On 05/26/2011 07:36 AM, Sasha Levin wrote:
On Thu, 2011-05-26 at 07:28 -0700, Venkateswararao Jujjuri wrote:
Any progress on this? May I get more detailed instructions on how
you did this trick? Basically booting on 9P/VirtIO.
Thanks,
JV
Ofcourse. This change didn't go into tools/kvm/ since we only support
the legacy 9p2000 protocol at the moment, which means that even though
we can boot - it's quite unusable to work with.
The trick is pretty simple: You need to name your virtio transport
"/dev/root" (I think it's currently named "local" in qemu). Once it's
named this way, boot with the following kernel cmdline added:
"root=/dev/root rootflags=rw,trans=virtio,version=9p2000 rootfstype=9p
rw" (You should be able to change version to one of the 9p2000
extensions).
Ah I guess you are making use of rootfstype.
So in this setup basically the virtio transport you create
is /dev/root instead of "kvm_9p" correct?
Also your dir will be / ?
i.e Start KVM with '--virtio-9p /'. ?
I've noticed that the transport *has* to be named "/dev/root", naming it
something else (and adjusting the "root=" parameter) doesn't seem to
work.
Also, if it's named "/dev/root" I couldn't mount it as a simple
filesystem from within a guest - not as root.
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