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/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
  43static 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
  92static 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
  99static 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
 108static void
 109build_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
 154static 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
 230static void acpi_build_no_update(void *build_opaque)
 231{
 232    /* nothing, microvm tables don't change at runtime */
 233}
 234
 235void 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}
 259