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                      const char *oem_id, const char *oem_table_id)
  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->ioapic2) {
 108         AcpiMadtIoApic *io_apic2;
 109         io_apic2 = acpi_data_push(table_data, sizeof *io_apic);
 110         io_apic2->type = ACPI_APIC_IO;
 111         io_apic2->length = sizeof(*io_apic);
 112         io_apic2->io_apic_id = ACPI_BUILD_IOAPIC_ID + 1;
 113         io_apic2->address = cpu_to_le32(IO_APIC_SECONDARY_ADDRESS);
 114         io_apic2->interrupt = cpu_to_le32(IO_APIC_SECONDARY_IRQBASE);
 115     }
 116
 117     if (x86ms->apic_xrupt_override) {
 118         intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
 119         intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
 120         intsrcovr->length = sizeof(*intsrcovr);
 121         intsrcovr->source = 0;
 122         intsrcovr->gsi    = cpu_to_le32(2);
 123         intsrcovr->flags  = cpu_to_le16(0); /* conforms to bus specifications */
 124     }
 125
 126     for (i = 1; i < 16; i++) {
 127         if (!(x86ms->pci_irq_mask & (1 << i))) {
 128             /* No need for a INT source override structure. */
 129             continue;
 130         }
 131         intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
 132         intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
 133         intsrcovr->length = sizeof(*intsrcovr);
 134         intsrcovr->source = i;
 135         intsrcovr->gsi    = cpu_to_le32(i);
 136         intsrcovr->flags  = cpu_to_le16(0xd); /* active high, level triggered */
 137     }
 138
 139     if (x2apic_mode) {
 140         AcpiMadtLocalX2ApicNmi *local_nmi;
 141
 142         local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
 143         local_nmi->type   = ACPI_APIC_LOCAL_X2APIC_NMI;
 144         local_nmi->length = sizeof(*local_nmi);
 145         local_nmi->uid    = 0xFFFFFFFF; /* all processors */
 146         local_nmi->flags  = cpu_to_le16(0);
 147         local_nmi->lint   = 1; /* ACPI_LINT1 */
 148     } else {
 149         AcpiMadtLocalNmi *local_nmi;
 150
 151         local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
 152         local_nmi->type         = ACPI_APIC_LOCAL_NMI;
 153         local_nmi->length       = sizeof(*local_nmi);
 154         local_nmi->processor_id = 0xff; /* all processors */
 155         local_nmi->flags        = cpu_to_le16(0);
 156         local_nmi->lint         = 1; /* ACPI_LINT1 */
 157     }
 158
 159     build_header(linker, table_data,
 160                  (void *)(table_data->data + madt_start), "APIC",
 161                  table_data->len - madt_start, 1, oem_id, oem_table_id);
 162 }
 163