From: "Stéphanie Ouillon" <steph.ouillon@gmail.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] error "kvm: virtio: trying to map MMIO memory"
Date: Sun, 17 Jul 2011 20:06:11 +0200 [thread overview]
Message-ID: <4E232493.4060500@gmail.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 1079 bytes --]
Hello,
I am porting virtio device drivers for DragonFly BSD for a GSoC project. [1]
I have been facing a problem for 3-4 days with my virtio network device
driver in qemu: when I load the driver, I get the following error:
kvm: virtio: trying to map MMIO memory
And then the machine crashes immediately (I started the vm in a screen
to see this message).
It seems to be linked with the call of a bus_space_write_2 function [2]
inside a virtio_enqueue_commit function in virtio.c [3]. But without
more information about this type of error message (I found some patches
or bug reports on the net, but I am not sure they match in my case), I
found it difficult to locate it.
Would anybody have a clue about what kind of bug would provoke this
error in qemu ?
Thank you !
Stéphanie Ouillon
[1] http://github.com/arroway/virtio_DragonFlyBSD/tree/dev-net/net
[2] source code in DragonFly BSD
http://fxr.watson.org/fxr/source/cpu/i386/include/bus_at386.h?v=DFBSD;im=bigexcerpts#L887
[3] at l.465:
http://github.com/arroway/virtio_DragonFlyBSD/blob/dev-net/virtio.c
[-- Attachment #2: Type: text/html, Size: 1951 bytes --]
next reply other threads:[~2011-07-17 18:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-17 18:06 Stéphanie Ouillon [this message]
2011-07-18 12:16 ` [Qemu-devel] error "kvm: virtio: trying to map MMIO memory" Stefan Hajnoczi
2011-07-20 9:52 ` Stéphanie Ouillon
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=4E232493.4060500@gmail.com \
--to=steph.ouillon@gmail.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).