Default Xen PVM console?

Scott Long scottl at
Sun May 24 11:31:56 UTC 2009

Robert Watson wrote:
> On Sun, 24 May 2009, Ed Schouten wrote:
>> * Adrian Chadd <adrian at> wrote:
>>> * Modify the xenconsole driver to attach to ttyv0 (via a kernel 
>>> environment variable) so /etc/ttys doesn't need modifying (but this 
>>> may confuse tools that assumes /dev/ttyvX == syscons.)
>> Please don't. Someone on IRC told me Xen also has some framebuffer 
>> feature. Say, someone would port syscons to Xen, the naming would 
>> conflict with the console device node. /dev/xc0 is good enough. I even 
>> think it should have been called ttyx0, not xc0.
> Given that there will be increasing levels of support for "pass-through" 
> hardware access in virtual machine environments and a trend in the 
> direction of virtualization-friendly hardware, we shouldn't preclude the 
> possibility of something a lot closer to syscons working inside of Xen 
> in the future.  This means we should leave the syscons device names open 
> so that syscons can claim them if desired.

HVM mode already supports "pass-through" with syscons working in it.
That is orthogonal to the discussion of supporting the native
virtualization features of Xen.


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