hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / i386 / acpi-common.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 "qapi/error.h"
25
26 #include "exec/memory.h"
27 #include "hw/acpi/acpi.h"
28 #include "hw/acpi/aml-build.h"
29 #include "hw/acpi/utils.h"
30 #include "hw/i386/pc.h"
31 #include "target/i386/cpu.h"
32
33 #include "acpi-build.h"
34 #include "acpi-common.h"
35
36 void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
37 const CPUArchIdList *apic_ids, GArray *entry)
38 {
39 uint32_t apic_id = apic_ids->cpus[uid].arch_id;
40
41 /* ACPI spec says that LAPIC entry for non present
42 * CPU may be omitted from MADT or it must be marked
43 * as disabled. However omitting non present CPU from
44 * MADT breaks hotplug on linux. So possible CPUs
45 * should be put in MADT but kept disabled.
46 */
47 if (apic_id < 255) {
48 AcpiMadtProcessorApic *apic = acpi_data_push(entry, sizeof *apic);
49
50 apic->type = ACPI_APIC_PROCESSOR;
51 apic->length = sizeof(*apic);
52 apic->processor_id = uid;
53 apic->local_apic_id = apic_id;
54 if (apic_ids->cpus[uid].cpu != NULL) {
55 apic->flags = cpu_to_le32(1);
56 } else {
57 apic->flags = cpu_to_le32(0);
58 }
59 } else {
60 AcpiMadtProcessorX2Apic *apic = acpi_data_push(entry, sizeof *apic);
61
62 apic->type = ACPI_APIC_LOCAL_X2APIC;
63 apic->length = sizeof(*apic);
64 apic->uid = cpu_to_le32(uid);
65 apic->x2apic_id = cpu_to_le32(apic_id);
66 if (apic_ids->cpus[uid].cpu != NULL) {
67 apic->flags = cpu_to_le32(1);
68 } else {
69 apic->flags = cpu_to_le32(0);
70 }
71 }
72 }
73
74 void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
75 X86MachineState *x86ms, AcpiDeviceIf *adev)
76 {
77 MachineClass *mc = MACHINE_GET_CLASS(x86ms);
78 const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms));
79 int madt_start = table_data->len;
80 AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(adev);
81 bool x2apic_mode = false;
82
83 AcpiMultipleApicTable *madt;
84 AcpiMadtIoApic *io_apic;
85 AcpiMadtIntsrcovr *intsrcovr;
86 int i;
87
88 madt = acpi_data_push(table_data, sizeof *madt);
89 madt->local_apic_address = cpu_to_le32(APIC_DEFAULT_ADDRESS);
90 madt->flags = cpu_to_le32(1);
91
92 for (i = 0; i < apic_ids->len; i++) {
93 adevc->madt_cpu(adev, i, apic_ids, table_data);
94 if (apic_ids->cpus[i].arch_id > 254) {
95 x2apic_mode = true;
96 }
97 }
98
99 io_apic = acpi_data_push(table_data, sizeof *io_apic);
100 io_apic->type = ACPI_APIC_IO;
101 io_apic->length = sizeof(*io_apic);
102 io_apic->io_apic_id = ACPI_BUILD_IOAPIC_ID;
103 io_apic->address = cpu_to_le32(IO_APIC_DEFAULT_ADDRESS);
104 io_apic->interrupt = cpu_to_le32(0);
105
106 if (x86ms->apic_xrupt_override) {
107 intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
108 intsrcovr->type = ACPI_APIC_XRUPT_OVERRIDE;
109 intsrcovr->length = sizeof(*intsrcovr);
110 intsrcovr->source = 0;
111 intsrcovr->gsi = cpu_to_le32(2);
112 intsrcovr->flags = cpu_to_le16(0); /* conforms to bus specifications */
113 }
114
115 for (i = 1; i < 16; i++) {
116 if (!(x86ms->pci_irq_mask & (1 << i))) {
117 /* No need for a INT source override structure. */
118 continue;
119 }
120 intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
121 intsrcovr->type = ACPI_APIC_XRUPT_OVERRIDE;
122 intsrcovr->length = sizeof(*intsrcovr);
123 intsrcovr->source = i;
124 intsrcovr->gsi = cpu_to_le32(i);
125 intsrcovr->flags = cpu_to_le16(0xd); /* active high, level triggered */
126 }
127
128 if (x2apic_mode) {
129 AcpiMadtLocalX2ApicNmi *local_nmi;
130
131 local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
132 local_nmi->type = ACPI_APIC_LOCAL_X2APIC_NMI;
133 local_nmi->length = sizeof(*local_nmi);
134 local_nmi->uid = 0xFFFFFFFF; /* all processors */
135 local_nmi->flags = cpu_to_le16(0);
136 local_nmi->lint = 1; /* ACPI_LINT1 */
137 } else {
138 AcpiMadtLocalNmi *local_nmi;
139
140 local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
141 local_nmi->type = ACPI_APIC_LOCAL_NMI;
142 local_nmi->length = sizeof(*local_nmi);
143 local_nmi->processor_id = 0xff; /* all processors */
144 local_nmi->flags = cpu_to_le16(0);
145 local_nmi->lint = 1; /* ACPI_LINT1 */
146 }
147
148 build_header(linker, table_data,
149 (void *)(table_data->data + madt_start), "APIC",
150 table_data->len - madt_start, 1, NULL, NULL);
151 }
152