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/* Support for generating ACPI tables and passing them to Guests
*
* Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
* Copyright (C) 2006 Fabrice Bellard
* Copyright (C) 2013 Red Hat Inc
*
* Author: Michael S. Tsirkin <mst@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qapi/error.h"
#include "exec/memory.h"
#include "hw/acpi/acpi.h"
#include "hw/acpi/aml-build.h"
#include "hw/acpi/bios-linker-loader.h"
#include "hw/acpi/generic_event_device.h"
#include "hw/acpi/utils.h"
#include "hw/boards.h"
#include "hw/i386/fw_cfg.h"
#include "hw/i386/microvm.h"
#include "hw/virtio/virtio-mmio.h"
#include "acpi-common.h"
#include "acpi-microvm.h"
static void acpi_dsdt_add_virtio(Aml *scope,
MicrovmMachineState *mms)
{
gchar *separator;
long int index;
BusState *bus;
BusChild *kid;
bus = sysbus_get_default();
QTAILQ_FOREACH(kid, &bus->children, sibling) {
DeviceState *dev = kid->child;
Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
if (obj) {
VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
VirtioBusState *mmio_virtio_bus = &mmio->bus;
BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
if (QTAILQ_EMPTY(&mmio_bus->children)) {
continue;
}
separator = g_strrstr(mmio_bus->name, ".");
if (!separator) {
continue;
}
if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
continue;
}
uint32_t irq = mms->virtio_irq_base + index;
hwaddr base = VIRTIO_MMIO_BASE + index * 512;
hwaddr size = 512;
Aml *dev = aml_device("VR%02u", (unsigned)index);
aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
aml_append(dev, aml_name_decl("_UID", aml_int(index)));
aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
Aml *crs = aml_resource_template();
aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
aml_append(crs,
aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
AML_EXCLUSIVE, &irq, 1));
aml_append(dev, aml_name_decl("_CRS", crs));
aml_append(scope, dev);
}
}
}
static void
build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
MicrovmMachineState *mms)
{
X86MachineState *x86ms = X86_MACHINE(mms);
Aml *dsdt, *sb_scope, *scope, *pkg;
bool ambiguous;
Object *isabus;
isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
assert(isabus);
assert(!ambiguous);
dsdt = init_aml_allocator();
/* Reserve space for header */
acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader));
sb_scope = aml_scope("_SB");
fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
isa_build_aml(ISA_BUS(isabus), sb_scope);
build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
acpi_dsdt_add_power_button(sb_scope);
acpi_dsdt_add_virtio(sb_scope, mms);
aml_append(dsdt, sb_scope);
/* ACPI 5.0: Table 7-209 System State Package */
scope = aml_scope("\\");
pkg = aml_package(4);
aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
aml_append(pkg, aml_int(0)); /* ignored */
aml_append(pkg, aml_int(0)); /* reserved */
aml_append(pkg, aml_int(0)); /* reserved */
aml_append(scope, aml_name_decl("_S5", pkg));
aml_append(dsdt, scope);
/* copy AML table into ACPI tables blob and patch header there */
g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
build_header(linker, table_data,
(void *)(table_data->data + table_data->len - dsdt->buf->len),
"DSDT", dsdt->buf->len, 2, NULL, NULL);
free_aml_allocator();
}
static void acpi_build_microvm(AcpiBuildTables *tables,
MicrovmMachineState *mms)
{
MachineState *machine = MACHINE(mms);
X86MachineState *x86ms = X86_MACHINE(mms);
GArray *table_offsets;
GArray *tables_blob = tables->table_data;
unsigned dsdt, xsdt;
AcpiFadtData pmfadt = {
/* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
.rev = 5,
.flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
(1 << ACPI_FADT_F_RESET_REG_SUP)),
/* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
.sleep_ctl = {
.space_id = AML_AS_SYSTEM_MEMORY,
.bit_width = 8,
.address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
},
.sleep_sts = {
.space_id = AML_AS_SYSTEM_MEMORY,
.bit_width = 8,
.address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
},
/* ACPI 5.0: 4.8.3.6 Reset Register */
.reset_reg = {
.space_id = AML_AS_SYSTEM_MEMORY,
.bit_width = 8,
.address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
},
.reset_val = ACPI_GED_RESET_VALUE,
};
table_offsets = g_array_new(false, true /* clear */,
sizeof(uint32_t));
bios_linker_loader_alloc(tables->linker,
ACPI_BUILD_TABLE_FILE, tables_blob,
64 /* Ensure FACS is aligned */,
false /* high memory */);
dsdt = tables_blob->len;
build_dsdt_microvm(tables_blob, tables->linker, mms);
pmfadt.dsdt_tbl_offset = &dsdt;
pmfadt.xdsdt_tbl_offset = &dsdt;
acpi_add_table(table_offsets, tables_blob);
build_fadt(tables_blob, tables->linker, &pmfadt, NULL, NULL);
acpi_add_table(table_offsets, tables_blob);
acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
ACPI_DEVICE_IF(x86ms->acpi_dev), false);
xsdt = tables_blob->len;
build_xsdt(tables_blob, tables->linker, table_offsets, NULL, NULL);
/* RSDP is in FSEG memory, so allocate it separately */
{
AcpiRsdpData rsdp_data = {
/* ACPI 2.0: 5.2.4.3 RSDP Structure */
.revision = 2, /* xsdt needs v2 */
.oem_id = ACPI_BUILD_APPNAME6,
.xsdt_tbl_offset = &xsdt,
.rsdt_tbl_offset = NULL,
};
build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
}
/* Cleanup memory that's no longer used. */
g_array_free(table_offsets, true);
}
static void acpi_build_no_update(void *build_opaque)
{
/* nothing, microvm tables don't change at runtime */
}
void acpi_setup_microvm(MicrovmMachineState *mms)
{
X86MachineState *x86ms = X86_MACHINE(mms);
AcpiBuildTables tables;
assert(x86ms->fw_cfg);
if (!x86_machine_is_acpi_enabled(x86ms)) {
return;
}
acpi_build_tables_init(&tables);
acpi_build_microvm(&tables, mms);
/* Now expose it all to Guest */
acpi_add_rom_blob(acpi_build_no_update, NULL,
tables.table_data,
ACPI_BUILD_TABLE_FILE,
ACPI_BUILD_TABLE_MAX_SIZE);
acpi_add_rom_blob(acpi_build_no_update, NULL,
tables.linker->cmd_blob,
"etc/table-loader", 0);
acpi_add_rom_blob(acpi_build_no_update, NULL,
tables.rsdp,
ACPI_BUILD_RSDP_FILE, 0);
acpi_build_tables_cleanup(&tables, false);
}
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