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x86 queue, 2016-07-20 

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Merge remote-tracking branch 'remotes/ehabkost/tags/x86-pull-request' into staging

x86 queue, 2016-07-20

# gpg: Signature made Wed 20 Jul 2016 16:07:38 BST
# gpg:                using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-pull-request: (28 commits)
  pc: Make device_del CPU work for x86 CPUs
  target-i386: Add x86_cpu_unrealizefn()
  apic: Use apic_id as apic's migration instance_id
  (kvm)apic: Add unrealize callbacks
  apic: kvm-apic: Fix crash due to access to freed memory region
  apic: Drop APICCommonState.idx and use APIC ID as index in local_apics[]
  apic: move MAX_APICS check to 'apic' class
  pc: Implement query-hotpluggable-cpus callback
  pc: cpu: Allow device_add to be used with x86 cpu
  pc: Enforce adding CPUs contiguously and removing them in opposite order
  pc: Forbid BSP removal
  pc: Register created initial and hotpluged CPUs in one place pc_cpu_plug()
  pc: Delay setting number of boot CPUs to machine_done time
  pc: Set APIC ID based on socket/core/thread ids if it's not been set yet
  target-i386: Fix apic object leak when CPU is deleted
  target-i386: cpu: Do not ignore error and fix apic parent
  target-i386: Add support for UMIP and RDPID CPUID bits
  target-i386: Add socket/core/thread properties to X86CPU
  target-i386: Replace custom apic-id setter/getter with static property
  pc: cpu: Consolidate apic-id validity checks in pc_cpu_pre_plug()
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2016-07-20 21:32:56 +01:00
parent 3b55fbdcb0 8fe6374e8e
commit e66b05e9ca
11 changed files with 523 additions and 134 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
hw/i386/kvm/apic.c
View File

@ -184,19 +184,24 @@ static void kvm_apic_realize(DeviceState *dev, Error **errp)
{
APICCommonState *s = APIC_COMMON(dev);
memory_region_init_io(&s->io_memory, NULL, &kvm_apic_io_ops, s, "kvm-apic-msi",
APIC_SPACE_SIZE);
memory_region_init_io(&s->io_memory, OBJECT(s), &kvm_apic_io_ops, s,
"kvm-apic-msi", APIC_SPACE_SIZE);
if (kvm_has_gsi_routing()) {
msi_nonbroken = true;
}
}
static void kvm_apic_unrealize(DeviceState *dev, Error **errp)
{
}
static void kvm_apic_class_init(ObjectClass *klass, void *data)
{
APICCommonClass *k = APIC_COMMON_CLASS(klass);
k->realize = kvm_apic_realize;
k->unrealize = kvm_apic_unrealize;
k->reset = kvm_apic_reset;
k->set_base = kvm_apic_set_base;
k->set_tpr = kvm_apic_set_tpr;

279
hw/i386/pc.c
View File

@ -471,9 +471,6 @@ void pc_cmos_init(PCMachineState *pcms,
rtc_set_memory(s, 0x5c, val >> 8);
rtc_set_memory(s, 0x5d, val >> 16);
/* set the number of CPU */
rtc_set_memory(s, 0x5f, smp_cpus - 1);
object_property_add_link(OBJECT(pcms), "rtc_state",
TYPE_ISA_DEVICE,
(Object **)&pcms->rtc,
@ -1090,6 +1087,17 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
}
}
static int pc_present_cpus_count(PCMachineState *pcms)
{
int i, boot_cpus = 0;
for (i = 0; i < pcms->possible_cpus->len; i++) {
if (pcms->possible_cpus->cpus[i].cpu) {
boot_cpus++;
}
}
return boot_cpus;
}
static X86CPU *pc_new_cpu(const char *typename, int64_t apic_id,
Error **errp)
{
@ -1122,18 +1130,6 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
return;
}
if (cpu_exists(apic_id)) {
error_setg(errp, "Unable to add CPU: %" PRIi64
", it already exists", id);
return;
}
if (id >= max_cpus) {
error_setg(errp, "Unable to add CPU: %" PRIi64
", max allowed: %d", id, max_cpus - 1);
return;
}
if (apic_id >= ACPI_CPU_HOTPLUG_ID_LIMIT) {
error_setg(errp, "Unable to add CPU: %" PRIi64
", resulting APIC ID (%" PRIi64 ") is too large",
@ -1208,7 +1204,6 @@ void pc_cpus_init(PCMachineState *pcms)
if (i < smp_cpus) {
cpu = pc_new_cpu(typename, x86_cpu_apic_id_from_index(i),
&error_fatal);
pcms->possible_cpus->cpus[i].cpu = CPU(cpu);
object_unref(OBJECT(cpu));
}
}
@ -1252,6 +1247,9 @@ void pc_machine_done(Notifier *notifier, void *data)
PCMachineState, machine_done);
PCIBus *bus = pcms->bus;
/* set the number of CPUs */
rtc_set_memory(pcms->rtc, 0x5f, pc_present_cpus_count(pcms) - 1);
if (bus) {
int extra_hosts = 0;
@ -1756,39 +1754,48 @@ static int pc_apic_cmp(const void *a, const void *b)
return apic_a->arch_id - apic_b->arch_id;
}
/* returns pointer to CPUArchId descriptor that matches CPU's apic_id
* in pcms->possible_cpus->cpus, if pcms->possible_cpus->cpus has no
* entry correponding to CPU's apic_id returns NULL.
*/
static CPUArchId *pc_find_cpu_slot(PCMachineState *pcms, CPUState *cpu,
int *idx)
{
CPUClass *cc = CPU_GET_CLASS(cpu);
CPUArchId apic_id, *found_cpu;
apic_id.arch_id = cc->get_arch_id(CPU(cpu));
found_cpu = bsearch(&apic_id, pcms->possible_cpus->cpus,
pcms->possible_cpus->len, sizeof(*pcms->possible_cpus->cpus),
pc_apic_cmp);
if (found_cpu && idx) {
*idx = found_cpu - pcms->possible_cpus->cpus;
}
return found_cpu;
}
static void pc_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
CPUClass *cc = CPU_GET_CLASS(dev);
CPUArchId apic_id, *found_cpu;
CPUArchId *found_cpu;
HotplugHandlerClass *hhc;
Error *local_err = NULL;
PCMachineState *pcms = PC_MACHINE(hotplug_dev);
if (!dev->hotplugged) {
goto out;
if (pcms->acpi_dev) {
hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev);
hhc->plug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
if (local_err) {
goto out;
}
}
if (!pcms->acpi_dev) {
error_setg(&local_err,
"cpu hotplug is not enabled: missing acpi device");
goto out;
if (dev->hotplugged) {
/* increment the number of CPUs */
rtc_set_memory(pcms->rtc, 0x5f, rtc_get_memory(pcms->rtc, 0x5f) + 1);
}
hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev);
hhc->plug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
if (local_err) {
goto out;
}
/* increment the number of CPUs */
rtc_set_memory(pcms->rtc, 0x5f, rtc_get_memory(pcms->rtc, 0x5f) + 1);
apic_id.arch_id = cc->get_arch_id(CPU(dev));
found_cpu = bsearch(&apic_id, pcms->possible_cpus->cpus,
pcms->possible_cpus->len, sizeof(*pcms->possible_cpus->cpus),
pc_apic_cmp);
assert(found_cpu);
found_cpu = pc_find_cpu_slot(pcms, CPU(dev), NULL);
found_cpu->cpu = CPU(dev);
out:
error_propagate(errp, local_err);
@ -1796,10 +1803,35 @@ out:
static void pc_cpu_unplug_request_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
int idx = -1;
HotplugHandlerClass *hhc;
Error *local_err = NULL;
PCMachineState *pcms = PC_MACHINE(hotplug_dev);
pc_find_cpu_slot(pcms, CPU(dev), &idx);
assert(idx != -1);
if (idx == 0) {
error_setg(&local_err, "Boot CPU is unpluggable");
goto out;
}
if (idx < pcms->possible_cpus->len - 1 &&
pcms->possible_cpus->cpus[idx + 1].cpu != NULL) {
X86CPU *cpu;
for (idx = pcms->possible_cpus->len - 1;
pcms->possible_cpus->cpus[idx].cpu == NULL; idx--) {
;;
}
cpu = X86_CPU(pcms->possible_cpus->cpus[idx].cpu);
error_setg(&local_err, "CPU [socket-id: %u, core-id: %u,"
" thread-id: %u] should be removed first",
cpu->socket_id, cpu->core_id, cpu->thread_id);
goto out;
}
hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev);
hhc->unplug_request(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
@ -1815,6 +1847,7 @@ static void pc_cpu_unplug_request_cb(HotplugHandler *hotplug_dev,
static void pc_cpu_unplug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
CPUArchId *found_cpu;
HotplugHandlerClass *hhc;
Error *local_err = NULL;
PCMachineState *pcms = PC_MACHINE(hotplug_dev);
@ -1826,17 +1859,129 @@ static void pc_cpu_unplug_cb(HotplugHandler *hotplug_dev,
goto out;
}
/*
* TODO: enable unplug once generic CPU remove bits land
* for now guest will be able to eject CPU ACPI wise but
* it will come back again on machine reset.
*/
/* object_unparent(OBJECT(dev)); */
found_cpu = pc_find_cpu_slot(pcms, CPU(dev), NULL);
found_cpu->cpu = NULL;
object_unparent(OBJECT(dev));
rtc_set_memory(pcms->rtc, 0x5f, rtc_get_memory(pcms->rtc, 0x5f) - 1);
out:
error_propagate(errp, local_err);
}
static void pc_cpu_pre_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
int idx;
CPUArchId *cpu_slot;
X86CPUTopoInfo topo;
X86CPU *cpu = X86_CPU(dev);
PCMachineState *pcms = PC_MACHINE(hotplug_dev);
/* if APIC ID is not set, set it based on socket/core/thread properties */
if (cpu->apic_id == UNASSIGNED_APIC_ID) {
int max_socket = (max_cpus - 1) / smp_threads / smp_cores;
if (cpu->socket_id < 0) {
error_setg(errp, "CPU socket-id is not set");
return;
} else if (cpu->socket_id > max_socket) {
error_setg(errp, "Invalid CPU socket-id: %u must be in range 0:%u",
cpu->socket_id, max_socket);
return;
}
if (cpu->core_id < 0) {
error_setg(errp, "CPU core-id is not set");
return;
} else if (cpu->core_id > (smp_cores - 1)) {
error_setg(errp, "Invalid CPU core-id: %u must be in range 0:%u",
cpu->core_id, smp_cores - 1);
return;
}
if (cpu->thread_id < 0) {
error_setg(errp, "CPU thread-id is not set");
return;
} else if (cpu->thread_id > (smp_threads - 1)) {
error_setg(errp, "Invalid CPU thread-id: %u must be in range 0:%u",
cpu->thread_id, smp_threads - 1);
return;
}
topo.pkg_id = cpu->socket_id;
topo.core_id = cpu->core_id;
topo.smt_id = cpu->thread_id;
cpu->apic_id = apicid_from_topo_ids(smp_cores, smp_threads, &topo);
}
cpu_slot = pc_find_cpu_slot(pcms, CPU(dev), &idx);
if (!cpu_slot) {
x86_topo_ids_from_apicid(cpu->apic_id, smp_cores, smp_threads, &topo);
error_setg(errp, "Invalid CPU [socket: %u, core: %u, thread: %u] with"
" APIC ID %" PRIu32 ", valid index range 0:%d",
topo.pkg_id, topo.core_id, topo.smt_id, cpu->apic_id,
pcms->possible_cpus->len - 1);
return;
}
if (cpu_slot->cpu) {
error_setg(errp, "CPU[%d] with APIC ID %" PRIu32 " exists",
idx, cpu->apic_id);
return;
}
if (idx != 0 && pcms->possible_cpus->cpus[idx - 1].cpu == NULL) {
PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
for (idx = 1; pcms->possible_cpus->cpus[idx].cpu != NULL; idx++) {
;;
}
x86_topo_ids_from_apicid(pcms->possible_cpus->cpus[idx].arch_id,
smp_cores, smp_threads, &topo);
if (!pcmc->legacy_cpu_hotplug) {
error_setg(errp, "CPU [socket: %u, core: %u, thread: %u] should be"
" added first", topo.pkg_id, topo.core_id, topo.smt_id);
return;
}
}
/* if 'address' properties socket-id/core-id/thread-id are not set, set them
* so that query_hotpluggable_cpus would show correct values
*/
/* TODO: move socket_id/core_id/thread_id checks into x86_cpu_realizefn()
* once -smp refactoring is complete and there will be CPU private
* CPUState::nr_cores and CPUState::nr_threads fields instead of globals */
x86_topo_ids_from_apicid(cpu->apic_id, smp_cores, smp_threads, &topo);
if (cpu->socket_id != -1 && cpu->socket_id != topo.pkg_id) {
error_setg(errp, "property socket-id: %u doesn't match set apic-id:"
" 0x%x (socket-id: %u)", cpu->socket_id, cpu->apic_id, topo.pkg_id);
return;
}
cpu->socket_id = topo.pkg_id;
if (cpu->core_id != -1 && cpu->core_id != topo.core_id) {
error_setg(errp, "property core-id: %u doesn't match set apic-id:"
" 0x%x (core-id: %u)", cpu->core_id, cpu->apic_id, topo.core_id);
return;
}
cpu->core_id = topo.core_id;
if (cpu->thread_id != -1 && cpu->thread_id != topo.smt_id) {
error_setg(errp, "property thread-id: %u doesn't match set apic-id:"
" 0x%x (thread-id: %u)", cpu->thread_id, cpu->apic_id, topo.smt_id);
return;
}
cpu->thread_id = topo.smt_id;
}
static void pc_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
pc_cpu_pre_plug(hotplug_dev, dev, errp);
}
}
static void pc_machine_device_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@ -2090,6 +2235,50 @@ static CPUArchIdList *pc_possible_cpu_arch_ids(MachineState *machine)
return list;
}
static HotpluggableCPUList *pc_query_hotpluggable_cpus(MachineState *machine)
{
int i;
CPUState *cpu;
HotpluggableCPUList *head = NULL;
PCMachineState *pcms = PC_MACHINE(machine);
const char *cpu_type;
cpu = pcms->possible_cpus->cpus[0].cpu;
assert(cpu); /* BSP is always present */
cpu_type = object_class_get_name(OBJECT_CLASS(CPU_GET_CLASS(cpu)));
for (i = 0; i < pcms->possible_cpus->len; i++) {
X86CPUTopoInfo topo;
HotpluggableCPUList *list_item = g_new0(typeof(*list_item), 1);
HotpluggableCPU *cpu_item = g_new0(typeof(*cpu_item), 1);
CpuInstanceProperties *cpu_props = g_new0(typeof(*cpu_props), 1);
const uint32_t apic_id = pcms->possible_cpus->cpus[i].arch_id;
x86_topo_ids_from_apicid(apic_id, smp_cores, smp_threads, &topo);
cpu_item->type = g_strdup(cpu_type);
cpu_item->vcpus_count = 1;
cpu_props->has_socket_id = true;
cpu_props->socket_id = topo.pkg_id;
cpu_props->has_core_id = true;
cpu_props->core_id = topo.core_id;
cpu_props->has_thread_id = true;
cpu_props->thread_id = topo.smt_id;
cpu_item->props = cpu_props;
cpu = pcms->possible_cpus->cpus[i].cpu;
if (cpu) {
cpu_item->has_qom_path = true;
cpu_item->qom_path = object_get_canonical_path(OBJECT(cpu));
}
list_item->value = cpu_item;
list_item->next = head;
head = list_item;
}
return head;
}
static void x86_nmi(NMIState *n, int cpu_index, Error **errp)
{
/* cpu index isn't used */
@ -2130,10 +2319,12 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
mc->get_hotplug_handler = pc_get_hotpug_handler;
mc->cpu_index_to_socket_id = pc_cpu_index_to_socket_id;
mc->possible_cpu_arch_ids = pc_possible_cpu_arch_ids;
mc->query_hotpluggable_cpus = pc_query_hotpluggable_cpus;
mc->default_boot_order = "cad";
mc->hot_add_cpu = pc_hot_add_cpu;
mc->max_cpus = 255;
mc->reset = pc_machine_reset;
hc->pre_plug = pc_machine_device_pre_plug_cb;
hc->plug = pc_machine_device_plug_cb;
hc->unplug_request = pc_machine_device_unplug_request_cb;
hc->unplug = pc_machine_device_unplug_cb;

26
hw/intc/apic.c
View File

@ -28,7 +28,9 @@
#include "trace.h"
#include "hw/i386/pc.h"
#include "hw/i386/apic-msidef.h"
#include "qapi/error.h"
#define MAX_APICS 255
#define MAX_APIC_WORDS 8
#define SYNC_FROM_VAPIC 0x1
@ -419,7 +421,7 @@ static int apic_find_dest(uint8_t dest)
int i;
if (apic && apic->id == dest)
return dest; /* shortcut in case apic->id == apic->idx */
return dest; /* shortcut in case apic->id == local_apics[dest]->id */
for (i = 0; i < MAX_APICS; i++) {
apic = local_apics[i];
@ -502,14 +504,14 @@ static void apic_deliver(DeviceState *dev, uint8_t dest, uint8_t dest_mode,
break;
case 1:
memset(deliver_bitmask, 0x00, sizeof(deliver_bitmask));
apic_set_bit(deliver_bitmask, s->idx);
apic_set_bit(deliver_bitmask, s->id);
break;
case 2:
memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
break;
case 3:
memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
apic_reset_bit(deliver_bitmask, s->idx);
apic_reset_bit(deliver_bitmask, s->id);
break;
}
@ -870,20 +872,36 @@ static void apic_realize(DeviceState *dev, Error **errp)
{
APICCommonState *s = APIC_COMMON(dev);
if (s->id >= MAX_APICS) {
error_setg(errp, "%s initialization failed. APIC ID %d is invalid",
object_get_typename(OBJECT(dev)), s->id);
return;
}
memory_region_init_io(&s->io_memory, OBJECT(s), &apic_io_ops, s, "apic-msi",
APIC_SPACE_SIZE);
s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, apic_timer, s);
local_apics[s->idx] = s;
local_apics[s->id] = s;
msi_nonbroken = true;
}
static void apic_unrealize(DeviceState *dev, Error **errp)
{
APICCommonState *s = APIC_COMMON(dev);
timer_del(s->timer);
timer_free(s->timer);
local_apics[s->id] = NULL;
}
static void apic_class_init(ObjectClass *klass, void *data)
{
APICCommonClass *k = APIC_COMMON_CLASS(klass);
k->realize = apic_realize;
k->unrealize = apic_unrealize;
k->set_base = apic_set_base;
k->set_tpr = apic_set_tpr;
k->get_tpr = apic_get_tpr;

33
hw/intc/apic_common.c
View File

@ -294,19 +294,14 @@ static int apic_load_old(QEMUFile *f, void *opaque, int version_id)
return 0;
}
static const VMStateDescription vmstate_apic_common;
static void apic_common_realize(DeviceState *dev, Error **errp)
{
APICCommonState *s = APIC_COMMON(dev);
APICCommonClass *info;
static DeviceState *vapic;
static int apic_no;
if (apic_no >= MAX_APICS) {
error_setg(errp, "%s initialization failed.",
object_get_typename(OBJECT(dev)));
return;
}
s->idx = apic_no++;
int instance_id = s->id;
info = APIC_COMMON_GET_CLASS(s);
info->realize(dev, errp);
@ -321,6 +316,24 @@ static void apic_common_realize(DeviceState *dev, Error **errp)
info->enable_tpr_reporting(s, true);
}
if (s->legacy_instance_id) {
instance_id = -1;
}
vmstate_register_with_alias_id(NULL, instance_id, &vmstate_apic_common,
s, -1, 0);
}
static void apic_common_unrealize(DeviceState *dev, Error **errp)
{
APICCommonState *s = APIC_COMMON(dev);
APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
vmstate_unregister(NULL, &vmstate_apic_common, s);
info->unrealize(dev, errp);
if (apic_report_tpr_access && info->enable_tpr_reporting) {
info->enable_tpr_reporting(s, false);
}
}
static int apic_pre_load(void *opaque)
@ -418,6 +431,8 @@ static Property apic_properties_common[] = {
DEFINE_PROP_UINT8("version", APICCommonState, version, 0x14),
DEFINE_PROP_BIT("vapic", APICCommonState, vapic_control, VAPIC_ENABLE_BIT,
true),
DEFINE_PROP_BOOL("legacy-instance-id", APICCommonState, legacy_instance_id,
false),
DEFINE_PROP_END_OF_LIST(),
};
@ -425,10 +440,10 @@ static void apic_common_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &vmstate_apic_common;
dc->reset = apic_reset_common;
dc->props = apic_properties_common;
dc->realize = apic_common_realize;
dc->unrealize = apic_common_unrealize;
/*
* Reason: APIC and CPU need to be wired up by
* x86_cpu_apic_create()

5
include/hw/i386/apic_internal.h
View File

@ -121,8 +121,6 @@
#define VAPIC_ENABLE_BIT 0
#define VAPIC_ENABLE_MASK (1 << VAPIC_ENABLE_BIT)
#define MAX_APICS 255
typedef struct APICCommonState APICCommonState;
#define TYPE_APIC_COMMON "apic-common"
@ -138,6 +136,7 @@ typedef struct APICCommonClass
DeviceClass parent_class;
DeviceRealize realize;
DeviceUnrealize unrealize;
void (*set_base)(APICCommonState *s, uint64_t val);
void (*set_tpr)(APICCommonState *s, uint8_t val);
uint8_t (*get_tpr)(APICCommonState *s);
@ -176,7 +175,6 @@ struct APICCommonState {
uint32_t initial_count;
int64_t initial_count_load_time;
int64_t next_time;
int idx;
QEMUTimer *timer;
int64_t timer_expiry;
int sipi_vector;
@ -185,6 +183,7 @@ struct APICCommonState {
uint32_t vapic_control;
DeviceState *vapic;
hwaddr vapic_paddr; /* note: persistence via kvmvapic */
bool legacy_instance_id;
};
typedef struct VAPICState {

10
include/hw/i386/pc.h
View File

@ -377,6 +377,16 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
.driver = "vmxnet3",\
.property = "romfile",\
.value = "",\
},\
{\
.driver = TYPE_X86_CPU,\
.property = "fill-mtrr-mask",\
.value = "off",\
},\
{\
.driver = "apic",\
.property = "legacy-instance-id",\
.value = "on",\
},
#define PC_COMPAT_2_5 \

15
include/hw/i386/topology.h
View File

@ -117,6 +117,21 @@ static inline void x86_topo_ids_from_idx(unsigned nr_cores,
topo->pkg_id = core_index / nr_cores;
}
/* Calculate thread/core/package IDs for a specific topology,
* based on APIC ID
*/
static inline void x86_topo_ids_from_apicid(apic_id_t apicid,
unsigned nr_cores,
unsigned nr_threads,
X86CPUTopoInfo *topo)
{
topo->smt_id = apicid &
~(0xFFFFFFFFUL << apicid_smt_width(nr_cores, nr_threads));
topo->core_id = (apicid >> apicid_core_offset(nr_cores, nr_threads)) &
~(0xFFFFFFFFUL << apicid_core_width(nr_cores, nr_threads));
topo->pkg_id = apicid >> apicid_pkg_offset(nr_cores, nr_threads);
}
/* Make APIC ID for the CPU 'cpu_index'
*
* 'cpu_index' is a sequential, contiguous ID for the CPU.

15
qmp-commands.hx
View File

@ -5026,3 +5026,18 @@ Example for pseries machine type started with
{ "props": { "core-id": 0 }, "type": "POWER8-spapr-cpu-core",
"vcpus-count": 1, "qom-path": "/machine/unattached/device[0]"}
]}'
Example for pc machine type started with
-smp 1,maxcpus=2:
-> { "execute": "query-hotpluggable-cpus" }
<- {"return": [
{
"type": "qemu64-x86_64-cpu", "vcpus-count": 1,
"props": {"core-id": 0, "socket-id": 1, "thread-id": 0}
},
{
"qom-path": "/machine/unattached/device[0]",
"type": "qemu64-x86_64-cpu", "vcpus-count": 1,
"props": {"core-id": 0, "socket-id": 0, "thread-id": 0}
}
]}

198
target-i386/cpu.c
View File

@ -305,12 +305,12 @@ static const char *cpuid_7_0_ebx_feature_name[] = {
};
static const char *cpuid_7_0_ecx_feature_name[] = {
NULL, NULL, NULL, "pku",
NULL, NULL, "umip", "pku",
"ospke", NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, "rdpid", NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
};
@ -1893,50 +1893,6 @@ static void x86_cpuid_set_tsc_freq(Object *obj, Visitor *v, const char *name,
cpu->env.tsc_khz = cpu->env.user_tsc_khz = value / 1000;
}
static void x86_cpuid_get_apic_id(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
X86CPU *cpu = X86_CPU(obj);
int64_t value = cpu->apic_id;
visit_type_int(v, name, &value, errp);
}
static void x86_cpuid_set_apic_id(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
X86CPU *cpu = X86_CPU(obj);
DeviceState *dev = DEVICE(obj);
const int64_t min = 0;
const int64_t max = UINT32_MAX;
Error *error = NULL;
int64_t value;
if (dev->realized) {
error_setg(errp, "Attempt to set property '%s' on '%s' after "
"it was realized", name, object_get_typename(obj));
return;
}
visit_type_int(v, name, &value, &error);
if (error) {
error_propagate(errp, error);
return;
}
if (value < min || value > max) {
error_setg(errp, "Property %s.%s doesn't take value %" PRId64
" (minimum: %" PRId64 ", maximum: %" PRId64 ")" ,
object_get_typename(obj), name, value, min, max);
return;
}
if ((value != cpu->apic_id) && cpu_exists(value)) {
error_setg(errp, "CPU with APIC ID %" PRIi64 " exists", value);
return;
}
cpu->apic_id = value;
}
/* Generic getter for "feature-words" and "filtered-features" properties */
static void x86_cpu_get_feature_words(Object *obj, Visitor *v,
const char *name, void *opaque,
@ -2641,17 +2597,13 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
break;
case 0x80000008:
/* virtual & phys address size in low 2 bytes. */
/* XXX: This value must match the one used in the MMU code. */
if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) {
/* 64 bit processor */
/* XXX: The physical address space is limited to 42 bits in exec.c. */
*eax = 0x00003028; /* 48 bits virtual, 40 bits physical */
/* 64 bit processor, 48 bits virtual, configurable
* physical bits.
*/
*eax = 0x00003000 + cpu->phys_bits;
} else {
if (env->features[FEAT_1_EDX] & CPUID_PSE36) {
*eax = 0x00000024; /* 36 bits physical */
} else {
*eax = 0x00000020; /* 32 bits physical */
}
*eax = cpu->phys_bits;
}
*ebx = 0;
*ecx = 0;
@ -2874,8 +2826,10 @@ static void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
cpu->apic_state = DEVICE(object_new(apic_type));
object_property_add_child(OBJECT(cpu), "apic",
OBJECT(cpu->apic_state), NULL);
object_property_add_child(OBJECT(cpu), "lapic",
OBJECT(cpu->apic_state), &error_abort);
object_unref(OBJECT(cpu->apic_state));
qdev_prop_set_uint8(cpu->apic_state, "id", cpu->apic_id);
/* TODO: convert to link<> */
apic = APIC_COMMON(cpu->apic_state);
@ -2926,6 +2880,31 @@ static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
}
#endif
/* Note: Only safe for use on x86(-64) hosts */
static uint32_t x86_host_phys_bits(void)
{
uint32_t eax;
uint32_t host_phys_bits;
host_cpuid(0x80000000, 0, &eax, NULL, NULL, NULL);
if (eax >= 0x80000008) {
host_cpuid(0x80000008, 0, &eax, NULL, NULL, NULL);
/* Note: According to AMD doc 25481 rev 2.34 they have a field
* at 23:16 that can specify a maximum physical address bits for
* the guest that can override this value; but I've not seen
* anything with that set.
*/
host_phys_bits = eax & 0xff;
} else {
/* It's an odd 64 bit machine that doesn't have the leaf for
* physical address bits; fall back to 36 that's most older
* Intel.
*/
host_phys_bits = 36;
}
return host_phys_bits;
}
#define IS_INTEL_CPU(env) ((env)->cpuid_vendor1 == CPUID_VENDOR_INTEL_1 && \
(env)->cpuid_vendor2 == CPUID_VENDOR_INTEL_2 && \
@ -2950,7 +2929,7 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
goto out;
}
if (cpu->apic_id < 0) {
if (cpu->apic_id == UNASSIGNED_APIC_ID) {
error_setg(errp, "apic-id property was not initialized properly");
return;
}
@ -2993,7 +2972,70 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
& CPUID_EXT2_AMD_ALIASES);
}
/* For 64bit systems think about the number of physical bits to present.
* ideally this should be the same as the host; anything other than matching
* the host can cause incorrect guest behaviour.
* QEMU used to pick the magic value of 40 bits that corresponds to
* consumer AMD devices but nothing else.
*/
if (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) {
if (kvm_enabled()) {
uint32_t host_phys_bits = x86_host_phys_bits();
static bool warned;
if (cpu->host_phys_bits) {
/* The user asked for us to use the host physical bits */
cpu->phys_bits = host_phys_bits;
}
/* Print a warning if the user set it to a value that's not the
* host value.
*/
if (cpu->phys_bits != host_phys_bits && cpu->phys_bits != 0 &&
!warned) {
error_report("Warning: Host physical bits (%u)"
" does not match phys-bits property (%u)",
host_phys_bits, cpu->phys_bits);
warned = true;
}
if (cpu->phys_bits &&
(cpu->phys_bits > TARGET_PHYS_ADDR_SPACE_BITS ||
cpu->phys_bits < 32)) {
error_setg(errp, "phys-bits should be between 32 and %u "
" (but is %u)",
TARGET_PHYS_ADDR_SPACE_BITS, cpu->phys_bits);
return;
}
} else {
if (cpu->phys_bits && cpu->phys_bits != TCG_PHYS_ADDR_BITS) {
error_setg(errp, "TCG only supports phys-bits=%u",
TCG_PHYS_ADDR_BITS);
return;
}
}
/* 0 means it was not explicitly set by the user (or by machine
* compat_props or by the host code above). In this case, the default
* is the value used by TCG (40).
*/
if (cpu->phys_bits == 0) {
cpu->phys_bits = TCG_PHYS_ADDR_BITS;
}
} else {
/* For 32 bit systems don't use the user set value, but keep
* phys_bits consistent with what we tell the guest.
*/
if (cpu->phys_bits != 0) {
error_setg(errp, "phys-bits is not user-configurable in 32 bit");
return;
}
if (env->features[FEAT_1_EDX] & CPUID_PSE36) {
cpu->phys_bits = 36;
} else {
cpu->phys_bits = 32;
}
}
cpu_exec_init(cs, &error_abort);
if (tcg_enabled()) {
@ -3072,6 +3114,21 @@ out:
}
}
static void x86_cpu_unrealizefn(DeviceState *dev, Error **errp)
{
X86CPU *cpu = X86_CPU(dev);
#ifndef CONFIG_USER_ONLY
cpu_remove_sync(CPU(dev));
qemu_unregister_reset(x86_cpu_machine_reset_cb, dev);
#endif
if (cpu->apic_state) {
object_unparent(OBJECT(cpu->apic_state));
cpu->apic_state = NULL;
}
}
typedef struct BitProperty {
uint32_t *ptr;
uint32_t mask;
@ -3207,9 +3264,6 @@ static void x86_cpu_initfn(Object *obj)
object_property_add(obj, "tsc-frequency", "int",
x86_cpuid_get_tsc_freq,
x86_cpuid_set_tsc_freq, NULL, NULL, NULL);
object_property_add(obj, "apic-id", "int",
x86_cpuid_get_apic_id,
x86_cpuid_set_apic_id, NULL, NULL, NULL);
object_property_add(obj, "feature-words", "X86CPUFeatureWordInfo",
x86_cpu_get_feature_words,
NULL, NULL, (void *)env->features, NULL);
@ -3219,11 +3273,6 @@ static void x86_cpu_initfn(Object *obj)
cpu->hyperv_spinlock_attempts = HYPERV_SPINLOCK_NEVER_RETRY;
#ifndef CONFIG_USER_ONLY
/* Any code creating new X86CPU objects have to set apic-id explicitly */
cpu->apic_id = -1;
#endif
for (w = 0; w < FEATURE_WORDS; w++) {
int bitnr;
@ -3280,6 +3329,18 @@ static bool x86_cpu_has_work(CPUState *cs)
}
static Property x86_cpu_properties[] = {
#ifdef CONFIG_USER_ONLY
/* apic_id = 0 by default for *-user, see commit 9886e834 */
DEFINE_PROP_UINT32("apic-id", X86CPU, apic_id, 0),
DEFINE_PROP_INT32("thread-id", X86CPU, thread_id, 0),
DEFINE_PROP_INT32("core-id", X86CPU, core_id, 0),
DEFINE_PROP_INT32("socket-id", X86CPU, socket_id, 0),
#else
DEFINE_PROP_UINT32("apic-id", X86CPU, apic_id, UNASSIGNED_APIC_ID),
DEFINE_PROP_INT32("thread-id", X86CPU, thread_id, -1),
DEFINE_PROP_INT32("core-id", X86CPU, core_id, -1),
DEFINE_PROP_INT32("socket-id", X86CPU, socket_id, -1),
#endif
DEFINE_PROP_BOOL("pmu", X86CPU, enable_pmu, false),
{ .name = "hv-spinlocks", .info = &qdev_prop_spinlocks },
DEFINE_PROP_BOOL("hv-relaxed", X86CPU, hyperv_relaxed_timing, false),
@ -3294,6 +3355,9 @@ static Property x86_cpu_properties[] = {
DEFINE_PROP_BOOL("check", X86CPU, check_cpuid, true),
DEFINE_PROP_BOOL("enforce", X86CPU, enforce_cpuid, false),
DEFINE_PROP_BOOL("kvm", X86CPU, expose_kvm, true),
DEFINE_PROP_UINT32("phys-bits", X86CPU, phys_bits, 0),
DEFINE_PROP_BOOL("host-phys-bits", X86CPU, host_phys_bits, false),
DEFINE_PROP_BOOL("fill-mtrr-mask", X86CPU, fill_mtrr_mask, true),
DEFINE_PROP_UINT32("level", X86CPU, env.cpuid_level, 0),
DEFINE_PROP_UINT32("xlevel", X86CPU, env.cpuid_xlevel, 0),
DEFINE_PROP_UINT32("xlevel2", X86CPU, env.cpuid_xlevel2, 0),
@ -3311,6 +3375,7 @@ static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
xcc->parent_realize = dc->realize;
dc->realize = x86_cpu_realizefn;
dc->unrealize = x86_cpu_unrealizefn;
dc->props = x86_cpu_properties;
xcc->parent_reset = cc->reset;
@ -3347,6 +3412,7 @@ static void x86_cpu_common_class_init(ObjectClass *oc, void *data)
cc->cpu_exec_enter = x86_cpu_exec_enter;
cc->cpu_exec_exit = x86_cpu_exec_exit;
dc->cannot_instantiate_with_device_add_yet = false;
/*
* Reason: x86_cpu_initfn() calls cpu_exec_init(), which saves the
* object in cpus -> dangling pointer after final object_unref().

28
target-i386/cpu.h
View File

@ -616,8 +616,10 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_0_EBX_AVX512ER (1U << 27) /* AVX-512 Exponential and Reciprocal */
#define CPUID_7_0_EBX_AVX512CD (1U << 28) /* AVX-512 Conflict Detection */
#define CPUID_7_0_ECX_UMIP (1U << 2)
#define CPUID_7_0_ECX_PKU (1U << 3)
#define CPUID_7_0_ECX_OSPKE (1U << 4)
#define CPUID_7_0_ECX_RDPID (1U << 22)
#define CPUID_XSAVE_XSAVEOPT (1U << 0)
#define CPUID_XSAVE_XSAVEC (1U << 1)
@ -845,6 +847,11 @@ typedef struct {
#define NB_OPMASK_REGS 8
/* CPU can't have 0xFFFFFFFF APIC ID, use that value to distinguish
* that APIC ID hasn't been set yet
*/
#define UNASSIGNED_APIC_ID 0xFFFFFFFF
typedef union X86LegacyXSaveArea {
struct {
uint16_t fcw;
@ -1174,7 +1181,7 @@ struct X86CPU {
bool expose_kvm;
bool migratable;
bool host_features;
int64_t apic_id;
uint32_t apic_id;
/* if true the CPUID code directly forward host cache leaves to the guest */
bool cache_info_passthrough;
@ -1198,6 +1205,15 @@ struct X86CPU {
/* Compatibility bits for old machine types: */
bool enable_cpuid_0xb;
/* if true fill the top bits of the MTRR_PHYSMASKn variable range */
bool fill_mtrr_mask;
/* if true override the phys_bits value with a value read from the host */
bool host_phys_bits;
/* Number of physical address bits supported */
uint32_t phys_bits;
/* in order to simplify APIC support, we leave this pointer to the
user */
struct DeviceState *apic_state;
@ -1205,6 +1221,10 @@ struct X86CPU {
Notifier machine_done;
struct kvm_msrs *kvm_msr_buf;
int32_t socket_id;
int32_t core_id;
int32_t thread_id;
};
static inline X86CPU *x86_env_get_cpu(CPUX86State *env)
@ -1419,11 +1439,13 @@ uint64_t cpu_get_tsc(CPUX86State *env);
/* XXX: This value should match the one returned by CPUID
* and in exec.c */
# if defined(TARGET_X86_64)
# define PHYS_ADDR_MASK 0xffffffffffLL
# define TCG_PHYS_ADDR_BITS 40
# else
# define PHYS_ADDR_MASK 0xfffffffffLL
# define TCG_PHYS_ADDR_BITS 36
# endif
#define PHYS_ADDR_MASK MAKE_64BIT_MASK(0, TCG_PHYS_ADDR_BITS)
#define cpu_init(cpu_model) CPU(cpu_x86_init(cpu_model))
#define cpu_signal_handler cpu_x86_signal_handler

39
target-i386/kvm.c
View File

@ -1716,6 +1716,8 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
}
}
if (has_msr_mtrr) {
uint64_t phys_mask = MAKE_64BIT_MASK(0, cpu->phys_bits);
kvm_msr_entry_add(cpu, MSR_MTRRdefType, env->mtrr_deftype);
kvm_msr_entry_add(cpu, MSR_MTRRfix64K_00000, env->mtrr_fixed[0]);
kvm_msr_entry_add(cpu, MSR_MTRRfix16K_80000, env->mtrr_fixed[1]);
@ -1729,10 +1731,15 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F0000, env->mtrr_fixed[9]);
kvm_msr_entry_add(cpu, MSR_MTRRfix4K_F8000, env->mtrr_fixed[10]);
for (i = 0; i < MSR_MTRRcap_VCNT; i++) {
/* The CPU GPs if we write to a bit above the physical limit of
* the host CPU (and KVM emulates that)
*/
uint64_t mask = env->mtrr_var[i].mask;
mask &= phys_mask;
kvm_msr_entry_add(cpu, MSR_MTRRphysBase(i),
env->mtrr_var[i].base);
kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i),
env->mtrr_var[i].mask);
kvm_msr_entry_add(cpu, MSR_MTRRphysMask(i), mask);
}
}
@ -1970,6 +1977,7 @@ static int kvm_get_msrs(X86CPU *cpu)
CPUX86State *env = &cpu->env;
struct kvm_msr_entry *msrs = cpu->kvm_msr_buf->entries;
int ret, i;
uint64_t mtrr_top_bits;
kvm_msr_buf_reset(cpu);
@ -2122,6 +2130,30 @@ static int kvm_get_msrs(X86CPU *cpu)
}
assert(ret == cpu->kvm_msr_buf->nmsrs);
/*
* MTRR masks: Each mask consists of 5 parts
* a 10..0: must be zero
* b 11 : valid bit
* c n-1.12: actual mask bits
* d 51..n: reserved must be zero
* e 63.52: reserved must be zero
*
* 'n' is the number of physical bits supported by the CPU and is
* apparently always <= 52. We know our 'n' but don't know what
* the destinations 'n' is; it might be smaller, in which case
* it masks (c) on loading. It might be larger, in which case
* we fill 'd' so that d..c is consistent irrespetive of the 'n'
* we're migrating to.
*/
if (cpu->fill_mtrr_mask) {
QEMU_BUILD_BUG_ON(TARGET_PHYS_ADDR_SPACE_BITS > 52);
assert(cpu->phys_bits <= TARGET_PHYS_ADDR_SPACE_BITS);
mtrr_top_bits = MAKE_64BIT_MASK(cpu->phys_bits, 52 - cpu->phys_bits);
} else {
mtrr_top_bits = 0;
}
for (i = 0; i < ret; i++) {
uint32_t index = msrs[i].index;
switch (index) {
@ -2320,7 +2352,8 @@ static int kvm_get_msrs(X86CPU *cpu)
break;
case MSR_MTRRphysBase(0) ... MSR_MTRRphysMask(MSR_MTRRcap_VCNT - 1):
if (index & 1) {
env->mtrr_var[MSR_MTRRphysIndex(index)].mask = msrs[i].data;
env->mtrr_var[MSR_MTRRphysIndex(index)].mask = msrs[i].data |
mtrr_top_bits;
} else {
env->mtrr_var[MSR_MTRRphysIndex(index)].base = msrs[i].data;
}