Re: [gentoo-user] Re: qemu-kvm replacement

[Mike Gilbert <floppym@gentoo.org>]

On Tue, Jun 10, 2014 at 7:45 PM, walt <w41ter@gmail.com> wrote:
> On 06/10/2014 02:31 PM, Heiko Zinke wrote:
>> Hi,
>>
>> with my recent qemu update from 1.6 to 2.0 I got the following error:
>>
>> * The kvm/qemu-kvm wrappers no longer exist, but your libvirt
>>  * instances are still pointing to it.  Please update your
>>  * configs in /etc/libvirt/qemu/ to use the -enable-kvm flag
>>  * and the right system binary (e.g. qemu-system-x86_64).
>>  * ERROR: app-emulation/qemu-2.0.0::gentoo failed (pretend phase):
>>  *   update your virt configs to not use qemu-kvm
>>  *
>>  * Call stack:
>>  *           ebuild.sh, line  93:  Called pkg_pretend
>>  *   qemu-2.0.0.ebuild, line 225:  Called die
>>  * The specific snippet of code:
>>  *              die "update your virt configs to not use qemu-kvm"
>>
>> I found this bug which explains the why but sadly not the how.
>> https://bugs.gentoo.org/show_bug.cgi?id=506566
>>
>> I need to get rid of the reference to the /usr/bin/qemu-kvm shell script which
>> is basically only a wrapper for "exec /usr/bin/qemu-system-x86_64 -machine
>> accel=kvm "$@""
>>
>> So if I "sudo virsh edit vmname" and substitute "/usr/bin/qemu-kvm" by
>> "/usr/bin/qemu-system-x86_64 -machine accel=kvm -enable-kvm" I only get this
>> error :(
>> "error: Cannot check QEMU binary /usr/bin/qemu-system-x86_64 -machine
>> accel=kvm -enable-kvm: No such file or directory"
>>
>> How is this supposed to work? Do I need to create a custom shell skript or
>
>> just use /usr/bin/qemu-system-x86_64 w/o the args an hope it  magically uses
>> kvm acceleration?
>
> I believe "accel=kvm" is obsolete now.  "-enable-kvm" is the magic word
> lately.  Try "qemu-system-x86_64 -help" for more info than you want :)
>

Reading through the source code, -enable-kvm seems to be equivalent to
-machine accel=kvm.