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(int uid, const CPUArchIdList *apic_ids, 37 GArray *entry, bool force_enabled) 38 { 39 uint32_t apic_id = apic_ids->cpus[uid].arch_id; 40 /* Flags – Local APIC Flags */ 41 uint32_t flags = apic_ids->cpus[uid].cpu != NULL || force_enabled ? 42 1 /* Enabled */ : 0; 43 44 /* ACPI spec says that LAPIC entry for non present 45 * CPU may be omitted from MADT or it must be marked 46 * as disabled. However omitting non present CPU from 47 * MADT breaks hotplug on linux. So possible CPUs 48 * should be put in MADT but kept disabled. 49 */ 50 if (apic_id < 255) { 51 /* Rev 1.0b, Table 5-13 Processor Local APIC Structure */ 52 build_append_int_noprefix(entry, 0, 1); /* Type */ 53 build_append_int_noprefix(entry, 8, 1); /* Length */ 54 build_append_int_noprefix(entry, uid, 1); /* ACPI Processor ID */ 55 build_append_int_noprefix(entry, apic_id, 1); /* APIC ID */ 56 build_append_int_noprefix(entry, flags, 4); /* Flags */ 57 } else { 58 /* Rev 4.0, 5.2.12.12 Processor Local x2APIC Structure */ 59 build_append_int_noprefix(entry, 9, 1); /* Type */ 60 build_append_int_noprefix(entry, 16, 1); /* Length */ 61 build_append_int_noprefix(entry, 0, 2); /* Reserved */ 62 build_append_int_noprefix(entry, apic_id, 4); /* X2APIC ID */ 63 build_append_int_noprefix(entry, flags, 4); /* Flags */ 64 build_append_int_noprefix(entry, uid, 4); /* ACPI Processor UID */ 65 } 66 } 67 68 static void build_ioapic(GArray *entry, uint8_t id, uint32_t addr, uint32_t irq) 69 { 70 /* Rev 1.0b, 5.2.8.2 IO APIC */ 71 build_append_int_noprefix(entry, 1, 1); /* Type */ 72 build_append_int_noprefix(entry, 12, 1); /* Length */ 73 build_append_int_noprefix(entry, id, 1); /* IO APIC ID */ 74 build_append_int_noprefix(entry, 0, 1); /* Reserved */ 75 build_append_int_noprefix(entry, addr, 4); /* IO APIC Address */ 76 build_append_int_noprefix(entry, irq, 4); /* System Vector Base */ 77 } 78 79 static void 80 build_xrupt_override(GArray *entry, uint8_t src, uint32_t gsi, uint16_t flags) 81 { 82 /* Rev 1.0b, 5.2.8.3.1 Interrupt Source Overrides */ 83 build_append_int_noprefix(entry, 2, 1); /* Type */ 84 build_append_int_noprefix(entry, 10, 1); /* Length */ 85 build_append_int_noprefix(entry, 0, 1); /* Bus */ 86 build_append_int_noprefix(entry, src, 1); /* Source */ 87 /* Global System Interrupt Vector */ 88 build_append_int_noprefix(entry, gsi, 4); 89 build_append_int_noprefix(entry, flags, 2); /* Flags */ 90 } 91 92 /* 93 * ACPI spec, Revision 1.0b 94 * 5.2.8 Multiple APIC Description Table 95 */ 96 void acpi_build_madt(GArray *table_data, BIOSLinker *linker, 97 X86MachineState *x86ms, 98 const char *oem_id, const char *oem_table_id) 99 { 100 int i; 101 bool x2apic_mode = false; 102 MachineClass *mc = MACHINE_GET_CLASS(x86ms); 103 const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms)); 104 AcpiTable table = { .sig = "APIC", .rev = 3, .oem_id = oem_id, 105 .oem_table_id = oem_table_id }; 106 107 acpi_table_begin(&table, table_data); 108 /* Local APIC Address */ 109 build_append_int_noprefix(table_data, APIC_DEFAULT_ADDRESS, 4); 110 build_append_int_noprefix(table_data, 1 /* PCAT_COMPAT */, 4); /* Flags */ 111 112 for (i = 0; i < apic_ids->len; i++) { 113 pc_madt_cpu_entry(i, apic_ids, table_data, false); 114 if (apic_ids->cpus[i].arch_id > 254) { 115 x2apic_mode = true; 116 } 117 } 118 119 build_ioapic(table_data, ACPI_BUILD_IOAPIC_ID, IO_APIC_DEFAULT_ADDRESS, 0); 120 if (x86ms->ioapic2) { 121 build_ioapic(table_data, ACPI_BUILD_IOAPIC_ID + 1, 122 IO_APIC_SECONDARY_ADDRESS, IO_APIC_SECONDARY_IRQBASE); 123 } 124 125 if (x86ms->apic_xrupt_override) { 126 build_xrupt_override(table_data, 0, 2, 127 0 /* Flags: Conforms to the specifications of the bus */); 128 } 129 130 for (i = 1; i < 16; i++) { 131 if (!(x86ms->pci_irq_mask & (1 << i))) { 132 /* No need for a INT source override structure. */ 133 continue; 134 } 135 build_xrupt_override(table_data, i, i, 136 0xd /* Flags: Active high, Level Triggered */); 137 } 138 139 if (x2apic_mode) { 140 /* Rev 4.0, 5.2.12.13 Local x2APIC NMI Structure*/ 141 build_append_int_noprefix(table_data, 0xA, 1); /* Type */ 142 build_append_int_noprefix(table_data, 12, 1); /* Length */ 143 build_append_int_noprefix(table_data, 0, 2); /* Flags */ 144 /* ACPI Processor UID */ 145 build_append_int_noprefix(table_data, 0xFFFFFFFF /* all processors */, 146 4); 147 /* Local x2APIC LINT# */ 148 build_append_int_noprefix(table_data, 1 /* ACPI_LINT1 */, 1); 149 build_append_int_noprefix(table_data, 0, 3); /* Reserved */ 150 } else { 151 /* Rev 1.0b, 5.2.8.3.3 Local APIC NMI */ 152 build_append_int_noprefix(table_data, 4, 1); /* Type */ 153 build_append_int_noprefix(table_data, 6, 1); /* Length */ 154 /* ACPI Processor ID */ 155 build_append_int_noprefix(table_data, 0xFF /* all processors */, 1); 156 build_append_int_noprefix(table_data, 0, 2); /* Flags */ 157 /* Local APIC INTI# */ 158 build_append_int_noprefix(table_data, 1 /* ACPI_LINT1 */, 1); 159 } 160 161 acpi_table_end(linker, &table); 162 } 163 164