It allows APIC to be hotplugged
* map APIC's mmio at board level if it is present
* do not register mmio region for each APIC, since
only one is used/mapped
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
v2:
* various style fixes
* split out sysbus.h inclusion in kvmvapic.c to simplify review
* squash pc_new_cpu() hunk into "introduce apic-id property" patch
to simplify review
* use qdev_get_parent_bus() to get icc-bus for apic
---
hw/cpu/icc_bus.c | 10 ++++++++++
hw/i386/pc.c | 14 +++++++++++++-
hw/intc/apic_common.c | 18 ++++++++++++------
include/hw/cpu/icc_bus.h | 4 ++++
include/hw/i386/apic_internal.h | 6 +++---
target-i386/cpu.c | 16 +++-------------
6 files changed, 45 insertions(+), 23 deletions(-)
diff --git a/hw/cpu/icc_bus.c b/hw/cpu/icc_bus.c
index f6091b9..9715e07 100644
--- a/hw/cpu/icc_bus.c
+++ b/hw/cpu/icc_bus.c
@@ -75,6 +75,7 @@ typedef struct ICCBridgeState {
/*< private >*/
SysBusDevice parent_obj;
ICCBus icc_bus;
+ MemoryRegion apic_container;
} ICCBridgeState;
#define ICC_BRIGDE(obj) OBJECT_CHECK(ICCBridgeState, (obj), TYPE_ICC_BRIDGE)
@@ -82,8 +83,17 @@ typedef struct ICCBridgeState {
static void icc_bridge_init(Object *obj)
{
ICCBridgeState *s = ICC_BRIGDE(obj);
+ SysBusDevice *sb = SYS_BUS_DEVICE(obj);
qbus_create_inplace(&s->icc_bus, TYPE_ICC_BUS, DEVICE(s), "icc-bus");
+
+ /* Do not change order of registering regions,
+ * APIC must be first registered region, board maps it by 0 index
+ */
+ memory_region_init(&s->apic_container, "icc-apic-container",
+ APIC_SPACE_SIZE);
+ sysbus_init_mmio(sb, &s->apic_container);
+ s->icc_bus.apic_address_space = &s->apic_container;
}
static const TypeInfo icc_bridge_info = {
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 30ec338..a09b7ee 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -53,6 +53,7 @@
#include "qemu/bitmap.h"
#include "qemu/config-file.h"
#include "hw/acpi/acpi.h"
+#include "hw/cpu/icc_bus.h"
/* debug PC/ISA interrupts */
//#define DEBUG_IRQ
@@ -916,7 +917,9 @@ static X86CPU *pc_new_cpu(const char *cpu_model, int64_t
apic_id, Error **errp)
void pc_cpus_init(const char *cpu_model)
{
int i;
+ X86CPU *cpu = NULL;
Error *error = NULL;
+ SysBusDevice *icc_bridge;
/* init CPUs */
if (cpu_model == NULL) {
@@ -927,14 +930,23 @@ void pc_cpus_init(const char *cpu_model)
#endif
}
+ icc_bridge = SYS_BUS_DEVICE(object_resolve_path_type("icc-bridge",
+ TYPE_ICC_BRIDGE, NULL));
+
for (i = 0; i < smp_cpus; i++) {
- pc_new_cpu(cpu_model, x86_cpu_apic_id_from_index(i), &error);
+ cpu = pc_new_cpu(cpu_model, x86_cpu_apic_id_from_index(i), &error);
if (error) {
fprintf(stderr, "%s\n", error_get_pretty(error));
error_free(error);
exit(1);
}
}
+
+ /* map APIC MMIO area if CPU has APIC */
+ if (cpu && cpu->env.apic_state) {
+ /* XXX: what if the base changes? */
+ sysbus_mmio_map_overlap(icc_bridge, 0, APIC_DEFAULT_ADDRESS, 0x1000);
+ }
}
void pc_acpi_init(const char *default_dsdt)
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
index e0ae07a..b03e904 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -21,6 +21,8 @@
#include "hw/i386/apic_internal.h"
#include "trace.h"
#include "sysemu/kvm.h"
+#include "hw/qdev.h"
+#include "hw/sysbus.h"
static int apic_irq_delivered;
bool apic_report_tpr_access;
@@ -282,12 +284,13 @@ static int apic_load_old(QEMUFile *f, void *opaque, int
version_id)
return 0;
}
-static int apic_init_common(SysBusDevice *dev)
+static int apic_init_common(ICCDevice *dev)
{
APICCommonState *s = APIC_COMMON(dev);
APICCommonClass *info;
static DeviceState *vapic;
static int apic_no;
+ static bool mmio_registered;
if (apic_no >= MAX_APICS) {
return -1;
@@ -296,8 +299,11 @@ static int apic_init_common(SysBusDevice *dev)
info = APIC_COMMON_GET_CLASS(s);
info->init(s);
-
- sysbus_init_mmio(dev, &s->io_memory);
+ if (!mmio_registered) {
+ ICCBus *b = ICC_BUS(qdev_get_parent_bus(DEVICE(dev)));
+ memory_region_add_subregion(b->apic_address_space, 0, &s->io_memory);
+ mmio_registered = true;
+ }
/* Note: We need at least 1M to map the VAPIC option ROM */
if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK &&
@@ -375,19 +381,19 @@ static Property apic_properties_common[] = {
static void apic_common_class_init(ObjectClass *klass, void *data)
{
- SysBusDeviceClass *sc = SYS_BUS_DEVICE_CLASS(klass);
+ ICCDeviceClass *idc = ICC_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &vmstate_apic_common;
dc->reset = apic_reset_common;
dc->no_user = 1;
dc->props = apic_properties_common;
- sc->init = apic_init_common;
+ idc->init = apic_init_common;
}
static const TypeInfo apic_common_type = {
.name = TYPE_APIC_COMMON,
- .parent = TYPE_SYS_BUS_DEVICE,
+ .parent = TYPE_ICC_DEVICE,
.instance_size = sizeof(APICCommonState),
.class_size = sizeof(APICCommonClass),
.class_init = apic_common_class_init,
diff --git a/include/hw/cpu/icc_bus.h b/include/hw/cpu/icc_bus.h
index a0abc21..53ef223 100644
--- a/include/hw/cpu/icc_bus.h
+++ b/include/hw/cpu/icc_bus.h
@@ -22,6 +22,7 @@
#ifndef ICC_BUS_H
#define ICC_BUS_H
+#include "exec/memory.h"
#include "hw/qdev-core.h"
#define TYPE_ICC_BUS "icc-bus"
@@ -31,6 +32,9 @@
typedef struct ICCBus {
/*< private >*/
BusState parent_obj;
+
+ /*< public >*/
+ MemoryRegion *apic_address_space;
} ICCBus;
#define ICC_BUS(obj) OBJECT_CHECK(ICCBus, (obj), TYPE_ICC_BUS)
diff --git a/include/hw/i386/apic_internal.h b/include/hw/i386/apic_internal.h
index aac6290..1b0a7fb 100644
--- a/include/hw/i386/apic_internal.h
+++ b/include/hw/i386/apic_internal.h
@@ -21,7 +21,7 @@
#define QEMU_APIC_INTERNAL_H
#include "exec/memory.h"
-#include "hw/sysbus.h"
+#include "hw/cpu/icc_bus.h"
#include "qemu/timer.h"
/* APIC Local Vector Table */
@@ -78,7 +78,7 @@ typedef struct APICCommonState APICCommonState;
typedef struct APICCommonClass
{
- SysBusDeviceClass parent_class;
+ ICCDeviceClass parent_class;
void (*init)(APICCommonState *s);
void (*set_base)(APICCommonState *s, uint64_t val);
@@ -92,7 +92,7 @@ typedef struct APICCommonClass
} APICCommonClass;
struct APICCommonState {
- SysBusDevice busdev;
+ ICCDevice busdev;
MemoryRegion io_memory;
X86CPU *cpu;
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 8d3ad00..c648ea7 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -41,10 +41,10 @@
#endif
#include "sysemu/sysemu.h"
+#include "hw/qdev-properties.h"
#include "hw/cpu/icc_bus.h"
#ifndef CONFIG_USER_ONLY
#include "hw/xen/xen.h"
-#include "hw/sysbus.h"
#include "hw/i386/apic_internal.h"
#endif
@@ -2119,6 +2119,7 @@ static void mce_init(X86CPU *cpu)
static void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
{
CPUX86State *env = &cpu->env;
+ DeviceState *dev = DEVICE(cpu);
APICCommonState *apic;
const char *apic_type = "apic";
@@ -2128,7 +2129,7 @@ static void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
apic_type = "xen-apic";
}
- env->apic_state = qdev_try_create(NULL, apic_type);
+ env->apic_state = qdev_try_create(qdev_get_parent_bus(dev), apic_type);
if (env->apic_state == NULL) {
error_setg(errp, "APIC device '%s' could not be created", apic_type);
return;
@@ -2145,7 +2146,6 @@ static void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
{
CPUX86State *env = &cpu->env;
- static int apic_mapped;
if (env->apic_state == NULL) {
return;
@@ -2156,16 +2156,6 @@ static void x86_cpu_apic_realize(X86CPU *cpu, Error
**errp)
object_get_typename(OBJECT(env->apic_state)));
return;
}
-
- /* XXX: mapping more APICs at the same memory location */
- if (apic_mapped == 0) {
- /* NOTE: the APIC is directly connected to the CPU - it is not
- on the global memory bus. */
- /* XXX: what if the base changes? */
- sysbus_mmio_map_overlap(SYS_BUS_DEVICE(env->apic_state), 0,
- APIC_DEFAULT_ADDRESS, 0x1000);
- apic_mapped = 1;
- }
}
#else
static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
--
1.7.1
