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Re: [Xen-devel] Can anyone successfully use serial console to debug XEN-

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Can anyone successfully use serial console to debug XEN-4.0.1-rc6?
From: Yuehai Xu <yuehaixu@xxxxxxxxx>
Date: Tue, 21 Sep 2010 11:57:17 -0400
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On Tue, Sep 21, 2010 at 11:37 AM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
> On Tue, Sep 21, 2010 at 11:23:01AM -0400, Yuehai Xu wrote:
>> Hi,
>> I set my grub to use serial console:
>> ...
>> kernel /boot/xen.gz dom0_mem=1024m console=com1 com1=115200,8n1
> That should work. It works for me.
>> ...
>> But I failed to get anything output from XEN. On the other hand, I can
> What is your serial device? Is it a PCI card or is it built in?

It is a PCI card, as you said, after adding corresponding IRQ and
IOPORT, it works.

>> get the output from kernel of Dom0 by this way:
>> ...
>> module /boot/vmlinuz- ro root=LABEL=/1 maxcpus=1 
>> console=ttyS0,115200n8
>> ...
>> So, should anything special parameters be configured in order to get
>> the output of XEN?
> Not if it is a normal built-in serial device. If it is a PCI(or PCI-e or Mini 
> PCI-e)
> then you have to fiddle a bit to find its ioport. It is discussed in detail 
> on the Wiki -
> search PVOPS Wiki and then for the Serial Xen troubleshooting one - Mr. Pasi 
> made sure
> to include a wealth of details on how to work this out.

Yeah, I'm afraid I don't read carefully about this wiki, ignoring the
hints about IRQ and IOPORT, sorry for making noise.

Thanks very much,

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