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