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-mmio.h"
  41 #include "hw/input/i8042.h"
  42
  43 #include "acpi-common.h"
  44 #include "acpi-microvm.h"
  45
  46 #include CONFIG_DEVICES
  47
  48 static void acpi_dsdt_add_virtio(Aml *scope,
  49                                  MicrovmMachineState *mms)
  50 {
  51     gchar *separator;
  52     long int index;
  53     BusState *bus;
  54     BusChild *kid;
  55
  56     bus = sysbus_get_default();
  57     QTAILQ_FOREACH(kid, &bus->children, sibling) {
  58         Object *obj = object_dynamic_cast(OBJECT(kid->child),
  59                                           TYPE_VIRTIO_MMIO);
  60
  61         if (obj) {
  62             VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
  63             VirtioBusState *mmio_virtio_bus = &mmio->bus;
  64             BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
  65
  66             if (QTAILQ_EMPTY(&mmio_bus->children)) {
  67                 continue;
  68             }
  69             separator = g_strrstr(mmio_bus->name, ".");
  70             if (!separator) {
  71                 continue;
  72             }
  73             if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
  74                 continue;
  75             }
  76
  77             uint32_t irq = mms->virtio_irq_base + index;
  78             hwaddr base = VIRTIO_MMIO_BASE + index * 512;
  79             hwaddr size = 512;
  80
  81             Aml *dev = aml_device("VR%02u", (unsigned)index);
  82             aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
  83             aml_append(dev, aml_name_decl("_UID", aml_int(index)));
  84             aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
  85
  86             Aml *crs = aml_resource_template();
  87             aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
  88             aml_append(crs,
  89                        aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
  90                                      AML_EXCLUSIVE, &irq, 1));
  91             aml_append(dev, aml_name_decl("_CRS", crs));
  92             aml_append(scope, dev);
  93         }
  94     }
  95 }
  96
  97 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms)
  98 {
  99     if (machine_usb(MACHINE(mms))) {
 100         xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ);
 101     }
 102 }
 103
 104 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms)
 105 {
 106     if (mms->pcie != ON_OFF_AUTO_ON) {
 107         return;
 108     }
 109
 110     acpi_dsdt_add_gpex(scope, &mms->gpex);
 111 }
 112
 113 static void
 114 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
 115                    MicrovmMachineState *mms)
 116 {
 117     X86MachineState *x86ms = X86_MACHINE(mms);
 118     Aml *dsdt, *sb_scope, *scope, *pkg;
 119     bool ambiguous;
 120     Object *isabus;
 121     AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id,
 122                         .oem_table_id = x86ms->oem_table_id };
 123
 124     isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
 125     assert(isabus);
 126     assert(!ambiguous);
 127
 128     acpi_table_begin(&table, table_data);
 129     dsdt = init_aml_allocator();
 130
 131     sb_scope = aml_scope("_SB");
 132     fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
 133     qbus_build_aml(BUS(isabus), sb_scope);
 134     build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
 135                   GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
 136     acpi_dsdt_add_power_button(sb_scope);
 137     acpi_dsdt_add_virtio(sb_scope, mms);
 138     acpi_dsdt_add_xhci(sb_scope, mms);
 139     acpi_dsdt_add_pci(sb_scope, mms);
 140     aml_append(dsdt, sb_scope);
 141
 142     /* ACPI 5.0: Table 7-209 System State Package */
 143     scope = aml_scope("\\");
 144     pkg = aml_package(4);
 145     aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
 146     aml_append(pkg, aml_int(0)); /* ignored */
 147     aml_append(pkg, aml_int(0)); /* reserved */
 148     aml_append(pkg, aml_int(0)); /* reserved */
 149     aml_append(scope, aml_name_decl("_S5", pkg));
 150     aml_append(dsdt, scope);
 151
 152     /* copy AML bytecode into ACPI tables blob */
 153     g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
 154
 155     acpi_table_end(linker, &table);
 156     free_aml_allocator();
 157 }
 158
 159 static void acpi_build_microvm(AcpiBuildTables *tables,
 160                                MicrovmMachineState *mms)
 161 {
 162     MachineState *machine = MACHINE(mms);
 163     X86MachineState *x86ms = X86_MACHINE(mms);
 164     GArray *table_offsets;
 165     GArray *tables_blob = tables->table_data;
 166     unsigned dsdt, xsdt;
 167     AcpiFadtData pmfadt = {
 168         /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
 169         .rev = 5,
 170         .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
 171                   (1 << ACPI_FADT_F_RESET_REG_SUP)),
 172
 173         /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
 174         .sleep_ctl = {
 175             .space_id = AML_AS_SYSTEM_MEMORY,
 176             .bit_width = 8,
 177             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
 178         },
 179         .sleep_sts = {
 180             .space_id = AML_AS_SYSTEM_MEMORY,
 181             .bit_width = 8,
 182             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
 183         },
 184
 185         /* ACPI 5.0: 4.8.3.6 Reset Register */
 186         .reset_reg = {
 187             .space_id = AML_AS_SYSTEM_MEMORY,
 188             .bit_width = 8,
 189             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
 190         },
 191         .reset_val = ACPI_GED_RESET_VALUE,
 192         /*
 193          * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture
 194          * Flags, bit offset 1 - 8042.
 195          */
 196         .iapc_boot_arch = iapc_boot_arch_8042(),
 197     };
 198
 199     table_offsets = g_array_new(false, true /* clear */,
 200                                         sizeof(uint32_t));
 201     bios_linker_loader_alloc(tables->linker,
 202                              ACPI_BUILD_TABLE_FILE, tables_blob,
 203                              64 /* Ensure FACS is aligned */,
 204                              false /* high memory */);
 205
 206     dsdt = tables_blob->len;
 207     build_dsdt_microvm(tables_blob, tables->linker, mms);
 208
 209     pmfadt.dsdt_tbl_offset = &dsdt;
 210     pmfadt.xdsdt_tbl_offset = &dsdt;
 211     acpi_add_table(table_offsets, tables_blob);
 212     build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id,
 213                x86ms->oem_table_id);
 214
 215     acpi_add_table(table_offsets, tables_blob);
 216     acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
 217                     x86ms->oem_id, 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 }