1 /* Support for generating ACPI tables and passing them to Guests
3 * Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
4 * Copyright (C) 2006 Fabrice Bellard
5 * Copyright (C) 2013 Red Hat Inc
7 * Author: Michael S. Tsirkin <mst@redhat.com>
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.
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.
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/>.
23 #include "qemu/osdep.h"
24 #include "qemu/cutils.h"
25 #include "qapi/error.h"
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"
38 #include "acpi-common.h"
39 #include "acpi-microvm.h"
41 static void acpi_dsdt_add_virtio(Aml
*scope
,
42 MicrovmMachineState
*mms
)
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
);
55 VirtIOMMIOProxy
*mmio
= VIRTIO_MMIO(obj
);
56 VirtioBusState
*mmio_virtio_bus
= &mmio
->bus
;
57 BusState
*mmio_bus
= &mmio_virtio_bus
->parent_obj
;
59 if (QTAILQ_EMPTY(&mmio_bus
->children
)) {
62 separator
= g_strrstr(mmio_bus
->name
, ".");
66 if (qemu_strtol(separator
+ 1, NULL
, 10, &index
) != 0) {
70 uint32_t irq
= mms
->virtio_irq_base
+ index
;
71 hwaddr base
= VIRTIO_MMIO_BASE
+ index
* 512;
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)));
79 Aml
*crs
= aml_resource_template();
80 aml_append(crs
, aml_memory32_fixed(base
, size
, AML_READ_WRITE
));
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
);
91 build_dsdt_microvm(GArray
*table_data
, BIOSLinker
*linker
,
92 MicrovmMachineState
*mms
)
94 X86MachineState
*x86ms
= X86_MACHINE(mms
);
95 Aml
*dsdt
, *sb_scope
, *scope
, *pkg
;
99 isabus
= object_resolve_path_type("", TYPE_ISA_BUS
, &ambiguous
);
103 dsdt
= init_aml_allocator();
105 /* Reserve space for header */
106 acpi_data_push(dsdt
->buf
, sizeof(AcpiTableHeader
));
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
);
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
);
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();
135 static void acpi_build_microvm(AcpiBuildTables
*tables
,
136 MicrovmMachineState
*mms
)
138 MachineState
*machine
= MACHINE(mms
);
139 X86MachineState
*x86ms
= X86_MACHINE(mms
);
140 GArray
*table_offsets
;
141 GArray
*tables_blob
= tables
->table_data
;
143 AcpiFadtData pmfadt
= {
144 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
146 .flags
= ((1 << ACPI_FADT_F_HW_REDUCED_ACPI
) |
147 (1 << ACPI_FADT_F_RESET_REG_SUP
)),
149 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
151 .space_id
= AML_AS_SYSTEM_MEMORY
,
153 .address
= GED_MMIO_BASE_REGS
+ ACPI_GED_REG_SLEEP_CTL
,
156 .space_id
= AML_AS_SYSTEM_MEMORY
,
158 .address
= GED_MMIO_BASE_REGS
+ ACPI_GED_REG_SLEEP_STS
,
161 /* ACPI 5.0: 4.8.3.6 Reset Register */
163 .space_id
= AML_AS_SYSTEM_MEMORY
,
165 .address
= GED_MMIO_BASE_REGS
+ ACPI_GED_REG_RESET
,
167 .reset_val
= ACPI_GED_RESET_VALUE
,
170 table_offsets
= g_array_new(false, true /* clear */,
172 bios_linker_loader_alloc(tables
->linker
,
173 ACPI_BUILD_TABLE_FILE
, tables_blob
,
174 64 /* Ensure FACS is aligned */,
175 false /* high memory */);
177 dsdt
= tables_blob
->len
;
178 build_dsdt_microvm(tables_blob
, tables
->linker
, mms
);
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
);
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);
189 xsdt
= tables_blob
->len
;
190 build_xsdt(tables_blob
, tables
->linker
, table_offsets
, NULL
, NULL
);
192 /* RSDP is in FSEG memory, so allocate it separately */
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
,
201 build_rsdp(tables
->rsdp
, tables
->linker
, &rsdp_data
);
204 /* Cleanup memory that's no longer used. */
205 g_array_free(table_offsets
, true);
208 static void acpi_build_no_update(void *build_opaque
)
210 /* nothing, microvm tables don't change at runtime */
213 void acpi_setup_microvm(MicrovmMachineState
*mms
)
215 X86MachineState
*x86ms
= X86_MACHINE(mms
);
216 AcpiBuildTables tables
;
218 assert(x86ms
->fw_cfg
);
220 if (!x86_machine_is_acpi_enabled(x86ms
)) {
224 acpi_build_tables_init(&tables
);
225 acpi_build_microvm(&tables
, mms
);
227 /* Now expose it all to Guest */
228 acpi_add_rom_blob(acpi_build_no_update
, NULL
,
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
,
237 ACPI_BUILD_RSDP_FILE
, 0);
239 acpi_build_tables_cleanup(&tables
, false);