Merge remote-tracking branch 'remotes/alistair/tags/pull-riscv-to-apply-20220121...
[qemu.git] / 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
43 static 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
92 static 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
99 static 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
108 static void
109 build_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
154 static 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
230 static void acpi_build_no_update(void *build_opaque)
231 {
232 /* nothing, microvm tables don't change at runtime */
233 }
234
235 void 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 }