LXR qemu/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
  44static 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
  93static 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
 100static 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
 109static void
 110build_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, x86ms->oem_id, x86ms->oem_table_id);
 153    free_aml_allocator();
 154}
 155
 156static 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, x86ms->oem_id,
 205               x86ms->oem_table_id);
 206
 207    acpi_add_table(table_offsets, tables_blob);
 208    acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
 209                    ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id,
 210                    x86ms->oem_table_id);
 211
 212    xsdt = tables_blob->len;
 213    build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id,
 214               x86ms->oem_table_id);
 215
 216    /* RSDP is in FSEG memory, so allocate it separately */
 217    {
 218        AcpiRsdpData rsdp_data = {
 219            /* ACPI 2.0: 5.2.4.3 RSDP Structure */
 220            .revision = 2, /* xsdt needs v2 */
 221            .oem_id = x86ms->oem_id,
 222            .xsdt_tbl_offset = &xsdt,
 223            .rsdt_tbl_offset = NULL,
 224        };
 225        build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
 226    }
 227
 228    /* Cleanup memory that's no longer used. */
 229    g_array_free(table_offsets, true);
 230}
 231
 232static void acpi_build_no_update(void *build_opaque)
 233{
 234    /* nothing, microvm tables don't change at runtime */
 235}
 236
 237void acpi_setup_microvm(MicrovmMachineState *mms)
 238{
 239    X86MachineState *x86ms = X86_MACHINE(mms);
 240    AcpiBuildTables tables;
 241
 242    assert(x86ms->fw_cfg);
 243
 244    if (!x86_machine_is_acpi_enabled(x86ms)) {
 245        return;
 246    }
 247
 248    acpi_build_tables_init(&tables);
 249    acpi_build_microvm(&tables, mms);
 250
 251    /* Now expose it all to Guest */
 252    acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data,
 253                      ACPI_BUILD_TABLE_FILE);
 254    acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob,
 255                      ACPI_BUILD_LOADER_FILE);
 256    acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp,
 257                      ACPI_BUILD_RSDP_FILE);
 258
 259    acpi_build_tables_cleanup(&tables, false);
 260}
 261