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Re: [Qemu-devel] [PATCH v2 5/8] pc-dimm: introduce prepare_unplug() call

From: Xiao Guangrong
Subject: Re: [Qemu-devel] [PATCH v2 5/8] pc-dimm: introduce prepare_unplug() callback
Date: Sat, 8 Oct 2016 15:20:30 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 


On 10/03/2016 05:45 PM, Igor Mammedov wrote:

On Fri, 12 Aug 2016 14:54:07 +0800
Xiao Guangrong <address@hidden> wrote:


We should let nvdimm acpi know which nvdimm device is being unplugged
before QEMU interrupts the guest so that nvdimm acpi can update its
FIT properly

prepare_unplug() callback is introduced exactly for this purpose then
the being removed device is skipped when guest reads FIT

Hot-unplug for NVDIMMs isn't mentinoned in spec so I'd would drop it for now.


Okay. Then i will stop hot-unplug and generate a error message if nvdimm device
is being un-plugged:
  "NVDIMM hot-unplug has not been supported yet."
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