From 1f283ae1245ec79b84c161f8cf17c0518421e2ad Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Wed, 18 Sep 2019 14:06:26 +0100 Subject: [PATCH] hw/arm/virt: Add memory hotplug framework This patch adds the memory hot-plug/hot-unplug infrastructure in machvirt. The device memory is not yet exposed to the Guest either through DT or ACPI and hence both cold/hot plug of memory is explicitly disabled for now. Signed-off-by: Eric Auger Signed-off-by: Kwangwoo Lee Signed-off-by: Shameer Kolothum Reviewed-by: Peter Maydell Reviewed-by: Igor Mammedov Message-Id: <20190918130633.4872-5-shameerali.kolothum.thodi@huawei.com> Acked-by: Peter Maydell Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/arm/Kconfig | 2 ++ hw/arm/virt.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 54 insertions(+), 1 deletion(-) diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig index 76a2a6bcbf..39d285ad3d 100644 --- a/hw/arm/Kconfig +++ b/hw/arm/Kconfig @@ -20,6 +20,8 @@ config ARM_VIRT select SMBIOS select VIRTIO_MMIO select ACPI_PCI + select MEM_DEVICE + select DIMM config CHEETAH bool diff --git a/hw/arm/virt.c b/hw/arm/virt.c index d74538b021..1c967e3fee 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -68,6 +68,8 @@ #include "hw/arm/smmuv3.h" #include "hw/acpi/acpi.h" #include "target/arm/internals.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, \ @@ -1876,6 +1878,42 @@ 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) +{ + + /* + * The device memory is not yet exposed to the Guest either through + * DT or ACPI and hence both cold/hot plug of memory is explicitly + * disabled for now. + */ + if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { + error_setg(errp, "memory cold/hot plug 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_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) { @@ -1887,12 +1925,23 @@ 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_request_cb(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + 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); } @@ -1956,7 +2005,9 @@ 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_request = virt_machine_device_unplug_request_cb; mc->numa_mem_supported = true; }