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Re: [Qemu-devel] [PATCH] chardev: add baud parameter for serial host dev

From: Gerd Hoffmann
Subject: Re: [Qemu-devel] [PATCH] chardev: add baud parameter for serial host device
Date: Mon, 10 Jun 2013 07:56:01 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130513 Thunderbird/17.0.6

On 06/08/13 23:49, Peter Wu wrote:
> When QEMU starts, it always changes the serial port parameters including baud
> rate. This confused my guest which thought it was outputting at 9600 baud 
> while
> it was in fact changed to 115200.
> After this patch, I can use `-serial /dev/ttyS0,baud=9600` to override the
> default baud rate of 115200.

I think we should just flip the default to 9600.  IIRC this is the
power-on default baud rate of the 8250 uart family, so this should be
the qemu default too.  If a guest wants to use a higher baudrate it has
to reprogram the uart anyway (and qemu will apply the guest changes to
the host uart).


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