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[Qemu-devel] [PATCH v7 2/3] cpu/apic: drop icc bus/bridge
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From: |
Zhu Guihua |
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Subject: |
[Qemu-devel] [PATCH v7 2/3] cpu/apic: drop icc bus/bridge |
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Date: |
Tue, 2 Jun 2015 17:23:56 +0800 |
From: Chen Fan <address@hidden>
After CPU hotplug has been converted to BUS-less hot-plug infrastructure,
the only function ICC bus performs is to propagate reset to LAPICs. However
LAPIC could be reset by registering its reset handler after all device are
initialized.
Do so and drop ~200LOC of not needed anymore ICCBus related code.
Signed-off-by: Chen Fan <address@hidden>
Signed-off-by: Zhu Guihua <address@hidden>
---
hw/i386/pc.c | 19 ++++---------------
hw/i386/pc_piix.c | 15 +++++++--------
hw/i386/pc_q35.c | 15 +++++++--------
hw/intc/apic_common.c | 5 ++---
include/hw/i386/apic_internal.h | 7 ++++---
include/hw/i386/pc.h | 2 +-
target-i386/cpu.c | 24 ++++++++++++++++--------
target-i386/cpu.h | 4 ++++
8 files changed, 45 insertions(+), 46 deletions(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 185e748..471320f 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -58,7 +58,6 @@
#include "qemu/config-file.h"
#include "hw/acpi/acpi.h"
#include "hw/acpi/cpu_hotplug.h"
-#include "hw/cpu/icc_bus.h"
#include "hw/boards.h"
#include "hw/pci/pci_host.h"
#include "acpi-build.h"
@@ -990,23 +989,16 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int
level)
}
static X86CPU *pc_new_cpu(const char *cpu_model, int64_t apic_id,
- DeviceState *icc_bridge, Error **errp)
+ Error **errp)
{
X86CPU *cpu = NULL;
Error *local_err = NULL;
- if (icc_bridge == NULL) {
- error_setg(&local_err, "Invalid icc-bridge value");
- goto out;
- }
-
cpu = cpu_x86_create(cpu_model, &local_err);
if (local_err != NULL) {
goto out;
}
- qdev_set_parent_bus(DEVICE(cpu), qdev_get_child_bus(icc_bridge, "icc"));
-
object_property_set_int(OBJECT(cpu), apic_id, "apic-id", &local_err);
object_property_set_bool(OBJECT(cpu), true, "realized", &local_err);
@@ -1023,7 +1015,6 @@ static const char *current_cpu_model;
void pc_hot_add_cpu(const int64_t id, Error **errp)
{
- DeviceState *icc_bridge;
X86CPU *cpu;
int64_t apic_id = x86_cpu_apic_id_from_index(id);
Error *local_err = NULL;
@@ -1052,9 +1043,7 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
return;
}
- icc_bridge = DEVICE(object_resolve_path_type("icc-bridge",
- TYPE_ICC_BRIDGE, NULL));
- cpu = pc_new_cpu(current_cpu_model, apic_id, icc_bridge, &local_err);
+ cpu = pc_new_cpu(current_cpu_model, apic_id, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
@@ -1062,7 +1051,7 @@ void pc_hot_add_cpu(const int64_t id, Error **errp)
object_unref(OBJECT(cpu));
}
-void pc_cpus_init(const char *cpu_model, DeviceState *icc_bridge)
+void pc_cpus_init(const char *cpu_model)
{
int i;
X86CPU *cpu = NULL;
@@ -1088,7 +1077,7 @@ void pc_cpus_init(const char *cpu_model, DeviceState
*icc_bridge)
for (i = 0; i < smp_cpus; i++) {
cpu = pc_new_cpu(cpu_model, x86_cpu_apic_id_from_index(i),
- icc_bridge, &error);
+ &error);
if (error) {
error_report_err(error);
exit(1);
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 212e263..5b1f77c 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -39,7 +39,6 @@
#include "hw/kvm/clock.h"
#include "sysemu/sysemu.h"
#include "hw/sysbus.h"
-#include "hw/cpu/icc_bus.h"
#include "sysemu/arch_init.h"
#include "sysemu/block-backend.h"
#include "hw/i2c/smbus.h"
@@ -98,7 +97,6 @@ static void pc_init1(MachineState *machine,
MemoryRegion *ram_memory;
MemoryRegion *pci_memory;
MemoryRegion *rom_memory;
- DeviceState *icc_bridge;
FWCfgState *fw_cfg = NULL;
PcGuestInfo *guest_info;
ram_addr_t lowmem;
@@ -143,11 +141,7 @@ static void pc_init1(MachineState *machine,
exit(1);
}
- icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
- object_property_add_child(qdev_get_machine(), "icc-bridge",
- OBJECT(icc_bridge), NULL);
-
- pc_cpus_init(machine->cpu_model, icc_bridge);
+ pc_cpus_init(machine->cpu_model);
if (kvm_enabled() && kvmclock_enabled) {
kvmclock_create();
@@ -230,7 +224,6 @@ static void pc_init1(MachineState *machine,
if (pci_enabled) {
ioapic_init_gsi(gsi_state, "i440fx");
}
- qdev_init_nofail(icc_bridge);
pc_register_ferr_irq(gsi[13]);
@@ -303,6 +296,12 @@ static void pc_init1(MachineState *machine,
if (pci_enabled) {
pc_pci_device_init(pci_bus);
}
+
+ /* since APIC is a bus-less device, propagate reset to it manually */
+ CPUState *cpu;
+ CPU_FOREACH(cpu) {
+ qemu_register_reset(x86_cpu_apic_reset, cpu);
+ }
}
static void pc_init_pci(MachineState *machine)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index e67f2de..6cb9445 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -43,7 +43,6 @@
#include "hw/ide/pci.h"
#include "hw/ide/ahci.h"
#include "hw/usb.h"
-#include "hw/cpu/icc_bus.h"
#include "qemu/error-report.h"
/* ICH9 AHCI has 6 ports */
@@ -85,7 +84,6 @@ static void pc_q35_init(MachineState *machine)
int i;
ICH9LPCState *ich9_lpc;
PCIDevice *ahci;
- DeviceState *icc_bridge;
PcGuestInfo *guest_info;
ram_addr_t lowmem;
DriveInfo *hd[MAX_SATA_PORTS];
@@ -132,11 +130,7 @@ static void pc_q35_init(MachineState *machine)
exit(1);
}
- icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
- object_property_add_child(qdev_get_machine(), "icc-bridge",
- OBJECT(icc_bridge), NULL);
-
- pc_cpus_init(machine->cpu_model, icc_bridge);
+ pc_cpus_init(machine->cpu_model);
pc_acpi_init("q35-acpi-dsdt.aml");
kvmclock_create();
@@ -240,7 +234,6 @@ static void pc_q35_init(MachineState *machine)
if (pci_enabled) {
ioapic_init_gsi(gsi_state, "q35");
}
- qdev_init_nofail(icc_bridge);
pc_register_ferr_irq(gsi[13]);
@@ -287,6 +280,12 @@ static void pc_q35_init(MachineState *machine)
if (pci_enabled) {
pc_pci_device_init(host_bus);
}
+
+ /* since APIC is a bus-less device, propagate reset to it manually */
+ CPUState *cpu;
+ CPU_FOREACH(cpu) {
+ qemu_register_reset(x86_cpu_apic_reset, cpu);
+ }
}
static void pc_compat_2_3(MachineState *machine)
diff --git a/hw/intc/apic_common.c b/hw/intc/apic_common.c
index f251787..aeee288 100644
--- a/hw/intc/apic_common.c
+++ b/hw/intc/apic_common.c
@@ -429,13 +429,12 @@ static Property apic_properties_common[] = {
static void apic_common_class_init(ObjectClass *klass, void *data)
{
- ICCDeviceClass *idc = ICC_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &vmstate_apic_common;
dc->reset = apic_reset_common;
dc->props = apic_properties_common;
- idc->realize = apic_common_realize;
+ dc->realize = apic_common_realize;
/*
* Reason: APIC and CPU need to be wired up by
* x86_cpu_apic_create()
@@ -445,7 +444,7 @@ static void apic_common_class_init(ObjectClass *klass, void
*data)
static const TypeInfo apic_common_type = {
.name = TYPE_APIC_COMMON,
- .parent = TYPE_ICC_DEVICE,
+ .parent = TYPE_DEVICE,
.instance_size = sizeof(APICCommonState),
.class_size = sizeof(APICCommonClass),
.class_init = apic_common_class_init,
diff --git a/include/hw/i386/apic_internal.h b/include/hw/i386/apic_internal.h
index dc7a89d..08d6f9b 100644
--- a/include/hw/i386/apic_internal.h
+++ b/include/hw/i386/apic_internal.h
@@ -21,7 +21,6 @@
#define QEMU_APIC_INTERNAL_H
#include "exec/memory.h"
-#include "hw/cpu/icc_bus.h"
#include "qemu/timer.h"
/* APIC Local Vector Table */
@@ -78,7 +77,7 @@ typedef struct APICCommonState APICCommonState;
typedef struct APICCommonClass
{
- ICCDeviceClass parent_class;
+ DeviceClass parent_class;
DeviceRealize realize;
void (*set_base)(APICCommonState *s, uint64_t val);
@@ -93,7 +92,9 @@ typedef struct APICCommonClass
} APICCommonClass;
struct APICCommonState {
- ICCDevice busdev;
+ /*< private >*/
+ DeviceState parent_obj;
+ /*< public >*/
MemoryRegion io_memory;
X86CPU *cpu;
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 1b35168..7c9d044 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -163,7 +163,7 @@ extern int fd_bootchk;
void pc_register_ferr_irq(qemu_irq irq);
void pc_acpi_smi_interrupt(void *opaque, int irq, int level);
-void pc_cpus_init(const char *cpu_model, DeviceState *icc_bridge);
+void pc_cpus_init(const char *cpu_model);
void pc_hot_add_cpu(const int64_t id, Error **errp);
void pc_acpi_init(const char *default_dsdt);
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index e38943e..e0d025a 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -42,7 +42,6 @@
#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/i386/apic_internal.h"
@@ -2718,7 +2717,6 @@ static void mce_init(X86CPU *cpu)
#ifndef CONFIG_USER_ONLY
static void x86_cpu_apic_create(X86CPU *cpu, Error **errp)
{
- DeviceState *dev = DEVICE(cpu);
APICCommonState *apic;
const char *apic_type = "apic";
@@ -2728,11 +2726,7 @@ static void x86_cpu_apic_create(X86CPU *cpu, Error
**errp)
apic_type = "xen-apic";
}
- cpu->apic_state = qdev_try_create(qdev_get_parent_bus(dev), apic_type);
- if (cpu->apic_state == NULL) {
- error_setg(errp, "APIC device '%s' could not be created", apic_type);
- return;
- }
+ cpu->apic_state = DEVICE(object_new(apic_type));
object_property_add_child(OBJECT(cpu), "apic",
OBJECT(cpu->apic_state), NULL);
@@ -2752,6 +2746,21 @@ static void x86_cpu_apic_realize(X86CPU *cpu, Error
**errp)
object_property_set_bool(OBJECT(cpu->apic_state), true, "realized",
errp);
}
+
+void x86_cpu_apic_reset(void *opaque)
+{
+ CPUState *cs = opaque;
+ X86CPU *cpu = X86_CPU(cs);
+ DeviceClass *dc;
+
+ if (cpu->apic_state) {
+ dc = DEVICE_GET_CLASS(cpu->apic_state);
+
+ if (dc->reset != NULL) {
+ (*dc->reset)(cpu->apic_state);
+ }
+ }
+}
#else
static void x86_cpu_apic_realize(X86CPU *cpu, Error **errp)
{
@@ -3091,7 +3100,6 @@ static void x86_cpu_common_class_init(ObjectClass *oc,
void *data)
xcc->parent_realize = dc->realize;
dc->realize = x86_cpu_realizefn;
- dc->bus_type = TYPE_ICC_BUS;
dc->props = x86_cpu_properties;
xcc->parent_reset = cc->reset;
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 4ee12ca..7a55a51 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -1105,6 +1105,10 @@ int x86_cpu_handle_mmu_fault(CPUState *cpu, vaddr addr,
int is_write, int mmu_idx);
void x86_cpu_set_a20(X86CPU *cpu, int a20_state);
+#ifndef CONFIG_USER_ONLY
+void x86_cpu_apic_reset(void *opaque);
+#endif
+
static inline bool hw_local_breakpoint_enabled(unsigned long dr7, int index)
{
return (dr7 >> (index * 2)) & 1;
--
1.9.3