From: Avi Kivity <avi@redhat.com>
To: "Passera, Pablo R" <pablo.r.passera@intel.com>
Cc: "Fischer, Anna" <anna.fischer@hp.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: Problem doing pci passthrough of the network card without VT-d
Date: Mon, 18 May 2009 00:17:11 +0300 [thread overview]
Message-ID: <4A107ED7.1070100@redhat.com> (raw)
In-Reply-To: <18C018878FB0244EB71B7FE328978A3224B026A3@rrsmsx503.amr.corp.intel.com>
Passera, Pablo R wrote:
> Hi Anna,
>
>
>> Are you expecting this to work using the 1:1 mapping for direct device assignment?
>>
> Actually, I want to use the current qemu implementation for this. AFAIK from the code seems that qemu mmaps the device memory into the qemu pci subsystem memory space. Is this correct?
>
It does, but without 1:1 mapping or pvdma, we can't tell the device
where to dma.
>> In fact I don't get any errors on the guest side, so it is hard to track what is wrong.
>>
> In the guest I am getting an error in dmesg saying "Detected Tx Unit Hang"
>
You're lucky, you could have total memory corruption in the host.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next prev parent reply other threads:[~2009-05-17 21:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-12 18:21 Problem doing pci passthrough of the network card without VT-d Passera, Pablo R
2009-05-13 17:22 ` Fischer, Anna
2009-05-13 17:41 ` Passera, Pablo R
2009-05-17 21:17 ` Avi Kivity [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-05-12 15:13 Passera, Pablo R
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=4A107ED7.1070100@redhat.com \
--to=avi@redhat.com \
--cc=anna.fischer@hp.com \
--cc=kvm@vger.kernel.org \
--cc=pablo.r.passera@intel.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.