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/i386/fw_cfg.h"
  34 #include "hw/i386/microvm.h"
  35 #include "hw/pci/pci.h"
  36 #include "hw/pci/pcie_host.h"
  37 #include "hw/usb/xhci.h"
  38 #include "hw/virtio/virtio-mmio.h"
  39
  40 #include "acpi-common.h"
  41 #include "acpi-microvm.h"
  42
  43 static void acpi_dsdt_add_virtio(Aml *scope,
  44                                  MicrovmMachineState *mms)
  45 {
  46     gchar *separator;
  47     long int index;
  48     BusState *bus;
  49     BusChild *kid;
  50
  51     bus = sysbus_get_default();
  52     QTAILQ_FOREACH(kid, &bus->children, sibling) {
  53         DeviceState *dev = kid->child;
  54         Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
  55
  56         if (obj) {
  57             VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
  58             VirtioBusState *mmio_virtio_bus = &mmio->bus;
  59             BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
  60
  61             if (QTAILQ_EMPTY(&mmio_bus->children)) {
  62                 continue;
  63             }
  64             separator = g_strrstr(mmio_bus->name, ".");
  65             if (!separator) {
  66                 continue;
  67             }
  68             if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
  69                 continue;
  70             }
  71
  72             uint32_t irq = mms->virtio_irq_base + index;
  73             hwaddr base = VIRTIO_MMIO_BASE + index * 512;
  74             hwaddr size = 512;
  75
  76             Aml *dev = aml_device("VR%02u", (unsigned)index);
  77             aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
  78             aml_append(dev, aml_name_decl("_UID", aml_int(index)));
  79             aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
  80
  81             Aml *crs = aml_resource_template();
  82             aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
  83             aml_append(crs,
  84                        aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
  85                                      AML_EXCLUSIVE, &irq, 1));
  86             aml_append(dev, aml_name_decl("_CRS", crs));
  87             aml_append(scope, dev);
  88         }
  89     }
  90 }
  91
  92 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms)
  93 {
  94     if (machine_usb(MACHINE(mms))) {
  95         xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ);
  96     }
  97 }
  98
  99 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms)
 100 {
 101     if (mms->pcie != ON_OFF_AUTO_ON) {
 102         return;
 103     }
 104
 105     acpi_dsdt_add_gpex(scope, &mms->gpex);
 106 }
 107
 108 static void
 109 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
 110                    MicrovmMachineState *mms)
 111 {
 112     X86MachineState *x86ms = X86_MACHINE(mms);
 113     Aml *dsdt, *sb_scope, *scope, *pkg;
 114     bool ambiguous;
 115     Object *isabus;
 116     AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id,
 117                         .oem_table_id = x86ms->oem_table_id };
 118
 119     isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
 120     assert(isabus);
 121     assert(!ambiguous);
 122
 123     acpi_table_begin(&table, table_data);
 124     dsdt = init_aml_allocator();
 125
 126     sb_scope = aml_scope("_SB");
 127     fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
 128     isa_build_aml(ISA_BUS(isabus), sb_scope);
 129     build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
 130                   GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
 131     acpi_dsdt_add_power_button(sb_scope);
 132     acpi_dsdt_add_virtio(sb_scope, mms);
 133     acpi_dsdt_add_xhci(sb_scope, mms);
 134     acpi_dsdt_add_pci(sb_scope, mms);
 135     aml_append(dsdt, sb_scope);
 136
 137     /* ACPI 5.0: Table 7-209 System State Package */
 138     scope = aml_scope("\\");
 139     pkg = aml_package(4);
 140     aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
 141     aml_append(pkg, aml_int(0)); /* ignored */
 142     aml_append(pkg, aml_int(0)); /* reserved */
 143     aml_append(pkg, aml_int(0)); /* reserved */
 144     aml_append(scope, aml_name_decl("_S5", pkg));
 145     aml_append(dsdt, scope);
 146
 147     /* copy AML bytecode into ACPI tables blob */
 148     g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
 149
 150     acpi_table_end(linker, &table);
 151     free_aml_allocator();
 152 }
 153
 154 static void acpi_build_microvm(AcpiBuildTables *tables,
 155                                MicrovmMachineState *mms)
 156 {
 157     MachineState *machine = MACHINE(mms);
 158     X86MachineState *x86ms = X86_MACHINE(mms);
 159     GArray *table_offsets;
 160     GArray *tables_blob = tables->table_data;
 161     unsigned dsdt, xsdt;
 162     AcpiFadtData pmfadt = {
 163         /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
 164         .rev = 5,
 165         .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
 166                   (1 << ACPI_FADT_F_RESET_REG_SUP)),
 167
 168         /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
 169         .sleep_ctl = {
 170             .space_id = AML_AS_SYSTEM_MEMORY,
 171             .bit_width = 8,
 172             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
 173         },
 174         .sleep_sts = {
 175             .space_id = AML_AS_SYSTEM_MEMORY,
 176             .bit_width = 8,
 177             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
 178         },
 179
 180         /* ACPI 5.0: 4.8.3.6 Reset Register */
 181         .reset_reg = {
 182             .space_id = AML_AS_SYSTEM_MEMORY,
 183             .bit_width = 8,
 184             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
 185         },
 186         .reset_val = ACPI_GED_RESET_VALUE,
 187     };
 188
 189     table_offsets = g_array_new(false, true /* clear */,
 190                                         sizeof(uint32_t));
 191     bios_linker_loader_alloc(tables->linker,
 192                              ACPI_BUILD_TABLE_FILE, tables_blob,
 193                              64 /* Ensure FACS is aligned */,
 194                              false /* high memory */);
 195
 196     dsdt = tables_blob->len;
 197     build_dsdt_microvm(tables_blob, tables->linker, mms);
 198
 199     pmfadt.dsdt_tbl_offset = &dsdt;
 200     pmfadt.xdsdt_tbl_offset = &dsdt;
 201     acpi_add_table(table_offsets, tables_blob);
 202     build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id,
 203                x86ms->oem_table_id);
 204
 205     acpi_add_table(table_offsets, tables_blob);
 206     acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
 207                     ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id,
 208                     x86ms->oem_table_id);
 209
 210     xsdt = tables_blob->len;
 211     build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id,
 212                x86ms->oem_table_id);
 213
 214     /* RSDP is in FSEG memory, so allocate it separately */
 215     {
 216         AcpiRsdpData rsdp_data = {
 217             /* ACPI 2.0: 5.2.4.3 RSDP Structure */
 218             .revision = 2, /* xsdt needs v2 */
 219             .oem_id = x86ms->oem_id,
 220             .xsdt_tbl_offset = &xsdt,
 221             .rsdt_tbl_offset = NULL,
 222         };
 223         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
 224     }
 225
 226     /* Cleanup memory that's no longer used. */
 227     g_array_free(table_offsets, true);
 228 }
 229
 230 static void acpi_build_no_update(void *build_opaque)
 231 {
 232     /* nothing, microvm tables don't change at runtime */
 233 }
 234
 235 void acpi_setup_microvm(MicrovmMachineState *mms)
 236 {
 237     X86MachineState *x86ms = X86_MACHINE(mms);
 238     AcpiBuildTables tables;
 239
 240     assert(x86ms->fw_cfg);
 241
 242     if (!x86_machine_is_acpi_enabled(x86ms)) {
 243         return;
 244     }
 245
 246     acpi_build_tables_init(&tables);
 247     acpi_build_microvm(&tables, mms);
 248
 249     /* Now expose it all to Guest */
 250     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data,
 251                       ACPI_BUILD_TABLE_FILE);
 252     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob,
 253                       ACPI_BUILD_LOADER_FILE);
 254     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp,
 255                       ACPI_BUILD_RSDP_FILE);
 256
 257     acpi_build_tables_cleanup(&tables, false);
 258 }