From: "Mihai Donțu" <mihai.dontu@gmail.com>
To: wogiz@openmailbox.org
Cc: xen-devel@lists.xen.org
Subject: Re: Bug in x86 instruction emulator?
Date: Wed, 6 Apr 2016 02:57:35 +0300 [thread overview]
Message-ID: <20160406025735.1ffbb1a6@mdontu-l> (raw)
In-Reply-To: <20e259d208b95167bb495a6ed0bf684d@openmailbox.org>
On Wed, 06 Apr 2016 01:38:32 +0200 wogiz@openmailbox.org wrote:
> I'm running Xen 4.6.1 with Alpine Linux 3.3.3 in dom0. In a HVM domU
> with vga="qxl", Xorg will segfault instantly if tried started. Multiple
> Linux distros have been tested and Xorg segfaults in all.
>
> Attached are a full backtrace from domU generated by Xorg, and a
> assembler dump of function 'sse2_blt'.
>
> According to Xen IRC channel, the cause could be a bug in the x86
> instruction emulator related to SSE.
I don't believe the x86 emulator is complete wrt the SSE instruction
set. But I do wonder why, in your case, these instructions need
emulation at all. Unless touching the video RAM requires emulation. Can
you try using a different video driver? I see xorg picked up qxl, maybe
try vesa?
--
Mihai Donțu
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-04-05 23:57 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 23:38 Bug in x86 instruction emulator? wogiz
2016-04-05 23:57 ` Mihai Donțu [this message]
2016-04-06 0:02 ` Mihai Donțu
2016-04-06 1:48 ` wogiz
2016-04-06 1:26 ` wogiz
2016-04-06 8:55 ` Andrew Cooper
2016-04-07 1:26 ` wogiz
2016-04-07 2:04 ` Jan Beulich
2016-04-08 1:43 ` wogiz
2016-04-15 17:33 ` wogiz
2016-04-15 17:44 ` Andrew Cooper
2016-04-16 4:06 ` wogiz
2016-05-04 16:02 ` Jan Beulich
2016-05-04 16:04 ` Wei Liu
2016-05-04 16:06 ` Andrew Cooper
2016-05-17 16:53 ` William Z.
2016-05-17 17:03 ` Andrew Cooper
2016-05-18 9:12 ` Jan Beulich
2016-05-20 16:44 ` William Z.
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=20160406025735.1ffbb1a6@mdontu-l \
--to=mihai.dontu@gmail.com \
--cc=wogiz@openmailbox.org \
--cc=xen-devel@lists.xen.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).