[Qemu-devel] [RFC 22/42] pc: piix4: initialize new CPU hotplug hw

[Igor Mammedov <imammedo@redhat.com>]

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/acpi/piix4.c      | 51 +++++++++++++++++++++++++++++++++++++++++++++------
 hw/i386/pc_piix.c    |  2 +-
 hw/mips/mips_malta.c |  2 +-
 include/hw/i386/pc.h |  3 ++-
 4 files changed, 49 insertions(+), 9 deletions(-)

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 8f53b30..2246c65 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -34,6 +34,7 @@
 #include "hw/acpi/piix4.h"
 #include "hw/acpi/pcihp.h"
 #include "hw/acpi/cpu_hotplug.h"
+#include "hw/acpi/cpu.h"
 #include "hw/hotplug.h"
 #include "hw/mem/pc-dimm.h"
 #include "hw/acpi/memory_hotplug.h"
@@ -86,7 +87,10 @@ typedef struct PIIX4PMState {
     uint8_t s4_val;
 
     bool cpu_hotplug_legacy;
-    AcpiCpuHotplug gpe_cpu;
+    union {
+        AcpiCpuHotplug legacy; /* used for keeping legacy state */
+        CPUHotplugState state;
+    } cpuhp;
 
     MemHotplugState acpi_memory_hotplug;
 } PIIX4PMState;
@@ -273,6 +277,24 @@ static const VMStateDescription vmstate_memhp_state = {
     }
 };
 
+static bool vmstate_test_use_cpuhp(void *opaque)
+{
+    PIIX4PMState *s = opaque;
+    return !s->cpu_hotplug_legacy && s->cpuhp.state.is_enabled;
+}
+
+static const VMStateDescription vmstate_cpuhp_state = {
+    .name = "piix4_pm/cpuhp",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .needed = vmstate_test_use_cpuhp,
+    .fields      = (VMStateField[]) {
+        VMSTATE_CPU_HOTPLUG(cpuhp.state, PIIX4PMState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 /* qemu-kvm 1.2 uses version 3 but advertised as 2
  * To support incoming qemu-kvm 1.2 migration, change version_id
  * and minimum_version_id to 2 below (which breaks migration from
@@ -307,6 +329,7 @@ static const VMStateDescription vmstate_acpi = {
     },
     .subsections = (const VMStateDescription*[]) {
          &vmstate_memhp_state,
+         &vmstate_cpuhp_state,
          NULL
     }
 };
@@ -351,9 +374,12 @@ static void piix4_device_plug_cb(HotplugHandler *hotplug_dev,
         acpi_memory_plug_cb(hotplug_dev, &s->acpi_memory_hotplug, dev, errp);
     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
         acpi_pcihp_device_plug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp);
-    } else if (s->cpu_hotplug_legacy &&
-               object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
-        legacy_acpi_cpu_plug_cb(hotplug_dev, &s->gpe_cpu, dev, errp);
+    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
+        if (s->cpu_hotplug_legacy) {
+            legacy_acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp.legacy, dev, errp);
+        } else {
+            acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp.state, dev, errp);
+        }
     } else {
         error_setg(errp, "acpi: device plug request for not supported device"
                    " type: %s", object_get_typename(OBJECT(dev)));
@@ -372,6 +398,9 @@ static void piix4_device_unplug_request_cb(HotplugHandler *hotplug_dev,
     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
         acpi_pcihp_device_unplug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev,
                                     errp);
+    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
+               !s->cpu_hotplug_legacy) {
+            acpi_cpu_unplug_request_cb(hotplug_dev, &s->cpuhp.state, dev, errp);
     } else {
         error_setg(errp, "acpi: device unplug request for not supported device"
                    " type: %s", object_get_typename(OBJECT(dev)));
@@ -386,6 +415,9 @@ static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
     if (s->acpi_memory_hotplug.is_enabled &&
         object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
         acpi_memory_unplug_cb(&s->acpi_memory_hotplug, dev, errp);
+    } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) &&
+               !s->cpu_hotplug_legacy) {
+            acpi_cpu_unplug_cb(&s->cpuhp.state, dev, errp);
     } else {
         error_setg(errp, "acpi: device unplug for not supported device"
                    " type: %s", object_get_typename(OBJECT(dev)));
@@ -507,13 +539,15 @@ Object *piix4_pm_find(void)
 
 I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
                       qemu_irq sci_irq, qemu_irq smi_irq,
-                      int smm_enabled, DeviceState **piix4_pm)
+                      int smm_enabled, DeviceState **piix4_pm,
+                      bool cpuhp_enabled)
 {
     DeviceState *dev;
     PIIX4PMState *s;
 
     dev = DEVICE(pci_create(bus, devfn, TYPE_PIIX4_PM));
     qdev_prop_set_uint32(dev, "smb_io_base", smb_io_base);
+    qdev_prop_set_bit(dev, "cpu-hotplug", cpuhp_enabled);
     if (piix4_pm) {
         *piix4_pm = dev;
     }
@@ -572,8 +606,11 @@ static void piix4_acpi_system_hot_add_init(MemoryRegion *parent,
                     s->use_acpi_pci_hotplug);
 
     if (s->cpu_hotplug_legacy) {
-        legacy_acpi_cpu_hotplug_init(parent, OBJECT(s), &s->gpe_cpu,
+        legacy_acpi_cpu_hotplug_init(parent, OBJECT(s), &s->cpuhp.legacy,
                                      PIIX4_CPU_HOTPLUG_IO_BASE);
+    } else if (s->cpuhp.state.is_enabled) {
+        cpu_hotplug_hw_init(parent, OBJECT(s), &s->cpuhp.state,
+                            PIIX4_CPU_HOTPLUG_IO_BASE);
     }
 
     if (s->acpi_memory_hotplug.is_enabled) {
@@ -606,6 +643,8 @@ static Property piix4_pm_properties[] = {
                      acpi_memory_hotplug.is_enabled, true),
     DEFINE_PROP_BOOL("cpu-hotplug-legacy", PIIX4PMState,
                      cpu_hotplug_legacy, false),
+    DEFINE_PROP_BOOL("cpu-hotplug", PIIX4PMState,
+                     cpuhp.state.is_enabled, false),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index cdbdd69..860a83d 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -259,7 +259,7 @@ static void pc_init1(MachineState *machine,
         smbus = piix4_pm_init(pci_bus, piix3_devfn + 3, 0xb100,
                               gsi[9], smi_irq,
                               pc_machine_is_smm_enabled(pcms),
-                              &piix4_pm);
+                              &piix4_pm, machine->cpu_hotplug);
         smbus_eeprom_init(smbus, 8, NULL, 0);
 
         object_property_add_link(OBJECT(machine), PC_MACHINE_ACPI_DEVICE_PROP,
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
index fa769e5..3f61e38 100644
--- a/hw/mips/mips_malta.c
+++ b/hw/mips/mips_malta.c
@@ -1208,7 +1208,7 @@ void mips_malta_init(MachineState *machine)
     pci_piix4_ide_init(pci_bus, hd, piix4_devfn + 1);
     pci_create_simple(pci_bus, piix4_devfn + 2, "piix4-usb-uhci");
     smbus = piix4_pm_init(pci_bus, piix4_devfn + 3, 0x1100,
-                          isa_get_irq(NULL, 9), NULL, 0, NULL);
+                          isa_get_irq(NULL, 9), NULL, 0, NULL, NULL);
     smbus_eeprom_init(smbus, 8, smbus_eeprom_buf, smbus_eeprom_size);
     g_free(smbus_eeprom_buf);
     pit = pit_init(isa_bus, 0x40, 0, NULL);
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index f1e40ae..43aeebb 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -275,7 +275,8 @@ int cmos_get_fd_drive_type(FloppyDriveType fd0);
 
 I2CBus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
                       qemu_irq sci_irq, qemu_irq smi_irq,
-                      int smm_enabled, DeviceState **piix4_pm);
+                      int smm_enabled, DeviceState **piix4_pm,
+                      bool cpuhp_enabled);
 void piix4_smbus_register_device(SMBusDevice *dev, uint8_t addr);
 
 /* hpet.c */
-- 
1.8.3.1