xref: /openbmc/qemu/hw/riscv/virt-acpi-build.c (revision 05caa062)
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 acpi_dsdt_add_plic_aplic(Aml *scope, uint8_t socket_count,
145                                      uint64_t mmio_base, uint64_t mmio_size,
146                                      const char *hid)
147 {
148     uint64_t plic_aplic_addr;
149     uint32_t gsi_base;
150     uint8_t  socket;
151 
152     for (socket = 0; socket < socket_count; socket++) {
153         plic_aplic_addr = mmio_base + mmio_size * socket;
154         gsi_base = VIRT_IRQCHIP_NUM_SOURCES * socket;
155         Aml *dev = aml_device("IC%.02X", socket);
156         aml_append(dev, aml_name_decl("_HID", aml_string("%s", hid)));
157         aml_append(dev, aml_name_decl("_UID", aml_int(socket)));
158         aml_append(dev, aml_name_decl("_GSB", aml_int(gsi_base)));
159 
160         Aml *crs = aml_resource_template();
161         aml_append(crs, aml_memory32_fixed(plic_aplic_addr, mmio_size,
162                                            AML_READ_WRITE));
163         aml_append(dev, aml_name_decl("_CRS", crs));
164         aml_append(scope, dev);
165     }
166 }
167 
168 static void
169 acpi_dsdt_add_uart(Aml *scope, const MemMapEntry *uart_memmap,
170                     uint32_t uart_irq)
171 {
172     Aml *dev = aml_device("COM0");
173     aml_append(dev, aml_name_decl("_HID", aml_string("RSCV0003")));
174     aml_append(dev, aml_name_decl("_UID", aml_int(0)));
175 
176     Aml *crs = aml_resource_template();
177     aml_append(crs, aml_memory32_fixed(uart_memmap->base,
178                                          uart_memmap->size, AML_READ_WRITE));
179     aml_append(crs,
180                 aml_interrupt(AML_CONSUMER, AML_LEVEL, AML_ACTIVE_HIGH,
181                                AML_EXCLUSIVE, &uart_irq, 1));
182     aml_append(dev, aml_name_decl("_CRS", crs));
183 
184     Aml *pkg = aml_package(2);
185     aml_append(pkg, aml_string("clock-frequency"));
186     aml_append(pkg, aml_int(3686400));
187 
188     Aml *UUID = aml_touuid("DAFFD814-6EBA-4D8C-8A91-BC9BBF4AA301");
189 
190     Aml *pkg1 = aml_package(1);
191     aml_append(pkg1, pkg);
192 
193     Aml *package = aml_package(2);
194     aml_append(package, UUID);
195     aml_append(package, pkg1);
196 
197     aml_append(dev, aml_name_decl("_DSD", package));
198     aml_append(scope, dev);
199 }
200 
201 /*
202  * Serial Port Console Redirection Table (SPCR)
203  * Rev: 1.07
204  */
205 
206 static void
207 spcr_setup(GArray *table_data, BIOSLinker *linker, RISCVVirtState *s)
208 {
209     AcpiSpcrData serial = {
210         .interface_type = 0,       /* 16550 compatible */
211         .base_addr.id = AML_AS_SYSTEM_MEMORY,
212         .base_addr.width = 32,
213         .base_addr.offset = 0,
214         .base_addr.size = 1,
215         .base_addr.addr = s->memmap[VIRT_UART0].base,
216         .interrupt_type = (1 << 4),/* Bit[4] RISC-V PLIC/APLIC */
217         .pc_interrupt = 0,
218         .interrupt = UART0_IRQ,
219         .baud_rate = 7,            /* 15200 */
220         .parity = 0,
221         .stop_bits = 1,
222         .flow_control = 0,
223         .terminal_type = 3,        /* ANSI */
224         .language = 0,             /* Language */
225         .pci_device_id = 0xffff,   /* not a PCI device*/
226         .pci_vendor_id = 0xffff,   /* not a PCI device*/
227         .pci_bus = 0,
228         .pci_device = 0,
229         .pci_function = 0,
230         .pci_flags = 0,
231         .pci_segment = 0,
232     };
233 
234     build_spcr(table_data, linker, &serial, 2, s->oem_id, s->oem_table_id);
235 }
236 
237 /* RHCT Node[N] starts at offset 56 */
238 #define RHCT_NODE_ARRAY_OFFSET 56
239 
240 /*
241  * ACPI spec, Revision 6.5+
242  * 5.2.36 RISC-V Hart Capabilities Table (RHCT)
243  * REF: https://github.com/riscv-non-isa/riscv-acpi/issues/16
244  *      https://drive.google.com/file/d/1nP3nFiH4jkPMp6COOxP6123DCZKR-tia/view
245  *      https://drive.google.com/file/d/1sKbOa8m1UZw1JkquZYe3F1zQBN1xXsaf/view
246  */
247 static void build_rhct(GArray *table_data,
248                        BIOSLinker *linker,
249                        RISCVVirtState *s)
250 {
251     MachineClass *mc = MACHINE_GET_CLASS(s);
252     MachineState *ms = MACHINE(s);
253     const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(ms);
254     size_t len, aligned_len;
255     uint32_t isa_offset, num_rhct_nodes, cmo_offset = 0;
256     RISCVCPU *cpu = &s->soc[0].harts[0];
257     uint32_t mmu_offset = 0;
258     uint8_t satp_mode_max;
259     g_autofree char *isa = NULL;
260 
261     AcpiTable table = { .sig = "RHCT", .rev = 1, .oem_id = s->oem_id,
262                         .oem_table_id = s->oem_table_id };
263 
264     acpi_table_begin(&table, table_data);
265 
266     build_append_int_noprefix(table_data, 0x0, 4);   /* Reserved */
267 
268     /* Time Base Frequency */
269     build_append_int_noprefix(table_data,
270                               RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, 8);
271 
272     /* ISA + N hart info */
273     num_rhct_nodes = 1 + ms->smp.cpus;
274     if (cpu->cfg.ext_zicbom || cpu->cfg.ext_zicboz) {
275         num_rhct_nodes++;
276     }
277 
278     if (cpu->cfg.satp_mode.supported != 0) {
279         num_rhct_nodes++;
280     }
281 
282     /* Number of RHCT nodes*/
283     build_append_int_noprefix(table_data, num_rhct_nodes, 4);
284 
285     /* Offset to the RHCT node array */
286     build_append_int_noprefix(table_data, RHCT_NODE_ARRAY_OFFSET, 4);
287 
288     /* ISA String Node */
289     isa_offset = table_data->len - table.table_offset;
290     build_append_int_noprefix(table_data, 0, 2);   /* Type 0 */
291 
292     isa = riscv_isa_string(cpu);
293     len = 8 + strlen(isa) + 1;
294     aligned_len = (len % 2) ? (len + 1) : len;
295 
296     build_append_int_noprefix(table_data, aligned_len, 2);   /* Length */
297     build_append_int_noprefix(table_data, 0x1, 2);           /* Revision */
298 
299     /* ISA string length including NUL */
300     build_append_int_noprefix(table_data, strlen(isa) + 1, 2);
301     g_array_append_vals(table_data, isa, strlen(isa) + 1);   /* ISA string */
302 
303     if (aligned_len != len) {
304         build_append_int_noprefix(table_data, 0x0, 1);   /* Optional Padding */
305     }
306 
307     /* CMO node */
308     if (cpu->cfg.ext_zicbom || cpu->cfg.ext_zicboz) {
309         cmo_offset = table_data->len - table.table_offset;
310         build_append_int_noprefix(table_data, 1, 2);    /* Type */
311         build_append_int_noprefix(table_data, 10, 2);   /* Length */
312         build_append_int_noprefix(table_data, 0x1, 2);  /* Revision */
313         build_append_int_noprefix(table_data, 0, 1);    /* Reserved */
314 
315         /* CBOM block size */
316         if (cpu->cfg.cbom_blocksize) {
317             build_append_int_noprefix(table_data,
318                                       __builtin_ctz(cpu->cfg.cbom_blocksize),
319                                       1);
320         } else {
321             build_append_int_noprefix(table_data, 0, 1);
322         }
323 
324         /* CBOP block size */
325         build_append_int_noprefix(table_data, 0, 1);
326 
327         /* CBOZ block size */
328         if (cpu->cfg.cboz_blocksize) {
329             build_append_int_noprefix(table_data,
330                                       __builtin_ctz(cpu->cfg.cboz_blocksize),
331                                       1);
332         } else {
333             build_append_int_noprefix(table_data, 0, 1);
334         }
335     }
336 
337     /* MMU node structure */
338     if (cpu->cfg.satp_mode.supported != 0) {
339         satp_mode_max = satp_mode_max_from_map(cpu->cfg.satp_mode.map);
340         mmu_offset = table_data->len - table.table_offset;
341         build_append_int_noprefix(table_data, 2, 2);    /* Type */
342         build_append_int_noprefix(table_data, 8, 2);    /* Length */
343         build_append_int_noprefix(table_data, 0x1, 2);  /* Revision */
344         build_append_int_noprefix(table_data, 0, 1);    /* Reserved */
345         /* MMU Type */
346         if (satp_mode_max == VM_1_10_SV57) {
347             build_append_int_noprefix(table_data, 2, 1);    /* Sv57 */
348         } else if (satp_mode_max == VM_1_10_SV48) {
349             build_append_int_noprefix(table_data, 1, 1);    /* Sv48 */
350         } else if (satp_mode_max == VM_1_10_SV39) {
351             build_append_int_noprefix(table_data, 0, 1);    /* Sv39 */
352         } else {
353             assert(1);
354         }
355     }
356 
357     /* Hart Info Node */
358     for (int i = 0; i < arch_ids->len; i++) {
359         len = 16;
360         int num_offsets = 1;
361         build_append_int_noprefix(table_data, 0xFFFF, 2);  /* Type */
362 
363         /* Length */
364         if (cmo_offset) {
365             len += 4;
366             num_offsets++;
367         }
368 
369         if (mmu_offset) {
370             len += 4;
371             num_offsets++;
372         }
373 
374         build_append_int_noprefix(table_data, len, 2);
375         build_append_int_noprefix(table_data, 0x1, 2); /* Revision */
376         /* Number of offsets */
377         build_append_int_noprefix(table_data, num_offsets, 2);
378         build_append_int_noprefix(table_data, i, 4);   /* ACPI Processor UID */
379         /* Offsets */
380         build_append_int_noprefix(table_data, isa_offset, 4);
381         if (cmo_offset) {
382             build_append_int_noprefix(table_data, cmo_offset, 4);
383         }
384 
385         if (mmu_offset) {
386             build_append_int_noprefix(table_data, mmu_offset, 4);
387         }
388     }
389 
390     acpi_table_end(linker, &table);
391 }
392 
393 /* FADT */
394 static void build_fadt_rev6(GArray *table_data,
395                             BIOSLinker *linker,
396                             RISCVVirtState *s,
397                             unsigned dsdt_tbl_offset)
398 {
399     AcpiFadtData fadt = {
400         .rev = 6,
401         .minor_ver = 5,
402         .flags = 1 << ACPI_FADT_F_HW_REDUCED_ACPI,
403         .xdsdt_tbl_offset = &dsdt_tbl_offset,
404     };
405 
406     build_fadt(table_data, linker, &fadt, s->oem_id, s->oem_table_id);
407 }
408 
409 /* DSDT */
410 static void build_dsdt(GArray *table_data,
411                        BIOSLinker *linker,
412                        RISCVVirtState *s)
413 {
414     Aml *scope, *dsdt;
415     MachineState *ms = MACHINE(s);
416     uint8_t socket_count;
417     const MemMapEntry *memmap = s->memmap;
418     AcpiTable table = { .sig = "DSDT", .rev = 2, .oem_id = s->oem_id,
419                         .oem_table_id = s->oem_table_id };
420 
421 
422     acpi_table_begin(&table, table_data);
423     dsdt = init_aml_allocator();
424 
425     /*
426      * When booting the VM with UEFI, UEFI takes ownership of the RTC hardware.
427      * While UEFI can use libfdt to disable the RTC device node in the DTB that
428      * it passes to the OS, it cannot modify AML. Therefore, we won't generate
429      * the RTC ACPI device at all when using UEFI.
430      */
431     scope = aml_scope("\\_SB");
432     acpi_dsdt_add_cpus(scope, s);
433 
434     fw_cfg_acpi_dsdt_add(scope, &memmap[VIRT_FW_CFG]);
435 
436     socket_count = riscv_socket_count(ms);
437 
438     if (s->aia_type == VIRT_AIA_TYPE_NONE) {
439         acpi_dsdt_add_plic_aplic(scope, socket_count, memmap[VIRT_PLIC].base,
440                                  memmap[VIRT_PLIC].size, "RSCV0001");
441     } else {
442         acpi_dsdt_add_plic_aplic(scope, socket_count, memmap[VIRT_APLIC_S].base,
443                                  memmap[VIRT_APLIC_S].size, "RSCV0002");
444     }
445 
446     acpi_dsdt_add_uart(scope, &memmap[VIRT_UART0], UART0_IRQ);
447 
448     if (socket_count == 1) {
449         virtio_acpi_dsdt_add(scope, memmap[VIRT_VIRTIO].base,
450                              memmap[VIRT_VIRTIO].size,
451                              VIRTIO_IRQ, 0, VIRTIO_COUNT);
452         acpi_dsdt_add_gpex_host(scope, PCIE_IRQ);
453     } else if (socket_count == 2) {
454         virtio_acpi_dsdt_add(scope, memmap[VIRT_VIRTIO].base,
455                              memmap[VIRT_VIRTIO].size,
456                              VIRTIO_IRQ + VIRT_IRQCHIP_NUM_SOURCES, 0,
457                              VIRTIO_COUNT);
458         acpi_dsdt_add_gpex_host(scope, PCIE_IRQ + VIRT_IRQCHIP_NUM_SOURCES);
459     } else {
460         virtio_acpi_dsdt_add(scope, memmap[VIRT_VIRTIO].base,
461                              memmap[VIRT_VIRTIO].size,
462                              VIRTIO_IRQ + VIRT_IRQCHIP_NUM_SOURCES, 0,
463                              VIRTIO_COUNT);
464         acpi_dsdt_add_gpex_host(scope, PCIE_IRQ + VIRT_IRQCHIP_NUM_SOURCES * 2);
465     }
466 
467     aml_append(dsdt, scope);
468 
469     /* copy AML table into ACPI tables blob and patch header there */
470     g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
471 
472     acpi_table_end(linker, &table);
473     free_aml_allocator();
474 }
475 
476 /*
477  * ACPI spec, Revision 6.5+
478  * 5.2.12 Multiple APIC Description Table (MADT)
479  * REF: https://github.com/riscv-non-isa/riscv-acpi/issues/15
480  *      https://drive.google.com/file/d/1R6k4MshhN3WTT-hwqAquu5nX6xSEqK2l/view
481  *      https://drive.google.com/file/d/1oMGPyOD58JaPgMl1pKasT-VKsIKia7zR/view
482  */
483 static void build_madt(GArray *table_data,
484                        BIOSLinker *linker,
485                        RISCVVirtState *s)
486 {
487     MachineClass *mc = MACHINE_GET_CLASS(s);
488     MachineState *ms = MACHINE(s);
489     const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(ms);
490     uint8_t  group_index_bits = imsic_num_bits(riscv_socket_count(ms));
491     uint8_t  guest_index_bits = imsic_num_bits(s->aia_guests + 1);
492     uint16_t imsic_max_hart_per_socket = 0;
493     uint8_t  hart_index_bits;
494     uint64_t aplic_addr;
495     uint32_t gsi_base;
496     uint8_t  socket;
497 
498     for (socket = 0; socket < riscv_socket_count(ms); socket++) {
499         if (imsic_max_hart_per_socket < s->soc[socket].num_harts) {
500             imsic_max_hart_per_socket = s->soc[socket].num_harts;
501         }
502     }
503 
504     hart_index_bits = imsic_num_bits(imsic_max_hart_per_socket);
505 
506     AcpiTable table = { .sig = "APIC", .rev = 6, .oem_id = s->oem_id,
507                         .oem_table_id = s->oem_table_id };
508 
509     acpi_table_begin(&table, table_data);
510     /* Local Interrupt Controller Address */
511     build_append_int_noprefix(table_data, 0, 4);
512     build_append_int_noprefix(table_data, 0, 4);   /* MADT Flags */
513 
514     /* RISC-V Local INTC structures per HART */
515     for (int i = 0; i < arch_ids->len; i++) {
516         riscv_acpi_madt_add_rintc(i, arch_ids, table_data, s);
517     }
518 
519     /* IMSIC */
520     if (s->aia_type == VIRT_AIA_TYPE_APLIC_IMSIC) {
521         /* IMSIC */
522         build_append_int_noprefix(table_data, 0x19, 1);     /* Type */
523         build_append_int_noprefix(table_data, 16, 1);       /* Length */
524         build_append_int_noprefix(table_data, 1, 1);        /* Version */
525         build_append_int_noprefix(table_data, 0, 1);        /* Reserved */
526         build_append_int_noprefix(table_data, 0, 4);        /* Flags */
527         /* Number of supervisor mode Interrupt Identities */
528         build_append_int_noprefix(table_data, VIRT_IRQCHIP_NUM_MSIS, 2);
529         /* Number of guest mode Interrupt Identities */
530         build_append_int_noprefix(table_data, VIRT_IRQCHIP_NUM_MSIS, 2);
531         /* Guest Index Bits */
532         build_append_int_noprefix(table_data, guest_index_bits, 1);
533         /* Hart Index Bits */
534         build_append_int_noprefix(table_data, hart_index_bits, 1);
535         /* Group Index Bits */
536         build_append_int_noprefix(table_data, group_index_bits, 1);
537         /* Group Index Shift */
538         build_append_int_noprefix(table_data, IMSIC_MMIO_GROUP_MIN_SHIFT, 1);
539     }
540 
541     if (s->aia_type != VIRT_AIA_TYPE_NONE) {
542         /* APLICs */
543         for (socket = 0; socket < riscv_socket_count(ms); socket++) {
544             aplic_addr = s->memmap[VIRT_APLIC_S].base +
545                              s->memmap[VIRT_APLIC_S].size * socket;
546             gsi_base = VIRT_IRQCHIP_NUM_SOURCES * socket;
547             build_append_int_noprefix(table_data, 0x1A, 1);    /* Type */
548             build_append_int_noprefix(table_data, 36, 1);      /* Length */
549             build_append_int_noprefix(table_data, 1, 1);       /* Version */
550             build_append_int_noprefix(table_data, socket, 1);  /* APLIC ID */
551             build_append_int_noprefix(table_data, 0, 4);       /* Flags */
552             build_append_int_noprefix(table_data, 0, 8);       /* Hardware ID */
553             /* Number of IDCs */
554             if (s->aia_type == VIRT_AIA_TYPE_APLIC) {
555                 build_append_int_noprefix(table_data,
556                                           s->soc[socket].num_harts,
557                                           2);
558             } else {
559                 build_append_int_noprefix(table_data, 0, 2);
560             }
561             /* Total External Interrupt Sources Supported */
562             build_append_int_noprefix(table_data, VIRT_IRQCHIP_NUM_SOURCES, 2);
563             /* Global System Interrupt Base */
564             build_append_int_noprefix(table_data, gsi_base, 4);
565             /* APLIC Address */
566             build_append_int_noprefix(table_data, aplic_addr, 8);
567             /* APLIC size */
568             build_append_int_noprefix(table_data,
569                                       s->memmap[VIRT_APLIC_S].size, 4);
570         }
571     } else {
572         /* PLICs */
573         for (socket = 0; socket < riscv_socket_count(ms); socket++) {
574             aplic_addr = s->memmap[VIRT_PLIC].base +
575                          s->memmap[VIRT_PLIC].size * socket;
576             gsi_base = VIRT_IRQCHIP_NUM_SOURCES * socket;
577             build_append_int_noprefix(table_data, 0x1B, 1);   /* Type */
578             build_append_int_noprefix(table_data, 36, 1);     /* Length */
579             build_append_int_noprefix(table_data, 1, 1);      /* Version */
580             build_append_int_noprefix(table_data, socket, 1); /* PLIC ID */
581             build_append_int_noprefix(table_data, 0, 8);      /* Hardware ID */
582             /* Total External Interrupt Sources Supported */
583             build_append_int_noprefix(table_data,
584                                       VIRT_IRQCHIP_NUM_SOURCES - 1, 2);
585             build_append_int_noprefix(table_data, 0, 2);     /* Max Priority */
586             build_append_int_noprefix(table_data, 0, 4);     /* Flags */
587             /* PLIC Size */
588             build_append_int_noprefix(table_data, s->memmap[VIRT_PLIC].size, 4);
589             /* PLIC Address */
590             build_append_int_noprefix(table_data, aplic_addr, 8);
591             /* Global System Interrupt Vector Base */
592             build_append_int_noprefix(table_data, gsi_base, 4);
593         }
594     }
595 
596     acpi_table_end(linker, &table);
597 }
598 
599 /*
600  * ACPI spec, Revision 6.5+
601  * 5.2.16 System Resource Affinity Table (SRAT)
602  * REF: https://github.com/riscv-non-isa/riscv-acpi/issues/25
603  *      https://drive.google.com/file/d/1YTdDx2IPm5IeZjAW932EYU-tUtgS08tX/view
604  */
605 static void
606 build_srat(GArray *table_data, BIOSLinker *linker, RISCVVirtState *vms)
607 {
608     int i;
609     uint64_t mem_base;
610     MachineClass *mc = MACHINE_GET_CLASS(vms);
611     MachineState *ms = MACHINE(vms);
612     const CPUArchIdList *cpu_list = mc->possible_cpu_arch_ids(ms);
613     AcpiTable table = { .sig = "SRAT", .rev = 3, .oem_id = vms->oem_id,
614                         .oem_table_id = vms->oem_table_id };
615 
616     acpi_table_begin(&table, table_data);
617     build_append_int_noprefix(table_data, 1, 4); /* Reserved */
618     build_append_int_noprefix(table_data, 0, 8); /* Reserved */
619 
620     for (i = 0; i < cpu_list->len; ++i) {
621         uint32_t nodeid = cpu_list->cpus[i].props.node_id;
622         /*
623          * 5.2.16.8 RINTC Affinity Structure
624          */
625         build_append_int_noprefix(table_data, 7, 1);      /* Type */
626         build_append_int_noprefix(table_data, 20, 1);     /* Length */
627         build_append_int_noprefix(table_data, 0, 2);        /* Reserved */
628         build_append_int_noprefix(table_data, nodeid, 4); /* Proximity Domain */
629         build_append_int_noprefix(table_data, i, 4); /* ACPI Processor UID */
630         /* Flags, Table 5-70 */
631         build_append_int_noprefix(table_data, 1 /* Flags: Enabled */, 4);
632         build_append_int_noprefix(table_data, 0, 4); /* Clock Domain */
633     }
634 
635     mem_base = vms->memmap[VIRT_DRAM].base;
636     for (i = 0; i < ms->numa_state->num_nodes; ++i) {
637         if (ms->numa_state->nodes[i].node_mem > 0) {
638             build_srat_memory(table_data, mem_base,
639                               ms->numa_state->nodes[i].node_mem, i,
640                               MEM_AFFINITY_ENABLED);
641             mem_base += ms->numa_state->nodes[i].node_mem;
642         }
643     }
644 
645     acpi_table_end(linker, &table);
646 }
647 
648 static void virt_acpi_build(RISCVVirtState *s, AcpiBuildTables *tables)
649 {
650     GArray *table_offsets;
651     unsigned dsdt, xsdt;
652     GArray *tables_blob = tables->table_data;
653     MachineState *ms = MACHINE(s);
654 
655     table_offsets = g_array_new(false, true,
656                                 sizeof(uint32_t));
657 
658     bios_linker_loader_alloc(tables->linker,
659                              ACPI_BUILD_TABLE_FILE, tables_blob,
660                              64, false);
661 
662     /* DSDT is pointed to by FADT */
663     dsdt = tables_blob->len;
664     build_dsdt(tables_blob, tables->linker, s);
665 
666     /* FADT and others pointed to by XSDT */
667     acpi_add_table(table_offsets, tables_blob);
668     build_fadt_rev6(tables_blob, tables->linker, s, dsdt);
669 
670     acpi_add_table(table_offsets, tables_blob);
671     build_madt(tables_blob, tables->linker, s);
672 
673     acpi_add_table(table_offsets, tables_blob);
674     build_rhct(tables_blob, tables->linker, s);
675 
676     acpi_add_table(table_offsets, tables_blob);
677     spcr_setup(tables_blob, tables->linker, s);
678 
679     acpi_add_table(table_offsets, tables_blob);
680     {
681         AcpiMcfgInfo mcfg = {
682            .base = s->memmap[VIRT_PCIE_ECAM].base,
683            .size = s->memmap[VIRT_PCIE_ECAM].size,
684         };
685         build_mcfg(tables_blob, tables->linker, &mcfg, s->oem_id,
686                    s->oem_table_id);
687     }
688 
689     if (ms->numa_state->num_nodes > 0) {
690         acpi_add_table(table_offsets, tables_blob);
691         build_srat(tables_blob, tables->linker, s);
692         if (ms->numa_state->have_numa_distance) {
693             acpi_add_table(table_offsets, tables_blob);
694             build_slit(tables_blob, tables->linker, ms, s->oem_id,
695                        s->oem_table_id);
696         }
697     }
698 
699     /* XSDT is pointed to by RSDP */
700     xsdt = tables_blob->len;
701     build_xsdt(tables_blob, tables->linker, table_offsets, s->oem_id,
702                 s->oem_table_id);
703 
704     /* RSDP is in FSEG memory, so allocate it separately */
705     {
706         AcpiRsdpData rsdp_data = {
707             .revision = 2,
708             .oem_id = s->oem_id,
709             .xsdt_tbl_offset = &xsdt,
710             .rsdt_tbl_offset = NULL,
711         };
712         build_rsdp(tables->rsdp, tables->linker, &rsdp_data);
713     }
714 
715     /*
716      * The align size is 128, warn if 64k is not enough therefore
717      * the align size could be resized.
718      */
719     if (tables_blob->len > ACPI_BUILD_TABLE_SIZE / 2) {
720         warn_report("ACPI table size %u exceeds %d bytes,"
721                     " migration may not work",
722                     tables_blob->len, ACPI_BUILD_TABLE_SIZE / 2);
723         error_printf("Try removing some objects.");
724     }
725 
726     acpi_align_size(tables_blob, ACPI_BUILD_TABLE_SIZE);
727 
728     /* Clean up memory that's no longer used */
729     g_array_free(table_offsets, true);
730 }
731 
732 static void acpi_ram_update(MemoryRegion *mr, GArray *data)
733 {
734     uint32_t size = acpi_data_len(data);
735 
736     /*
737      * Make sure RAM size is correct - in case it got changed
738      * e.g. by migration
739      */
740     memory_region_ram_resize(mr, size, &error_abort);
741 
742     memcpy(memory_region_get_ram_ptr(mr), data->data, size);
743     memory_region_set_dirty(mr, 0, size);
744 }
745 
746 static void virt_acpi_build_update(void *build_opaque)
747 {
748     AcpiBuildState *build_state = build_opaque;
749     AcpiBuildTables tables;
750 
751     /* No state to update or already patched? Nothing to do. */
752     if (!build_state || build_state->patched) {
753         return;
754     }
755 
756     build_state->patched = true;
757 
758     acpi_build_tables_init(&tables);
759 
760     virt_acpi_build(RISCV_VIRT_MACHINE(qdev_get_machine()), &tables);
761 
762     acpi_ram_update(build_state->table_mr, tables.table_data);
763     acpi_ram_update(build_state->rsdp_mr, tables.rsdp);
764     acpi_ram_update(build_state->linker_mr, tables.linker->cmd_blob);
765 
766     acpi_build_tables_cleanup(&tables, true);
767 }
768 
769 static void virt_acpi_build_reset(void *build_opaque)
770 {
771     AcpiBuildState *build_state = build_opaque;
772     build_state->patched = false;
773 }
774 
775 static const VMStateDescription vmstate_virt_acpi_build = {
776     .name = "virt_acpi_build",
777     .version_id = 1,
778     .minimum_version_id = 1,
779     .fields = (const VMStateField[]) {
780         VMSTATE_BOOL(patched, AcpiBuildState),
781         VMSTATE_END_OF_LIST()
782     },
783 };
784 
785 void virt_acpi_setup(RISCVVirtState *s)
786 {
787     AcpiBuildTables tables;
788     AcpiBuildState *build_state;
789 
790     build_state = g_malloc0(sizeof *build_state);
791 
792     acpi_build_tables_init(&tables);
793     virt_acpi_build(s, &tables);
794 
795     /* Now expose it all to Guest */
796     build_state->table_mr = acpi_add_rom_blob(virt_acpi_build_update,
797                                               build_state, tables.table_data,
798                                               ACPI_BUILD_TABLE_FILE);
799     assert(build_state->table_mr != NULL);
800 
801     build_state->linker_mr = acpi_add_rom_blob(virt_acpi_build_update,
802                                                build_state,
803                                                tables.linker->cmd_blob,
804                                                ACPI_BUILD_LOADER_FILE);
805 
806     build_state->rsdp_mr = acpi_add_rom_blob(virt_acpi_build_update,
807                                              build_state, tables.rsdp,
808                                              ACPI_BUILD_RSDP_FILE);
809 
810     qemu_register_reset(virt_acpi_build_reset, build_state);
811     virt_acpi_build_reset(build_state);
812     vmstate_register(NULL, 0, &vmstate_virt_acpi_build, build_state);
813 
814     /*
815      * Clean up tables but don't free the memory: we track it
816      * in build_state.
817      */
818     acpi_build_tables_cleanup(&tables, false);
819 }
820