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/acpi_aml_interface.h"
30 #include "hw/acpi/aml-build.h"
31 #include "hw/acpi/bios-linker-loader.h"
32 #include "hw/acpi/generic_event_device.h"
33 #include "hw/acpi/utils.h"
34 #include "hw/acpi/erst.h"
35 #include "hw/i386/fw_cfg.h"
36 #include "hw/i386/microvm.h"
37 #include "hw/pci/pci.h"
38 #include "hw/pci/pcie_host.h"
39 #include "hw/usb/xhci.h"
40 #include "hw/virtio/virtio-acpi.h"
41 #include "hw/virtio/virtio-mmio.h"
42 #include "hw/input/i8042.h"
43
44 #include "acpi-common.h"
45 #include "acpi-microvm.h"
46
47 #include CONFIG_DEVICES
48
acpi_dsdt_add_virtio(Aml * scope,MicrovmMachineState * mms)49 static void acpi_dsdt_add_virtio(Aml *scope,
50 MicrovmMachineState *mms)
51 {
52 gchar *separator;
53 long int index;
54 BusState *bus;
55 BusChild *kid;
56
57 bus = sysbus_get_default();
58 QTAILQ_FOREACH(kid, &bus->children, sibling) {
59 Object *obj = object_dynamic_cast(OBJECT(kid->child),
60 TYPE_VIRTIO_MMIO);
61
62 if (obj) {
63 VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
64 VirtioBusState *mmio_virtio_bus = &mmio->bus;
65 BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
66
67 if (QTAILQ_EMPTY(&mmio_bus->children)) {
68 continue;
69 }
70 separator = g_strrstr(mmio_bus->name, ".");
71 if (!separator) {
72 continue;
73 }
74 if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
75 continue;
76 }
77
78 uint32_t irq = mms->virtio_irq_base + index;
79 hwaddr base = VIRTIO_MMIO_BASE + index * 512;
80 hwaddr size = 512;
81 virtio_acpi_dsdt_add(scope, base, size, irq, index, 1);
82 }
83 }
84 }
85
acpi_dsdt_add_xhci(Aml * scope,MicrovmMachineState * mms)86 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms)
87 {
88 if (machine_usb(MACHINE(mms))) {
89 xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ);
90 }
91 }
92
acpi_dsdt_add_pci(Aml * scope,MicrovmMachineState * mms)93 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms)
94 {
95 if (mms->pcie != ON_OFF_AUTO_ON) {
96 return;
97 }
98
99 acpi_dsdt_add_gpex(scope, &mms->gpex);
100 }
101
102 static void
build_dsdt_microvm(GArray * table_data,BIOSLinker * linker,MicrovmMachineState * mms)103 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
104 MicrovmMachineState *mms)
105 {
106 X86MachineState *x86ms = X86_MACHINE(mms);
107 Aml *dsdt, *sb_scope, *scope, *pkg;
108 bool ambiguous;
109 Object *isabus;
110 AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id,
111 .oem_table_id = x86ms->oem_table_id };
112
113 isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
114 assert(isabus);
115 assert(!ambiguous);
116
117 acpi_table_begin(&table, table_data);
118 dsdt = init_aml_allocator();
119
120 sb_scope = aml_scope("_SB");
121 fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
122 qbus_build_aml(BUS(isabus), sb_scope);
123 build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
124 GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
125 acpi_dsdt_add_power_button(sb_scope);
126 acpi_dsdt_add_virtio(sb_scope, mms);
127 acpi_dsdt_add_xhci(sb_scope, mms);
128 acpi_dsdt_add_pci(sb_scope, mms);
129 aml_append(dsdt, sb_scope);
130
131 /* ACPI 5.0: Table 7-209 System State Package */
132 scope = aml_scope("\\");
133 pkg = aml_package(4);
134 aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
135 aml_append(pkg, aml_int(0)); /* ignored */
136 aml_append(pkg, aml_int(0)); /* reserved */
137 aml_append(pkg, aml_int(0)); /* reserved */
138 aml_append(scope, aml_name_decl("_S5", pkg));
139 aml_append(dsdt, scope);
140
141 /* copy AML bytecode into ACPI tables blob */
142 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
143
144 acpi_table_end(linker, &table);
145 free_aml_allocator();
146 }
147
acpi_build_microvm(AcpiBuildTables * tables,MicrovmMachineState * mms)148 static void acpi_build_microvm(AcpiBuildTables *tables,
149 MicrovmMachineState *mms)
150 {
151 MachineState *machine = MACHINE(mms);
152 X86MachineState *x86ms = X86_MACHINE(mms);
153 GArray *table_offsets;
154 GArray *tables_blob = tables->table_data;
155 unsigned dsdt, xsdt;
156 AcpiFadtData pmfadt = {
157 /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
158 .rev = 5,
159 .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
160 (1 << ACPI_FADT_F_RESET_REG_SUP)),
161
162 /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
163 .sleep_ctl = {
164 .space_id = AML_AS_SYSTEM_MEMORY,
165 .bit_width = 8,
166 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
167 },
168 .sleep_sts = {
169 .space_id = AML_AS_SYSTEM_MEMORY,
170 .bit_width = 8,
171 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
172 },
173
174 /* ACPI 5.0: 4.8.3.6 Reset Register */
175 .reset_reg = {
176 .space_id = AML_AS_SYSTEM_MEMORY,
177 .bit_width = 8,
178 .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
179 },
180 .reset_val = ACPI_GED_RESET_VALUE,
181 /*
182 * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture
183 * Flags, bit offset 1 - 8042.
184 */
185 .iapc_boot_arch = iapc_boot_arch_8042(),
186 };
187
188 table_offsets = g_array_new(false, true /* clear */,
189 sizeof(uint32_t));
190 bios_linker_loader_alloc(tables->linker,
191 ACPI_BUILD_TABLE_FILE, tables_blob,
192 64 /* Ensure FACS is aligned */,
193 false /* high memory */);
194
195 dsdt = tables_blob->len;
196 build_dsdt_microvm(tables_blob, tables->linker, mms);
197
198 pmfadt.dsdt_tbl_offset = &dsdt;
199 pmfadt.xdsdt_tbl_offset = &dsdt;
200 acpi_add_table(table_offsets, tables_blob);
201 build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id,
202 x86ms->oem_table_id);
203
204 acpi_add_table(table_offsets, tables_blob);
205 acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
206 x86ms->oem_id, x86ms->oem_table_id);
207
208 #ifdef CONFIG_ACPI_ERST
209 {
210 Object *erst_dev;
211 erst_dev = find_erst_dev();
212 if (erst_dev) {
213 acpi_add_table(table_offsets, tables_blob);
214 build_erst(tables_blob, tables->linker, erst_dev,
215 x86ms->oem_id, x86ms->oem_table_id);
216 }
217 }
218 #endif
219
220 xsdt = tables_blob->len;
221 build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id,
222 x86ms->oem_table_id);
223
224 /* RSDP is in FSEG memory, so allocate it separately */
225 {
226 AcpiRsdpData rsdp_data = {
227 /* ACPI 2.0: 5.2.4.3 RSDP Structure */
228 .revision = 2, /* xsdt needs v2 */
229 .oem_id = x86ms->oem_id,
230 .xsdt_tbl_offset = &xsdt,
231 .rsdt_tbl_offset = NULL,
232 };
233 build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
234 }
235
236 /* Cleanup memory that's no longer used. */
237 g_array_free(table_offsets, true);
238 }
239
acpi_build_no_update(void * build_opaque)240 static void acpi_build_no_update(void *build_opaque)
241 {
242 /* nothing, microvm tables don't change at runtime */
243 }
244
acpi_setup_microvm(MicrovmMachineState * mms)245 void acpi_setup_microvm(MicrovmMachineState *mms)
246 {
247 X86MachineState *x86ms = X86_MACHINE(mms);
248 AcpiBuildTables tables;
249
250 assert(x86ms->fw_cfg);
251
252 if (!x86_machine_is_acpi_enabled(x86ms)) {
253 return;
254 }
255
256 acpi_build_tables_init(&tables);
257 acpi_build_microvm(&tables, mms);
258
259 /* Now expose it all to Guest */
260 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data,
261 ACPI_BUILD_TABLE_FILE);
262 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob,
263 ACPI_BUILD_LOADER_FILE);
264 acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp,
265 ACPI_BUILD_RSDP_FILE);
266
267 acpi_build_tables_cleanup(&tables, false);
268 }
269