Re: [Xen-users] Connecting Dom0 to the Host's Serial Port?

[Sarah Newman <srn@xxxxxxxxx>]

On 07/03/2015 03:43 PM, Eric wrote:
> Hello, All:
> 
> I have a fairly simple question. Before I installed Xen on my CentOS 6.6 
> host, I'd added some configuration to the Grub configuration file
> (/boot/grub/menu.lst) to allow access via the serial-console server:
> 
>> default=0
>> timeout=5
>> splashimage=(hd0,0)/grub/splash.xpm.gz
>> serial --unit=1 --speed=115200 --word=8 --parity=no --stop=1
>> terminal --timeout=5 serial console
>> ...
>> kernel /vmlinuz-2.6.32-504.1.3.el6.x86_64 ro ... quiet console=tty0 
>> console=ttyS0,115200n8
> 
> This seemed to work well until I added the stanzas to load Xen:
> 
>> title CentOS (3.10.68-11.el6.centos.alt.x86_64)
>>    root (hd0,0)
>>    kernel /xen.gz dom0_mem=1024M,max:1024M loglvl=all guest_loglvl=all
>>    module /vmlinuz-3.10.68-11.el6.centos.alt.x86_64 ro ... quiet 
>> console=tty0 console=ttyS0,115200n8
>>    module /initramfs-3.10.68-11.el6.centos.alt.x86_64.img
> 
> Now I'm able to view/interact with the host's BIOS; the Grub boot menu, and; 
> I'm able to watch the initial portion of the boot process. However, after
> the xend starts I'm no longer able to view or to interact with Dom0.
> 
> How can I grant Dom0 permanent access to the serial-console port of the host 
> [hardware]?

you probably want
        kernel /boot/xen.gz com1=115200,8n1 console=com1
        module /boot/vmlinuz-3.10.68-11.el6.centos.alt.x86_64 console=hvc0



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