xref: /openbmc/qemu/hw/i386/acpi-microvm.c (revision 6538692e)
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/acpi/erst.h"
34 #include "hw/i386/fw_cfg.h"
35 #include "hw/i386/microvm.h"
36 #include "hw/pci/pci.h"
37 #include "hw/pci/pcie_host.h"
38 #include "hw/usb/xhci.h"
39 #include "hw/virtio/virtio-mmio.h"
40 
41 #include "acpi-common.h"
42 #include "acpi-microvm.h"
43 
44 #include CONFIG_DEVICES
45 
46 static void acpi_dsdt_add_virtio(Aml *scope,
47                                  MicrovmMachineState *mms)
48 {
49     gchar *separator;
50     long int index;
51     BusState *bus;
52     BusChild *kid;
53 
54     bus = sysbus_get_default();
55     QTAILQ_FOREACH(kid, &bus->children, sibling) {
56         DeviceState *dev = kid->child;
57         Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MMIO);
58 
59         if (obj) {
60             VirtIOMMIOProxy *mmio = VIRTIO_MMIO(obj);
61             VirtioBusState *mmio_virtio_bus = &mmio->bus;
62             BusState *mmio_bus = &mmio_virtio_bus->parent_obj;
63 
64             if (QTAILQ_EMPTY(&mmio_bus->children)) {
65                 continue;
66             }
67             separator = g_strrstr(mmio_bus->name, ".");
68             if (!separator) {
69                 continue;
70             }
71             if (qemu_strtol(separator + 1, NULL, 10, &index) != 0) {
72                 continue;
73             }
74 
75             uint32_t irq = mms->virtio_irq_base + index;
76             hwaddr base = VIRTIO_MMIO_BASE + index * 512;
77             hwaddr size = 512;
78 
79             Aml *dev = aml_device("VR%02u", (unsigned)index);
80             aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
81             aml_append(dev, aml_name_decl("_UID", aml_int(index)));
82             aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
83 
84             Aml *crs = aml_resource_template();
85             aml_append(crs, aml_memory32_fixed(base, size, AML_READ_WRITE));
86             aml_append(crs,
87                        aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
88                                      AML_EXCLUSIVE, &irq, 1));
89             aml_append(dev, aml_name_decl("_CRS", crs));
90             aml_append(scope, dev);
91         }
92     }
93 }
94 
95 static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms)
96 {
97     if (machine_usb(MACHINE(mms))) {
98         xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ);
99     }
100 }
101 
102 static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms)
103 {
104     if (mms->pcie != ON_OFF_AUTO_ON) {
105         return;
106     }
107 
108     acpi_dsdt_add_gpex(scope, &mms->gpex);
109 }
110 
111 static void
112 build_dsdt_microvm(GArray *table_data, BIOSLinker *linker,
113                    MicrovmMachineState *mms)
114 {
115     X86MachineState *x86ms = X86_MACHINE(mms);
116     Aml *dsdt, *sb_scope, *scope, *pkg;
117     bool ambiguous;
118     Object *isabus;
119     AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = x86ms->oem_id,
120                         .oem_table_id = x86ms->oem_table_id };
121 
122     isabus = object_resolve_path_type("", TYPE_ISA_BUS, &ambiguous);
123     assert(isabus);
124     assert(!ambiguous);
125 
126     acpi_table_begin(&table, table_data);
127     dsdt = init_aml_allocator();
128 
129     sb_scope = aml_scope("_SB");
130     fw_cfg_add_acpi_dsdt(sb_scope, x86ms->fw_cfg);
131     isa_build_aml(ISA_BUS(isabus), sb_scope);
132     build_ged_aml(sb_scope, GED_DEVICE, x86ms->acpi_dev,
133                   GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE);
134     acpi_dsdt_add_power_button(sb_scope);
135     acpi_dsdt_add_virtio(sb_scope, mms);
136     acpi_dsdt_add_xhci(sb_scope, mms);
137     acpi_dsdt_add_pci(sb_scope, mms);
138     aml_append(dsdt, sb_scope);
139 
140     /* ACPI 5.0: Table 7-209 System State Package */
141     scope = aml_scope("\\");
142     pkg = aml_package(4);
143     aml_append(pkg, aml_int(ACPI_GED_SLP_TYP_S5));
144     aml_append(pkg, aml_int(0)); /* ignored */
145     aml_append(pkg, aml_int(0)); /* reserved */
146     aml_append(pkg, aml_int(0)); /* reserved */
147     aml_append(scope, aml_name_decl("_S5", pkg));
148     aml_append(dsdt, scope);
149 
150     /* copy AML bytecode into ACPI tables blob */
151     g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
152 
153     acpi_table_end(linker, &table);
154     free_aml_allocator();
155 }
156 
157 static void acpi_build_microvm(AcpiBuildTables *tables,
158                                MicrovmMachineState *mms)
159 {
160     MachineState *machine = MACHINE(mms);
161     X86MachineState *x86ms = X86_MACHINE(mms);
162     GArray *table_offsets;
163     GArray *tables_blob = tables->table_data;
164     unsigned dsdt, xsdt;
165     AcpiFadtData pmfadt = {
166         /* ACPI 5.0: 4.1 Hardware-Reduced ACPI */
167         .rev = 5,
168         .flags = ((1 << ACPI_FADT_F_HW_REDUCED_ACPI) |
169                   (1 << ACPI_FADT_F_RESET_REG_SUP)),
170 
171         /* ACPI 5.0: 4.8.3.7 Sleep Control and Status Registers */
172         .sleep_ctl = {
173             .space_id = AML_AS_SYSTEM_MEMORY,
174             .bit_width = 8,
175             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_CTL,
176         },
177         .sleep_sts = {
178             .space_id = AML_AS_SYSTEM_MEMORY,
179             .bit_width = 8,
180             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_SLEEP_STS,
181         },
182 
183         /* ACPI 5.0: 4.8.3.6 Reset Register */
184         .reset_reg = {
185             .space_id = AML_AS_SYSTEM_MEMORY,
186             .bit_width = 8,
187             .address = GED_MMIO_BASE_REGS + ACPI_GED_REG_RESET,
188         },
189         .reset_val = ACPI_GED_RESET_VALUE,
190     };
191 
192     table_offsets = g_array_new(false, true /* clear */,
193                                         sizeof(uint32_t));
194     bios_linker_loader_alloc(tables->linker,
195                              ACPI_BUILD_TABLE_FILE, tables_blob,
196                              64 /* Ensure FACS is aligned */,
197                              false /* high memory */);
198 
199     dsdt = tables_blob->len;
200     build_dsdt_microvm(tables_blob, tables->linker, mms);
201 
202     pmfadt.dsdt_tbl_offset = &dsdt;
203     pmfadt.xdsdt_tbl_offset = &dsdt;
204     acpi_add_table(table_offsets, tables_blob);
205     build_fadt(tables_blob, tables->linker, &pmfadt, x86ms->oem_id,
206                x86ms->oem_table_id);
207 
208     acpi_add_table(table_offsets, tables_blob);
209     acpi_build_madt(tables_blob, tables->linker, X86_MACHINE(machine),
210                     ACPI_DEVICE_IF(x86ms->acpi_dev), x86ms->oem_id,
211                     x86ms->oem_table_id);
212 
213 #ifdef CONFIG_ACPI_ERST
214     {
215         Object *erst_dev;
216         erst_dev = find_erst_dev();
217         if (erst_dev) {
218             acpi_add_table(table_offsets, tables_blob);
219             build_erst(tables_blob, tables->linker, erst_dev,
220                        x86ms->oem_id, x86ms->oem_table_id);
221         }
222     }
223 #endif
224 
225     xsdt = tables_blob->len;
226     build_xsdt(tables_blob, tables->linker, table_offsets, x86ms->oem_id,
227                x86ms->oem_table_id);
228 
229     /* RSDP is in FSEG memory, so allocate it separately */
230     {
231         AcpiRsdpData rsdp_data = {
232             /* ACPI 2.0: 5.2.4.3 RSDP Structure */
233             .revision = 2, /* xsdt needs v2 */
234             .oem_id = x86ms->oem_id,
235             .xsdt_tbl_offset = &xsdt,
236             .rsdt_tbl_offset = NULL,
237         };
238         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
239     }
240 
241     /* Cleanup memory that's no longer used. */
242     g_array_free(table_offsets, true);
243 }
244 
245 static void acpi_build_no_update(void *build_opaque)
246 {
247     /* nothing, microvm tables don't change at runtime */
248 }
249 
250 void acpi_setup_microvm(MicrovmMachineState *mms)
251 {
252     X86MachineState *x86ms = X86_MACHINE(mms);
253     AcpiBuildTables tables;
254 
255     assert(x86ms->fw_cfg);
256 
257     if (!x86_machine_is_acpi_enabled(x86ms)) {
258         return;
259     }
260 
261     acpi_build_tables_init(&tables);
262     acpi_build_microvm(&tables, mms);
263 
264     /* Now expose it all to Guest */
265     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.table_data,
266                       ACPI_BUILD_TABLE_FILE);
267     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.linker->cmd_blob,
268                       ACPI_BUILD_LOADER_FILE);
269     acpi_add_rom_blob(acpi_build_no_update, NULL, tables.rsdp,
270                       ACPI_BUILD_RSDP_FILE);
271 
272     acpi_build_tables_cleanup(&tables, false);
273 }
274