[Qemu-devel] how to modify or add machines type ?

[Qemu-devel] how to modify or add machines type ?

[Paul Schlacter]

I made the default config build the qemu-kvm , But I used virsh xml
corresponding machine-type inconsistent, resulting in an error.

error:
2017-09-06T12:16:36.036200Z qemu-kvm: -machine
pc-i440fx-rhel7.0.0,accel=kvm,usb=off: unsupported machine type
Use -machine help to list supported machines


Is there any way to modify the machines in qemu-kvm?


[root@nova02 qemu-2.6.0]# /usr/libexec/qemu-kvm -M ?
Supported machines are:
pc                   Standard PC (i440FX + PIIX, 1996) (alias of
pc-i440fx-2.6)
pc-i440fx-2.6        Standard PC (i440FX + PIIX, 1996) (default)
pc-i440fx-2.5        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.4        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.3        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.2        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.1        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-2.0        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.7        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.6        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.5        Standard PC (i440FX + PIIX, 1996)
pc-i440fx-1.4        Standard PC (i440FX + PIIX, 1996)
pc-1.3               Standard PC (i440FX + PIIX, 1996)
pc-1.2               Standard PC (i440FX + PIIX, 1996)
pc-1.1               Standard PC (i440FX + PIIX, 1996)
pc-1.0               Standard PC (i440FX + PIIX, 1996)
pc-0.15              Standard PC (i440FX + PIIX, 1996)
pc-0.14              Standard PC (i440FX + PIIX, 1996)
pc-0.13              Standard PC (i440FX + PIIX, 1996)
pc-0.12              Standard PC (i440FX + PIIX, 1996)
pc-0.11              Standard PC (i440FX + PIIX, 1996)
pc-0.10              Standard PC (i440FX + PIIX, 1996)
q35                  Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-2.6)
pc-q35-2.6           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.5           Standard PC (Q35 + ICH9, 2009)
pc-q35-2.4           Standard PC (Q35 + ICH9, 2009)
isapc                ISA-only PC
none                 empty machine

Re: [Qemu-devel] how to modify or add machines type ?

[Daniel P. Berrange]

On Wed, Sep 06, 2017 at 08:13:38PM +0800, Paul Schlacter wrote:
> I made the default config build the qemu-kvm , But I used virsh xml
> corresponding machine-type inconsistent, resulting in an error.
> 
> error:
> 2017-09-06T12:16:36.036200Z qemu-kvm: -machine
> pc-i440fx-rhel7.0.0,accel=kvm,usb=off: unsupported machine type
> Use -machine help to list supported machines
> 
> 
> Is there any way to modify the machines in qemu-kvm?

Why do you want to change the QEMU machines, instead of just editting
your libvirt guest XML to use one of the machine types that QEMU
already supports ?  (virsh edit $GUESTNAME and then find the machine
type name & change it)


Regards,
Daniel
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