RE: [Xen-devel] dom0 kernel crashes with kernel panic during boot

["Ian Pratt" <Ian.Pratt@xxxxxxxxxxxx>]

> have other problem - is it possible to share one serial port 
> between grub, xen itself and dom0?

The easiest way to do this is to simply not build a hardware serial
driver into dom0, but use the ttyS0 driver provided by the xen console
driver.

Just add "com1=115200,8n1" to your Xen command line, then your grub and
dom0 setups should work fine.

Alternatively, you could have dom0 drive the serial line directly, but
you'll have to tell the xencons driver in dom0 not to grab the ttyS
name, using "xencons=off".

One for the FAQ...

Ian
 
> It panics also if I use
> 
> kernel (hd0,0)/xen.gz dom0_mem=32768
> module (hd0,0)/vmlinuz-2.6.9-xen0 root=/dev/hda3 ro 
> console=ttyS0,115200
> 
> my grub.conf contains
> 
> serial --unit=0 --speed=115200
> terminal serial console
> 
> the (stripped) message is:
> 
> devfs: 2004-01-31 Richard Gooch (rgooch@xxxxxxxxxxxxx)
> devfs: boot_options: 0x1
> Limiting direct PCI/PCI transfers.
> serio: i8042 AUX port at 0x60,0x64 irq 12
> serio: i8042 KBD port at 0x60,0x64 irq 1
> Serial: 8250/16550 driver $Revision: 1.90 $ 6 ports, IRQ 
> sharing disabled ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A HP 
> CISS Driver (v 2.6.2) pcnet32.c:v1.30i 06.28.2004 
> tsbogend@xxxxxxxxxxxxxxxx Kernel panic - not syncing: 
> Couldn't register Xen virtual console driver as ttyS
> 
> 
> -- 
> Jan Kundrat
> jan.kundrat@xxxxxx
> 
> 
> 
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