From: Andrew Cooper <andrew.cooper3@citrix.com>
To: "Dennis Lan (dlan)" <dennis.yxun@gmail.com>
Cc: xen-devel@lists.xenproject.org, IAN DELANEY <della5@iinet.com.au>
Subject: Re: fail to detect VT-D on Dell (optiplex 760)
Date: Wed, 31 Jul 2013 13:01:54 +0100 [thread overview]
Message-ID: <51F8FCB2.9030706@citrix.com> (raw)
In-Reply-To: <CAF1ZMEdpeCYYVUFsM3_vs55ZFs3guqQwZ7KxSHdkGAF3ha+=_A@mail.gmail.com>
On 31/07/13 12:13, Dennis Lan (dlan) wrote:
> HI Devs:
> I have problem to boot with VT-D enabled on my machine, with
> Xen-4.3.0, it just hangs[0]. But with 4.4-unstable version, it boot
> successfully but still fail to detect iommu.
>
> I'm using xen-git master branch,commit: 6072b7c808043b6886c33f896e06fc32ee28346e
>
> also you can refer [1] for more information.
> interesting bits from xen-4.4-unstable, full log is here[2]
>
> (XEN) vmap(ffff82c000201000:0x1)
> (XEN) [VT-D]iommu.c:1167: IOMMU: unsupported
> (XEN) ---- print_iommu_regs ----
> (XEN) drhd->address = fedc1000
> (XEN) VER = ffffffff
> (XEN) CAP = ffffffffffffffff
> (XEN) n_fault_reg = 100
> (XEN) fault_recording_offset = 3ff0
> (XEN) ECAP = ffffffffffffffff
> (XEN) GCMD = ffffffff
> (XEN) GSTS = ffffffff
> (XEN) RTADDR = ffffffffffffffff
> (XEN) CCMD = ffffffffffffffff
> (XEN) FSTS = ffffffff
> (XEN) FECTL = ffffffff
> (XEN) FEDATA = ffffffff
> (XEN) FEADDR = ffffffff
> (XEN) FEUADDR = ffffffff
> (XEN) vunmap(ffff82c000201000:0x1)
> (XEN) Failed to parse ACPI DMAR. Disabling VT-d.
> (XEN) ERST table was not found
> (XEN) Using ACPI (MADT) for SMP configuration information
According to this, the DMAR table is problematic. This is the ACPI
table which describes the IOMMU functionality. Do you have a BIOS
upgrade available?
~Andrew
>
> btw, Ian, I also keep you CCed.
>
> [0] https://bugs.gentoo.org/show_bug.cgi?id=479082#c3
> [1] https://bugs.gentoo.org/show_bug.cgi?id=479082
> [2] https://479082.bugs.gentoo.org/attachment.cgi?id=354706
>
> Dennis Lan (dlan)
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2013-07-31 12:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-31 11:13 fail to detect VT-D on Dell (optiplex 760) Dennis Lan (dlan)
2013-07-31 12:01 ` Andrew Cooper [this message]
2013-08-01 3:08 ` Zhang, Yang Z
2013-08-01 6:24 ` Dennis Lan (dlan)
2013-08-01 6:34 ` Zhang, Yang Z
2013-08-01 8:16 ` Dennis Lan (dlan)
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=51F8FCB2.9030706@citrix.com \
--to=andrew.cooper3@citrix.com \
--cc=della5@iinet.com.au \
--cc=dennis.yxun@gmail.com \
--cc=xen-devel@lists.xenproject.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 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.