Deprecated machine type

[thock]

I am atttempting to run a Linux VM in IOx on a C8200 platform.  The container log shows that it is starting with option:

-machine pc-0.13,accel=kvm,usb=off,dump-guest-core=off

and complains:

2025-10-21T17:11:14.773544Z qemu-kvm: Machine type 'pc-0.13' is deprecated: use a newer machine type instead

I really need the machine type to be pc-q35 to support my version of Linux.  Is there a way to specify the correct machine type?

IOx version is 1.20.0.3

[Torbjørn]

Can you share some details about your VM, package.yaml and deployment specifics/method? 

[bigevilbeard]

You might be able to do this in the package.yaml file https://developer.cisco.com/docs/iox/package-format/#iox-application-package this might be done in platform or qemu-args? 

[thock]

The VM runs in KVM on my Ubuntu server when it is configured with pc-q35 machine type.  The app setion of my yaml file is:

app:

  cpuarch: x86_64

  type: vm

  resources:

   profile: custom

   cpu: 7406

   memory: 6144

   vcpu: 2

   network:

    - interface-name: eth0

  startup:

   ostype: Linux

   disks:

    - target-dev: hda

      file: "ESIP-UTA-10.3_Build54-KVM.qcow2"

   qemu-guest-agent: True

I looked through the Package Descriptor document and found app->startup->args but that seems to be specific to Docker startup.  I did not see anything about qemu-args.  Do you have an example of how to configure this in the yaml file? Thanks!

[bigevilbeard]

I dont know this be 100% correct, i found this on GH

qemu-guest-agent: True
    qemu-args:
      - "-machine"
      - "pc-q35"
      - "-usb" # Example of another optional argument
      - "-device"
      - "usb-tablet"

[thock]

This looks like what I would want to use.  Unfortunately, the schema that Cisco uses to parse the yaml file doesn't support qemu-args.

[bigevilbeard]

@thock ... gah..... ok i am fresh out of ideas then, i dont even know if you could get the level of access to update the libvirt XML file.