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 } 152 153