qemu/hw/i386/pc.c
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   1/*
   2 * QEMU PC System Emulator
   3 *
   4 * Copyright (c) 2003-2004 Fabrice Bellard
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25#include "qemu/osdep.h"
  26#include "qemu/units.h"
  27#include "hw/i386/x86.h"
  28#include "hw/i386/pc.h"
  29#include "hw/char/serial.h"
  30#include "hw/char/parallel.h"
  31#include "hw/i386/apic.h"
  32#include "hw/i386/topology.h"
  33#include "hw/i386/fw_cfg.h"
  34#include "hw/i386/vmport.h"
  35#include "sysemu/cpus.h"
  36#include "hw/block/fdc.h"
  37#include "hw/ide.h"
  38#include "hw/pci/pci.h"
  39#include "hw/pci/pci_bus.h"
  40#include "hw/nvram/fw_cfg.h"
  41#include "hw/timer/hpet.h"
  42#include "hw/firmware/smbios.h"
  43#include "hw/loader.h"
  44#include "elf.h"
  45#include "migration/vmstate.h"
  46#include "multiboot.h"
  47#include "hw/rtc/mc146818rtc.h"
  48#include "hw/intc/i8259.h"
  49#include "hw/dma/i8257.h"
  50#include "hw/timer/i8254.h"
  51#include "hw/input/i8042.h"
  52#include "hw/irq.h"
  53#include "hw/audio/pcspk.h"
  54#include "hw/pci/msi.h"
  55#include "hw/sysbus.h"
  56#include "sysemu/sysemu.h"
  57#include "sysemu/tcg.h"
  58#include "sysemu/numa.h"
  59#include "sysemu/kvm.h"
  60#include "sysemu/xen.h"
  61#include "sysemu/reset.h"
  62#include "sysemu/runstate.h"
  63#include "kvm/kvm_i386.h"
  64#include "hw/xen/xen.h"
  65#include "hw/xen/start_info.h"
  66#include "ui/qemu-spice.h"
  67#include "exec/memory.h"
  68#include "exec/address-spaces.h"
  69#include "sysemu/arch_init.h"
  70#include "qemu/bitmap.h"
  71#include "qemu/config-file.h"
  72#include "qemu/error-report.h"
  73#include "qemu/option.h"
  74#include "qemu/cutils.h"
  75#include "hw/acpi/acpi.h"
  76#include "hw/acpi/cpu_hotplug.h"
  77#include "hw/boards.h"
  78#include "acpi-build.h"
  79#include "hw/mem/pc-dimm.h"
  80#include "hw/mem/nvdimm.h"
  81#include "qapi/error.h"
  82#include "qapi/qapi-visit-common.h"
  83#include "qapi/visitor.h"
  84#include "hw/core/cpu.h"
  85#include "hw/usb.h"
  86#include "hw/i386/intel_iommu.h"
  87#include "hw/net/ne2000-isa.h"
  88#include "standard-headers/asm-x86/bootparam.h"
  89#include "hw/virtio/virtio-pmem-pci.h"
  90#include "hw/virtio/virtio-mem-pci.h"
  91#include "hw/mem/memory-device.h"
  92#include "sysemu/replay.h"
  93#include "qapi/qmp/qerror.h"
  94#include "e820_memory_layout.h"
  95#include "fw_cfg.h"
  96#include "trace.h"
  97#include CONFIG_DEVICES
  98
  99GlobalProperty pc_compat_5_2[] = {
 100    { "ICH9-LPC", "x-smi-cpu-hotunplug", "off" },
 101};
 102const size_t pc_compat_5_2_len = G_N_ELEMENTS(pc_compat_5_2);
 103
 104GlobalProperty pc_compat_5_1[] = {
 105    { "ICH9-LPC", "x-smi-cpu-hotplug", "off" },
 106    { TYPE_X86_CPU, "kvm-msi-ext-dest-id", "off" },
 107};
 108const size_t pc_compat_5_1_len = G_N_ELEMENTS(pc_compat_5_1);
 109
 110GlobalProperty pc_compat_5_0[] = {
 111};
 112const size_t pc_compat_5_0_len = G_N_ELEMENTS(pc_compat_5_0);
 113
 114GlobalProperty pc_compat_4_2[] = {
 115    { "mch", "smbase-smram", "off" },
 116};
 117const size_t pc_compat_4_2_len = G_N_ELEMENTS(pc_compat_4_2);
 118
 119GlobalProperty pc_compat_4_1[] = {};
 120const size_t pc_compat_4_1_len = G_N_ELEMENTS(pc_compat_4_1);
 121
 122GlobalProperty pc_compat_4_0[] = {};
 123const size_t pc_compat_4_0_len = G_N_ELEMENTS(pc_compat_4_0);
 124
 125GlobalProperty pc_compat_3_1[] = {
 126    { "intel-iommu", "dma-drain", "off" },
 127    { "Opteron_G3" "-" TYPE_X86_CPU, "rdtscp", "off" },
 128    { "Opteron_G4" "-" TYPE_X86_CPU, "rdtscp", "off" },
 129    { "Opteron_G4" "-" TYPE_X86_CPU, "npt", "off" },
 130    { "Opteron_G4" "-" TYPE_X86_CPU, "nrip-save", "off" },
 131    { "Opteron_G5" "-" TYPE_X86_CPU, "rdtscp", "off" },
 132    { "Opteron_G5" "-" TYPE_X86_CPU, "npt", "off" },
 133    { "Opteron_G5" "-" TYPE_X86_CPU, "nrip-save", "off" },
 134    { "EPYC" "-" TYPE_X86_CPU, "npt", "off" },
 135    { "EPYC" "-" TYPE_X86_CPU, "nrip-save", "off" },
 136    { "EPYC-IBPB" "-" TYPE_X86_CPU, "npt", "off" },
 137    { "EPYC-IBPB" "-" TYPE_X86_CPU, "nrip-save", "off" },
 138    { "Skylake-Client" "-" TYPE_X86_CPU,      "mpx", "on" },
 139    { "Skylake-Client-IBRS" "-" TYPE_X86_CPU, "mpx", "on" },
 140    { "Skylake-Server" "-" TYPE_X86_CPU,      "mpx", "on" },
 141    { "Skylake-Server-IBRS" "-" TYPE_X86_CPU, "mpx", "on" },
 142    { "Cascadelake-Server" "-" TYPE_X86_CPU,  "mpx", "on" },
 143    { "Icelake-Client" "-" TYPE_X86_CPU,      "mpx", "on" },
 144    { "Icelake-Server" "-" TYPE_X86_CPU,      "mpx", "on" },
 145    { "Cascadelake-Server" "-" TYPE_X86_CPU, "stepping", "5" },
 146    { TYPE_X86_CPU, "x-intel-pt-auto-level", "off" },
 147};
 148const size_t pc_compat_3_1_len = G_N_ELEMENTS(pc_compat_3_1);
 149
 150GlobalProperty pc_compat_3_0[] = {
 151    { TYPE_X86_CPU, "x-hv-synic-kvm-only", "on" },
 152    { "Skylake-Server" "-" TYPE_X86_CPU, "pku", "off" },
 153    { "Skylake-Server-IBRS" "-" TYPE_X86_CPU, "pku", "off" },
 154};
 155const size_t pc_compat_3_0_len = G_N_ELEMENTS(pc_compat_3_0);
 156
 157GlobalProperty pc_compat_2_12[] = {
 158    { TYPE_X86_CPU, "legacy-cache", "on" },
 159    { TYPE_X86_CPU, "topoext", "off" },
 160    { "EPYC-" TYPE_X86_CPU, "xlevel", "0x8000000a" },
 161    { "EPYC-IBPB-" TYPE_X86_CPU, "xlevel", "0x8000000a" },
 162};
 163const size_t pc_compat_2_12_len = G_N_ELEMENTS(pc_compat_2_12);
 164
 165GlobalProperty pc_compat_2_11[] = {
 166    { TYPE_X86_CPU, "x-migrate-smi-count", "off" },
 167    { "Skylake-Server" "-" TYPE_X86_CPU, "clflushopt", "off" },
 168};
 169const size_t pc_compat_2_11_len = G_N_ELEMENTS(pc_compat_2_11);
 170
 171GlobalProperty pc_compat_2_10[] = {
 172    { TYPE_X86_CPU, "x-hv-max-vps", "0x40" },
 173    { "i440FX-pcihost", "x-pci-hole64-fix", "off" },
 174    { "q35-pcihost", "x-pci-hole64-fix", "off" },
 175};
 176const size_t pc_compat_2_10_len = G_N_ELEMENTS(pc_compat_2_10);
 177
 178GlobalProperty pc_compat_2_9[] = {
 179    { "mch", "extended-tseg-mbytes", "0" },
 180};
 181const size_t pc_compat_2_9_len = G_N_ELEMENTS(pc_compat_2_9);
 182
 183GlobalProperty pc_compat_2_8[] = {
 184    { TYPE_X86_CPU, "tcg-cpuid", "off" },
 185    { "kvmclock", "x-mach-use-reliable-get-clock", "off" },
 186    { "ICH9-LPC", "x-smi-broadcast", "off" },
 187    { TYPE_X86_CPU, "vmware-cpuid-freq", "off" },
 188    { "Haswell-" TYPE_X86_CPU, "stepping", "1" },
 189};
 190const size_t pc_compat_2_8_len = G_N_ELEMENTS(pc_compat_2_8);
 191
 192GlobalProperty pc_compat_2_7[] = {
 193    { TYPE_X86_CPU, "l3-cache", "off" },
 194    { TYPE_X86_CPU, "full-cpuid-auto-level", "off" },
 195    { "Opteron_G3" "-" TYPE_X86_CPU, "family", "15" },
 196    { "Opteron_G3" "-" TYPE_X86_CPU, "model", "6" },
 197    { "Opteron_G3" "-" TYPE_X86_CPU, "stepping", "1" },
 198    { "isa-pcspk", "migrate", "off" },
 199};
 200const size_t pc_compat_2_7_len = G_N_ELEMENTS(pc_compat_2_7);
 201
 202GlobalProperty pc_compat_2_6[] = {
 203    { TYPE_X86_CPU, "cpuid-0xb", "off" },
 204    { "vmxnet3", "romfile", "" },
 205    { TYPE_X86_CPU, "fill-mtrr-mask", "off" },
 206    { "apic-common", "legacy-instance-id", "on", }
 207};
 208const size_t pc_compat_2_6_len = G_N_ELEMENTS(pc_compat_2_6);
 209
 210GlobalProperty pc_compat_2_5[] = {};
 211const size_t pc_compat_2_5_len = G_N_ELEMENTS(pc_compat_2_5);
 212
 213GlobalProperty pc_compat_2_4[] = {
 214    PC_CPU_MODEL_IDS("2.4.0")
 215    { "Haswell-" TYPE_X86_CPU, "abm", "off" },
 216    { "Haswell-noTSX-" TYPE_X86_CPU, "abm", "off" },
 217    { "Broadwell-" TYPE_X86_CPU, "abm", "off" },
 218    { "Broadwell-noTSX-" TYPE_X86_CPU, "abm", "off" },
 219    { "host" "-" TYPE_X86_CPU, "host-cache-info", "on" },
 220    { TYPE_X86_CPU, "check", "off" },
 221    { "qemu64" "-" TYPE_X86_CPU, "sse4a", "on" },
 222    { "qemu64" "-" TYPE_X86_CPU, "abm", "on" },
 223    { "qemu64" "-" TYPE_X86_CPU, "popcnt", "on" },
 224    { "qemu32" "-" TYPE_X86_CPU, "popcnt", "on" },
 225    { "Opteron_G2" "-" TYPE_X86_CPU, "rdtscp", "on" },
 226    { "Opteron_G3" "-" TYPE_X86_CPU, "rdtscp", "on" },
 227    { "Opteron_G4" "-" TYPE_X86_CPU, "rdtscp", "on" },
 228    { "Opteron_G5" "-" TYPE_X86_CPU, "rdtscp", "on", }
 229};
 230const size_t pc_compat_2_4_len = G_N_ELEMENTS(pc_compat_2_4);
 231
 232GlobalProperty pc_compat_2_3[] = {
 233    PC_CPU_MODEL_IDS("2.3.0")
 234    { TYPE_X86_CPU, "arat", "off" },
 235    { "qemu64" "-" TYPE_X86_CPU, "min-level", "4" },
 236    { "kvm64" "-" TYPE_X86_CPU, "min-level", "5" },
 237    { "pentium3" "-" TYPE_X86_CPU, "min-level", "2" },
 238    { "n270" "-" TYPE_X86_CPU, "min-level", "5" },
 239    { "Conroe" "-" TYPE_X86_CPU, "min-level", "4" },
 240    { "Penryn" "-" TYPE_X86_CPU, "min-level", "4" },
 241    { "Nehalem" "-" TYPE_X86_CPU, "min-level", "4" },
 242    { "n270" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 243    { "Penryn" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 244    { "Conroe" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 245    { "Nehalem" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 246    { "Westmere" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 247    { "SandyBridge" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 248    { "IvyBridge" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 249    { "Haswell" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 250    { "Haswell-noTSX" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 251    { "Broadwell" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 252    { "Broadwell-noTSX" "-" TYPE_X86_CPU, "min-xlevel", "0x8000000a" },
 253    { TYPE_X86_CPU, "kvm-no-smi-migration", "on" },
 254};
 255const size_t pc_compat_2_3_len = G_N_ELEMENTS(pc_compat_2_3);
 256
 257GlobalProperty pc_compat_2_2[] = {
 258    PC_CPU_MODEL_IDS("2.2.0")
 259    { "kvm64" "-" TYPE_X86_CPU, "vme", "off" },
 260    { "kvm32" "-" TYPE_X86_CPU, "vme", "off" },
 261    { "Conroe" "-" TYPE_X86_CPU, "vme", "off" },
 262    { "Penryn" "-" TYPE_X86_CPU, "vme", "off" },
 263    { "Nehalem" "-" TYPE_X86_CPU, "vme", "off" },
 264    { "Westmere" "-" TYPE_X86_CPU, "vme", "off" },
 265    { "SandyBridge" "-" TYPE_X86_CPU, "vme", "off" },
 266    { "Haswell" "-" TYPE_X86_CPU, "vme", "off" },
 267    { "Broadwell" "-" TYPE_X86_CPU, "vme", "off" },
 268    { "Opteron_G1" "-" TYPE_X86_CPU, "vme", "off" },
 269    { "Opteron_G2" "-" TYPE_X86_CPU, "vme", "off" },
 270    { "Opteron_G3" "-" TYPE_X86_CPU, "vme", "off" },
 271    { "Opteron_G4" "-" TYPE_X86_CPU, "vme", "off" },
 272    { "Opteron_G5" "-" TYPE_X86_CPU, "vme", "off" },
 273    { "Haswell" "-" TYPE_X86_CPU, "f16c", "off" },
 274    { "Haswell" "-" TYPE_X86_CPU, "rdrand", "off" },
 275    { "Broadwell" "-" TYPE_X86_CPU, "f16c", "off" },
 276    { "Broadwell" "-" TYPE_X86_CPU, "rdrand", "off" },
 277};
 278const size_t pc_compat_2_2_len = G_N_ELEMENTS(pc_compat_2_2);
 279
 280GlobalProperty pc_compat_2_1[] = {
 281    PC_CPU_MODEL_IDS("2.1.0")
 282    { "coreduo" "-" TYPE_X86_CPU, "vmx", "on" },
 283    { "core2duo" "-" TYPE_X86_CPU, "vmx", "on" },
 284};
 285const size_t pc_compat_2_1_len = G_N_ELEMENTS(pc_compat_2_1);
 286
 287GlobalProperty pc_compat_2_0[] = {
 288    PC_CPU_MODEL_IDS("2.0.0")
 289    { "virtio-scsi-pci", "any_layout", "off" },
 290    { "PIIX4_PM", "memory-hotplug-support", "off" },
 291    { "apic", "version", "0x11" },
 292    { "nec-usb-xhci", "superspeed-ports-first", "off" },
 293    { "nec-usb-xhci", "force-pcie-endcap", "on" },
 294    { "pci-serial", "prog_if", "0" },
 295    { "pci-serial-2x", "prog_if", "0" },
 296    { "pci-serial-4x", "prog_if", "0" },
 297    { "virtio-net-pci", "guest_announce", "off" },
 298    { "ICH9-LPC", "memory-hotplug-support", "off" },
 299    { "xio3130-downstream", COMPAT_PROP_PCP, "off" },
 300    { "ioh3420", COMPAT_PROP_PCP, "off" },
 301};
 302const size_t pc_compat_2_0_len = G_N_ELEMENTS(pc_compat_2_0);
 303
 304GlobalProperty pc_compat_1_7[] = {
 305    PC_CPU_MODEL_IDS("1.7.0")
 306    { TYPE_USB_DEVICE, "msos-desc", "no" },
 307    { "PIIX4_PM", "acpi-pci-hotplug-with-bridge-support", "off" },
 308    { "hpet", HPET_INTCAP, "4" },
 309};
 310const size_t pc_compat_1_7_len = G_N_ELEMENTS(pc_compat_1_7);
 311
 312GlobalProperty pc_compat_1_6[] = {
 313    PC_CPU_MODEL_IDS("1.6.0")
 314    { "e1000", "mitigation", "off" },
 315    { "qemu64-" TYPE_X86_CPU, "model", "2" },
 316    { "qemu32-" TYPE_X86_CPU, "model", "3" },
 317    { "i440FX-pcihost", "short_root_bus", "1" },
 318    { "q35-pcihost", "short_root_bus", "1" },
 319};
 320const size_t pc_compat_1_6_len = G_N_ELEMENTS(pc_compat_1_6);
 321
 322GlobalProperty pc_compat_1_5[] = {
 323    PC_CPU_MODEL_IDS("1.5.0")
 324    { "Conroe-" TYPE_X86_CPU, "model", "2" },
 325    { "Conroe-" TYPE_X86_CPU, "min-level", "2" },
 326    { "Penryn-" TYPE_X86_CPU, "model", "2" },
 327    { "Penryn-" TYPE_X86_CPU, "min-level", "2" },
 328    { "Nehalem-" TYPE_X86_CPU, "model", "2" },
 329    { "Nehalem-" TYPE_X86_CPU, "min-level", "2" },
 330    { "virtio-net-pci", "any_layout", "off" },
 331    { TYPE_X86_CPU, "pmu", "on" },
 332    { "i440FX-pcihost", "short_root_bus", "0" },
 333    { "q35-pcihost", "short_root_bus", "0" },
 334};
 335const size_t pc_compat_1_5_len = G_N_ELEMENTS(pc_compat_1_5);
 336
 337GlobalProperty pc_compat_1_4[] = {
 338    PC_CPU_MODEL_IDS("1.4.0")
 339    { "scsi-hd", "discard_granularity", "0" },
 340    { "scsi-cd", "discard_granularity", "0" },
 341    { "ide-hd", "discard_granularity", "0" },
 342    { "ide-cd", "discard_granularity", "0" },
 343    { "virtio-blk-pci", "discard_granularity", "0" },
 344    /* DEV_NVECTORS_UNSPECIFIED as a uint32_t string: */
 345    { "virtio-serial-pci", "vectors", "0xFFFFFFFF" },
 346    { "virtio-net-pci", "ctrl_guest_offloads", "off" },
 347    { "e1000", "romfile", "pxe-e1000.rom" },
 348    { "ne2k_pci", "romfile", "pxe-ne2k_pci.rom" },
 349    { "pcnet", "romfile", "pxe-pcnet.rom" },
 350    { "rtl8139", "romfile", "pxe-rtl8139.rom" },
 351    { "virtio-net-pci", "romfile", "pxe-virtio.rom" },
 352    { "486-" TYPE_X86_CPU, "model", "0" },
 353    { "n270" "-" TYPE_X86_CPU, "movbe", "off" },
 354    { "Westmere" "-" TYPE_X86_CPU, "pclmulqdq", "off" },
 355};
 356const size_t pc_compat_1_4_len = G_N_ELEMENTS(pc_compat_1_4);
 357
 358GSIState *pc_gsi_create(qemu_irq **irqs, bool pci_enabled)
 359{
 360    GSIState *s;
 361
 362    s = g_new0(GSIState, 1);
 363    if (kvm_ioapic_in_kernel()) {
 364        kvm_pc_setup_irq_routing(pci_enabled);
 365    }
 366    *irqs = qemu_allocate_irqs(gsi_handler, s, GSI_NUM_PINS);
 367
 368    return s;
 369}
 370
 371static void ioport80_write(void *opaque, hwaddr addr, uint64_t data,
 372                           unsigned size)
 373{
 374}
 375
 376static uint64_t ioport80_read(void *opaque, hwaddr addr, unsigned size)
 377{
 378    return 0xffffffffffffffffULL;
 379}
 380
 381/* MSDOS compatibility mode FPU exception support */
 382static void ioportF0_write(void *opaque, hwaddr addr, uint64_t data,
 383                           unsigned size)
 384{
 385    if (tcg_enabled()) {
 386        cpu_set_ignne();
 387    }
 388}
 389
 390static uint64_t ioportF0_read(void *opaque, hwaddr addr, unsigned size)
 391{
 392    return 0xffffffffffffffffULL;
 393}
 394
 395/* PC cmos mappings */
 396
 397#define REG_EQUIPMENT_BYTE          0x14
 398
 399static void cmos_init_hd(ISADevice *s, int type_ofs, int info_ofs,
 400                         int16_t cylinders, int8_t heads, int8_t sectors)
 401{
 402    rtc_set_memory(s, type_ofs, 47);
 403    rtc_set_memory(s, info_ofs, cylinders);
 404    rtc_set_memory(s, info_ofs + 1, cylinders >> 8);
 405    rtc_set_memory(s, info_ofs + 2, heads);
 406    rtc_set_memory(s, info_ofs + 3, 0xff);
 407    rtc_set_memory(s, info_ofs + 4, 0xff);
 408    rtc_set_memory(s, info_ofs + 5, 0xc0 | ((heads > 8) << 3));
 409    rtc_set_memory(s, info_ofs + 6, cylinders);
 410    rtc_set_memory(s, info_ofs + 7, cylinders >> 8);
 411    rtc_set_memory(s, info_ofs + 8, sectors);
 412}
 413
 414/* convert boot_device letter to something recognizable by the bios */
 415static int boot_device2nibble(char boot_device)
 416{
 417    switch(boot_device) {
 418    case 'a':
 419    case 'b':
 420        return 0x01; /* floppy boot */
 421    case 'c':
 422        return 0x02; /* hard drive boot */
 423    case 'd':
 424        return 0x03; /* CD-ROM boot */
 425    case 'n':
 426        return 0x04; /* Network boot */
 427    }
 428    return 0;
 429}
 430
 431static void set_boot_dev(ISADevice *s, const char *boot_device, Error **errp)
 432{
 433#define PC_MAX_BOOT_DEVICES 3
 434    int nbds, bds[3] = { 0, };
 435    int i;
 436
 437    nbds = strlen(boot_device);
 438    if (nbds > PC_MAX_BOOT_DEVICES) {
 439        error_setg(errp, "Too many boot devices for PC");
 440        return;
 441    }
 442    for (i = 0; i < nbds; i++) {
 443        bds[i] = boot_device2nibble(boot_device[i]);
 444        if (bds[i] == 0) {
 445            error_setg(errp, "Invalid boot device for PC: '%c'",
 446                       boot_device[i]);
 447            return;
 448        }
 449    }
 450    rtc_set_memory(s, 0x3d, (bds[1] << 4) | bds[0]);
 451    rtc_set_memory(s, 0x38, (bds[2] << 4) | (fd_bootchk ? 0x0 : 0x1));
 452}
 453
 454static void pc_boot_set(void *opaque, const char *boot_device, Error **errp)
 455{
 456    set_boot_dev(opaque, boot_device, errp);
 457}
 458
 459static void pc_cmos_init_floppy(ISADevice *rtc_state, ISADevice *floppy)
 460{
 461    int val, nb, i;
 462    FloppyDriveType fd_type[2] = { FLOPPY_DRIVE_TYPE_NONE,
 463                                   FLOPPY_DRIVE_TYPE_NONE };
 464
 465    /* floppy type */
 466    if (floppy) {
 467        for (i = 0; i < 2; i++) {
 468            fd_type[i] = isa_fdc_get_drive_type(floppy, i);
 469        }
 470    }
 471    val = (cmos_get_fd_drive_type(fd_type[0]) << 4) |
 472        cmos_get_fd_drive_type(fd_type[1]);
 473    rtc_set_memory(rtc_state, 0x10, val);
 474
 475    val = rtc_get_memory(rtc_state, REG_EQUIPMENT_BYTE);
 476    nb = 0;
 477    if (fd_type[0] != FLOPPY_DRIVE_TYPE_NONE) {
 478        nb++;
 479    }
 480    if (fd_type[1] != FLOPPY_DRIVE_TYPE_NONE) {
 481        nb++;
 482    }
 483    switch (nb) {
 484    case 0:
 485        break;
 486    case 1:
 487        val |= 0x01; /* 1 drive, ready for boot */
 488        break;
 489    case 2:
 490        val |= 0x41; /* 2 drives, ready for boot */
 491        break;
 492    }
 493    rtc_set_memory(rtc_state, REG_EQUIPMENT_BYTE, val);
 494}
 495
 496typedef struct pc_cmos_init_late_arg {
 497    ISADevice *rtc_state;
 498    BusState *idebus[2];
 499} pc_cmos_init_late_arg;
 500
 501typedef struct check_fdc_state {
 502    ISADevice *floppy;
 503    bool multiple;
 504} CheckFdcState;
 505
 506static int check_fdc(Object *obj, void *opaque)
 507{
 508    CheckFdcState *state = opaque;
 509    Object *fdc;
 510    uint32_t iobase;
 511    Error *local_err = NULL;
 512
 513    fdc = object_dynamic_cast(obj, TYPE_ISA_FDC);
 514    if (!fdc) {
 515        return 0;
 516    }
 517
 518    iobase = object_property_get_uint(obj, "iobase", &local_err);
 519    if (local_err || iobase != 0x3f0) {
 520        error_free(local_err);
 521        return 0;
 522    }
 523
 524    if (state->floppy) {
 525        state->multiple = true;
 526    } else {
 527        state->floppy = ISA_DEVICE(obj);
 528    }
 529    return 0;
 530}
 531
 532static const char * const fdc_container_path[] = {
 533    "/unattached", "/peripheral", "/peripheral-anon"
 534};
 535
 536/*
 537 * Locate the FDC at IO address 0x3f0, in order to configure the CMOS registers
 538 * and ACPI objects.
 539 */
 540ISADevice *pc_find_fdc0(void)
 541{
 542    int i;
 543    Object *container;
 544    CheckFdcState state = { 0 };
 545
 546    for (i = 0; i < ARRAY_SIZE(fdc_container_path); i++) {
 547        container = container_get(qdev_get_machine(), fdc_container_path[i]);
 548        object_child_foreach(container, check_fdc, &state);
 549    }
 550
 551    if (state.multiple) {
 552        warn_report("multiple floppy disk controllers with "
 553                    "iobase=0x3f0 have been found");
 554        error_printf("the one being picked for CMOS setup might not reflect "
 555                     "your intent");
 556    }
 557
 558    return state.floppy;
 559}
 560
 561static void pc_cmos_init_late(void *opaque)
 562{
 563    pc_cmos_init_late_arg *arg = opaque;
 564    ISADevice *s = arg->rtc_state;
 565    int16_t cylinders;
 566    int8_t heads, sectors;
 567    int val;
 568    int i, trans;
 569
 570    val = 0;
 571    if (arg->idebus[0] && ide_get_geometry(arg->idebus[0], 0,
 572                                           &cylinders, &heads, &sectors) >= 0) {
 573        cmos_init_hd(s, 0x19, 0x1b, cylinders, heads, sectors);
 574        val |= 0xf0;
 575    }
 576    if (arg->idebus[0] && ide_get_geometry(arg->idebus[0], 1,
 577                                           &cylinders, &heads, &sectors) >= 0) {
 578        cmos_init_hd(s, 0x1a, 0x24, cylinders, heads, sectors);
 579        val |= 0x0f;
 580    }
 581    rtc_set_memory(s, 0x12, val);
 582
 583    val = 0;
 584    for (i = 0; i < 4; i++) {
 585        /* NOTE: ide_get_geometry() returns the physical
 586           geometry.  It is always such that: 1 <= sects <= 63, 1
 587           <= heads <= 16, 1 <= cylinders <= 16383. The BIOS
 588           geometry can be different if a translation is done. */
 589        if (arg->idebus[i / 2] &&
 590            ide_get_geometry(arg->idebus[i / 2], i % 2,
 591                             &cylinders, &heads, &sectors) >= 0) {
 592            trans = ide_get_bios_chs_trans(arg->idebus[i / 2], i % 2) - 1;
 593            assert((trans & ~3) == 0);
 594            val |= trans << (i * 2);
 595        }
 596    }
 597    rtc_set_memory(s, 0x39, val);
 598
 599    pc_cmos_init_floppy(s, pc_find_fdc0());
 600
 601    qemu_unregister_reset(pc_cmos_init_late, opaque);
 602}
 603
 604void pc_cmos_init(PCMachineState *pcms,
 605                  BusState *idebus0, BusState *idebus1,
 606                  ISADevice *s)
 607{
 608    int val;
 609    static pc_cmos_init_late_arg arg;
 610    X86MachineState *x86ms = X86_MACHINE(pcms);
 611
 612    /* various important CMOS locations needed by PC/Bochs bios */
 613
 614    /* memory size */
 615    /* base memory (first MiB) */
 616    val = MIN(x86ms->below_4g_mem_size / KiB, 640);
 617    rtc_set_memory(s, 0x15, val);
 618    rtc_set_memory(s, 0x16, val >> 8);
 619    /* extended memory (next 64MiB) */
 620    if (x86ms->below_4g_mem_size > 1 * MiB) {
 621        val = (x86ms->below_4g_mem_size - 1 * MiB) / KiB;
 622    } else {
 623        val = 0;
 624    }
 625    if (val > 65535)
 626        val = 65535;
 627    rtc_set_memory(s, 0x17, val);
 628    rtc_set_memory(s, 0x18, val >> 8);
 629    rtc_set_memory(s, 0x30, val);
 630    rtc_set_memory(s, 0x31, val >> 8);
 631    /* memory between 16MiB and 4GiB */
 632    if (x86ms->below_4g_mem_size > 16 * MiB) {
 633        val = (x86ms->below_4g_mem_size - 16 * MiB) / (64 * KiB);
 634    } else {
 635        val = 0;
 636    }
 637    if (val > 65535)
 638        val = 65535;
 639    rtc_set_memory(s, 0x34, val);
 640    rtc_set_memory(s, 0x35, val >> 8);
 641    /* memory above 4GiB */
 642    val = x86ms->above_4g_mem_size / 65536;
 643    rtc_set_memory(s, 0x5b, val);
 644    rtc_set_memory(s, 0x5c, val >> 8);
 645    rtc_set_memory(s, 0x5d, val >> 16);
 646
 647    object_property_add_link(OBJECT(pcms), "rtc_state",
 648                             TYPE_ISA_DEVICE,
 649                             (Object **)&x86ms->rtc,
 650                             object_property_allow_set_link,
 651                             OBJ_PROP_LINK_STRONG);
 652    object_property_set_link(OBJECT(pcms), "rtc_state", OBJECT(s),
 653                             &error_abort);
 654
 655    set_boot_dev(s, MACHINE(pcms)->boot_order, &error_fatal);
 656
 657    val = 0;
 658    val |= 0x02; /* FPU is there */
 659    val |= 0x04; /* PS/2 mouse installed */
 660    rtc_set_memory(s, REG_EQUIPMENT_BYTE, val);
 661
 662    /* hard drives and FDC */
 663    arg.rtc_state = s;
 664    arg.idebus[0] = idebus0;
 665    arg.idebus[1] = idebus1;
 666    qemu_register_reset(pc_cmos_init_late, &arg);
 667}
 668
 669static void handle_a20_line_change(void *opaque, int irq, int level)
 670{
 671    X86CPU *cpu = opaque;
 672
 673    /* XXX: send to all CPUs ? */
 674    /* XXX: add logic to handle multiple A20 line sources */
 675    x86_cpu_set_a20(cpu, level);
 676}
 677
 678#define NE2000_NB_MAX 6
 679
 680static const int ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360,
 681                                              0x280, 0x380 };
 682static const int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
 683
 684void pc_init_ne2k_isa(ISABus *bus, NICInfo *nd)
 685{
 686    static int nb_ne2k = 0;
 687
 688    if (nb_ne2k == NE2000_NB_MAX)
 689        return;
 690    isa_ne2000_init(bus, ne2000_io[nb_ne2k],
 691                    ne2000_irq[nb_ne2k], nd);
 692    nb_ne2k++;
 693}
 694
 695void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
 696{
 697    X86CPU *cpu = opaque;
 698
 699    if (level) {
 700        cpu_interrupt(CPU(cpu), CPU_INTERRUPT_SMI);
 701    }
 702}
 703
 704/*
 705 * This function is very similar to smp_parse()
 706 * in hw/core/machine.c but includes CPU die support.
 707 */
 708void pc_smp_parse(MachineState *ms, QemuOpts *opts)
 709{
 710    X86MachineState *x86ms = X86_MACHINE(ms);
 711
 712    if (opts) {
 713        unsigned cpus    = qemu_opt_get_number(opts, "cpus", 0);
 714        unsigned sockets = qemu_opt_get_number(opts, "sockets", 0);
 715        unsigned dies = qemu_opt_get_number(opts, "dies", 1);
 716        unsigned cores   = qemu_opt_get_number(opts, "cores", 0);
 717        unsigned threads = qemu_opt_get_number(opts, "threads", 0);
 718
 719        /* compute missing values, prefer sockets over cores over threads */
 720        if (cpus == 0 || sockets == 0) {
 721            cores = cores > 0 ? cores : 1;
 722            threads = threads > 0 ? threads : 1;
 723            if (cpus == 0) {
 724                sockets = sockets > 0 ? sockets : 1;
 725                cpus = cores * threads * dies * sockets;
 726            } else {
 727                ms->smp.max_cpus =
 728                        qemu_opt_get_number(opts, "maxcpus", cpus);
 729                sockets = ms->smp.max_cpus / (cores * threads * dies);
 730            }
 731        } else if (cores == 0) {
 732            threads = threads > 0 ? threads : 1;
 733            cores = cpus / (sockets * dies * threads);
 734            cores = cores > 0 ? cores : 1;
 735        } else if (threads == 0) {
 736            threads = cpus / (cores * dies * sockets);
 737            threads = threads > 0 ? threads : 1;
 738        } else if (sockets * dies * cores * threads < cpus) {
 739            error_report("cpu topology: "
 740                         "sockets (%u) * dies (%u) * cores (%u) * threads (%u) < "
 741                         "smp_cpus (%u)",
 742                         sockets, dies, cores, threads, cpus);
 743            exit(1);
 744        }
 745
 746        ms->smp.max_cpus =
 747                qemu_opt_get_number(opts, "maxcpus", cpus);
 748
 749        if (ms->smp.max_cpus < cpus) {
 750            error_report("maxcpus must be equal to or greater than smp");
 751            exit(1);
 752        }
 753
 754        if (sockets * dies * cores * threads != ms->smp.max_cpus) {
 755            error_report("Invalid CPU topology deprecated: "
 756                         "sockets (%u) * dies (%u) * cores (%u) * threads (%u) "
 757                         "!= maxcpus (%u)",
 758                         sockets, dies, cores, threads,
 759                         ms->smp.max_cpus);
 760            exit(1);
 761        }
 762
 763        ms->smp.cpus = cpus;
 764        ms->smp.cores = cores;
 765        ms->smp.threads = threads;
 766        ms->smp.sockets = sockets;
 767        x86ms->smp_dies = dies;
 768    }
 769
 770    if (ms->smp.cpus > 1) {
 771        Error *blocker = NULL;
 772        error_setg(&blocker, QERR_REPLAY_NOT_SUPPORTED, "smp");
 773        replay_add_blocker(blocker);
 774    }
 775}
 776
 777static
 778void pc_machine_done(Notifier *notifier, void *data)
 779{
 780    PCMachineState *pcms = container_of(notifier,
 781                                        PCMachineState, machine_done);
 782    X86MachineState *x86ms = X86_MACHINE(pcms);
 783
 784    /* set the number of CPUs */
 785    x86_rtc_set_cpus_count(x86ms->rtc, x86ms->boot_cpus);
 786
 787    fw_cfg_add_extra_pci_roots(pcms->bus, x86ms->fw_cfg);
 788
 789    acpi_setup();
 790    if (x86ms->fw_cfg) {
 791        fw_cfg_build_smbios(MACHINE(pcms), x86ms->fw_cfg);
 792        fw_cfg_build_feature_control(MACHINE(pcms), x86ms->fw_cfg);
 793        /* update FW_CFG_NB_CPUS to account for -device added CPUs */
 794        fw_cfg_modify_i16(x86ms->fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
 795    }
 796
 797
 798    if (x86ms->apic_id_limit > 255 && !xen_enabled() &&
 799        !kvm_irqchip_in_kernel()) {
 800        error_report("current -smp configuration requires kernel "
 801                     "irqchip support.");
 802        exit(EXIT_FAILURE);
 803    }
 804}
 805
 806void pc_guest_info_init(PCMachineState *pcms)
 807{
 808    int i;
 809    MachineState *ms = MACHINE(pcms);
 810    X86MachineState *x86ms = X86_MACHINE(pcms);
 811
 812    x86ms->apic_xrupt_override = true;
 813    pcms->numa_nodes = ms->numa_state->num_nodes;
 814    pcms->node_mem = g_malloc0(pcms->numa_nodes *
 815                                    sizeof *pcms->node_mem);
 816    for (i = 0; i < ms->numa_state->num_nodes; i++) {
 817        pcms->node_mem[i] = ms->numa_state->nodes[i].node_mem;
 818    }
 819
 820    pcms->machine_done.notify = pc_machine_done;
 821    qemu_add_machine_init_done_notifier(&pcms->machine_done);
 822}
 823
 824/* setup pci memory address space mapping into system address space */
 825void pc_pci_as_mapping_init(Object *owner, MemoryRegion *system_memory,
 826                            MemoryRegion *pci_address_space)
 827{
 828    /* Set to lower priority than RAM */
 829    memory_region_add_subregion_overlap(system_memory, 0x0,
 830                                        pci_address_space, -1);
 831}
 832
 833void xen_load_linux(PCMachineState *pcms)
 834{
 835    int i;
 836    FWCfgState *fw_cfg;
 837    PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
 838    X86MachineState *x86ms = X86_MACHINE(pcms);
 839
 840    assert(MACHINE(pcms)->kernel_filename != NULL);
 841
 842    fw_cfg = fw_cfg_init_io(FW_CFG_IO_BASE);
 843    fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
 844    rom_set_fw(fw_cfg);
 845
 846    x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
 847                   pcmc->pvh_enabled, pcmc->linuxboot_dma_enabled);
 848    for (i = 0; i < nb_option_roms; i++) {
 849        assert(!strcmp(option_rom[i].name, "linuxboot.bin") ||
 850               !strcmp(option_rom[i].name, "linuxboot_dma.bin") ||
 851               !strcmp(option_rom[i].name, "pvh.bin") ||
 852               !strcmp(option_rom[i].name, "multiboot.bin"));
 853        rom_add_option(option_rom[i].name, option_rom[i].bootindex);
 854    }
 855    x86ms->fw_cfg = fw_cfg;
 856}
 857
 858void pc_memory_init(PCMachineState *pcms,
 859                    MemoryRegion *system_memory,
 860                    MemoryRegion *rom_memory,
 861                    MemoryRegion **ram_memory)
 862{
 863    int linux_boot, i;
 864    MemoryRegion *option_rom_mr;
 865    MemoryRegion *ram_below_4g, *ram_above_4g;
 866    FWCfgState *fw_cfg;
 867    MachineState *machine = MACHINE(pcms);
 868    MachineClass *mc = MACHINE_GET_CLASS(machine);
 869    PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
 870    X86MachineState *x86ms = X86_MACHINE(pcms);
 871
 872    assert(machine->ram_size == x86ms->below_4g_mem_size +
 873                                x86ms->above_4g_mem_size);
 874
 875    linux_boot = (machine->kernel_filename != NULL);
 876
 877    /*
 878     * Split single memory region and use aliases to address portions of it,
 879     * done for backwards compatibility with older qemus.
 880     */
 881    *ram_memory = machine->ram;
 882    ram_below_4g = g_malloc(sizeof(*ram_below_4g));
 883    memory_region_init_alias(ram_below_4g, NULL, "ram-below-4g", machine->ram,
 884                             0, x86ms->below_4g_mem_size);
 885    memory_region_add_subregion(system_memory, 0, ram_below_4g);
 886    e820_add_entry(0, x86ms->below_4g_mem_size, E820_RAM);
 887    if (x86ms->above_4g_mem_size > 0) {
 888        ram_above_4g = g_malloc(sizeof(*ram_above_4g));
 889        memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g",
 890                                 machine->ram,
 891                                 x86ms->below_4g_mem_size,
 892                                 x86ms->above_4g_mem_size);
 893        memory_region_add_subregion(system_memory, 0x100000000ULL,
 894                                    ram_above_4g);
 895        e820_add_entry(0x100000000ULL, x86ms->above_4g_mem_size, E820_RAM);
 896    }
 897
 898    if (!pcmc->has_reserved_memory &&
 899        (machine->ram_slots ||
 900         (machine->maxram_size > machine->ram_size))) {
 901
 902        error_report("\"-memory 'slots|maxmem'\" is not supported by: %s",
 903                     mc->name);
 904        exit(EXIT_FAILURE);
 905    }
 906
 907    /* always allocate the device memory information */
 908    machine->device_memory = g_malloc0(sizeof(*machine->device_memory));
 909
 910    /* initialize device memory address space */
 911    if (pcmc->has_reserved_memory &&
 912        (machine->ram_size < machine->maxram_size)) {
 913        ram_addr_t device_mem_size = machine->maxram_size - machine->ram_size;
 914
 915        if (machine->ram_slots > ACPI_MAX_RAM_SLOTS) {
 916            error_report("unsupported amount of memory slots: %"PRIu64,
 917                         machine->ram_slots);
 918            exit(EXIT_FAILURE);
 919        }
 920
 921        if (QEMU_ALIGN_UP(machine->maxram_size,
 922                          TARGET_PAGE_SIZE) != machine->maxram_size) {
 923            error_report("maximum memory size must by aligned to multiple of "
 924                         "%d bytes", TARGET_PAGE_SIZE);
 925            exit(EXIT_FAILURE);
 926        }
 927
 928        machine->device_memory->base =
 929            ROUND_UP(0x100000000ULL + x86ms->above_4g_mem_size, 1 * GiB);
 930
 931        if (pcmc->enforce_aligned_dimm) {
 932            /* size device region assuming 1G page max alignment per slot */
 933            device_mem_size += (1 * GiB) * machine->ram_slots;
 934        }
 935
 936        if ((machine->device_memory->base + device_mem_size) <
 937            device_mem_size) {
 938            error_report("unsupported amount of maximum memory: " RAM_ADDR_FMT,
 939                         machine->maxram_size);
 940            exit(EXIT_FAILURE);
 941        }
 942
 943        memory_region_init(&machine->device_memory->mr, OBJECT(pcms),
 944                           "device-memory", device_mem_size);
 945        memory_region_add_subregion(system_memory, machine->device_memory->base,
 946                                    &machine->device_memory->mr);
 947    }
 948
 949    /* Initialize PC system firmware */
 950    pc_system_firmware_init(pcms, rom_memory);
 951
 952    option_rom_mr = g_malloc(sizeof(*option_rom_mr));
 953    memory_region_init_ram(option_rom_mr, NULL, "pc.rom", PC_ROM_SIZE,
 954                           &error_fatal);
 955    if (pcmc->pci_enabled) {
 956        memory_region_set_readonly(option_rom_mr, true);
 957    }
 958    memory_region_add_subregion_overlap(rom_memory,
 959                                        PC_ROM_MIN_VGA,
 960                                        option_rom_mr,
 961                                        1);
 962
 963    fw_cfg = fw_cfg_arch_create(machine,
 964                                x86ms->boot_cpus, x86ms->apic_id_limit);
 965
 966    rom_set_fw(fw_cfg);
 967
 968    if (pcmc->has_reserved_memory && machine->device_memory->base) {
 969        uint64_t *val = g_malloc(sizeof(*val));
 970        PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
 971        uint64_t res_mem_end = machine->device_memory->base;
 972
 973        if (!pcmc->broken_reserved_end) {
 974            res_mem_end += memory_region_size(&machine->device_memory->mr);
 975        }
 976        *val = cpu_to_le64(ROUND_UP(res_mem_end, 1 * GiB));
 977        fw_cfg_add_file(fw_cfg, "etc/reserved-memory-end", val, sizeof(*val));
 978    }
 979
 980    if (linux_boot) {
 981        x86_load_linux(x86ms, fw_cfg, pcmc->acpi_data_size,
 982                       pcmc->pvh_enabled, pcmc->linuxboot_dma_enabled);
 983    }
 984
 985    for (i = 0; i < nb_option_roms; i++) {
 986        rom_add_option(option_rom[i].name, option_rom[i].bootindex);
 987    }
 988    x86ms->fw_cfg = fw_cfg;
 989
 990    /* Init default IOAPIC address space */
 991    x86ms->ioapic_as = &address_space_memory;
 992
 993    /* Init ACPI memory hotplug IO base address */
 994    pcms->memhp_io_base = ACPI_MEMORY_HOTPLUG_BASE;
 995}
 996
 997/*
 998 * The 64bit pci hole starts after "above 4G RAM" and
 999 * potentially the space reserved for memory hotplug.
1000 */
1001uint64_t pc_pci_hole64_start(void)
1002{
1003    PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
1004    PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
1005    MachineState *ms = MACHINE(pcms);
1006    X86MachineState *x86ms = X86_MACHINE(pcms);
1007    uint64_t hole64_start = 0;
1008
1009    if (pcmc->has_reserved_memory && ms->device_memory->base) {
1010        hole64_start = ms->device_memory->base;
1011        if (!pcmc->broken_reserved_end) {
1012            hole64_start += memory_region_size(&ms->device_memory->mr);
1013        }
1014    } else {
1015        hole64_start = 0x100000000ULL + x86ms->above_4g_mem_size;
1016    }
1017
1018    return ROUND_UP(hole64_start, 1 * GiB);
1019}
1020
1021DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus)
1022{
1023    DeviceState *dev = NULL;
1024
1025    rom_set_order_override(FW_CFG_ORDER_OVERRIDE_VGA);
1026    if (pci_bus) {
1027        PCIDevice *pcidev = pci_vga_init(pci_bus);
1028        dev = pcidev ? &pcidev->qdev : NULL;
1029    } else if (isa_bus) {
1030        ISADevice *isadev = isa_vga_init(isa_bus);
1031        dev = isadev ? DEVICE(isadev) : NULL;
1032    }
1033    rom_reset_order_override();
1034    return dev;
1035}
1036
1037static const MemoryRegionOps ioport80_io_ops = {
1038    .write = ioport80_write,
1039    .read = ioport80_read,
1040    .endianness = DEVICE_NATIVE_ENDIAN,
1041    .impl = {
1042        .min_access_size = 1,
1043        .max_access_size = 1,
1044    },
1045};
1046
1047static const MemoryRegionOps ioportF0_io_ops = {
1048    .write = ioportF0_write,
1049    .read = ioportF0_read,
1050    .endianness = DEVICE_NATIVE_ENDIAN,
1051    .impl = {
1052        .min_access_size = 1,
1053        .max_access_size = 1,
1054    },
1055};
1056
1057static void pc_superio_init(ISABus *isa_bus, bool create_fdctrl, bool no_vmport)
1058{
1059    int i;
1060    DriveInfo *fd[MAX_FD];
1061    qemu_irq *a20_line;
1062    ISADevice *fdc, *i8042, *port92, *vmmouse;
1063
1064    serial_hds_isa_init(isa_bus, 0, MAX_ISA_SERIAL_PORTS);
1065    parallel_hds_isa_init(isa_bus, MAX_PARALLEL_PORTS);
1066
1067    for (i = 0; i < MAX_FD; i++) {
1068        fd[i] = drive_get(IF_FLOPPY, 0, i);
1069        create_fdctrl |= !!fd[i];
1070    }
1071    if (create_fdctrl) {
1072        fdc = isa_new(TYPE_ISA_FDC);
1073        if (fdc) {
1074            isa_realize_and_unref(fdc, isa_bus, &error_fatal);
1075            isa_fdc_init_drives(fdc, fd);
1076        }
1077    }
1078
1079    i8042 = isa_create_simple(isa_bus, "i8042");
1080    if (!no_vmport) {
1081        isa_create_simple(isa_bus, TYPE_VMPORT);
1082        vmmouse = isa_try_new("vmmouse");
1083    } else {
1084        vmmouse = NULL;
1085    }
1086    if (vmmouse) {
1087        object_property_set_link(OBJECT(vmmouse), "i8042", OBJECT(i8042),
1088                                 &error_abort);
1089        isa_realize_and_unref(vmmouse, isa_bus, &error_fatal);
1090    }
1091    port92 = isa_create_simple(isa_bus, TYPE_PORT92);
1092
1093    a20_line = qemu_allocate_irqs(handle_a20_line_change, first_cpu, 2);
1094    i8042_setup_a20_line(i8042, a20_line[0]);
1095    qdev_connect_gpio_out_named(DEVICE(port92),
1096                                PORT92_A20_LINE, 0, a20_line[1]);
1097    g_free(a20_line);
1098}
1099
1100void pc_basic_device_init(struct PCMachineState *pcms,
1101                          ISABus *isa_bus, qemu_irq *gsi,
1102                          ISADevice **rtc_state,
1103                          bool create_fdctrl,
1104                          uint32_t hpet_irqs)
1105{
1106    int i;
1107    DeviceState *hpet = NULL;
1108    int pit_isa_irq = 0;
1109    qemu_irq pit_alt_irq = NULL;
1110    qemu_irq rtc_irq = NULL;
1111    ISADevice *pit = NULL;
1112    MemoryRegion *ioport80_io = g_new(MemoryRegion, 1);
1113    MemoryRegion *ioportF0_io = g_new(MemoryRegion, 1);
1114
1115    memory_region_init_io(ioport80_io, NULL, &ioport80_io_ops, NULL, "ioport80", 1);
1116    memory_region_add_subregion(isa_bus->address_space_io, 0x80, ioport80_io);
1117
1118    memory_region_init_io(ioportF0_io, NULL, &ioportF0_io_ops, NULL, "ioportF0", 1);
1119    memory_region_add_subregion(isa_bus->address_space_io, 0xf0, ioportF0_io);
1120
1121    /*
1122     * Check if an HPET shall be created.
1123     *
1124     * Without KVM_CAP_PIT_STATE2, we cannot switch off the in-kernel PIT
1125     * when the HPET wants to take over. Thus we have to disable the latter.
1126     */
1127    if (pcms->hpet_enabled && (!kvm_irqchip_in_kernel() ||
1128                               kvm_has_pit_state2())) {
1129        hpet = qdev_try_new(TYPE_HPET);
1130        if (!hpet) {
1131            error_report("couldn't create HPET device");
1132            exit(1);
1133        }
1134        /*
1135         * For pc-piix-*, hpet's intcap is always IRQ2. For pc-q35-1.7 and
1136         * earlier, use IRQ2 for compat. Otherwise, use IRQ16~23, IRQ8 and
1137         * IRQ2.
1138         */
1139        uint8_t compat = object_property_get_uint(OBJECT(hpet),
1140                HPET_INTCAP, NULL);
1141        if (!compat) {
1142            qdev_prop_set_uint32(hpet, HPET_INTCAP, hpet_irqs);
1143        }
1144        sysbus_realize_and_unref(SYS_BUS_DEVICE(hpet), &error_fatal);
1145        sysbus_mmio_map(SYS_BUS_DEVICE(hpet), 0, HPET_BASE);
1146
1147        for (i = 0; i < GSI_NUM_PINS; i++) {
1148            sysbus_connect_irq(SYS_BUS_DEVICE(hpet), i, gsi[i]);
1149        }
1150        pit_isa_irq = -1;
1151        pit_alt_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_PIT_INT);
1152        rtc_irq = qdev_get_gpio_in(hpet, HPET_LEGACY_RTC_INT);
1153    }
1154    *rtc_state = mc146818_rtc_init(isa_bus, 2000, rtc_irq);
1155
1156    qemu_register_boot_set(pc_boot_set, *rtc_state);
1157
1158    if (!xen_enabled() && pcms->pit_enabled) {
1159        if (kvm_pit_in_kernel()) {
1160            pit = kvm_pit_init(isa_bus, 0x40);
1161        } else {
1162            pit = i8254_pit_init(isa_bus, 0x40, pit_isa_irq, pit_alt_irq);
1163        }
1164        if (hpet) {
1165            /* connect PIT to output control line of the HPET */
1166            qdev_connect_gpio_out(hpet, 0, qdev_get_gpio_in(DEVICE(pit), 0));
1167        }
1168        pcspk_init(pcms->pcspk, isa_bus, pit);
1169    }
1170
1171    i8257_dma_init(isa_bus, 0);
1172
1173    /* Super I/O */
1174    pc_superio_init(isa_bus, create_fdctrl, pcms->vmport != ON_OFF_AUTO_ON);
1175}
1176
1177void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus)
1178{
1179    int i;
1180
1181    rom_set_order_override(FW_CFG_ORDER_OVERRIDE_NIC);
1182    for (i = 0; i < nb_nics; i++) {
1183        NICInfo *nd = &nd_table[i];
1184        const char *model = nd->model ? nd->model : pcmc->default_nic_model;
1185
1186        if (g_str_equal(model, "ne2k_isa")) {
1187            pc_init_ne2k_isa(isa_bus, nd);
1188        } else {
1189            pci_nic_init_nofail(nd, pci_bus, model, NULL);
1190        }
1191    }
1192    rom_reset_order_override();
1193}
1194
1195void pc_i8259_create(ISABus *isa_bus, qemu_irq *i8259_irqs)
1196{
1197    qemu_irq *i8259;
1198
1199    if (kvm_pic_in_kernel()) {
1200        i8259 = kvm_i8259_init(isa_bus);
1201    } else if (xen_enabled()) {
1202        i8259 = xen_interrupt_controller_init();
1203    } else {
1204        i8259 = i8259_init(isa_bus, x86_allocate_cpu_irq());
1205    }
1206
1207    for (size_t i = 0; i < ISA_NUM_IRQS; i++) {
1208        i8259_irqs[i] = i8259[i];
1209    }
1210
1211    g_free(i8259);
1212}
1213
1214static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
1215                               Error **errp)
1216{
1217    const PCMachineState *pcms = PC_MACHINE(hotplug_dev);
1218    const X86MachineState *x86ms = X86_MACHINE(hotplug_dev);
1219    const PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
1220    const MachineState *ms = MACHINE(hotplug_dev);
1221    const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
1222    const uint64_t legacy_align = TARGET_PAGE_SIZE;
1223    Error *local_err = NULL;
1224
1225    /*
1226     * When -no-acpi is used with Q35 machine type, no ACPI is built,
1227     * but pcms->acpi_dev is still created. Check !acpi_enabled in
1228     * addition to cover this case.
1229     */
1230    if (!x86ms->acpi_dev || !x86_machine_is_acpi_enabled(x86ms)) {
1231        error_setg(errp,
1232                   "memory hotplug is not enabled: missing acpi device or acpi disabled");
1233        return;
1234    }
1235
1236    if (is_nvdimm && !ms->nvdimms_state->is_enabled) {
1237        error_setg(errp, "nvdimm is not enabled: missing 'nvdimm' in '-M'");
1238        return;
1239    }
1240
1241    hotplug_handler_pre_plug(x86ms->acpi_dev, dev, &local_err);
1242    if (local_err) {
1243        error_propagate(errp, local_err);
1244        return;
1245    }
1246
1247    pc_dimm_pre_plug(PC_DIMM(dev), MACHINE(hotplug_dev),
1248                     pcmc->enforce_aligned_dimm ? NULL : &legacy_align, errp);
1249}
1250
1251static void pc_memory_plug(HotplugHandler *hotplug_dev,
1252                           DeviceState *dev, Error **errp)
1253{
1254    PCMachineState *pcms = PC_MACHINE(hotplug_dev);
1255    X86MachineState *x86ms = X86_MACHINE(hotplug_dev);
1256    MachineState *ms = MACHINE(hotplug_dev);
1257    bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
1258
1259    pc_dimm_plug(PC_DIMM(dev), MACHINE(pcms));
1260
1261    if (is_nvdimm) {
1262        nvdimm_plug(ms->nvdimms_state);
1263    }
1264
1265    hotplug_handler_plug(x86ms->acpi_dev, dev, &error_abort);
1266}
1267
1268static void pc_memory_unplug_request(HotplugHandler *hotplug_dev,
1269                                     DeviceState *dev, Error **errp)
1270{
1271    X86MachineState *x86ms = X86_MACHINE(hotplug_dev);
1272
1273    /*
1274     * When -no-acpi is used with Q35 machine type, no ACPI is built,
1275     * but pcms->acpi_dev is still created. Check !acpi_enabled in
1276     * addition to cover this case.
1277     */
1278    if (!x86ms->acpi_dev || !x86_machine_is_acpi_enabled(x86ms)) {
1279        error_setg(errp,
1280                   "memory hotplug is not enabled: missing acpi device or acpi disabled");
1281        return;
1282    }
1283
1284    if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
1285        error_setg(errp, "nvdimm device hot unplug is not supported yet.");
1286        return;
1287    }
1288
1289    hotplug_handler_unplug_request(x86ms->acpi_dev, dev,
1290                                   errp);
1291}
1292
1293static void pc_memory_unplug(HotplugHandler *hotplug_dev,
1294                             DeviceState *dev, Error **errp)
1295{
1296    PCMachineState *pcms = PC_MACHINE(hotplug_dev);
1297    X86MachineState *x86ms = X86_MACHINE(hotplug_dev);
1298    Error *local_err = NULL;
1299
1300    hotplug_handler_unplug(x86ms->acpi_dev, dev, &local_err);
1301    if (local_err) {
1302        goto out;
1303    }
1304
1305    pc_dimm_unplug(PC_DIMM(dev), MACHINE(pcms));
1306    qdev_unrealize(dev);
1307 out:
1308    error_propagate(errp, local_err);
1309}
1310
1311static void pc_virtio_md_pci_pre_plug(HotplugHandler *hotplug_dev,
1312                                      DeviceState *dev, Error **errp)
1313{
1314    HotplugHandler *hotplug_dev2 = qdev_get_bus_hotplug_handler(dev);
1315    Error *local_err = NULL;
1316
1317    if (!hotplug_dev2 && dev->hotplugged) {
1318        /*
1319         * Without a bus hotplug handler, we cannot control the plug/unplug
1320         * order. We should never reach this point when hotplugging on x86,
1321         * however, better add a safety net.
1322         */
1323        error_setg(errp, "hotplug of virtio based memory devices not supported"
1324                   " on this bus.");
1325        return;
1326    }
1327    /*
1328     * First, see if we can plug this memory device at all. If that
1329     * succeeds, branch of to the actual hotplug handler.
1330     */
1331    memory_device_pre_plug(MEMORY_DEVICE(dev), MACHINE(hotplug_dev), NULL,
1332                           &local_err);
1333    if (!local_err && hotplug_dev2) {
1334        hotplug_handler_pre_plug(hotplug_dev2, dev, &local_err);
1335    }
1336    error_propagate(errp, local_err);
1337}
1338
1339static void pc_virtio_md_pci_plug(HotplugHandler *hotplug_dev,
1340                                  DeviceState *dev, Error **errp)
1341{
1342    HotplugHandler *hotplug_dev2 = qdev_get_bus_hotplug_handler(dev);
1343    Error *local_err = NULL;
1344
1345    /*
1346     * Plug the memory device first and then branch off to the actual
1347     * hotplug handler. If that one fails, we can easily undo the memory
1348     * device bits.
1349     */
1350    memory_device_plug(MEMORY_DEVICE(dev), MACHINE(hotplug_dev));
1351    if (hotplug_dev2) {
1352        hotplug_handler_plug(hotplug_dev2, dev, &local_err);
1353        if (local_err) {
1354            memory_device_unplug(MEMORY_DEVICE(dev), MACHINE(hotplug_dev));
1355        }
1356    }
1357    error_propagate(errp, local_err);
1358}
1359
1360static void pc_virtio_md_pci_unplug_request(HotplugHandler *hotplug_dev,
1361                                            DeviceState *dev, Error **errp)
1362{
1363    /* We don't support hot unplug of virtio based memory devices */
1364    error_setg(errp, "virtio based memory devices cannot be unplugged.");
1365}
1366
1367static void pc_virtio_md_pci_unplug(HotplugHandler *hotplug_dev,
1368                                    DeviceState *dev, Error **errp)
1369{
1370    /* We don't support hot unplug of virtio based memory devices */
1371}
1372
1373static void pc_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
1374                                          DeviceState *dev, Error **errp)
1375{
1376    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
1377        pc_memory_pre_plug(hotplug_dev, dev, errp);
1378    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
1379        x86_cpu_pre_plug(hotplug_dev, dev, errp);
1380    } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_PMEM_PCI) ||
1381               object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI)) {
1382        pc_virtio_md_pci_pre_plug(hotplug_dev, dev, errp);
1383    }
1384}
1385
1386static void pc_machine_device_plug_cb(HotplugHandler *hotplug_dev,
1387                                      DeviceState *dev, Error **errp)
1388{
1389    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
1390        pc_memory_plug(hotplug_dev, dev, errp);
1391    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
1392        x86_cpu_plug(hotplug_dev, dev, errp);
1393    } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_PMEM_PCI) ||
1394               object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI)) {
1395        pc_virtio_md_pci_plug(hotplug_dev, dev, errp);
1396    }
1397}
1398
1399static void pc_machine_device_unplug_request_cb(HotplugHandler *hotplug_dev,
1400                                                DeviceState *dev, Error **errp)
1401{
1402    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
1403        pc_memory_unplug_request(hotplug_dev, dev, errp);
1404    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
1405        x86_cpu_unplug_request_cb(hotplug_dev, dev, errp);
1406    } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_PMEM_PCI) ||
1407               object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI)) {
1408        pc_virtio_md_pci_unplug_request(hotplug_dev, dev, errp);
1409    } else {
1410        error_setg(errp, "acpi: device unplug request for not supported device"
1411                   " type: %s", object_get_typename(OBJECT(dev)));
1412    }
1413}
1414
1415static void pc_machine_device_unplug_cb(HotplugHandler *hotplug_dev,
1416                                        DeviceState *dev, Error **errp)
1417{
1418    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
1419        pc_memory_unplug(hotplug_dev, dev, errp);
1420    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
1421        x86_cpu_unplug_cb(hotplug_dev, dev, errp);
1422    } else if (object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_PMEM_PCI) ||
1423               object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI)) {
1424        pc_virtio_md_pci_unplug(hotplug_dev, dev, errp);
1425    } else {
1426        error_setg(errp, "acpi: device unplug for not supported device"
1427                   " type: %s", object_get_typename(OBJECT(dev)));
1428    }
1429}
1430
1431static HotplugHandler *pc_get_hotplug_handler(MachineState *machine,
1432                                             DeviceState *dev)
1433{
1434    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) ||
1435        object_dynamic_cast(OBJECT(dev), TYPE_CPU) ||
1436        object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_PMEM_PCI) ||
1437        object_dynamic_cast(OBJECT(dev), TYPE_VIRTIO_MEM_PCI)) {
1438        return HOTPLUG_HANDLER(machine);
1439    }
1440
1441    return NULL;
1442}
1443
1444static void
1445pc_machine_get_device_memory_region_size(Object *obj, Visitor *v,
1446                                         const char *name, void *opaque,
1447                                         Error **errp)
1448{
1449    MachineState *ms = MACHINE(obj);
1450    int64_t value = 0;
1451
1452    if (ms->device_memory) {
1453        value = memory_region_size(&ms->device_memory->mr);
1454    }
1455
1456    visit_type_int(v, name, &value, errp);
1457}
1458
1459static void pc_machine_get_vmport(Object *obj, Visitor *v, const char *name,
1460                                  void *opaque, Error **errp)
1461{
1462    PCMachineState *pcms = PC_MACHINE(obj);
1463    OnOffAuto vmport = pcms->vmport;
1464
1465    visit_type_OnOffAuto(v, name, &vmport, errp);
1466}
1467
1468static void pc_machine_set_vmport(Object *obj, Visitor *v, const char *name,
1469                                  void *opaque, Error **errp)
1470{
1471    PCMachineState *pcms = PC_MACHINE(obj);
1472
1473    visit_type_OnOffAuto(v, name, &pcms->vmport, errp);
1474}
1475
1476static bool pc_machine_get_smbus(Object *obj, Error **errp)
1477{
1478    PCMachineState *pcms = PC_MACHINE(obj);
1479
1480    return pcms->smbus_enabled;
1481}
1482
1483static void pc_machine_set_smbus(Object *obj, bool value, Error **errp)
1484{
1485    PCMachineState *pcms = PC_MACHINE(obj);
1486
1487    pcms->smbus_enabled = value;
1488}
1489
1490static bool pc_machine_get_sata(Object *obj, Error **errp)
1491{
1492    PCMachineState *pcms = PC_MACHINE(obj);
1493
1494    return pcms->sata_enabled;
1495}
1496
1497static void pc_machine_set_sata(Object *obj, bool value, Error **errp)
1498{
1499    PCMachineState *pcms = PC_MACHINE(obj);
1500
1501    pcms->sata_enabled = value;
1502}
1503
1504static bool pc_machine_get_pit(Object *obj, Error **errp)
1505{
1506    PCMachineState *pcms = PC_MACHINE(obj);
1507
1508    return pcms->pit_enabled;
1509}
1510
1511static void pc_machine_set_pit(Object *obj, bool value, Error **errp)
1512{
1513    PCMachineState *pcms = PC_MACHINE(obj);
1514
1515    pcms->pit_enabled = value;
1516}
1517
1518static bool pc_machine_get_hpet(Object *obj, Error **errp)
1519{
1520    PCMachineState *pcms = PC_MACHINE(obj);
1521
1522    return pcms->hpet_enabled;
1523}
1524
1525static void pc_machine_set_hpet(Object *obj, bool value, Error **errp)
1526{
1527    PCMachineState *pcms = PC_MACHINE(obj);
1528
1529    pcms->hpet_enabled = value;
1530}
1531
1532static void pc_machine_get_max_ram_below_4g(Object *obj, Visitor *v,
1533                                            const char *name, void *opaque,
1534                                            Error **errp)
1535{
1536    PCMachineState *pcms = PC_MACHINE(obj);
1537    uint64_t value = pcms->max_ram_below_4g;
1538
1539    visit_type_size(v, name, &value, errp);
1540}
1541
1542static void pc_machine_set_max_ram_below_4g(Object *obj, Visitor *v,
1543                                            const char *name, void *opaque,
1544                                            Error **errp)
1545{
1546    PCMachineState *pcms = PC_MACHINE(obj);
1547    uint64_t value;
1548
1549    if (!visit_type_size(v, name, &value, errp)) {
1550        return;
1551    }
1552    if (value > 4 * GiB) {
1553        error_setg(errp,
1554                   "Machine option 'max-ram-below-4g=%"PRIu64
1555                   "' expects size less than or equal to 4G", value);
1556        return;
1557    }
1558
1559    if (value < 1 * MiB) {
1560        warn_report("Only %" PRIu64 " bytes of RAM below the 4GiB boundary,"
1561                    "BIOS may not work with less than 1MiB", value);
1562    }
1563
1564    pcms->max_ram_below_4g = value;
1565}
1566
1567static void pc_machine_get_max_fw_size(Object *obj, Visitor *v,
1568                                       const char *name, void *opaque,
1569                                       Error **errp)
1570{
1571    PCMachineState *pcms = PC_MACHINE(obj);
1572    uint64_t value = pcms->max_fw_size;
1573
1574    visit_type_size(v, name, &value, errp);
1575}
1576
1577static void pc_machine_set_max_fw_size(Object *obj, Visitor *v,
1578                                       const char *name, void *opaque,
1579                                       Error **errp)
1580{
1581    PCMachineState *pcms = PC_MACHINE(obj);
1582    Error *error = NULL;
1583    uint64_t value;
1584
1585    visit_type_size(v, name, &value, &error);
1586    if (error) {
1587        error_propagate(errp, error);
1588        return;
1589    }
1590
1591    /*
1592    * We don't have a theoretically justifiable exact lower bound on the base
1593    * address of any flash mapping. In practice, the IO-APIC MMIO range is
1594    * [0xFEE00000..0xFEE01000] -- see IO_APIC_DEFAULT_ADDRESS --, leaving free
1595    * only 18MB-4KB below 4G. For now, restrict the cumulative mapping to 8MB in
1596    * size.
1597    */
1598    if (value > 16 * MiB) {
1599        error_setg(errp,
1600                   "User specified max allowed firmware size %" PRIu64 " is "
1601                   "greater than 16MiB. If combined firwmare size exceeds "
1602                   "16MiB the system may not boot, or experience intermittent"
1603                   "stability issues.",
1604                   value);
1605        return;
1606    }
1607
1608    pcms->max_fw_size = value;
1609}
1610
1611
1612static void pc_machine_initfn(Object *obj)
1613{
1614    PCMachineState *pcms = PC_MACHINE(obj);
1615
1616#ifdef CONFIG_VMPORT
1617    pcms->vmport = ON_OFF_AUTO_AUTO;
1618#else
1619    pcms->vmport = ON_OFF_AUTO_OFF;
1620#endif /* CONFIG_VMPORT */
1621    pcms->max_ram_below_4g = 0; /* use default */
1622    /* acpi build is enabled by default if machine supports it */
1623    pcms->acpi_build_enabled = PC_MACHINE_GET_CLASS(pcms)->has_acpi_build;
1624    pcms->smbus_enabled = true;
1625    pcms->sata_enabled = true;
1626    pcms->pit_enabled = true;
1627    pcms->max_fw_size = 8 * MiB;
1628#ifdef CONFIG_HPET
1629    pcms->hpet_enabled = true;
1630#endif
1631
1632    pc_system_flash_create(pcms);
1633    pcms->pcspk = isa_new(TYPE_PC_SPEAKER);
1634    object_property_add_alias(OBJECT(pcms), "pcspk-audiodev",
1635                              OBJECT(pcms->pcspk), "audiodev");
1636}
1637
1638static void pc_machine_reset(MachineState *machine)
1639{
1640    CPUState *cs;
1641    X86CPU *cpu;
1642
1643    qemu_devices_reset();
1644
1645    /* Reset APIC after devices have been reset to cancel
1646     * any changes that qemu_devices_reset() might have done.
1647     */
1648    CPU_FOREACH(cs) {
1649        cpu = X86_CPU(cs);
1650
1651        if (cpu->apic_state) {
1652            device_legacy_reset(cpu->apic_state);
1653        }
1654    }
1655}
1656
1657static void pc_machine_wakeup(MachineState *machine)
1658{
1659    cpu_synchronize_all_states();
1660    pc_machine_reset(machine);
1661    cpu_synchronize_all_post_reset();
1662}
1663
1664static bool pc_hotplug_allowed(MachineState *ms, DeviceState *dev, Error **errp)
1665{
1666    X86IOMMUState *iommu = x86_iommu_get_default();
1667    IntelIOMMUState *intel_iommu;
1668
1669    if (iommu &&
1670        object_dynamic_cast((Object *)iommu, TYPE_INTEL_IOMMU_DEVICE) &&
1671        object_dynamic_cast((Object *)dev, "vfio-pci")) {
1672        intel_iommu = INTEL_IOMMU_DEVICE(iommu);
1673        if (!intel_iommu->caching_mode) {
1674            error_setg(errp, "Device assignment is not allowed without "
1675                       "enabling caching-mode=on for Intel IOMMU.");
1676            return false;
1677        }
1678    }
1679
1680    return true;
1681}
1682
1683static void pc_machine_class_init(ObjectClass *oc, void *data)
1684{
1685    MachineClass *mc = MACHINE_CLASS(oc);
1686    PCMachineClass *pcmc = PC_MACHINE_CLASS(oc);
1687    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
1688
1689    pcmc->pci_enabled = true;
1690    pcmc->has_acpi_build = true;
1691    pcmc->rsdp_in_ram = true;
1692    pcmc->smbios_defaults = true;
1693    pcmc->smbios_uuid_encoded = true;
1694    pcmc->gigabyte_align = true;
1695    pcmc->has_reserved_memory = true;
1696    pcmc->kvmclock_enabled = true;
1697    pcmc->enforce_aligned_dimm = true;
1698    /* BIOS ACPI tables: 128K. Other BIOS datastructures: less than 4K reported
1699     * to be used at the moment, 32K should be enough for a while.  */
1700    pcmc->acpi_data_size = 0x20000 + 0x8000;
1701    pcmc->linuxboot_dma_enabled = true;
1702    pcmc->pvh_enabled = true;
1703    pcmc->kvmclock_create_always = true;
1704    assert(!mc->get_hotplug_handler);
1705    mc->get_hotplug_handler = pc_get_hotplug_handler;
1706    mc->hotplug_allowed = pc_hotplug_allowed;
1707    mc->cpu_index_to_instance_props = x86_cpu_index_to_props;
1708    mc->get_default_cpu_node_id = x86_get_default_cpu_node_id;
1709    mc->possible_cpu_arch_ids = x86_possible_cpu_arch_ids;
1710    mc->auto_enable_numa_with_memhp = true;
1711    mc->auto_enable_numa_with_memdev = true;
1712    mc->has_hotpluggable_cpus = true;
1713    mc->default_boot_order = "cad";
1714    mc->smp_parse = pc_smp_parse;
1715    mc->block_default_type = IF_IDE;
1716    mc->max_cpus = 255;
1717    mc->reset = pc_machine_reset;
1718    mc->wakeup = pc_machine_wakeup;
1719    hc->pre_plug = pc_machine_device_pre_plug_cb;
1720    hc->plug = pc_machine_device_plug_cb;
1721    hc->unplug_request = pc_machine_device_unplug_request_cb;
1722    hc->unplug = pc_machine_device_unplug_cb;
1723    mc->default_cpu_type = TARGET_DEFAULT_CPU_TYPE;
1724    mc->nvdimm_supported = true;
1725    mc->default_ram_id = "pc.ram";
1726
1727    object_class_property_add(oc, PC_MACHINE_MAX_RAM_BELOW_4G, "size",
1728        pc_machine_get_max_ram_below_4g, pc_machine_set_max_ram_below_4g,
1729        NULL, NULL);
1730    object_class_property_set_description(oc, PC_MACHINE_MAX_RAM_BELOW_4G,
1731        "Maximum ram below the 4G boundary (32bit boundary)");
1732
1733    object_class_property_add(oc, PC_MACHINE_DEVMEM_REGION_SIZE, "int",
1734        pc_machine_get_device_memory_region_size, NULL,
1735        NULL, NULL);
1736
1737    object_class_property_add(oc, PC_MACHINE_VMPORT, "OnOffAuto",
1738        pc_machine_get_vmport, pc_machine_set_vmport,
1739        NULL, NULL);
1740    object_class_property_set_description(oc, PC_MACHINE_VMPORT,
1741        "Enable vmport (pc & q35)");
1742
1743    object_class_property_add_bool(oc, PC_MACHINE_SMBUS,
1744        pc_machine_get_smbus, pc_machine_set_smbus);
1745
1746    object_class_property_add_bool(oc, PC_MACHINE_SATA,
1747        pc_machine_get_sata, pc_machine_set_sata);
1748
1749    object_class_property_add_bool(oc, PC_MACHINE_PIT,
1750        pc_machine_get_pit, pc_machine_set_pit);
1751
1752    object_class_property_add_bool(oc, "hpet",
1753        pc_machine_get_hpet, pc_machine_set_hpet);
1754
1755    object_class_property_add(oc, PC_MACHINE_MAX_FW_SIZE, "size",
1756        pc_machine_get_max_fw_size, pc_machine_set_max_fw_size,
1757        NULL, NULL);
1758    object_class_property_set_description(oc, PC_MACHINE_MAX_FW_SIZE,
1759        "Maximum combined firmware size");
1760}
1761
1762static const TypeInfo pc_machine_info = {
1763    .name = TYPE_PC_MACHINE,
1764    .parent = TYPE_X86_MACHINE,
1765    .abstract = true,
1766    .instance_size = sizeof(PCMachineState),
1767    .instance_init = pc_machine_initfn,
1768    .class_size = sizeof(PCMachineClass),
1769    .class_init = pc_machine_class_init,
1770    .interfaces = (InterfaceInfo[]) {
1771         { TYPE_HOTPLUG_HANDLER },
1772         { }
1773    },
1774};
1775
1776static void pc_machine_register_types(void)
1777{
1778    type_register_static(&pc_machine_info);
1779}
1780
1781type_init(pc_machine_register_types)
1782