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Re: [Xen-devel] serial8250: too much work for irq4

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] serial8250: too much work for irq4
From: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date: Wed, 18 Feb 2009 17:49:22 +0000
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Markus Armbruster <armbru@xxxxxxxxxx>
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Keir Fraser writes ("Re: [Xen-devel] serial8250: too much work for irq4"):
> Perhaps we could add a qemu command-line option to force accurate uart
> emulation w.r.t. programmed FIFO depth and baud rate? Then those who want
> this more accurate but more expensive and slower behaviour can configure it.

That would certainly be possible.  Our hw/serial.c is very like
upstream's, and the same issue will apply to (for example) KVM, so we
should coordinate any such change with upstream.  I would suggest we
crosspost the patch to xen-devel and qemu-devel.

Markus: are you sufficiently bothered about this that you'd like to
supply a patch to change the behaviour in the way Keir suggests :-).

Ian.

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