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[Qemu-devel] [PULL 009/103] pc: implement pc-dimm device abstraction
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL 009/103] pc: implement pc-dimm device abstraction |
Date: |
Tue, 17 Jun 2014 20:36:47 +0300 |
From: Vasilis Liaskovitis <address@hidden>
Each hotplug-able memory slot is a PCDIMMDevice.
A hot-add operation for a memory device:
- creates a new PCDIMMDevice and makes hotplug controller to map it into
guest address space
Hotplug operations are done through normal device_add commands.
For migration case, all hotplugged memory devices on source should be
specified on target's command line using '-device' option with
properties set to the same values as on source.
To simplify review, patch introduces only PCDIMMDevice QOM skeleton that
will be extended by following patches to implement actual memory hotplug
and related functions.
Signed-off-by: Vasilis Liaskovitis <address@hidden>
Signed-off-by: Igor Mammedov <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
include/hw/mem/pc-dimm.h | 73 ++++++++++++++++++++++++++++
hw/mem/pc-dimm.c | 99 ++++++++++++++++++++++++++++++++++++++
default-configs/i386-softmmu.mak | 1 +
default-configs/x86_64-softmmu.mak | 1 +
hw/Makefile.objs | 1 +
hw/mem/Makefile.objs | 1 +
6 files changed, 176 insertions(+)
create mode 100644 include/hw/mem/pc-dimm.h
create mode 100644 hw/mem/pc-dimm.c
create mode 100644 hw/mem/Makefile.objs
diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h
new file mode 100644
index 0000000..e1f5ca4
--- /dev/null
+++ b/include/hw/mem/pc-dimm.h
@@ -0,0 +1,73 @@
+/*
+ * PC DIMM device
+ *
+ * Copyright ProfitBricks GmbH 2012
+ * Copyright (C) 2013-2014 Red Hat Inc
+ *
+ * Authors:
+ * Vasilis Liaskovitis <address@hidden>
+ * Igor Mammedov <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_PC_DIMM_H
+#define QEMU_PC_DIMM_H
+
+#include "exec/memory.h"
+#include "sysemu/hostmem.h"
+#include "hw/qdev.h"
+
+#define DEFAULT_PC_DIMMSIZE (1024*1024*1024)
+
+#define TYPE_PC_DIMM "pc-dimm"
+#define PC_DIMM(obj) \
+ OBJECT_CHECK(PCDIMMDevice, (obj), TYPE_PC_DIMM)
+#define PC_DIMM_CLASS(oc) \
+ OBJECT_CLASS_CHECK(PCDIMMDeviceClass, (oc), TYPE_PC_DIMM)
+#define PC_DIMM_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(PCDIMMDeviceClass, (obj), TYPE_PC_DIMM)
+
+#define PC_DIMM_ADDR_PROP "addr"
+#define PC_DIMM_SLOT_PROP "slot"
+#define PC_DIMM_NODE_PROP "node"
+#define PC_DIMM_SIZE_PROP "size"
+#define PC_DIMM_MEMDEV_PROP "memdev"
+
+#define PC_DIMM_UNASSIGNED_SLOT -1
+
+/**
+ * PCDIMMDevice:
+ * @addr: starting guest physical address, where @PCDIMMDevice is mapped.
+ * Default value: 0, means that address is auto-allocated.
+ * @node: numa node to which @PCDIMMDevice is attached.
+ * @slot: slot number into which @PCDIMMDevice is plugged in.
+ * Default value: -1, means that slot is auto-allocated.
+ * @hostmem: host memory backend providing memory for @PCDIMMDevice
+ */
+typedef struct PCDIMMDevice {
+ /* private */
+ DeviceState parent_obj;
+
+ /* public */
+ ram_addr_t addr;
+ uint32_t node;
+ int32_t slot;
+ HostMemoryBackend *hostmem;
+} PCDIMMDevice;
+
+/**
+ * PCDIMMDeviceClass:
+ * @get_memory_region: returns #MemoryRegion associated with @dimm
+ */
+typedef struct PCDIMMDeviceClass {
+ /* private */
+ DeviceClass parent_class;
+
+ /* public */
+ MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm);
+} PCDIMMDeviceClass;
+
+#endif
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
new file mode 100644
index 0000000..b4937fe
--- /dev/null
+++ b/hw/mem/pc-dimm.c
@@ -0,0 +1,99 @@
+/*
+ * Dimm device for Memory Hotplug
+ *
+ * Copyright ProfitBricks GmbH 2012
+ * Copyright (C) 2014 Red Hat Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "hw/mem/pc-dimm.h"
+#include "qemu/config-file.h"
+#include "qapi/visitor.h"
+
+static Property pc_dimm_properties[] = {
+ DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0),
+ DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0),
+ DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot,
+ PC_DIMM_UNASSIGNED_SLOT),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pc_dimm_get_size(Object *obj, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ int64_t value;
+ MemoryRegion *mr;
+ PCDIMMDevice *dimm = PC_DIMM(obj);
+
+ mr = host_memory_backend_get_memory(dimm->hostmem, errp);
+ value = memory_region_size(mr);
+
+ visit_type_int(v, &value, name, errp);
+}
+
+static void pc_dimm_init(Object *obj)
+{
+ PCDIMMDevice *dimm = PC_DIMM(obj);
+
+ object_property_add(obj, PC_DIMM_SIZE_PROP, "int", pc_dimm_get_size,
+ NULL, NULL, NULL, &error_abort);
+ object_property_add_link(obj, PC_DIMM_MEMDEV_PROP, TYPE_MEMORY_BACKEND,
+ (Object **)&dimm->hostmem,
+ qdev_prop_allow_set_link_before_realize,
+ OBJ_PROP_LINK_UNREF_ON_RELEASE,
+ &error_abort);
+}
+
+static void pc_dimm_realize(DeviceState *dev, Error **errp)
+{
+ PCDIMMDevice *dimm = PC_DIMM(dev);
+
+ if (!dimm->hostmem) {
+ error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
+ return;
+ }
+}
+
+static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm)
+{
+ return host_memory_backend_get_memory(dimm->hostmem, &error_abort);
+}
+
+static void pc_dimm_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
+
+ dc->realize = pc_dimm_realize;
+ dc->props = pc_dimm_properties;
+
+ ddc->get_memory_region = pc_dimm_get_memory_region;
+}
+
+static TypeInfo pc_dimm_info = {
+ .name = TYPE_PC_DIMM,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(PCDIMMDevice),
+ .instance_init = pc_dimm_init,
+ .class_init = pc_dimm_class_init,
+ .class_size = sizeof(PCDIMMDeviceClass),
+};
+
+static void pc_dimm_register_types(void)
+{
+ type_register_static(&pc_dimm_info);
+}
+
+type_init(pc_dimm_register_types)
diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 37ef90f..8e08841 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -44,3 +44,4 @@ CONFIG_APIC=y
CONFIG_IOAPIC=y
CONFIG_ICC_BUS=y
CONFIG_PVPANIC=y
+CONFIG_MEM_HOTPLUG=y
diff --git a/default-configs/x86_64-softmmu.mak
b/default-configs/x86_64-softmmu.mak
index 31bddce..66557ac 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -44,3 +44,4 @@ CONFIG_APIC=y
CONFIG_IOAPIC=y
CONFIG_ICC_BUS=y
CONFIG_PVPANIC=y
+CONFIG_MEM_HOTPLUG=y
diff --git a/hw/Makefile.objs b/hw/Makefile.objs
index d178b65..52a1464 100644
--- a/hw/Makefile.objs
+++ b/hw/Makefile.objs
@@ -29,6 +29,7 @@ devices-dirs-$(CONFIG_SOFTMMU) += usb/
devices-dirs-$(CONFIG_VIRTIO) += virtio/
devices-dirs-$(CONFIG_SOFTMMU) += watchdog/
devices-dirs-$(CONFIG_SOFTMMU) += xen/
+devices-dirs-$(CONFIG_MEM_HOTPLUG) += mem/
devices-dirs-y += core/
common-obj-y += $(devices-dirs-y)
obj-y += $(devices-dirs-y)
diff --git a/hw/mem/Makefile.objs b/hw/mem/Makefile.objs
new file mode 100644
index 0000000..b000fb4
--- /dev/null
+++ b/hw/mem/Makefile.objs
@@ -0,0 +1 @@
+common-obj-$(CONFIG_MEM_HOTPLUG) += pc-dimm.o
--
MST
- [Qemu-devel] [PULL 006/103] vl.c: extend -m option to support options for memory hotplug, (continued)
- [Qemu-devel] [PULL 006/103] vl.c: extend -m option to support options for memory hotplug, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 007/103] qdev: hotplug for buss-less devices, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 002/103] pc: ACPI BIOS: use enum for defining memory affinity flags, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 008/103] qdev: expose DeviceState.hotplugged field as a property, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 011/103] pc-dimm: do not allow to set already used memdev, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 010/103] memory: add memory_region_is_mapped() API, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 009/103] pc: implement pc-dimm device abstraction,
Michael S. Tsirkin <=
- [Qemu-devel] [PULL 014/103] pc: add 'etc/reserved-memory-end' fw_cfg interface for SeaBIOS, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 015/103] pc: exit QEMU if compat machine doesn't support memory hotlpug, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 013/103] pc: exit QEMU if number of slots more than supported 256, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 017/103] pc-dimm: add busy address check and address auto-allocation, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 018/103] pc-dimm: add busy slot check and slot auto-allocation, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 019/103] acpi: rename cpu_hotplug_defs.h to pc-hotplug.h, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 020/103] acpi: memory hotplug ACPI hardware implementation, Michael S. Tsirkin, 2014/06/17
- [Qemu-devel] [PULL 021/103] trace: add acpi memory hotplug IO region events, Michael S. Tsirkin, 2014/06/17