From: "H. Peter Anvin" <hpa@zytor.com>
To: Kevin O'Connor <kevin@koconnor.net>
Cc: "H. Peter Anvin" <hpa@linux.intel.com>,
qemu-devel@nongnu.org, kraxel@redhat.com
Subject: Re: [Qemu-devel] [PATCH] debugcon: support for debugging consoles (e.g. Bochs port 0xe9)
Date: Fri, 01 Jan 2010 19:01:51 -0800 [thread overview]
Message-ID: <4B3EB71F.2020203@zytor.com> (raw)
In-Reply-To: <20091230164946.GA9858@morn.localdomain>
On 12/30/2009 08:49 AM, Kevin O'Connor wrote:
> On Tue, Dec 29, 2009 at 01:51:36PM -0800, H. Peter Anvin wrote:
>> Add generic support for debugging consoles (simple I/O ports which
>> when written to cause debugging output to be written to a target.)
>> The current implementation matches Bochs' port 0xe9, allowing the same
>> debugging code to be used for both Bochs and Qemu.
>>
>> There is no vm state associated with the debugging port, simply
>> because it has none -- the entire interface is a single, stateless,
>> write-only port.
>>
>> Most of the code was cribbed from the serial port driver.
>
> Hi,
>
> SeaBIOS writes debugging info to port 0x0402. Unfortunately, qemu has
> to be recompiled in order to display this info. Will your patch
> enable one to get at the 0x0402 data without recompiling?
>
Yes.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next parent reply other threads:[~2010-01-02 3:03 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1262123496-12007-1-git-send-email-hpa@linux.intel.com>
[not found] ` <20091230164946.GA9858@morn.localdomain>
2010-01-02 3:01 ` H. Peter Anvin [this message]
2010-01-02 3:02 ` [Qemu-devel] [PATCH] debugcon: support for debugging consoles (e.g. Bochs port 0xe9) H. Peter Anvin
2010-01-02 17:53 ` Kevin O'Connor
2010-01-02 18:56 ` H. Peter Anvin
2010-01-03 2:13 ` François Revol
2010-01-04 14:13 ` [Qemu-devel] " Gerd Hoffmann
2010-01-08 16:36 ` [Qemu-devel] " Anthony Liguori
2009-12-03 5:04 H. Peter Anvin
-- strict thread matches above, loose matches on Subject: below --
2009-12-03 3:11 H. Peter Anvin
2009-12-03 4:02 ` malc
2009-11-20 21:33 H. Peter Anvin
2009-11-23 10:52 ` Gerd Hoffmann
2009-11-23 20:11 ` H. Peter Anvin
2009-11-24 23:05 ` H. Peter Anvin
2009-11-25 7:33 ` Alexander Graf
2009-11-25 12:46 ` Gerd Hoffmann
2009-11-25 18:01 ` H. Peter Anvin
2009-11-25 22:21 ` Gerd Hoffmann
2009-11-25 22:26 ` H. Peter Anvin
2009-11-25 22:31 ` H. Peter Anvin
2009-11-25 22:54 ` Gerd Hoffmann
2009-11-26 9:56 ` Markus Armbruster
2009-11-25 22:53 ` H. Peter Anvin
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