Hello all,
this mail is related to a post by Axel Schöner that I found at
http://article.gmane.org/gmane.comp.emulators.xen.user/40621
when I was searching the WEB about solutions to my problem.
I would like to confirm that VT-d with XEN 3.3 kernel 2.6.18.8 on mainboard
Intel DQ45CB seems to be broken.
Survey (details are down below)
---------------------------------------
Whenever I boot my Xen 2.6.18.8 (Xen 3.3) with kernel parameter iommu=1
the boot process freezes.
I see:
...
(XEN) Intel VT-d has been enabled
...
(XEN) HVM: VMX enabled
...
(XEN) I/O virtualisation enabled
(XEN) I/O virtualisation for PV guests disabled
Here the boot process freezes
Does anybody else suffer from the same problem (VT-d with Intel board DQ45CB)?
Any suggestions about a solution?
Regards,
Franz
Details about my setup
----------------------------
Hardware:
Mainboard Intel DQ45CB
CPU: Intel Core 2 Quad 9550
RAM: 8GB
OS: Debian Linux Etch 4.0 R3
The plain standard with kernel 2.6.18, the 64bit flavour
XEN: (compiled from the soruces)
Mercurial:
dpkg -i ./mercurial-common_1.0.1-5.1~bpo40+1_all.deb
dpkg -i ./mercurial_1.0.1-5.1~bpo40+1_amd64.deb
Xen source:
wget http://bits.xensource.com/oss-xen/release/3.3.0/xen-3.3.0.tar.gz
Xen kernel tree:
hg clone http://xenbits.xensource.com/linux-2.6.18-xen.hg
Kernel Config:
Defaults apart from
make linux-2.6-xen-config CONFIGMODE=menuconfig
change XEN->"PCI-device backend driver" from "M" to "*".
According to messages on the WEB compiling the backend driver fixed into the
kernel is required
in order to get pciback.hide running via kernel parameter.
GRUB config:
title Xen 3.3.0 / kernel 2.6.18.8-xen backhide the ATI Radeon
root (hd0,0)
#kernel /xen-3.3.0.gz console=vga noreboot max_loop=128 dom0_mem=1024M
iommu=1
kernel /xen-3.3.0.gz console=vga noreboot max_loop=128 dom0_mem=1024M
module /vmlinuz-2.6.18.8-xen root=/dev/mapper/RootVG-root ro
console=tty0 pciback.hide=(01:00.0)(01:00.1)
module /initrd-2.6.18.8-xen.img
savedefault
Output of 'xm dmesg' after booting without 'iommu=1'
susi:/boot/grub# xm dmesg
__ __ _____ _____ ___
\ \/ /___ _ __ |___ / |___ / / _ \
\ // _ \ '_ \ |_ \ |_ \| | | |
/ \ __/ | | | ___) | ___) | |_| |
/_/\_\___|_| |_| |____(_)____(_)___/
(XEN) Xen version 3.3.0 (root@xxxxxxxxx) (gcc version 4.1.2 20061115
(prerelease) (Debian 4.1.1-21)) Tue Oct 21 16:22:47 CEST 2008
(XEN) Latest ChangeSet: unavailable
(XEN) Command line: console=vga noreboot max_loop=128 dom0_mem=1024M
(XEN) Video information:
(XEN) VGA is text mode 80x25, font 8x16
(XEN) VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN) EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN) Found 2 MBR signatures
(XEN) Found 2 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN) 0000000000000000 - 0000000000095c00 (usable)
(XEN) 0000000000095c00 - 00000000000a0000 (reserved)
(XEN) 00000000000e0000 - 0000000000100000 (reserved)
(XEN) 0000000000100000 - 00000000bd6e0000 (usable)
(XEN) 00000000bd6e0000 - 00000000bd722000 (ACPI NVS)
(XEN) 00000000bd722000 - 00000000bd840000 (reserved)
(XEN) 00000000bd840000 - 00000000bd843000 (ACPI NVS)
(XEN) 00000000bd843000 - 00000000bd943000 (reserved)
(XEN) 00000000bd943000 - 00000000bd944000 (ACPI NVS)
(XEN) 00000000bd944000 - 00000000bd949000 (reserved)
(XEN) 00000000bd949000 - 00000000bd951000 (ACPI data)
(XEN) 00000000bd951000 - 00000000bd96c000 (ACPI NVS)
(XEN) 00000000bd96c000 - 00000000bd98a000 (reserved)
(XEN) 00000000bd98a000 - 00000000bd990000 (ACPI NVS)
(XEN) 00000000bd990000 - 00000000bdb00000 (usable)
(XEN) 00000000bdc00000 - 00000000c0000000 (reserved)
(XEN) 00000000fed1c000 - 00000000fed20000 (reserved)
(XEN) 00000000ff000000 - 0000000100000000 (reserved)
(XEN) 0000000100000000 - 000000023c000000 (usable)
(XEN) System RAM: 8087MB (8282004kB)
(XEN) ACPI: RSDP 000F03C0, 0024 (r2 INTEL)
(XEN) ACPI: XSDT BD94FE18, 005C (r1 INTEL DQ45CB 3B MSFT 10013)
(XEN) ACPI: FACP BD94ED98, 00F4 (r4 INTEL A M I 6222004 MSFT 10013)
(XEN) ACPI: DSDT BD949018, 4E98 (r1 INTEL DQ45CB 3B INTL 20051117)
(XEN) ACPI: FACS BD957F40, 0040
(XEN) ACPI: APIC BD94EF18, 006C (r2 INTEL DQ45CB 3B MSFT 10013)
(XEN) ACPI: MCFG BD959E18, 003C (r1 INTEL DQ45CB 3B MSFT 97)
(XEN) ACPI: ASF! BD958D18, 00A0 (r32 INTEL DQ45CB 3B TFSM F4240)
(XEN) ACPI: SPCR BD959D18, 0050 (r1 INTEL DQ45CB 3B AMI. 3)
(XEN) ACPI: TCPA BD959C98, 0032 (r2 INTEL DQ45CB 3B MSFT 1000013)
(XEN) ACPI: DMAR BD943C18, 0120 (r1 INTEL DQ45CB 3B INTL 1)
(XEN) Xen heap: 14MB (14496kB)
(XEN) Domain heap initialised
(XEN) Processor #0 7:7 APIC version 20
(XEN) Processor #1 7:7 APIC version 20
(XEN) Processor #2 7:7 APIC version 20
(XEN) Processor #3 7:7 APIC version 20
(XEN) IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2833.050 MHz processor.
(XEN) HVM: VMX enabled
(XEN) CPU0: Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz stepping 07
(XEN) Booting processor 1/1 eip 8c000
(XEN) CPU1: Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz stepping 07
(XEN) Booting processor 2/2 eip 8c000
(XEN) CPU2: Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz stepping 07
(XEN) Booting processor 3/3 eip 8c000
(XEN) CPU3: Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz stepping 07
(XEN) Total of 4 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN) -> Using new ACK method
(XEN) checking TSC synchronization across 4 CPUs: passed.
(XEN) Platform timer is 3.579MHz ACPI PM Timer
(XEN) Brought up 4 CPUs
(XEN) I/O virtualisation disabled
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen kernel: 64-bit, lsb, compat32
(XEN) Dom0 kernel: 64-bit, lsb, paddr 0xffffffff80200000 -> 0xffffffff805c050c
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN) Dom0 alloc.: 0000000232000000->0000000234000000 (253952 pages to be
allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN) Loaded kernel: ffffffff80200000->ffffffff805c050c
(XEN) Init. ramdisk: ffffffff805c1000->ffffffff81506800
(XEN) Phys-Mach map: ffffffff81507000->ffffffff81707000
(XEN) Start info: ffffffff81707000->ffffffff817074a4
(XEN) Page tables: ffffffff81708000->ffffffff81717000
(XEN) Boot stack: ffffffff81717000->ffffffff81718000
(XEN) TOTAL: ffffffff80000000->ffffffff81800000
(XEN) ENTRY ADDRESS: ffffffff80200000
(XEN) Dom0 has maximum 4 VCPUs
(XEN) Scrubbing Free RAM:
......................................................................done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to
Xen)
(XEN) Freed 108kB init memory.
Additional problem respectively disappointments with the board DB45CB
---------------------------------------------------------------------------------------
Now, I just need to get rid of my frustrations. Of course, some or all of them
might be caused by my
personal lack of Linux or Xen experience ...
- I am not able to configure the onboard GB ethernet adapter on Linux.
Even the e1000e driver
susi:/lib/modules/2.6.26-bpo.1-amd64/kernel/drivers/net/e1000e
of newer kernels does not seam to support that adapter.
As a fix I run addtional NICs in PCI and PCIe slots (inetl 1000 pro, various
brands)
The onboard LAN is unused.
- I was not able to make any use of the remote management features of the board.
On my DHCP server I see that the onboard NIC applies for an IP address and
gets
one from the DHCP server.
There do not seem to be any management clients available for Linux.
The Intel AMT was one reason why I bought that board. However, I do not like
to use
any windows clients for the remote management.
- I am not able to get Xorg running with the onboard graphics adapter.
There is no support for the Q45 Chipset (at least not in the 2.6.18-6, 2.6.24
and of course not in the xen kernels)
- When I insert a PCIe x16 Graphics card (ATI Radeon HD 2400 Pro) the BIOS menu
display somehow becomes slow.
The experience is like if you use a 300 Baut serial line connection.
I was able to configure xorg including 3D with the fglrx driver from ATI
ati-driver-installer-8-5-x86.x86_64.run
xserver-xorg-core 1.1.1-21etch5
and running it on the non-Xen kernel vmlinuz-2.6.18-6-amd64 (Etch)
Although the BIOS menus are slow, the system boots and X11 is functional with
3D.
I don't know whether the ATI Radeon HD 2400 Pro is performing as fast as it
should but
the experience is not too bad.
However, if I boot the xen kernel vmlinuz-2.6.18.8-xen the system becomes
very very slow.
The system needs about 15 minutes to boot and is unusable.
As a result I switched back to the onboard graphics adapter (Intel) and run
my Xen host without X11.
I plan to test another PCIe x16 graphics adaptor (NVIDIA GeForce 8400GS).
I am just curious whether the problem with the PCIe x16 graphics adapter is
caused by the RADEON card
or whether it is an issue of the mainboard.
- After I ran into the problem with the graphics adapter I planned to test the
VT-d with a HVM Windows guest
and PCI backend hide. However, with the mandatory iommu=1 the Xen-Kernel
freezes.
This wracks another option :-(
In summary I am rather disappointed by the board DB45CB as a platform for XEN.
- VT-d broken. No PCI backend hiding with HVM guest possible
- no onboard LAN on linux
- no remote management from linux
- no onboard graphics on linux
- PCIe x16 graphics with Xen kernel broken
On the positive side I can state the following results:
- Xen host without X11 (xorg) runs perfectly (especially fast).
- I was able to configure and run a WinXP HVM guest (although without VT-d and
PCI backend hiding)
Is there someone out who can show me light at the end of the tunnel?
Hello Intel developers at xen-users:
Is there a chance that some BIOS update for the DB45CB may fix the problems?
What can I do to support such a fix? Provide further evidence, run tests?
Hello Xen developers at xen-users:
Is there a change that some updates of the Xen sources or Xen kernel will fix
the problems?
What can I do to support such a fix? Provide further evidence, run tests?
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