Re: [Qemu-devel] Running KVM guest on X86

[Stuart Yoder]

On Tue, Aug 7, 2012 at 1:30 AM, Bhushan Bharat-R65777
<address@hidden> wrote:
>
>
>> -----Original Message-----
>> From: Alex Williamson [mailto:address@hidden
>> Sent: Monday, August 06, 2012 9:27 PM
>> To: Bhushan Bharat-R65777
>> Cc: address@hidden; Avi Kivity
>> Subject: Re: Running KVM guest on X86
>>
>> On Mon, 2012-08-06 at 15:40 +0000, Bhushan Bharat-R65777 wrote:
>> > Hi Avi/All,
>> >
>> > I am facing issue to boot KVM guest on x86 (I used to work on PowerPC 
>> > platform
>> and do not have enough knowledge of x86). I am working on making VFIO 
>> working on
>> PowerPC Booke, So I have cloned Alex Williamsons git repository, compiled 
>> kernel
>> for x86 on fedora with virtualization configuration (selected all kernel 
>> config
>> options for same). Run below command to boot Guest (I have not provided vfio
>> device yet):
>> >
>> > "qemu-system-x86_64 -enable-kvm -m 1024 -nographic -kernel
>> arch/x86_64/boot/bzImage -initrd /boot/initramfs-3.5.0-rc4+.img -serial
>> tcp::4444,server,telnet"
>> >
>> > After the I can see qemu command line (able to run various commands like 
>> > "info
>> registers" etc), while guest does not boot (not even the first print comes).
>> >
>> > Can anyone help in what I am missing or doing wrong?
>>
>> x86 doesn't use the serial port for console by default, so you're making 
>> things
>> quite a bit more difficult that way.  Typically you'll want to provide a disk
>> image (the -hda option is the easiest way to do this), a display (-vga std 
>> -vnc
>> :0 is again easiest), and probably something to install from (-cdrom
>> <image.iso>).  You can also add a -boot d to get it to choose the cdrom the
>> first time for install.  Thanks,
>
> Thanks Avi and Alex, I can see the KVM guest boot prints by adding -append 
> "console=ttyS0"

Note, once you get to user space you will need a getty specified in
inittab in order to get a login on your serial port.   Something like:

   T0:23:respawn:/sbin/getty -L ttyS0

Stuart