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qga/qapi-schema: Clean up documentation of guest-set-vcpus
[qemu/kevin.git] / hw / riscv / virt-acpi-build.c
blob26c7e4482d75a73f4a8a5440d79d26f24110fbf9
1 /*
2 * Support for generating ACPI tables and passing them to Guests
3 *
4 * RISC-V virt ACPI generation
5 *
6 * Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
7 * Copyright (C) 2006 Fabrice Bellard
8 * Copyright (C) 2013 Red Hat Inc
9 * Copyright (c) 2015 HUAWEI TECHNOLOGIES CO.,LTD.
10 * Copyright (C) 2021-2023 Ventana Micro Systems Inc
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, see <http://www.gnu.org/licenses/>.
24 */
25
26 #include "qemu/osdep.h"
27 #include "hw/acpi/acpi-defs.h"
28 #include "hw/acpi/acpi.h"
29 #include "hw/acpi/aml-build.h"
30 #include "hw/acpi/pci.h"
31 #include "hw/acpi/utils.h"
32 #include "hw/intc/riscv_aclint.h"
33 #include "hw/nvram/fw_cfg_acpi.h"
34 #include "hw/pci-host/gpex.h"
35 #include "hw/riscv/virt.h"
36 #include "hw/riscv/numa.h"
37 #include "hw/virtio/virtio-acpi.h"
38 #include "migration/vmstate.h"
39 #include "qapi/error.h"
40 #include "qemu/error-report.h"
41 #include "sysemu/reset.h"
42
43 #define ACPI_BUILD_TABLE_SIZE 0x20000
44 #define ACPI_BUILD_INTC_ID(socket, index) ((socket << 24) | (index))
45
46 typedef struct AcpiBuildState {
47 /* Copy of table in RAM (for patching) */
48 MemoryRegion *table_mr;
49 MemoryRegion *rsdp_mr;
50 MemoryRegion *linker_mr;
51 /* Is table patched? */
52 bool patched;
53 } AcpiBuildState;
54
55 static void acpi_align_size(GArray *blob, unsigned align)
56 {
57 /*
58 * Align size to multiple of given size. This reduces the chance
59 * we need to change size in the future (breaking cross version migration).
60 */
61 g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
62 }
63
64 static void riscv_acpi_madt_add_rintc(uint32_t uid,
65 const CPUArchIdList *arch_ids,
66 GArray *entry,
67 RISCVVirtState *s)
68 {
69 uint8_t guest_index_bits = imsic_num_bits(s->aia_guests + 1);
70 uint64_t hart_id = arch_ids->cpus[uid].arch_id;
71 uint32_t imsic_size, local_cpu_id, socket_id;
72 uint64_t imsic_socket_addr, imsic_addr;
73 MachineState *ms = MACHINE(s);
74
75 socket_id = arch_ids->cpus[uid].props.node_id;
76 local_cpu_id = (arch_ids->cpus[uid].arch_id -
77 riscv_socket_first_hartid(ms, socket_id)) %
78 riscv_socket_hart_count(ms, socket_id);
79 imsic_socket_addr = s->memmap[VIRT_IMSIC_S].base +
80 (socket_id * VIRT_IMSIC_GROUP_MAX_SIZE);
81 imsic_size = IMSIC_HART_SIZE(guest_index_bits);
82 imsic_addr = imsic_socket_addr + local_cpu_id * imsic_size;
83 build_append_int_noprefix(entry, 0x18, 1); /* Type */
84 build_append_int_noprefix(entry, 36, 1); /* Length */
85 build_append_int_noprefix(entry, 1, 1); /* Version */
86 build_append_int_noprefix(entry, 0, 1); /* Reserved */
87 build_append_int_noprefix(entry, 0x1, 4); /* Flags */
88 build_append_int_noprefix(entry, hart_id, 8); /* Hart ID */
89 build_append_int_noprefix(entry, uid, 4); /* ACPI Processor UID */
90 /* External Interrupt Controller ID */
91 if (s->aia_type == VIRT_AIA_TYPE_APLIC) {
92 build_append_int_noprefix(entry,
93 ACPI_BUILD_INTC_ID(
94 arch_ids->cpus[uid].props.node_id,
95 local_cpu_id),
96 4);
97 } else if (s->aia_type == VIRT_AIA_TYPE_NONE) {
98 build_append_int_noprefix(entry,
99 ACPI_BUILD_INTC_ID(
100 arch_ids->cpus[uid].props.node_id,
101 2 * local_cpu_id + 1),
102 4);
103 } else {
104 build_append_int_noprefix(entry, 0, 4);
105 }
106
107 if (s->aia_type == VIRT_AIA_TYPE_APLIC_IMSIC) {
108 /* IMSIC Base address */
109 build_append_int_noprefix(entry, imsic_addr, 8);
110 /* IMSIC Size */
111 build_append_int_noprefix(entry, imsic_size, 4);
112 } else {
113 build_append_int_noprefix(entry, 0, 8);
114 build_append_int_noprefix(entry, 0, 4);
115 }
116 }
117
118 static void acpi_dsdt_add_cpus(Aml *scope, RISCVVirtState *s)
119 {
120 MachineClass *mc = MACHINE_GET_CLASS(s);
121 MachineState *ms = MACHINE(s);
122 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(ms);
123
124 for (int i = 0; i < arch_ids->len; i++) {
125 Aml *dev;
126 GArray *madt_buf = g_array_new(0, 1, 1);
127
128 dev = aml_device("C%.03X", i);
129 aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
130 aml_append(dev, aml_name_decl("_UID",
131 aml_int(arch_ids->cpus[i].arch_id)));
132
133 /* build _MAT object */
134 riscv_acpi_madt_add_rintc(i, arch_ids, madt_buf, s);
135 aml_append(dev, aml_name_decl("_MAT",
136 aml_buffer(madt_buf->len,
137 (uint8_t *)madt_buf->data)));
138 g_array_free(madt_buf, true);
139
140 aml_append(scope, dev);
141 }
142 }
143
144 static void
145 acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
146 uint32_t uart_irq)
147 {
148 Aml *dev = aml_device("COM0");
149 aml_append(dev, aml_name_decl("_HID", aml_string("PNP0501")));
150 aml_append(dev, aml_name_decl("_UID", aml_int(0)));
151
152 Aml *crs = aml_resource_template();
153 aml_append(crs, aml_memory32_fixed(uart_memmap->base,
154 uart_memmap->size, AML_READ_WRITE));
155 aml_append(crs,
156 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
157 AML_EXCLUSIVE, &uart_irq, 1));
158 aml_append(dev, aml_name_decl("_CRS", crs));
159
160 Aml *pkg = aml_package(2);
161 aml_append(pkg, aml_string("clock-frequency"));
162 aml_append(pkg, aml_int(3686400));
163
164 Aml *UUID = aml_touuid("DAFFD814-6EBA-4D8C-8A91-BC9BBF4AA301");
165
166 Aml *pkg1 = aml_package(1);
167 aml_append(pkg1, pkg);
168
169 Aml *package = aml_package(2);
170 aml_append(package, UUID);
171 aml_append(package, pkg1);
172
173 aml_append(dev, aml_name_decl("_DSD", package));
174 aml_append(scope, dev);
175 }
176
177 /* RHCT Node[N] starts at offset 56 */
178 #define RHCT_NODE_ARRAY_OFFSET 56
179
180 /*
181 * ACPI spec, Revision 6.5+
182 * 5.2.36 RISC-V Hart Capabilities Table (RHCT)
183 * REF: https://github.com/riscv-non-isa/riscv-acpi/issues/16
184 * https://drive.google.com/file/d/1nP3nFiH4jkPMp6COOxP6123DCZKR-tia/view
185 * https://drive.google.com/file/d/1sKbOa8m1UZw1JkquZYe3F1zQBN1xXsaf/view
186 */
187 static void build_rhct(GArray *table_data,
188 BIOSLinker *linker,
189 RISCVVirtState *s)
190 {
191 MachineClass *mc = MACHINE_GET_CLASS(s);
192 MachineState *ms = MACHINE(s);
193 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(ms);
194 size_t len, aligned_len;
195 uint32_t isa_offset, num_rhct_nodes, cmo_offset = 0;
196 RISCVCPU *cpu = &s->soc[0].harts[0];
197 uint32_t mmu_offset = 0;
198 uint8_t satp_mode_max;
199 char *isa;
200
201 AcpiTable table = { .sig = "RHCT", .rev = 1, .oem_id = s->oem_id,
202 .oem_table_id = s->oem_table_id };
203
204 acpi_table_begin(&table, table_data);
205
206 build_append_int_noprefix(table_data, 0x0, 4); /* Reserved */
207
208 /* Time Base Frequency */
209 build_append_int_noprefix(table_data,
210 RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, 8);
211
212 /* ISA + N hart info */
213 num_rhct_nodes = 1 + ms->smp.cpus;
214 if (cpu->cfg.ext_zicbom || cpu->cfg.ext_zicboz) {
215 num_rhct_nodes++;
216 }
217
218 if (cpu->cfg.satp_mode.supported != 0) {
219 num_rhct_nodes++;
220 }
221
222 /* Number of RHCT nodes*/
223 build_append_int_noprefix(table_data, num_rhct_nodes, 4);
224
225 /* Offset to the RHCT node array */
226 build_append_int_noprefix(table_data, RHCT_NODE_ARRAY_OFFSET, 4);
227
228 /* ISA String Node */
229 isa_offset = table_data->len - table.table_offset;
230 build_append_int_noprefix(table_data, 0, 2); /* Type 0 */
231
232 isa = riscv_isa_string(cpu);
233 len = 8 + strlen(isa) + 1;
234 aligned_len = (len % 2) ? (len + 1) : len;
235
236 build_append_int_noprefix(table_data, aligned_len, 2); /* Length */
237 build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
238
239 /* ISA string length including NUL */
240 build_append_int_noprefix(table_data, strlen(isa) + 1, 2);
241 g_array_append_vals(table_data, isa, strlen(isa) + 1); /* ISA string */
242
243 if (aligned_len != len) {
244 build_append_int_noprefix(table_data, 0x0, 1); /* Optional Padding */
245 }
246
247 /* CMO node */
248 if (cpu->cfg.ext_zicbom || cpu->cfg.ext_zicboz) {
249 cmo_offset = table_data->len - table.table_offset;
250 build_append_int_noprefix(table_data, 1, 2); /* Type */
251 build_append_int_noprefix(table_data, 10, 2); /* Length */
252 build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
253 build_append_int_noprefix(table_data, 0, 1); /* Reserved */
254
255 /* CBOM block size */
256 if (cpu->cfg.cbom_blocksize) {
257 build_append_int_noprefix(table_data,
258 __builtin_ctz(cpu->cfg.cbom_blocksize),
259 1);
260 } else {
261 build_append_int_noprefix(table_data, 0, 1);
262 }
263
264 /* CBOP block size */
265 build_append_int_noprefix(table_data, 0, 1);
266
267 /* CBOZ block size */
268 if (cpu->cfg.cboz_blocksize) {
269 build_append_int_noprefix(table_data,
270 __builtin_ctz(cpu->cfg.cboz_blocksize),
271 1);
272 } else {
273 build_append_int_noprefix(table_data, 0, 1);
274 }
275 }
276
277 /* MMU node structure */
278 if (cpu->cfg.satp_mode.supported != 0) {
279 satp_mode_max = satp_mode_max_from_map(cpu->cfg.satp_mode.map);
280 mmu_offset = table_data->len - table.table_offset;
281 build_append_int_noprefix(table_data, 2, 2); /* Type */
282 build_append_int_noprefix(table_data, 8, 2); /* Length */
283 build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
284 build_append_int_noprefix(table_data, 0, 1); /* Reserved */
285 /* MMU Type */
286 if (satp_mode_max == VM_1_10_SV57) {
287 build_append_int_noprefix(table_data, 2, 1); /* Sv57 */
288 } else if (satp_mode_max == VM_1_10_SV48) {
289 build_append_int_noprefix(table_data, 1, 1); /* Sv48 */
290 } else if (satp_mode_max == VM_1_10_SV39) {
291 build_append_int_noprefix(table_data, 0, 1); /* Sv39 */
292 } else {
293 assert(1);
294 }
295 }
296
297 /* Hart Info Node */
298 for (int i = 0; i < arch_ids->len; i++) {
299 len = 16;
300 int num_offsets = 1;
301 build_append_int_noprefix(table_data, 0xFFFF, 2); /* Type */
302
303 /* Length */
304 if (cmo_offset) {
305 len += 4;
306 num_offsets++;
307 }
308
309 if (mmu_offset) {
310 len += 4;
311 num_offsets++;
312 }
313
314 build_append_int_noprefix(table_data, len, 2);
315 build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
316 /* Number of offsets */
317 build_append_int_noprefix(table_data, num_offsets, 2);
318 build_append_int_noprefix(table_data, i, 4); /* ACPI Processor UID */
319 /* Offsets */
320 build_append_int_noprefix(table_data, isa_offset, 4);
321 if (cmo_offset) {
322 build_append_int_noprefix(table_data, cmo_offset, 4);
323 }
324
325 if (mmu_offset) {
326 build_append_int_noprefix(table_data, mmu_offset, 4);
327 }
328 }
329
330 acpi_table_end(linker, &table);
331 }
332
333 /* FADT */
334 static void build_fadt_rev6(GArray *table_data,
335 BIOSLinker *linker,
336 RISCVVirtState *s,
337 unsigned dsdt_tbl_offset)
338 {
339 AcpiFadtData fadt = {
340 .rev = 6,
341 .minor_ver = 5,
342 .flags = 1 << ACPI_FADT_F_HW_REDUCED_ACPI,
343 .xdsdt_tbl_offset = &dsdt_tbl_offset,
344 };
345
346 build_fadt(table_data, linker, &fadt, s->oem_id, s->oem_table_id);
347 }
348
349 /* DSDT */
350 static void build_dsdt(GArray *table_data,
351 BIOSLinker *linker,
352 RISCVVirtState *s)
353 {
354 Aml *scope, *dsdt;
355 MachineState *ms = MACHINE(s);
356 uint8_t socket_count;
357 const MemMapEntry *memmap = s->memmap;
358 AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = s->oem_id,
359 .oem_table_id = s->oem_table_id };
360
361
362 acpi_table_begin(&table, table_data);
363 dsdt = init_aml_allocator();
364
365 /*
366 * When booting the VM with UEFI, UEFI takes ownership of the RTC hardware.
367 * While UEFI can use libfdt to disable the RTC device node in the DTB that
368 * it passes to the OS, it cannot modify AML. Therefore, we won't generate
369 * the RTC ACPI device at all when using UEFI.
370 */
371 scope = aml_scope("\\_SB");
372 acpi_dsdt_add_cpus(scope, s);
373
374 fw_cfg_acpi_dsdt_add(scope, &memmap[VIRT_FW_CFG]);
375
376 socket_count = riscv_socket_count(ms);
377
378 acpi_dsdt_add_uart(scope, &memmap[VIRT_UART0], UART0_IRQ);
379
380 if (socket_count == 1) {
381 virtio_acpi_dsdt_add(scope, memmap[VIRT_VIRTIO].base,
382 memmap[VIRT_VIRTIO].size,
383 VIRTIO_IRQ, 0, VIRTIO_COUNT);
384 acpi_dsdt_add_gpex_host(scope, PCIE_IRQ);
385 } else if (socket_count == 2) {
386 virtio_acpi_dsdt_add(scope, memmap[VIRT_VIRTIO].base,
387 memmap[VIRT_VIRTIO].size,
388 VIRTIO_IRQ + VIRT_IRQCHIP_NUM_SOURCES, 0,
389 VIRTIO_COUNT);
390 acpi_dsdt_add_gpex_host(scope, PCIE_IRQ + VIRT_IRQCHIP_NUM_SOURCES);
391 } else {
392 virtio_acpi_dsdt_add(scope, memmap[VIRT_VIRTIO].base,
393 memmap[VIRT_VIRTIO].size,
394 VIRTIO_IRQ + VIRT_IRQCHIP_NUM_SOURCES, 0,
395 VIRTIO_COUNT);
396 acpi_dsdt_add_gpex_host(scope, PCIE_IRQ + VIRT_IRQCHIP_NUM_SOURCES * 2);
397 }
398
399 aml_append(dsdt, scope);
400
401 /* copy AML table into ACPI tables blob and patch header there */
402 g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
403
404 acpi_table_end(linker, &table);
405 free_aml_allocator();
406 }
407
408 /*
409 * ACPI spec, Revision 6.5+
410 * 5.2.12 Multiple APIC Description Table (MADT)
411 * REF: https://github.com/riscv-non-isa/riscv-acpi/issues/15
412 * https://drive.google.com/file/d/1R6k4MshhN3WTT-hwqAquu5nX6xSEqK2l/view
413 * https://drive.google.com/file/d/1oMGPyOD58JaPgMl1pKasT-VKsIKia7zR/view
414 */
415 static void build_madt(GArray *table_data,
416 BIOSLinker *linker,
417 RISCVVirtState *s)
418 {
419 MachineClass *mc = MACHINE_GET_CLASS(s);
420 MachineState *ms = MACHINE(s);
421 const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(ms);
422 uint8_t group_index_bits = imsic_num_bits(riscv_socket_count(ms));
423 uint8_t guest_index_bits = imsic_num_bits(s->aia_guests + 1);
424 uint16_t imsic_max_hart_per_socket = 0;
425 uint8_t hart_index_bits;
426 uint64_t aplic_addr;
427 uint32_t gsi_base;
428 uint8_t socket;
429
430 for (socket = 0; socket < riscv_socket_count(ms); socket++) {
431 if (imsic_max_hart_per_socket < s->soc[socket].num_harts) {
432 imsic_max_hart_per_socket = s->soc[socket].num_harts;
433 }
434 }
435
436 hart_index_bits = imsic_num_bits(imsic_max_hart_per_socket);
437
438 AcpiTable table = { .sig = "APIC", .rev = 6, .oem_id = s->oem_id,
439 .oem_table_id = s->oem_table_id };
440
441 acpi_table_begin(&table, table_data);
442 /* Local Interrupt Controller Address */
443 build_append_int_noprefix(table_data, 0, 4);
444 build_append_int_noprefix(table_data, 0, 4); /* MADT Flags */
445
446 /* RISC-V Local INTC structures per HART */
447 for (int i = 0; i < arch_ids->len; i++) {
448 riscv_acpi_madt_add_rintc(i, arch_ids, table_data, s);
449 }
450
451 /* IMSIC */
452 if (s->aia_type == VIRT_AIA_TYPE_APLIC_IMSIC) {
453 /* IMSIC */
454 build_append_int_noprefix(table_data, 0x19, 1); /* Type */
455 build_append_int_noprefix(table_data, 16, 1); /* Length */
456 build_append_int_noprefix(table_data, 1, 1); /* Version */
457 build_append_int_noprefix(table_data, 0, 1); /* Reserved */
458 build_append_int_noprefix(table_data, 0, 4); /* Flags */
459 /* Number of supervisor mode Interrupt Identities */
460 build_append_int_noprefix(table_data, VIRT_IRQCHIP_NUM_MSIS, 2);
461 /* Number of guest mode Interrupt Identities */
462 build_append_int_noprefix(table_data, VIRT_IRQCHIP_NUM_MSIS, 2);
463 /* Guest Index Bits */
464 build_append_int_noprefix(table_data, guest_index_bits, 1);
465 /* Hart Index Bits */
466 build_append_int_noprefix(table_data, hart_index_bits, 1);
467 /* Group Index Bits */
468 build_append_int_noprefix(table_data, group_index_bits, 1);
469 /* Group Index Shift */
470 build_append_int_noprefix(table_data, IMSIC_MMIO_GROUP_MIN_SHIFT, 1);
471 }
472
473 if (s->aia_type != VIRT_AIA_TYPE_NONE) {
474 /* APLICs */
475 for (socket = 0; socket < riscv_socket_count(ms); socket++) {
476 aplic_addr = s->memmap[VIRT_APLIC_S].base +
477 s->memmap[VIRT_APLIC_S].size * socket;
478 gsi_base = VIRT_IRQCHIP_NUM_SOURCES * socket;
479 build_append_int_noprefix(table_data, 0x1A, 1); /* Type */
480 build_append_int_noprefix(table_data, 36, 1); /* Length */
481 build_append_int_noprefix(table_data, 1, 1); /* Version */
482 build_append_int_noprefix(table_data, socket, 1); /* APLIC ID */
483 build_append_int_noprefix(table_data, 0, 4); /* Flags */
484 build_append_int_noprefix(table_data, 0, 8); /* Hardware ID */
485 /* Number of IDCs */
486 if (s->aia_type == VIRT_AIA_TYPE_APLIC) {
487 build_append_int_noprefix(table_data,
488 s->soc[socket].num_harts,
489 2);
490 } else {
491 build_append_int_noprefix(table_data, 0, 2);
492 }
493 /* Total External Interrupt Sources Supported */
494 build_append_int_noprefix(table_data, VIRT_IRQCHIP_NUM_SOURCES, 2);
495 /* Global System Interrupt Base */
496 build_append_int_noprefix(table_data, gsi_base, 4);
497 /* APLIC Address */
498 build_append_int_noprefix(table_data, aplic_addr, 8);
499 /* APLIC size */
500 build_append_int_noprefix(table_data,
501 s->memmap[VIRT_APLIC_S].size, 4);
502 }
503 } else {
504 /* PLICs */
505 for (socket = 0; socket < riscv_socket_count(ms); socket++) {
506 aplic_addr = s->memmap[VIRT_PLIC].base +
507 s->memmap[VIRT_PLIC].size * socket;
508 gsi_base = VIRT_IRQCHIP_NUM_SOURCES * socket;
509 build_append_int_noprefix(table_data, 0x1B, 1); /* Type */
510 build_append_int_noprefix(table_data, 36, 1); /* Length */
511 build_append_int_noprefix(table_data, 1, 1); /* Version */
512 build_append_int_noprefix(table_data, socket, 1); /* PLIC ID */
513 build_append_int_noprefix(table_data, 0, 8); /* Hardware ID */
514 /* Total External Interrupt Sources Supported */
515 build_append_int_noprefix(table_data,
516 VIRT_IRQCHIP_NUM_SOURCES - 1, 2);
517 build_append_int_noprefix(table_data, 0, 2); /* Max Priority */
518 build_append_int_noprefix(table_data, 0, 4); /* Flags */
519 /* PLIC Size */
520 build_append_int_noprefix(table_data, s->memmap[VIRT_PLIC].size, 4);
521 /* PLIC Address */
522 build_append_int_noprefix(table_data, aplic_addr, 8);
523 /* Global System Interrupt Vector Base */
524 build_append_int_noprefix(table_data, gsi_base, 4);
525 }
526 }
527
528 acpi_table_end(linker, &table);
529 }
530
531 static void virt_acpi_build(RISCVVirtState *s, AcpiBuildTables *tables)
532 {
533 GArray *table_offsets;
534 unsigned dsdt, xsdt;
535 GArray *tables_blob = tables->table_data;
536
537 table_offsets = g_array_new(false, true,
538 sizeof(uint32_t));
539
540 bios_linker_loader_alloc(tables->linker,
541 ACPI_BUILD_TABLE_FILE, tables_blob,
542 64, false);
543
544 /* DSDT is pointed to by FADT */
545 dsdt = tables_blob->len;
546 build_dsdt(tables_blob, tables->linker, s);
547
548 /* FADT and others pointed to by XSDT */
549 acpi_add_table(table_offsets, tables_blob);
550 build_fadt_rev6(tables_blob, tables->linker, s, dsdt);
551
552 acpi_add_table(table_offsets, tables_blob);
553 build_madt(tables_blob, tables->linker, s);
554
555 acpi_add_table(table_offsets, tables_blob);
556 build_rhct(tables_blob, tables->linker, s);
557
558 acpi_add_table(table_offsets, tables_blob);
559 {
560 AcpiMcfgInfo mcfg = {
561 .base = s->memmap[VIRT_PCIE_MMIO].base,
562 .size = s->memmap[VIRT_PCIE_MMIO].size,
563 };
564 build_mcfg(tables_blob, tables->linker, &mcfg, s->oem_id,
565 s->oem_table_id);
566 }
567
568 /* XSDT is pointed to by RSDP */
569 xsdt = tables_blob->len;
570 build_xsdt(tables_blob, tables->linker, table_offsets, s->oem_id,
571 s->oem_table_id);
572
573 /* RSDP is in FSEG memory, so allocate it separately */
574 {
575 AcpiRsdpData rsdp_data = {
576 .revision = 2,
577 .oem_id = s->oem_id,
578 .xsdt_tbl_offset = &xsdt,
579 .rsdt_tbl_offset = NULL,
580 };
581 build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
582 }
583
584 /*
585 * The align size is 128, warn if 64k is not enough therefore
586 * the align size could be resized.
587 */
588 if (tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) {
589 warn_report("ACPI table size %u exceeds %d bytes,"
590 " migration may not work",
591 tables_blob->len, ACPI_BUILD_TABLE_SIZE / 2);
592 error_printf("Try removing some objects.");
593 }
594
595 acpi_align_size(tables_blob, ACPI_BUILD_TABLE_SIZE);
596
597 /* Clean up memory that's no longer used */
598 g_array_free(table_offsets, true);
599 }
600
601 static void acpi_ram_update(MemoryRegion *mr, GArray *data)
602 {
603 uint32_t size = acpi_data_len(data);
604
605 /*
606 * Make sure RAM size is correct - in case it got changed
607 * e.g. by migration
608 */
609 memory_region_ram_resize(mr, size, &error_abort);
610
611 memcpy(memory_region_get_ram_ptr(mr), data->data, size);
612 memory_region_set_dirty(mr, 0, size);
613 }
614
615 static void virt_acpi_build_update(void *build_opaque)
616 {
617 AcpiBuildState *build_state = build_opaque;
618 AcpiBuildTables tables;
619
620 /* No state to update or already patched? Nothing to do. */
621 if (!build_state || build_state->patched) {
622 return;
623 }
624
625 build_state->patched = true;
626
627 acpi_build_tables_init(&tables);
628
629 virt_acpi_build(RISCV_VIRT_MACHINE(qdev_get_machine()), &tables);
630
631 acpi_ram_update(build_state->table_mr, tables.table_data);
632 acpi_ram_update(build_state->rsdp_mr, tables.rsdp);
633 acpi_ram_update(build_state->linker_mr, tables.linker->cmd_blob);
634
635 acpi_build_tables_cleanup(&tables, true);
636 }
637
638 static void virt_acpi_build_reset(void *build_opaque)
639 {
640 AcpiBuildState *build_state = build_opaque;
641 build_state->patched = false;
642 }
643
644 static const VMStateDescription vmstate_virt_acpi_build = {
645 .name = "virt_acpi_build",
646 .version_id = 1,
647 .minimum_version_id = 1,
648 .fields = (const VMStateField[]) {
649 VMSTATE_BOOL(patched, AcpiBuildState),
650 VMSTATE_END_OF_LIST()
651 },
652 };
653
654 void virt_acpi_setup(RISCVVirtState *s)
655 {
656 AcpiBuildTables tables;
657 AcpiBuildState *build_state;
658
659 build_state = g_malloc0(sizeof *build_state);
660
661 acpi_build_tables_init(&tables);
662 virt_acpi_build(s, &tables);
663
664 /* Now expose it all to Guest */
665 build_state->table_mr = acpi_add_rom_blob(virt_acpi_build_update,
666 build_state, tables.table_data,
667 ACPI_BUILD_TABLE_FILE);
668 assert(build_state->table_mr != NULL);
669
670 build_state->linker_mr = acpi_add_rom_blob(virt_acpi_build_update,
671 build_state,
672 tables.linker->cmd_blob,
673 ACPI_BUILD_LOADER_FILE);
674
675 build_state->rsdp_mr = acpi_add_rom_blob(virt_acpi_build_update,
676 build_state, tables.rsdp,
677 ACPI_BUILD_RSDP_FILE);
678
679 qemu_register_reset(virt_acpi_build_reset, build_state);
680 virt_acpi_build_reset(build_state);
681 vmstate_register(NULL, 0, &vmstate_virt_acpi_build, build_state);
682
683 /*
684 * Clean up tables but don't free the memory: we track it
685 * in build_state.
686 */
687 acpi_build_tables_cleanup(&tables, false);
688 }
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