From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: Jason Wessel <jason.wessel@windriver.com>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] upgrading emulated UART to 16550A
Date: Tue, 05 Aug 2008 16:15:47 +0100 [thread overview]
Message-ID: <48986EA3.4070405@eu.citrix.com> (raw)
In-Reply-To: <48986B89.8000608@windriver.com>
Jason Wessel wrote:
> I didn't spend the time to figure out what was wrong, but I thought I'd
> try your new port emulation against KGDB which is known to work with
> real hardware, as well as the existing 16450 qemu uart support.
>
> For some reason, the initial interrupt if a character comes into the
> uart does not seem to get raised, so the kernel routine which handles
> the traffic never gets invoked. It is possible that the that the kgdb
> kernel driver has a defect, but this does seem to work on real hardware,
> so perhaps it is a timing problem or the qemu emulation is not quite
> accurate with respect to the real hardware.
>
> If you like, I can provide you a bzImage and the qemu invocation, such
> that you could see the problem first hand.
>
yeah, that could help.
next prev parent reply other threads:[~2008-08-05 15:14 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-05 13:15 [Qemu-devel] [PATCH] upgrading emulated UART to 16550A Stefano Stabellini
2008-08-05 13:57 ` Thiemo Seufer
2008-08-05 14:17 ` Stefano Stabellini
2008-08-05 15:02 ` Jason Wessel
2008-08-05 15:15 ` Stefano Stabellini [this message]
2008-08-06 2:28 ` Anthony Liguori
-- strict thread matches above, loose matches on Subject: below --
2008-08-07 17:35 Stefano Stabellini
2008-08-07 18:58 ` Anthony Liguori
2008-08-07 21:02 ` Samuel Thibault
2008-08-07 21:13 ` Anthony Liguori
2008-08-07 21:39 ` Samuel Thibault
2008-08-08 14:36 ` Stefano Stabellini
2008-08-07 19:26 ` Jason Wessel
2008-08-08 14:55 Stefano Stabellini
2008-08-08 15:15 ` Stefano Stabellini
2008-08-08 16:58 Stefano Stabellini
2008-08-09 18:26 ` Anthony Liguori
2008-08-09 18:44 ` Samuel Thibault
2008-08-11 14:17 ` Anthony Liguori
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=48986EA3.4070405@eu.citrix.com \
--to=stefano.stabellini@eu.citrix.com \
--cc=Ian.Jackson@eu.citrix.com \
--cc=jason.wessel@windriver.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).