #include "hw/input/i8042.h"
  41
  42 #include "acpi-common.h"
  43 #include "acpi-microvm.h"
  44
  45 #include CONFIG_DEVICES
  46
  47 static void acpi_dsdt_add_virtio(Aml *scope,
  48                                  MicrovmMachineState *mms)
  49 {
  50     gchar *separator;
  51     long int index;
  52     BusState *bus;
  53     BusChild *kid;
  54
  55     bus = sysbus_get_default();
  56     QTAILQ_FOREACH(kid, &bus->children, sibling) {
  57         DeviceState *dev = kid->child;
  58         Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
  59
  60         if (obj) {
  61             VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
  62             VirtioBusState *mmio_virtio_bus = &mmio->bus;
  63             BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
  64
  65             if (QTAILQ_EMPTY(&mmio_bus->children)) {
  66                 continue;
  67             }
  68             separator = g_strrstr(mmio_bus->name, ".");
  69             if (!separator) {
  70                 continue;
  71             }
  72             if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
  73                 continue;
  74             }
  75
  76             uint32_t irq = mms->virtio_irq_base + index;
  77             hwaddr base = VIRTIO_MMIO_BASE + index * 512;
  78             hwaddr size = 512;
  79
  80             Aml *dev = aml_device("VR%02u", (unsigned)index);
  81             aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
  82             aml_append(dev, aml_name_decl("_UID", aml_int(index)));
  83             aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
  84
  85             Aml *crs = aml_resource_template();
  86             aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
  87             aml_append(crs,
  88                        aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
  89                                      AML_EXCLUSIVE, &irq, 1));
  90             aml_append(dev, aml_name_decl("_CRS", crs));
  91             aml_append(scope, dev);
  92         }
  93     }
  94 }
  95
  96 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms)
  97 {
  98     if (machine_usb(MACHINE(mms))) {
  99         xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ);
 100     }
 101 }
 102
 103 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms)
 104 {
 105     if (mms->pcie != ON_OFF_AUTO_ON) {
 106         return;
 107     }
 108
 109     acpi_dsdt_add_gpex(scope, &mms->gpex);
 110 }
 111
 112 static void
 113 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
 114                    MicrovmMachineState *mms)
 115 {
 116     X86MachineState *x86ms = X86_MACHINE(mms);
 117     Aml *dsdt, *sb_scope, *scope, *pkg;
 118     bool ambiguous;
 119     Object *isabus;
 120     AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id,
 121                         .oem_table_id = x86ms->oem_table_id };
 122
 123     isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
 124     assert(isabus);
 125     assert(!ambiguous);
 126
 127     acpi_table_begin(&table, table_data);
 128     dsdt = init_aml_allocator();
 129
 130     sb_scope = aml_scope("_SB");
 131     fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
 132     isa_build_aml(ISA_BUS(isabus), sb_scope);
 133     build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
 134                   GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
 135     acpi_dsdt_add_power_button(sb_scope);
 136     acpi_dsdt_add_virtio(sb_scope, mms);
 137     acpi_dsdt_add_xhci(sb_scope, mms);
 138     acpi_dsdt_add_pci(sb_scope, mms);
 139     aml_append(dsdt, sb_scope);
 140
 141     /* ACPI 5.0: Table 7-209 System State Package */
 142     scope = aml_scope("\\");
 143     pkg = aml_package(4);
 144     aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
 145     aml_append(pkg, aml_int(0)); /* ignored */
 146     aml_append(pkg, aml_int(0)); /* reserved */
 147     aml_append(pkg, aml_int(0)); /* reserved */
 148     aml_append(scope, aml_name_decl("_S5", pkg));
 149     aml_append(dsdt, scope);
 150
 151     /* copy AML bytecode into ACPI tables blob */
 152     g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
 153
 154     acpi_table_end(linker, &table);
 155     free_aml_allocator();
 156 }
 157
 158 static void acpi_build_microvm(AcpiBuildTables *tables,
 159                                MicrovmMachineState *mms)
 160 {
 161     MachineState *machine = MACHINE(mms);
 162     X86MachineState *x86ms = X86_MACHINE(mms);
 163     GArray *table_offsets;
 164     GArray *tables_blob = tables->table_data;
 165     unsigned dsdt, xsdt;
 166     AcpiFadtData pmfadt = {
 167         /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
 168         .rev = 5,
 169         .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
 170                   (1 << ACPI_FADT_F_RESET_REG_SUP)),
 171
 172         /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
 173         .sleep_ctl = {
 174             .space_id = AML_AS_SYSTEM_MEMORY,
 175             .bit_width = 8,
 176             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
 177         },
 178         .sleep_sts = {
 179             .space_id = AML_AS_SYSTEM_MEMORY,
 180             .bit_width = 8,
 181             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
 182         },
 183
 184         /* ACPI 5.0: 4.8.3.6 Reset Register */
 185         .reset_reg = {
 186             .space_id = AML_AS_SYSTEM_MEMORY,
 187             .bit_width = 8,
 188             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
 189         },
 190         .reset_val = ACPI_GED_RESET_VALUE,
 191         /*
 192          * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture
 193          * Flags, bit offset 1 - 8042.
 194          */
 195         .iapc_boot_arch = iapc_boot_arch_8042(),
 196     };
 197
 198     table_offsets = g_array_new(false, true /* clear */,
 199                                         sizeof(uint32_t));
 200     bios_linker_loader_alloc(tables->linker,
 201                              ACPI_BUILD_TABLE_FILE, tables_blob,
 202                              64 /* Ensure FACS is aligned */,
 203                              false /* high memory */);
 204
 205     dsdt = tables_blob->len;
 206     build_dsdt_microvm(tables_blob, tables->linker, mms);
 207
 208     pmfadt.dsdt_tbl_offset = &dsdt;
 209     pmfadt.xdsdt_tbl_offset = &dsdt;
 210     acpi_add_table(table_offsets, tables_blob);
 211     build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id,
 212                x86ms->oem_table_id);
 213
 214     acpi_add_table(table_offsets, tables_blob);
 215     acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
 216                     ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id,
 217                     x86ms->oem_table_id);
 218
 219 #ifdef CONFIG_ACPI_ERST
 220     {
 221         Object *erst_dev;
 222         erst_dev = find_erst_dev();
 223         if (erst_dev) {
 224             acpi_add_table(table_offsets, tables_blob);
 225             build_erst(tables_blob, tables->linker, erst_dev,
 226                        x86ms->oem_id, x86ms->oem_table_id);
 227         }
 228     }
 229 #endif
 230
 231     xsdt = tables_blob->len;
 232     build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id,
 233                x86ms->oem_table_id);
 234
 235     /* RSDP is in FSEG memory, so allocate it separately */
 236     {
 237         AcpiRsdpData rsdp_data = {
 238             /* ACPI 2.0: 5.2.4.3 RSDP Structure */
 239             .revision = 2, /* xsdt needs v2 */
 240             .oem_id = x86ms->oem_id,
 241             .xsdt_tbl_offset = &xsdt,
 242             .rsdt_tbl_offset = NULL,
 243         };
 244         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
 245     }
 246
 247     /* Cleanup memory that's no longer used. */
 248     g_array_free(table_offsets, true);
 249 }
 250
 251 static void acpi_build_no_update(void *build_opaque)
 252 {
 253     /* nothing, microvm tables don't change at runtime */
 254 }
 255
 256 void acpi_setup_microvm(MicrovmMachineState *mms)
 257 {
 258     X86MachineState *x86ms = X86_MACHINE(mms);
 259     AcpiBuildTables tables;
 260
 261     assert(x86ms->fw_cfg);
 262
 263     if (!x86_machine_is_acpi_enabled(x86ms)) {
 264         return;
 265     }
 266
 267     acpi_build_tables_init(&tables);
 268     acpi_build_microvm(&tables, mms);
 269
 270     /* Now expose it all to Guest */
 271     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data,
 272                       ACPI_BUILD_TABLE_FILE);
 273     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob,
 274                       ACPI_BUILD_LOADER_FILE);
 275     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp,
 276                       ACPI_BUILD_RSDP_FILE);
 277
 278     acpi_build_tables_cleanup(&tables, false);
 279 }