Re: [GIT PULL] Linux KVM tool for v3.7-rc0

From: Markus Trippelsdorf
Date: Sun Oct 21 2012 - 13:42:30 EST

On 2012.10.21 at 19:15 +0200, Borislav Petkov wrote:
> On Sun, Oct 21, 2012 at 05:03:05PM +0200, Ingo Molnar wrote:
> > The best way to compare them would be a script that gives exactly the
> > same test environment that 'vm run' / 'vm sandbox' does out of box,
> > but using qemu.
> >
> > If such a script is available then that would certainly be a useful
> > testing option to kernel developers.
> Right,
> I gotta say, I've mucked around with qemu/kvm net options as a novice
> user and haven't always been successfu. If you get host networking
> straight away in lkvm then that's another clear point for tools/kvm.
> Same holds true for copying data back and forth between host and guest.

I'm agnostic about lkvm, but the following command does all the above:

qemu-system-x86_64 -enable-kvm -net nic,vlan=0,model=virtio -net user -fsdev local,security_model=passthrough,id=root,path=/ -device virtio-9p-pci,id=root,fsdev=root,mount_tag=/dev/root -m 512 -smp 2 -kernel /usr/src/linux/arch/x86/boot/bzImage -nographic -append "init=/bin/zsh root=/dev/root console=ttyS0 kgdboc=ttyS0 rootflags=rw,trans=virtio rootfstype=9p ip=dhcp"

If you want your host root-fs to be mounted rw (to copy data back and forth)
you need to run to above as root and add "rw" to the kernel options.

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