From fdac831421d2f4d913e53cfca35358ced2534e5b Mon Sep 17 00:00:00 2001
From: Igor Mammedov <imammedo@redhat.com>
Date: Mon, 8 Jun 2015 00:52:02 +0200
Subject: [PATCH 046/217] acpi, mem-hotplug: add unplug cb for memory device
Message-id: <1433724727-46928-5-git-send-email-imammedo@redhat.com>
Patchwork-id: 65390
O-Subject: [RHEL-7.2 qemu-kvm-rhev PATCH 4/9] acpi, mem-hotplug: add unplug cb for memory device
Bugzilla: 1120706
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
RH-Acked-by: Andrew Jones <drjones@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
From: Tang Chen <tangchen@cn.fujitsu.com>
This patch adds unplug cb for memory device. It resets memory status
"is_enabled" in acpi_memory_unplug_cb(), removes the corresponding
memory region, unregisters vmstate, and unparents the object.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit f7d3e29db5a5900a1f0ed10f8313f7c3f28e5b59)
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
hw/acpi/ich9.c | 9 +++++++--
hw/acpi/memory_hotplug.c | 14 ++++++++++++++
hw/acpi/piix4.c | 11 +++++++++--
hw/i386/pc.c | 34 ++++++++++++++++++++++++++++++++--
include/hw/acpi/memory_hotplug.h | 2 ++
5 files changed, 64 insertions(+), 6 deletions(-)
diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
index b85eed4..84e5bb8 100644
--- a/hw/acpi/ich9.c
+++ b/hw/acpi/ich9.c
@@ -413,8 +413,13 @@ void ich9_pm_device_unplug_request_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
Error **errp)
{
- error_setg(errp, "acpi: device unplug for not supported device"
- " type: %s", object_get_typename(OBJECT(dev)));
+ if (pm->acpi_memory_hotplug.is_enabled &&
+ object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+ acpi_memory_unplug_cb(&pm->acpi_memory_hotplug, dev, errp);
+ } else {
+ error_setg(errp, "acpi: device unplug for not supported device"
+ " type: %s", object_get_typename(OBJECT(dev)));
+ }
}
void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list)
diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index 42fe668..07e281f 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -237,6 +237,20 @@ void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq irq,
acpi_update_sci(ar, irq);
}
+void acpi_memory_unplug_cb(MemHotplugState *mem_st,
+ DeviceState *dev, Error **errp)
+{
+ MemStatus *mdev;
+
+ mdev = acpi_memory_slot_status(mem_st, dev, errp);
+ if (!mdev) {
+ return;
+ }
+
+ mdev->is_enabled = false;
+ mdev->dimm = NULL;
+}
+
static const VMStateDescription vmstate_memhp_sts = {
.name = "memory hotplug device state",
.version_id = 1,
diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 66ecfca..d20c1e8 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -377,8 +377,15 @@ static void piix4_device_unplug_request_cb(HotplugHandler *hotplug_dev,
static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
- error_setg(errp, "acpi: device unplug for not supported device"
- " type: %s", object_get_typename(OBJECT(dev)));
+ PIIX4PMState *s = PIIX4_PM(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 {
+ error_setg(errp, "acpi: device unplug for not supported device"
+ " type: %s", object_get_typename(OBJECT(dev)));
+ }
}
static void piix4_update_bus_hotplug(PCIBus *pci_bus, void *opaque)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 2e3158a..a946976 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1699,6 +1699,32 @@ out:
error_propagate(errp, local_err);
}
+static void pc_dimm_unplug(HotplugHandler *hotplug_dev,
+ DeviceState *dev, Error **errp)
+{
+ PCMachineState *pcms = PC_MACHINE(hotplug_dev);
+ PCDIMMDevice *dimm = PC_DIMM(dev);
+ PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
+ MemoryRegion *mr = ddc->get_memory_region(dimm);
+ HotplugHandlerClass *hhc;
+ Error *local_err = NULL;
+
+ hhc = HOTPLUG_HANDLER_GET_CLASS(pcms->acpi_dev);
+ hhc->unplug(HOTPLUG_HANDLER(pcms->acpi_dev), dev, &local_err);
+
+ if (local_err) {
+ goto out;
+ }
+
+ memory_region_del_subregion(&pcms->hotplug_memory, mr);
+ vmstate_unregister_ram(mr, dev);
+
+ object_unparent(OBJECT(dev));
+
+ out:
+ error_propagate(errp, local_err);
+}
+
static void pc_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@@ -1752,8 +1778,12 @@ static void pc_machine_device_unplug_request_cb(HotplugHandler *hotplug_dev,
static void pc_machine_device_unplug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
- error_setg(errp, "acpi: device unplug for not supported device"
- " type: %s", object_get_typename(OBJECT(dev)));
+ if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+ pc_dimm_unplug(hotplug_dev, dev, errp);
+ } else {
+ error_setg(errp, "acpi: device unplug for not supported device"
+ " type: %s", object_get_typename(OBJECT(dev)));
+ }
}
static HotplugHandler *pc_get_hotpug_handler(MachineState *machine,
diff --git a/include/hw/acpi/memory_hotplug.h b/include/hw/acpi/memory_hotplug.h
index 9d7eee9..986223b 100644
--- a/include/hw/acpi/memory_hotplug.h
+++ b/include/hw/acpi/memory_hotplug.h
@@ -38,6 +38,8 @@ void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq irq,
MemHotplugState *mem_st,
DeviceState *dev, Error **errp);
+void acpi_memory_unplug_cb(MemHotplugState *mem_st,
+ DeviceState *dev, Error **errp);
extern const VMStateDescription vmstate_memory_hotplug;
#define VMSTATE_MEMORY_HOTPLUG(memhp, state) \
--
1.8.3.1