101 messages in com.xensource.lists.xen-devel[Xen-devel] Re: [RFC PATCH 27/33] Add...
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Hollis Blanchard27 Jul 2006 08:04 
Subject:[Xen-devel] Re: [RFC PATCH 27/33] Add the Xen virtual console driver.
From:Hollis Blanchard (holl@us.ibm.com)
Date:07/27/2006 08:04:42 AM
List:com.xensource.lists.xen-devel

On Tue, 2006-07-18 at 00:00 -0700, Chris Wright wrote:

plain text document attachment (xen-console) This provides a bootstrap and ongoing emergency console which is intended to be available from very early during boot and at all times thereafter, in contrast with alternatives such as UDP-based syslogd, or logging in via ssh. The protocol is based on a simple shared-memory ring buffer.

+/* + * Modes: + * 'xencons=off' [XC_OFF]: Console is disabled. + * 'xencons=tty' [XC_TTY]: Console attached to '/dev/tty[0-9]+'. + * 'xencons=ttyS' [XC_SERIAL]: Console attached to '/dev/ttyS[0-9]+'. + * [XC_DEFAULT]: DOM0 -> XC_SERIAL ; all others -> XC_TTY. + * + * NB. In mode XC_TTY, we create dummy consoles for tty2-63. This suppresses + * warnings from standard distro startup scripts. + */

The console driver should not be hijacking /dev/tty or /dev/ttyS devices. Instead, it should use its own char device, like the pSeries hypervisor console does (/dev/hvc).

Yes, I understand that installers, inittab, and securetty files will need to be updated. Luckily, there are a couple of distros interested in supporting Xen who I suspect will be able to help.

-- Hollis Blanchard IBM Linux Technology Center

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