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qemu-e2k/hw/i386/pc_q35.c
Vitaly Kuznetsov 8700a98443 target/i386: always create kvmclock device 
QEMU's kvmclock device is only created when KVM PV feature bits for
kvmclock (KVM_FEATURE_CLOCKSOURCE/KVM_FEATURE_CLOCKSOURCE2) are
exposed to the guest. With 'kvm=off' cpu flag the device is not
created and we don't call KVM_GET_CLOCK/KVM_SET_CLOCK upon migration.
It was reported that without these call at least Hyper-V TSC page
clocksouce (which can be enabled independently) gets broken after
migration.

Switch to creating kvmclock QEMU device unconditionally, it seems
to always make sense to call KVM_GET_CLOCK/KVM_SET_CLOCK on migration.
Use KVM_CAP_ADJUST_CLOCK check instead of CPUID feature bits.

Reported-by: Antoine Damhet <antoine.damhet@blade-group.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200922151934.899555-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-09-30 19:11:36 +02:00

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/*
* Q35 chipset based pc system emulator
*
* Copyright (c) 2003-2004 Fabrice Bellard
* Copyright (c) 2009, 2010
* Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
*
* This is based on pc.c, but heavily modified.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "hw/loader.h"
#include "sysemu/arch_init.h"
#include "hw/i2c/smbus_eeprom.h"
#include "hw/rtc/mc146818rtc.h"
#include "sysemu/kvm.h"
#include "hw/kvm/clock.h"
#include "hw/pci-host/q35.h"
#include "hw/qdev-properties.h"
#include "exec/address-spaces.h"
#include "hw/i386/x86.h"
#include "hw/i386/pc.h"
#include "hw/i386/ich9.h"
#include "hw/i386/amd_iommu.h"
#include "hw/i386/intel_iommu.h"
#include "hw/display/ramfb.h"
#include "hw/firmware/smbios.h"
#include "hw/ide/pci.h"
#include "hw/ide/ahci.h"
#include "hw/usb.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "sysemu/numa.h"
#include "hw/hyperv/vmbus-bridge.h"
#include "hw/mem/nvdimm.h"
#include "hw/i386/acpi-build.h"
/* ICH9 AHCI has 6 ports */
#define MAX_SATA_PORTS 6
struct ehci_companions {
const char *name;
int func;
int port;
};
static const struct ehci_companions ich9_1d[] = {
{ .name = "ich9-usb-uhci1", .func = 0, .port = 0 },
{ .name = "ich9-usb-uhci2", .func = 1, .port = 2 },
{ .name = "ich9-usb-uhci3", .func = 2, .port = 4 },
};
static const struct ehci_companions ich9_1a[] = {
{ .name = "ich9-usb-uhci4", .func = 0, .port = 0 },
{ .name = "ich9-usb-uhci5", .func = 1, .port = 2 },
{ .name = "ich9-usb-uhci6", .func = 2, .port = 4 },
};
static int ehci_create_ich9_with_companions(PCIBus *bus, int slot)
{
const struct ehci_companions *comp;
PCIDevice *ehci, *uhci;
BusState *usbbus;
const char *name;
int i;
switch (slot) {
case 0x1d:
name = "ich9-usb-ehci1";
comp = ich9_1d;
break;
case 0x1a:
name = "ich9-usb-ehci2";
comp = ich9_1a;
break;
default:
return -1;
}
ehci = pci_new_multifunction(PCI_DEVFN(slot, 7), true, name);
pci_realize_and_unref(ehci, bus, &error_fatal);
usbbus = QLIST_FIRST(&ehci->qdev.child_bus);
for (i = 0; i < 3; i++) {
uhci = pci_new_multifunction(PCI_DEVFN(slot, comp[i].func), true,
comp[i].name);
qdev_prop_set_string(&uhci->qdev, "masterbus", usbbus->name);
qdev_prop_set_uint32(&uhci->qdev, "firstport", comp[i].port);
pci_realize_and_unref(uhci, bus, &error_fatal);
}
return 0;
}
/* PC hardware initialisation */
static void pc_q35_init(MachineState *machine)
{
PCMachineState *pcms = PC_MACHINE(machine);
PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
X86MachineState *x86ms = X86_MACHINE(machine);
Q35PCIHost *q35_host;
PCIHostState *phb;
PCIBus *host_bus;
PCIDevice *lpc;
DeviceState *lpc_dev;
BusState *idebus[MAX_SATA_PORTS];
ISADevice *rtc_state;
MemoryRegion *system_io = get_system_io();
MemoryRegion *pci_memory;
MemoryRegion *rom_memory;
MemoryRegion *ram_memory;
GSIState *gsi_state;
ISABus *isa_bus;
int i;
ICH9LPCState *ich9_lpc;
PCIDevice *ahci;
ram_addr_t lowmem;
DriveInfo *hd[MAX_SATA_PORTS];
MachineClass *mc = MACHINE_GET_CLASS(machine);
/* Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory
* and 256 Mbytes for PCI Express Enhanced Configuration Access Mapping
* also known as MMCFG).
* If it doesn't, we need to split it in chunks below and above 4G.
* In any case, try to make sure that guest addresses aligned at
* 1G boundaries get mapped to host addresses aligned at 1G boundaries.
*/
if (machine->ram_size >= 0xb0000000) {
lowmem = 0x80000000;
} else {
lowmem = 0xb0000000;
}
/* Handle the machine opt max-ram-below-4g. It is basically doing
* min(qemu limit, user limit).
*/
if (!pcms->max_ram_below_4g) {
pcms->max_ram_below_4g = 4 * GiB;
}
if (lowmem > pcms->max_ram_below_4g) {
lowmem = pcms->max_ram_below_4g;
if (machine->ram_size - lowmem > lowmem &&
lowmem & (1 * GiB - 1)) {
warn_report("There is possibly poor performance as the ram size "
" (0x%" PRIx64 ") is more then twice the size of"
" max-ram-below-4g (%"PRIu64") and"
" max-ram-below-4g is not a multiple of 1G.",
(uint64_t)machine->ram_size, pcms->max_ram_below_4g);
}
}
if (machine->ram_size >= lowmem) {
x86ms->above_4g_mem_size = machine->ram_size - lowmem;
x86ms->below_4g_mem_size = lowmem;
} else {
x86ms->above_4g_mem_size = 0;
x86ms->below_4g_mem_size = machine->ram_size;
}
x86_cpus_init(x86ms, pcmc->default_cpu_version);
kvmclock_create(pcmc->kvmclock_create_always);
/* pci enabled */
if (pcmc->pci_enabled) {
pci_memory = g_new(MemoryRegion, 1);
memory_region_init(pci_memory, NULL, "pci", UINT64_MAX);
rom_memory = pci_memory;
} else {
pci_memory = NULL;
rom_memory = get_system_memory();
}
pc_guest_info_init(pcms);
if (pcmc->smbios_defaults) {
/* These values are guest ABI, do not change */
smbios_set_defaults("QEMU", "Standard PC (Q35 + ICH9, 2009)",
mc->name, pcmc->smbios_legacy_mode,
pcmc->smbios_uuid_encoded,
SMBIOS_ENTRY_POINT_21);
}
/* allocate ram and load rom/bios */
pc_memory_init(pcms, get_system_memory(), rom_memory, &ram_memory);
/* create pci host bus */
q35_host = Q35_HOST_DEVICE(qdev_new(TYPE_Q35_HOST_DEVICE));
object_property_add_child(qdev_get_machine(), "q35", OBJECT(q35_host));
object_property_set_link(OBJECT(q35_host), MCH_HOST_PROP_RAM_MEM,
OBJECT(ram_memory), NULL);
object_property_set_link(OBJECT(q35_host), MCH_HOST_PROP_PCI_MEM,
OBJECT(pci_memory), NULL);
object_property_set_link(OBJECT(q35_host), MCH_HOST_PROP_SYSTEM_MEM,
OBJECT(get_system_memory()), NULL);
object_property_set_link(OBJECT(q35_host), MCH_HOST_PROP_IO_MEM,
OBJECT(system_io), NULL);
object_property_set_int(OBJECT(q35_host), PCI_HOST_BELOW_4G_MEM_SIZE,
x86ms->below_4g_mem_size, NULL);
object_property_set_int(OBJECT(q35_host), PCI_HOST_ABOVE_4G_MEM_SIZE,
x86ms->above_4g_mem_size, NULL);
/* pci */
sysbus_realize_and_unref(SYS_BUS_DEVICE(q35_host), &error_fatal);
phb = PCI_HOST_BRIDGE(q35_host);
host_bus = phb->bus;
/* create ISA bus */
lpc = pci_create_simple_multifunction(host_bus, PCI_DEVFN(ICH9_LPC_DEV,
ICH9_LPC_FUNC), true,
TYPE_ICH9_LPC_DEVICE);
object_property_add_link(OBJECT(machine), PC_MACHINE_ACPI_DEVICE_PROP,
TYPE_HOTPLUG_HANDLER,
(Object **)&x86ms->acpi_dev,
object_property_allow_set_link,
OBJ_PROP_LINK_STRONG);
object_property_set_link(OBJECT(machine), PC_MACHINE_ACPI_DEVICE_PROP,
OBJECT(lpc), &error_abort);
/* irq lines */
gsi_state = pc_gsi_create(&x86ms->gsi, pcmc->pci_enabled);
ich9_lpc = ICH9_LPC_DEVICE(lpc);
lpc_dev = DEVICE(lpc);
for (i = 0; i < GSI_NUM_PINS; i++) {
qdev_connect_gpio_out_named(lpc_dev, ICH9_GPIO_GSI, i, x86ms->gsi[i]);
}
pci_bus_irqs(host_bus, ich9_lpc_set_irq, ich9_lpc_map_irq, ich9_lpc,
ICH9_LPC_NB_PIRQS);
pci_bus_set_route_irq_fn(host_bus, ich9_route_intx_pin_to_irq);
isa_bus = ich9_lpc->isa_bus;
pc_i8259_create(isa_bus, gsi_state->i8259_irq);
if (pcmc->pci_enabled) {
ioapic_init_gsi(gsi_state, "q35");
}
if (tcg_enabled()) {
x86_register_ferr_irq(x86ms->gsi[13]);
}
assert(pcms->vmport != ON_OFF_AUTO__MAX);
if (pcms->vmport == ON_OFF_AUTO_AUTO) {
pcms->vmport = ON_OFF_AUTO_ON;
}
/* init basic PC hardware */
pc_basic_device_init(pcms, isa_bus, x86ms->gsi, &rtc_state, !mc->no_floppy,
0xff0104);
/* connect pm stuff to lpc */
ich9_lpc_pm_init(lpc, x86_machine_is_smm_enabled(x86ms));
if (pcms->sata_enabled) {
/* ahci and SATA device, for q35 1 ahci controller is built-in */
ahci = pci_create_simple_multifunction(host_bus,
PCI_DEVFN(ICH9_SATA1_DEV,
ICH9_SATA1_FUNC),
true, "ich9-ahci");
idebus[0] = qdev_get_child_bus(&ahci->qdev, "ide.0");
idebus[1] = qdev_get_child_bus(&ahci->qdev, "ide.1");
g_assert(MAX_SATA_PORTS == ahci_get_num_ports(ahci));
ide_drive_get(hd, ahci_get_num_ports(ahci));
ahci_ide_create_devs(ahci, hd);
} else {
idebus[0] = idebus[1] = NULL;
}
if (machine_usb(machine)) {
/* Should we create 6 UHCI according to ich9 spec? */
ehci_create_ich9_with_companions(host_bus, 0x1d);
}
if (pcms->smbus_enabled) {
/* TODO: Populate SPD eeprom data. */
pcms->smbus = ich9_smb_init(host_bus,
PCI_DEVFN(ICH9_SMB_DEV, ICH9_SMB_FUNC),
0xb100);
smbus_eeprom_init(pcms->smbus, 8, NULL, 0);
}
pc_cmos_init(pcms, idebus[0], idebus[1], rtc_state);
/* the rest devices to which pci devfn is automatically assigned */
pc_vga_init(isa_bus, host_bus);
pc_nic_init(pcmc, isa_bus, host_bus);
if (machine->nvdimms_state->is_enabled) {
nvdimm_init_acpi_state(machine->nvdimms_state, system_io,
x86_nvdimm_acpi_dsmio,
x86ms->fw_cfg, OBJECT(pcms));
}
}
#define DEFINE_Q35_MACHINE(suffix, name, compatfn, optionfn) \
static void pc_init_##suffix(MachineState *machine) \
{ \
void (*compat)(MachineState *m) = (compatfn); \
if (compat) { \
compat(machine); \
} \
pc_q35_init(machine); \
} \
DEFINE_PC_MACHINE(suffix, name, pc_init_##suffix, optionfn)
static void pc_q35_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pcmc->default_nic_model = "e1000e";
m->family = "pc_q35";
m->desc = "Standard PC (Q35 + ICH9, 2009)";
m->units_per_default_bus = 1;
m->default_machine_opts = "firmware=bios-256k.bin";
m->default_display = "std";
m->default_kernel_irqchip_split = false;
m->no_floppy = 1;
machine_class_allow_dynamic_sysbus_dev(m, TYPE_AMD_IOMMU_DEVICE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_INTEL_IOMMU_DEVICE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
m->max_cpus = 288;
}
static void pc_q35_5_2_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_machine_options(m);
m->alias = "q35";
pcmc->default_cpu_version = 1;
}
DEFINE_Q35_MACHINE(v5_2, "pc-q35-5.2", NULL,
pc_q35_5_2_machine_options);
static void pc_q35_5_1_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_5_2_machine_options(m);
m->alias = NULL;
compat_props_add(m->compat_props, hw_compat_5_1, hw_compat_5_1_len);
compat_props_add(m->compat_props, pc_compat_5_1, pc_compat_5_1_len);
pcmc->kvmclock_create_always = false;
}
DEFINE_Q35_MACHINE(v5_1, "pc-q35-5.1", NULL,
pc_q35_5_1_machine_options);
static void pc_q35_5_0_machine_options(MachineClass *m)
{
pc_q35_5_1_machine_options(m);
m->alias = NULL;
m->numa_mem_supported = true;
compat_props_add(m->compat_props, hw_compat_5_0, hw_compat_5_0_len);
compat_props_add(m->compat_props, pc_compat_5_0, pc_compat_5_0_len);
m->auto_enable_numa_with_memdev = false;
}
DEFINE_Q35_MACHINE(v5_0, "pc-q35-5.0", NULL,
pc_q35_5_0_machine_options);
static void pc_q35_4_2_machine_options(MachineClass *m)
{
pc_q35_5_0_machine_options(m);
m->alias = NULL;
compat_props_add(m->compat_props, hw_compat_4_2, hw_compat_4_2_len);
compat_props_add(m->compat_props, pc_compat_4_2, pc_compat_4_2_len);
}
DEFINE_Q35_MACHINE(v4_2, "pc-q35-4.2", NULL,
pc_q35_4_2_machine_options);
static void pc_q35_4_1_machine_options(MachineClass *m)
{
pc_q35_4_2_machine_options(m);
m->alias = NULL;
compat_props_add(m->compat_props, hw_compat_4_1, hw_compat_4_1_len);
compat_props_add(m->compat_props, pc_compat_4_1, pc_compat_4_1_len);
}
DEFINE_Q35_MACHINE(v4_1, "pc-q35-4.1", NULL,
pc_q35_4_1_machine_options);
static void pc_q35_4_0_1_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_4_1_machine_options(m);
m->alias = NULL;
pcmc->default_cpu_version = CPU_VERSION_LEGACY;
/*
* This is the default machine for the 4.0-stable branch. It is basically
* a 4.0 that doesn't use split irqchip by default. It MUST hence apply the
* 4.0 compat props.
*/
compat_props_add(m->compat_props, hw_compat_4_0, hw_compat_4_0_len);
compat_props_add(m->compat_props, pc_compat_4_0, pc_compat_4_0_len);
}
DEFINE_Q35_MACHINE(v4_0_1, "pc-q35-4.0.1", NULL,
pc_q35_4_0_1_machine_options);
static void pc_q35_4_0_machine_options(MachineClass *m)
{
pc_q35_4_0_1_machine_options(m);
m->default_kernel_irqchip_split = true;
m->alias = NULL;
/* Compat props are applied by the 4.0.1 machine */
}
DEFINE_Q35_MACHINE(v4_0, "pc-q35-4.0", NULL,
pc_q35_4_0_machine_options);
static void pc_q35_3_1_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_4_0_machine_options(m);
m->default_kernel_irqchip_split = false;
pcmc->do_not_add_smb_acpi = true;
m->smbus_no_migration_support = true;
m->alias = NULL;
pcmc->pvh_enabled = false;
compat_props_add(m->compat_props, hw_compat_3_1, hw_compat_3_1_len);
compat_props_add(m->compat_props, pc_compat_3_1, pc_compat_3_1_len);
}
DEFINE_Q35_MACHINE(v3_1, "pc-q35-3.1", NULL,
pc_q35_3_1_machine_options);
static void pc_q35_3_0_machine_options(MachineClass *m)
{
pc_q35_3_1_machine_options(m);
compat_props_add(m->compat_props, hw_compat_3_0, hw_compat_3_0_len);
compat_props_add(m->compat_props, pc_compat_3_0, pc_compat_3_0_len);
}
DEFINE_Q35_MACHINE(v3_0, "pc-q35-3.0", NULL,
pc_q35_3_0_machine_options);
static void pc_q35_2_12_machine_options(MachineClass *m)
{
pc_q35_3_0_machine_options(m);
compat_props_add(m->compat_props, hw_compat_2_12, hw_compat_2_12_len);
compat_props_add(m->compat_props, pc_compat_2_12, pc_compat_2_12_len);
}
DEFINE_Q35_MACHINE(v2_12, "pc-q35-2.12", NULL,
pc_q35_2_12_machine_options);
static void pc_q35_2_11_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_2_12_machine_options(m);
pcmc->default_nic_model = "e1000";
compat_props_add(m->compat_props, hw_compat_2_11, hw_compat_2_11_len);
compat_props_add(m->compat_props, pc_compat_2_11, pc_compat_2_11_len);
}
DEFINE_Q35_MACHINE(v2_11, "pc-q35-2.11", NULL,
pc_q35_2_11_machine_options);
static void pc_q35_2_10_machine_options(MachineClass *m)
{
pc_q35_2_11_machine_options(m);
compat_props_add(m->compat_props, hw_compat_2_10, hw_compat_2_10_len);
compat_props_add(m->compat_props, pc_compat_2_10, pc_compat_2_10_len);
m->auto_enable_numa_with_memhp = false;
}
DEFINE_Q35_MACHINE(v2_10, "pc-q35-2.10", NULL,
pc_q35_2_10_machine_options);
static void pc_q35_2_9_machine_options(MachineClass *m)
{
pc_q35_2_10_machine_options(m);
compat_props_add(m->compat_props, hw_compat_2_9, hw_compat_2_9_len);
compat_props_add(m->compat_props, pc_compat_2_9, pc_compat_2_9_len);
}
DEFINE_Q35_MACHINE(v2_9, "pc-q35-2.9", NULL,
pc_q35_2_9_machine_options);
static void pc_q35_2_8_machine_options(MachineClass *m)
{
pc_q35_2_9_machine_options(m);
compat_props_add(m->compat_props, hw_compat_2_8, hw_compat_2_8_len);
compat_props_add(m->compat_props, pc_compat_2_8, pc_compat_2_8_len);
}
DEFINE_Q35_MACHINE(v2_8, "pc-q35-2.8", NULL,
pc_q35_2_8_machine_options);
static void pc_q35_2_7_machine_options(MachineClass *m)
{
pc_q35_2_8_machine_options(m);
m->max_cpus = 255;
compat_props_add(m->compat_props, hw_compat_2_7, hw_compat_2_7_len);
compat_props_add(m->compat_props, pc_compat_2_7, pc_compat_2_7_len);
}
DEFINE_Q35_MACHINE(v2_7, "pc-q35-2.7", NULL,
pc_q35_2_7_machine_options);
static void pc_q35_2_6_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_2_7_machine_options(m);
pcmc->legacy_cpu_hotplug = true;
pcmc->linuxboot_dma_enabled = false;
compat_props_add(m->compat_props, hw_compat_2_6, hw_compat_2_6_len);
compat_props_add(m->compat_props, pc_compat_2_6, pc_compat_2_6_len);
}
DEFINE_Q35_MACHINE(v2_6, "pc-q35-2.6", NULL,
pc_q35_2_6_machine_options);
static void pc_q35_2_5_machine_options(MachineClass *m)
{
X86MachineClass *x86mc = X86_MACHINE_CLASS(m);
pc_q35_2_6_machine_options(m);
x86mc->save_tsc_khz = false;
m->legacy_fw_cfg_order = 1;
compat_props_add(m->compat_props, hw_compat_2_5, hw_compat_2_5_len);
compat_props_add(m->compat_props, pc_compat_2_5, pc_compat_2_5_len);
}
DEFINE_Q35_MACHINE(v2_5, "pc-q35-2.5", NULL,
pc_q35_2_5_machine_options);
static void pc_q35_2_4_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
pc_q35_2_5_machine_options(m);
m->hw_version = "2.4.0";
pcmc->broken_reserved_end = true;
compat_props_add(m->compat_props, hw_compat_2_4, hw_compat_2_4_len);
compat_props_add(m->compat_props, pc_compat_2_4, pc_compat_2_4_len);
}
DEFINE_Q35_MACHINE(v2_4, "pc-q35-2.4", NULL,
pc_q35_2_4_machine_options);
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