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/virtio/virtio-mmio.h"
  37
  38 #include "acpi-common.h"
  39 #include "acpi-microvm.h"
  40
  41 static void acpi_dsdt_add_virtio(Aml *scope,
  42                                  MicrovmMachineState *mms)
  43 {
  44     gchar *separator;
  45     long int index;
  46     BusState *bus;
  47     BusChild *kid;
  48
  49     bus = sysbus_get_default();
  50     QTAILQ_FOREACH(kid, &bus->children, sibling) {
  51         DeviceState *dev = kid->child;
  52         Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
  53
  54         if (obj) {
  55             VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
  56             VirtioBusState *mmio_virtio_bus = &mmio->bus;
  57             BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
  58
  59             if (QTAILQ_EMPTY(&mmio_bus->children)) {
  60                 continue;
  61             }
  62             separator = g_strrstr(mmio_bus->name, ".");
  63             if (!separator) {
  64                 continue;
  65             }
  66             if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
  67                 continue;
  68             }
  69
  70             uint32_t irq = mms->virtio_irq_base + index;
  71             hwaddr base = VIRTIO_MMIO_BASE + index * 512;
  72             hwaddr size = 512;
  73
  74             Aml *dev = aml_device("VR%02u", (unsigned)index);
  75             aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
  76             aml_append(dev, aml_name_decl("_UID", aml_int(index)));
  77             aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
  78
  79             Aml *crs = aml_resource_template();
  80             aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
  81             aml_append(crs,
  82                        aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
  83                                      AML_EXCLUSIVE, &irq, 1));
  84             aml_append(dev, aml_name_decl("_CRS", crs));
  85             aml_append(scope, dev);
  86         }
  87     }
  88 }
  89
  90 static void
  91 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
  92                    MicrovmMachineState *mms)
  93 {
  94     X86MachineState *x86ms = X86_MACHINE(mms);
  95     Aml *dsdt, *sb_scope, *scope, *pkg;
  96     bool ambiguous;
  97     Object *isabus;
  98
  99     isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
 100     assert(isabus);
 101     assert(!ambiguous);
 102
 103     dsdt = init_aml_allocator();
 104
 105     /* Reserve space for header */
 106     acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader));
 107
 108     sb_scope = aml_scope("_SB");
 109     fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
 110     isa_build_aml(ISA_BUS(isabus), sb_scope);
 111     build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
 112                   GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
 113     acpi_dsdt_add_power_button(sb_scope);
 114     acpi_dsdt_add_virtio(sb_scope, mms);
 115     aml_append(dsdt, sb_scope);
 116
 117     /* ACPI 5.0: Table 7-209 System State Package */
 118     scope = aml_scope("\\");
 119     pkg = aml_package(4);
 120     aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
 121     aml_append(pkg, aml_int(0)); /* ignored */
 122     aml_append(pkg, aml_int(0)); /* reserved */
 123     aml_append(pkg, aml_int(0)); /* reserved */
 124     aml_append(scope, aml_name_decl("_S5", pkg));
 125     aml_append(dsdt, scope);
 126
 127     /* copy AML table into ACPI tables blob and patch header there */
 128     g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
 129     build_header(linker, table_data,
 130         (void *)(table_data->data + table_data->len - dsdt->buf->len),
 131         "DSDT", dsdt->buf->len, 2, NULL, NULL);
 132     free_aml_allocator();
 133 }
 134
 135 static void acpi_build_microvm(AcpiBuildTables *tables,
 136                                MicrovmMachineState *mms)
 137 {
 138     MachineState *machine = MACHINE(mms);
 139     X86MachineState *x86ms = X86_MACHINE(mms);
 140     GArray *table_offsets;
 141     GArray *tables_blob = tables->table_data;
 142     unsigned dsdt, xsdt;
 143     AcpiFadtData pmfadt = {
 144         /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
 145         .rev = 5,
 146         .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
 147                   (1 << ACPI_FADT_F_RESET_REG_SUP)),
 148
 149         /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
 150         .sleep_ctl = {
 151             .space_id = AML_AS_SYSTEM_MEMORY,
 152             .bit_width = 8,
 153             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
 154         },
 155         .sleep_sts = {
 156             .space_id = AML_AS_SYSTEM_MEMORY,
 157             .bit_width = 8,
 158             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
 159         },
 160
 161         /* ACPI 5.0: 4.8.3.6 Reset Register */
 162         .reset_reg = {
 163             .space_id = AML_AS_SYSTEM_MEMORY,
 164             .bit_width = 8,
 165             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
 166         },
 167         .reset_val = ACPI_GED_RESET_VALUE,
 168     };
 169
 170     table_offsets = g_array_new(false, true /* clear */,
 171                                         sizeof(uint32_t));
 172     bios_linker_loader_alloc(tables->linker,
 173                              ACPI_BUILD_TABLE_FILE, tables_blob,
 174                              64 /* Ensure FACS is aligned */,
 175                              false /* high memory */);
 176
 177     dsdt = tables_blob->len;
 178     build_dsdt_microvm(tables_blob, tables->linker, mms);
 179
 180     pmfadt.dsdt_tbl_offset = &dsdt;
 181     pmfadt.xdsdt_tbl_offset = &dsdt;
 182     acpi_add_table(table_offsets, tables_blob);
 183     build_fadt(tables_blob, tables->linker, &pmfadt, NULL, NULL);
 184
 185     acpi_add_table(table_offsets, tables_blob);
 186     acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
 187                     ACPI_DEVICE_IF(x86ms->acpi_dev), false);
 188
 189     xsdt = tables_blob->len;
 190     build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL);
 191
 192     /* RSDP is in FSEG memory, so allocate it separately */
 193     {
 194         AcpiRsdpData rsdp_data = {
 195             /* ACPI 2.0: 5.2.4.3 RSDP Structure */
 196             .revision = 2, /* xsdt needs v2 */
 197             .oem_id = ACPI_BUILD_APPNAME6,
 198             .xsdt_tbl_offset = &xsdt,
 199             .rsdt_tbl_offset = NULL,
 200         };
 201         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
 202     }
 203
 204     /* Cleanup memory that's no longer used. */
 205     g_array_free(table_offsets, true);
 206 }
 207
 208 static void acpi_build_no_update(void *build_opaque)
 209 {
 210     /* nothing, microvm tables don't change at runtime */
 211 }
 212
 213 void acpi_setup_microvm(MicrovmMachineState *mms)
 214 {
 215     X86MachineState *x86ms = X86_MACHINE(mms);
 216     AcpiBuildTables tables;
 217
 218     assert(x86ms->fw_cfg);
 219
 220     if (!x86_machine_is_acpi_enabled(x86ms)) {
 221         return;
 222     }
 223
 224     acpi_build_tables_init(&tables);
 225     acpi_build_microvm(&tables, mms);
 226
 227     /* Now expose it all to Guest */
 228     acpi_add_rom_blob(acpi_build_no_update, NULL,
 229                       tables.table_data,
 230                       ACPI_BUILD_TABLE_FILE,
 231                       ACPI_BUILD_TABLE_MAX_SIZE);
 232     acpi_add_rom_blob(acpi_build_no_update, NULL,
 233                       tables.linker->cmd_blob,
 234                       "etc/table-loader", 0);
 235     acpi_add_rom_blob(acpi_build_no_update, NULL,
 236                       tables.rsdp,
 237                       ACPI_BUILD_RSDP_FILE, 0);
 238
 239     acpi_build_tables_cleanup(&tables, false);
 240 }