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




From:"Sarah Newman" <srn@xxxxxxxxx>
Date:Fri, Jul 3, 2015 at 4:08 PM
Subject:Re: [Xen-users] Connecting Dom0 to the Host's Serial Port?

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

Thank you, Sarah!

Eric Pretorious
Portland, OR

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