[v6,11/18] hw/arm/virt: Add memory hotplug framework
diff mbox series

Message ID 20190205173306.20483-12-eric.auger@redhat.com
State New
Headers show
Series
  • ARM virt: Initial RAM expansion and PCDIMM/NVDIMM support
Related show

Commit Message

Auger Eric Feb. 5, 2019, 5:32 p.m. UTC
This patch adds the the memory hot-plug/hot-unplug infrastructure
in machvirt. It is still not enabled as no device memory is allocated.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Signed-off-by: Kwangwoo Lee <kwangwoo.lee@sk.com>

---
v4 -> v5:
- change in pc_dimm_pre_plug signature
- CONFIG_MEM_HOTPLUG replaced by CONFIG_MEM_DEVICE and CONFIG_DIMM

v3 -> v4:
- check the memory device is not hotplugged

v2 -> v3:
- change in pc_dimm_plug()'s signature
- add pc_dimm_pre_plug call

v1 -> v2:
- s/virt_dimm_plug|unplug/virt_memory_plug|unplug
- s/pc_dimm_memory_plug/pc_dimm_plug
- reworded title and commit message
- added pre_plug cb
- don't handle get_memory_region failure anymore
---
 default-configs/arm-softmmu.mak |  2 ++
 hw/arm/virt.c                   | 64 ++++++++++++++++++++++++++++++++-
 2 files changed, 65 insertions(+), 1 deletion(-)

Comments

David Hildenbrand Feb. 14, 2019, 5:15 p.m. UTC | #1
On 05.02.19 18:32, Eric Auger wrote:
> This patch adds the the memory hot-plug/hot-unplug infrastructure
> in machvirt. It is still not enabled as no device memory is allocated.
> 
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
> Signed-off-by: Kwangwoo Lee <kwangwoo.lee@sk.com>
> 
> ---
> v4 -> v5:
> - change in pc_dimm_pre_plug signature
> - CONFIG_MEM_HOTPLUG replaced by CONFIG_MEM_DEVICE and CONFIG_DIMM
> 
> v3 -> v4:
> - check the memory device is not hotplugged
> 
> v2 -> v3:
> - change in pc_dimm_plug()'s signature
> - add pc_dimm_pre_plug call
> 
> v1 -> v2:
> - s/virt_dimm_plug|unplug/virt_memory_plug|unplug
> - s/pc_dimm_memory_plug/pc_dimm_plug
> - reworded title and commit message
> - added pre_plug cb
> - don't handle get_memory_region failure anymore
> ---
>  default-configs/arm-softmmu.mak |  2 ++
>  hw/arm/virt.c                   | 64 ++++++++++++++++++++++++++++++++-
>  2 files changed, 65 insertions(+), 1 deletion(-)
> 
> diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
> index be88870799..dc4624794f 100644
> --- a/default-configs/arm-softmmu.mak
> +++ b/default-configs/arm-softmmu.mak
> @@ -160,3 +160,5 @@ CONFIG_PCI_DESIGNWARE=y
>  CONFIG_STRONGARM=y
>  CONFIG_HIGHBANK=y
>  CONFIG_MUSICPAL=y
> +CONFIG_MEM_DEVICE=y
> +CONFIG_DIMM=y
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index f01886da22..783468ba77 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -59,6 +59,8 @@
>  #include "qapi/visitor.h"
>  #include "standard-headers/linux/input.h"
>  #include "hw/arm/smmuv3.h"
> +#include "hw/mem/pc-dimm.h"
> +#include "hw/mem/nvdimm.h"
>  
>  #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
>      static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
> @@ -1763,6 +1765,49 @@ static const CPUArchIdList *virt_possible_cpu_arch_ids(MachineState *ms)
>      return ms->possible_cpus;
>  }
>  
> +static void virt_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
> +                                 Error **errp)
> +{
> +    const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
> +
> +    if (dev->hotplugged) {
> +        error_setg(errp, "memory hotplug is not supported");
> +    }
> +
> +    if (is_nvdimm) {
> +        error_setg(errp, "nvdimm is not yet supported");
> +        return;
> +    }
> +
> +    pc_dimm_pre_plug(PC_DIMM(dev), MACHINE(hotplug_dev), NULL, errp);
> +}
> +
> +static void virt_memory_plug(HotplugHandler *hotplug_dev,
> +                             DeviceState *dev, Error **errp)
> +{
> +    VirtMachineState *vms = VIRT_MACHINE(hotplug_dev);
> +    Error *local_err = NULL;
> +
> +    pc_dimm_plug(PC_DIMM(dev), MACHINE(vms), &local_err);
> +
> +    error_propagate(errp, local_err);
> +}
> +
> +static void virt_memory_unplug(HotplugHandler *hotplug_dev,
> +                               DeviceState *dev, Error **errp)
> +{
> +    pc_dimm_unplug(PC_DIMM(dev), MACHINE(hotplug_dev));
> +    object_unparent(OBJECT(dev));

Please note that this will soon change with

[PATCH RFCv2 0/9] qdev: Hotplug handler chaining + virtio-pmem

What you'll have to do then is to replace the object_unparent by a

object_property_set_bool(OBJECT(dev), false, "realized", NULL);
Auger Eric Feb. 18, 2019, 6:10 p.m. UTC | #2
Hi David,

On 2/14/19 6:15 PM, David Hildenbrand wrote:
> On 05.02.19 18:32, Eric Auger wrote:
>> This patch adds the the memory hot-plug/hot-unplug infrastructure
>> in machvirt. It is still not enabled as no device memory is allocated.
>>
>> Signed-off-by: Eric Auger <eric.auger@redhat.com>
>> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
>> Signed-off-by: Kwangwoo Lee <kwangwoo.lee@sk.com>
>>
>> ---
>> v4 -> v5:
>> - change in pc_dimm_pre_plug signature
>> - CONFIG_MEM_HOTPLUG replaced by CONFIG_MEM_DEVICE and CONFIG_DIMM
>>
>> v3 -> v4:
>> - check the memory device is not hotplugged
>>
>> v2 -> v3:
>> - change in pc_dimm_plug()'s signature
>> - add pc_dimm_pre_plug call
>>
>> v1 -> v2:
>> - s/virt_dimm_plug|unplug/virt_memory_plug|unplug
>> - s/pc_dimm_memory_plug/pc_dimm_plug
>> - reworded title and commit message
>> - added pre_plug cb
>> - don't handle get_memory_region failure anymore
>> ---
>>  default-configs/arm-softmmu.mak |  2 ++
>>  hw/arm/virt.c                   | 64 ++++++++++++++++++++++++++++++++-
>>  2 files changed, 65 insertions(+), 1 deletion(-)
>>
>> diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
>> index be88870799..dc4624794f 100644
>> --- a/default-configs/arm-softmmu.mak
>> +++ b/default-configs/arm-softmmu.mak
>> @@ -160,3 +160,5 @@ CONFIG_PCI_DESIGNWARE=y
>>  CONFIG_STRONGARM=y
>>  CONFIG_HIGHBANK=y
>>  CONFIG_MUSICPAL=y
>> +CONFIG_MEM_DEVICE=y
>> +CONFIG_DIMM=y
>> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
>> index f01886da22..783468ba77 100644
>> --- a/hw/arm/virt.c
>> +++ b/hw/arm/virt.c
>> @@ -59,6 +59,8 @@
>>  #include "qapi/visitor.h"
>>  #include "standard-headers/linux/input.h"
>>  #include "hw/arm/smmuv3.h"
>> +#include "hw/mem/pc-dimm.h"
>> +#include "hw/mem/nvdimm.h"
>>  
>>  #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
>>      static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
>> @@ -1763,6 +1765,49 @@ static const CPUArchIdList *virt_possible_cpu_arch_ids(MachineState *ms)
>>      return ms->possible_cpus;
>>  }
>>  
>> +static void virt_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
>> +                                 Error **errp)
>> +{
>> +    const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
>> +
>> +    if (dev->hotplugged) {
>> +        error_setg(errp, "memory hotplug is not supported");
>> +    }
>> +
>> +    if (is_nvdimm) {
>> +        error_setg(errp, "nvdimm is not yet supported");
>> +        return;
>> +    }
>> +
>> +    pc_dimm_pre_plug(PC_DIMM(dev), MACHINE(hotplug_dev), NULL, errp);
>> +}
>> +
>> +static void virt_memory_plug(HotplugHandler *hotplug_dev,
>> +                             DeviceState *dev, Error **errp)
>> +{
>> +    VirtMachineState *vms = VIRT_MACHINE(hotplug_dev);
>> +    Error *local_err = NULL;
>> +
>> +    pc_dimm_plug(PC_DIMM(dev), MACHINE(vms), &local_err);
>> +
>> +    error_propagate(errp, local_err);
>> +}
>> +
>> +static void virt_memory_unplug(HotplugHandler *hotplug_dev,
>> +                               DeviceState *dev, Error **errp)
>> +{
>> +    pc_dimm_unplug(PC_DIMM(dev), MACHINE(hotplug_dev));
>> +    object_unparent(OBJECT(dev));
> 
> Please note that this will soon change with
> 
> [PATCH RFCv2 0/9] qdev: Hotplug handler chaining + virtio-pmem
> 
> What you'll have to do then is to replace the object_unparent by a
> 
> object_property_set_bool(OBJECT(dev), false, "realized", NULL);
Noted.

Thanks for the heads up!

Eric
> 
>

Patch
diff mbox series

diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index be88870799..dc4624794f 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -160,3 +160,5 @@  CONFIG_PCI_DESIGNWARE=y
 CONFIG_STRONGARM=y
 CONFIG_HIGHBANK=y
 CONFIG_MUSICPAL=y
+CONFIG_MEM_DEVICE=y
+CONFIG_DIMM=y
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index f01886da22..783468ba77 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -59,6 +59,8 @@ 
 #include "qapi/visitor.h"
 #include "standard-headers/linux/input.h"
 #include "hw/arm/smmuv3.h"
+#include "hw/mem/pc-dimm.h"
+#include "hw/mem/nvdimm.h"
 
 #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
     static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
@@ -1763,6 +1765,49 @@  static const CPUArchIdList *virt_possible_cpu_arch_ids(MachineState *ms)
     return ms->possible_cpus;
 }
 
+static void virt_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
+                                 Error **errp)
+{
+    const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
+
+    if (dev->hotplugged) {
+        error_setg(errp, "memory hotplug is not supported");
+    }
+
+    if (is_nvdimm) {
+        error_setg(errp, "nvdimm is not yet supported");
+        return;
+    }
+
+    pc_dimm_pre_plug(PC_DIMM(dev), MACHINE(hotplug_dev), NULL, errp);
+}
+
+static void virt_memory_plug(HotplugHandler *hotplug_dev,
+                             DeviceState *dev, Error **errp)
+{
+    VirtMachineState *vms = VIRT_MACHINE(hotplug_dev);
+    Error *local_err = NULL;
+
+    pc_dimm_plug(PC_DIMM(dev), MACHINE(vms), &local_err);
+
+    error_propagate(errp, local_err);
+}
+
+static void virt_memory_unplug(HotplugHandler *hotplug_dev,
+                               DeviceState *dev, Error **errp)
+{
+    pc_dimm_unplug(PC_DIMM(dev), MACHINE(hotplug_dev));
+    object_unparent(OBJECT(dev));
+}
+
+static void virt_machine_device_pre_plug_cb(HotplugHandler *hotplug_dev,
+                                            DeviceState *dev, Error **errp)
+{
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+        virt_memory_pre_plug(hotplug_dev, dev, errp);
+    }
+}
+
 static void virt_machine_device_plug_cb(HotplugHandler *hotplug_dev,
                                         DeviceState *dev, Error **errp)
 {
@@ -1774,12 +1819,27 @@  static void virt_machine_device_plug_cb(HotplugHandler *hotplug_dev,
                                      SYS_BUS_DEVICE(dev));
         }
     }
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+            virt_memory_plug(hotplug_dev, dev, errp);
+    }
+}
+
+static void virt_machine_device_unplug_cb(HotplugHandler *hotplug_dev,
+                                          DeviceState *dev, Error **errp)
+{
+    if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
+        virt_memory_unplug(hotplug_dev, dev, errp);
+    } else {
+        error_setg(errp, "device unplug request for unsupported device"
+                   " type: %s", object_get_typename(OBJECT(dev)));
+    }
 }
 
 static HotplugHandler *virt_machine_get_hotplug_handler(MachineState *machine,
                                                         DeviceState *dev)
 {
-    if (object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE)) {
+    if (object_dynamic_cast(OBJECT(dev), TYPE_SYS_BUS_DEVICE) ||
+       (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM))) {
         return HOTPLUG_HANDLER(machine);
     }
 
@@ -1843,7 +1903,9 @@  static void virt_machine_class_init(ObjectClass *oc, void *data)
     mc->kvm_type = virt_kvm_type;
     assert(!mc->get_hotplug_handler);
     mc->get_hotplug_handler = virt_machine_get_hotplug_handler;
+    hc->pre_plug = virt_machine_device_pre_plug_cb;
     hc->plug = virt_machine_device_plug_cb;
+    hc->unplug = virt_machine_device_unplug_cb;
 }
 
 static void virt_instance_init(Object *obj)