On Sun, Aug 3, 2025 at 6:16 AM Yunpeng Yang <yunpeng.y...@nutanix.com> wrote:
> Hello Corey Minyard, > > I hope you are all well. > > Could I ask for your opinion on whether it is worthing implementing a fake > LAN config for device ipmi-bmc-sim ? (Details are in my last email, which > is also included below). > > During my work over last month, I found that QEMU already has > ipmi-bmc-extern which supports comprehensive BMC simulation, including > LAN config faking. But ipmi-bmc-sim is more light-weight and easier to > set up. So I think it still has some value in implementing LAN config for > ipmi-bmc-sim . Could you please share your views? > > Well, there is no LAN interface, so I didn't see any need to add that. The values would not be permanent. But it would be harmless to add, so I'd be ok with a patch to do this. The external interface with ipmisim from the OpenIPMI library provides a pretty comprehensive solution. -corey > Best regards, > Yunpeng Yang > > > ------------------------------ > *From:* Yunpeng Yang <yunpeng.y...@nutanix.com> > *Sent:* Friday, June 27, 2025 18:13 > *To:* miny...@acm.org <miny...@acm.org> > *Cc:* qemu-devel@nongnu.org <qemu-devel@nongnu.org>; Mark Cave-Ayland < > mark.caveayl...@nutanix.com>; Jonathan Davies <j...@nutanix.com> > *Subject:* Add support for retrieving fake LAN config from `ipmi-bmc-sim` > device > > Hello Corey Minyard, > > I hope this email finds you well. > > I'm currently adding LAN-configs-retrieval support to the QEMU > ipmi-bmc-sim device. And I hope to merge the modifications upstream after > it's finished. Could you please check the attached patch file of the draft > code and share your opinions and advice? > > In my work, we need to run tools like "ipmitool lan print" on a VM for > testing purposes. However, QEMU internal BMC simulator device > (`ipmi-bmc-sim`) does not support retrieving LAN configs from it. I have to > implement two IPMI commands so that the device can now work with ipmitool. > The LAN config values are faked, but for testing purposes this is not a > problem. I believe other people may also have the same need, so it's worth > getting merged upstream. > > The fake BMC LAN config values are currently hard coded into the code. My > plan is to add a parameter to the device, which is a file containing user > designated values. The device then reads the file and returns those values > as LAN configs. This is similar to sdrfile for sensor data and frudatafile for > FRU data. > > Looking forward to hearing your thoughts. > Have a nice weekend. > > Kind regards, > Yunpeng Yang >
