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Re: [Qemu-arm] [RFC v3 07/15] hw/arm/virt: Add memory hotplug framework
From: |
Auger Eric |
Subject: |
Re: [Qemu-arm] [RFC v3 07/15] hw/arm/virt: Add memory hotplug framework |
Date: |
Tue, 3 Jul 2018 21:34:29 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
Hi David,
On 07/03/2018 08:44 PM, David Hildenbrand wrote:
> On 03.07.2018 09:19, Eric Auger wrote:
>> From: Shameer Kolothum <address@hidden>
>>
>> This patch adds the the memory hot-plug/hot-unplug infrastructure
>> in machvirt.
>>
>> Signed-off-by: Eric Auger <address@hidden>
>> Signed-off-by: Shameer Kolothum <address@hidden>
>> Signed-off-by: Kwangwoo Lee <address@hidden>
>>
>> ---
>>
>> 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 | 68
>> ++++++++++++++++++++++++++++++++++++++++-
>> 2 files changed, 69 insertions(+), 1 deletion(-)
>>
>> diff --git a/default-configs/arm-softmmu.mak
>> b/default-configs/arm-softmmu.mak
>> index 834d45c..28fe8f3 100644
>> --- a/default-configs/arm-softmmu.mak
>> +++ b/default-configs/arm-softmmu.mak
>> @@ -152,3 +152,5 @@ CONFIG_PCI_DESIGNWARE=y
>> CONFIG_STRONGARM=y
>> CONFIG_HIGHBANK=y
>> CONFIG_MUSICPAL=y
>> +CONFIG_MEM_HOTPLUG=y
>> +
>> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
>> index 6fefb78..7190962 100644
>> --- a/hw/arm/virt.c
>> +++ b/hw/arm/virt.c
>> @@ -60,6 +60,8 @@
>> #include "standard-headers/linux/input.h"
>> #include "hw/arm/smmuv3.h"
>> #include "hw/acpi/acpi.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, \
>> @@ -1785,6 +1787,53 @@ 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 (is_nvdimm) {
>> + error_setg(errp, "nvdimm is not yet supported");
>> + return;
>> + }
>
> You mention that actual hotplug is not supported, only coldplug.
> Wouldn't this be the right place to check for that? (only skimmed over
> your patches, how do you handle that?)
At the moment I don't check it. I did not look yet at ways to
discriminate both cases.
Thanks
Eric
>
>
- Re: [Qemu-arm] [Qemu-devel] [RFC v3 06/15] hw/arm/virt: Allocate device_memory, (continued)
- [Qemu-arm] [RFC v3 11/15] hw/arm/virt-acpi-build: Add PC-DIMM in SRAT, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 02/15] hw/boards: Add a MachineState parameter to kvm_type callback, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 03/15] kvm: add kvm_arm_get_max_vm_phys_shift, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 04/15] hw/arm/virt: support kvm_type property, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 09/15] hw/arm/boot: Expose the PC-DIMM nodes in the DT, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 15/15] hw/arm/virt: Add nvdimm and nvdimm-persistence options, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 01/15] linux-headers: header update for KVM/ARM KVM_ARM_GET_MAX_VM_PHYS_SHIFT, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 10/15] acpi: move build_srat_hotpluggable_memory to generic ACPI source, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 12/15] nvdimm: use configurable ACPI IO base and size, Eric Auger, 2018/07/03