From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56886) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1faR4T-0000rp-8A for qemu-devel@nongnu.org; Tue, 03 Jul 2018 15:34:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1faR4S-0003yf-D7 for qemu-devel@nongnu.org; Tue, 03 Jul 2018 15:34:41 -0400 References: <1530602398-16127-1-git-send-email-eric.auger@redhat.com> <1530602398-16127-8-git-send-email-eric.auger@redhat.com> From: Auger Eric Message-ID: <4dfad441-b94f-916f-025e-fc69b6375465@redhat.com> Date: Tue, 3 Jul 2018 21:34:29 +0200 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [RFC v3 07/15] hw/arm/virt: Add memory hotplug framework List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: David Hildenbrand , eric.auger.pro@gmail.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, shameerali.kolothum.thodi@huawei.com, imammedo@redhat.com Cc: dgilbert@redhat.com, agraf@suse.de, david@gibson.dropbear.id.au, drjones@redhat.com, wei@redhat.com Hi David, On 07/03/2018 08:44 PM, David Hildenbrand wrote: > On 03.07.2018 09:19, Eric Auger wrote: >> From: Shameer Kolothum >> >> This patch adds the the memory hot-plug/hot-unplug infrastructure >> in machvirt. >> >> Signed-off-by: Eric Auger >> Signed-off-by: Shameer Kolothum >> Signed-off-by: Kwangwoo Lee >> >> --- >> >> 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 > >