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                      bool has_pci)
  77 {
  78     MachineClass *mc = MACHINE_GET_CLASS(x86ms);
  79     const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms));
  80     int madt_start = table_data->len;
  81     AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(adev);
  82     bool x2apic_mode = false;
  83
  84     AcpiMultipleApicTable *madt;
  85     AcpiMadtIoApic *io_apic;
  86     AcpiMadtIntsrcovr *intsrcovr;
  87     int i;
  88
  89     madt = acpi_data_push(table_data, sizeof *madt);
  90     madt->local_apic_address = cpu_to_le32(APIC_DEFAULT_ADDRESS);
  91     madt->flags = cpu_to_le32(1);
  92
  93     for (i = 0; i < apic_ids->len; i++) {
  94         adevc->madt_cpu(adev, i, apic_ids, table_data);
  95         if (apic_ids->cpus[i].arch_id > 254) {
  96             x2apic_mode = true;
  97         }
  98     }
  99
 100     io_apic = acpi_data_push(table_data, sizeof *io_apic);
 101     io_apic->type = ACPI_APIC_IO;
 102     io_apic->length = sizeof(*io_apic);
 103     io_apic->io_apic_id = ACPI_BUILD_IOAPIC_ID;
 104     io_apic->address = cpu_to_le32(IO_APIC_DEFAULT_ADDRESS);
 105     io_apic->interrupt = cpu_to_le32(0);
 106
 107     if (x86ms->apic_xrupt_override) {
 108         intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
 109         intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
 110         intsrcovr->length = sizeof(*intsrcovr);
 111         intsrcovr->source = 0;
 112         intsrcovr->gsi    = cpu_to_le32(2);
 113         intsrcovr->flags  = cpu_to_le16(0); /* conforms to bus specifications */
 114     }
 115
 116     if (has_pci) {
 117         for (i = 1; i < 16; i++) {
 118 #define ACPI_BUILD_PCI_IRQS ((1<<5) | (1<<9) | (1<<10) | (1<<11))
 119             if (!(ACPI_BUILD_PCI_IRQS & (1 << i))) {
 120                 /* No need for a INT source override structure. */
 121                 continue;
 122             }
 123             intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
 124             intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
 125             intsrcovr->length = sizeof(*intsrcovr);
 126             intsrcovr->source = i;
 127             intsrcovr->gsi    = cpu_to_le32(i);
 128             intsrcovr->flags  = cpu_to_le16(0xd); /* active high, level triggered */
 129         }
 130     }
 131
 132     if (x2apic_mode) {
 133         AcpiMadtLocalX2ApicNmi *local_nmi;
 134
 135         local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
 136         local_nmi->type   = ACPI_APIC_LOCAL_X2APIC_NMI;
 137         local_nmi->length = sizeof(*local_nmi);
 138         local_nmi->uid    = 0xFFFFFFFF; /* all processors */
 139         local_nmi->flags  = cpu_to_le16(0);
 140         local_nmi->lint   = 1; /* ACPI_LINT1 */
 141     } else {
 142         AcpiMadtLocalNmi *local_nmi;
 143
 144         local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
 145         local_nmi->type         = ACPI_APIC_LOCAL_NMI;
 146         local_nmi->length       = sizeof(*local_nmi);
 147         local_nmi->processor_id = 0xff; /* all processors */
 148         local_nmi->flags        = cpu_to_le16(0);
 149         local_nmi->lint         = 1; /* ACPI_LINT1 */
 150     }
 151
 152     build_header(linker, table_data,
 153                  (void *)(table_data->data + madt_start), "APIC",
 154                  table_data->len - madt_start, 1, NULL, NULL);
 155 }
 156