Re: [PATCH qemu-server/docs/manager 0/3] add pvpanic device support

[Kaiyang Wu <wukaiyang2003@gmail.com>]

Hi Dominik,

This series of patches currently allow to display a yellow exclamation 
triangle on the web UI when a VM panics. I found the pve-manager CSS has 
already reserved the icon for the guest-panicked status.

I think the idea of making it work with the HA stack is interesting. I 
will try to work on that, thanks for the suggestion!

Best,
Kaiyang

On 2026-09-04 16:30, Dominik Csapak wrote:
> Hi,
> 
> high level question:
> 
> with this series, the pvpanic device is added, but nothing on the other
> side queries it? So what's the use case here?
> 
> I think it could come in handy, but we should actually do something with 
> it ;)
> 
> E.g. at least we could also set the panic handler in tandem:
> 
> --action panic=none|shutdown|...
> 
> e.g. a shutdown action on panic paired with our HA stack could
> reboot the vm (didn't test though)
> 
> On 8/27/26 12:35 PM, Kaiyang Wu wrote:
>> This patchset adds pvpanic device support to QEMU virtual machines to
>> provide extra virtual machine status (guest-panicked) when virtual
>> machines panic.
>>
>> The pvpanic device can be implemented as an ISA device ('-device
>> pvpanic') or as a PCI device ('-device pvpanic-pci') [0]. The ISA
>> pvpanic device is only available on x86_64, and Linux VMs with kernel
>>> =3.1 and <5.2 only support the ISA pvpanic device [1] [2]. Therefore,
>> the patchset allows to choose between the two variants to fit different
>> needs, and adds a documentation section to help picking the variant.
>>
>> [0]: https://www.qemu.org/docs/master/specs/pvpanic.html
>> [1]: https://www.kernelconfig.io/CONFIG_PVPANIC
>> [2]: https://www.kernelconfig.io/CONFIG_PVPANIC_PCI
>>
>>
>> qemu-server:
>>
>> Kaiyang Wu (1):
>>    qemuserver: add pvpanic device
>>
>>   src/PVE/API2/Qemu.pm      |  1 +
>>   src/PVE/QemuServer.pm     | 19 +++++++++++++++++++
>>   src/PVE/QemuServer/PCI.pm |  1 +
>>   3 files changed, 21 insertions(+)
>>
>>
>> docs:
>>
>> Kaiyang Wu (1):
>>    qm: add document section for the pvpanic device
>>
>>   qm.adoc | 29 +++++++++++++++++++++++++++++
>>   1 file changed, 29 insertions(+)
>>
>>
>> manager:
>>
>> Kaiyang Wu (1):
>>    ui: qemu: add pvpanic device support
>>
>>   www/manager6/Makefile                |  2 ++
>>   www/manager6/Utils.js                |  1 +
>>   www/manager6/form/PvpanicSelector.js | 12 +++++++++
>>   www/manager6/qemu/Architecture.js    |  5 ++++
>>   www/manager6/qemu/HardwareView.js    | 15 +++++++++++
>>   www/manager6/qemu/PvpanicEdit.js     | 39 ++++++++++++++++++++++++++++
>>   6 files changed, 74 insertions(+)
>>   create mode 100644 www/manager6/form/PvpanicSelector.js
>>   create mode 100644 www/manager6/qemu/PvpanicEdit.js
>>
>