Re: [Xen-devel] XEN Panic with VT-d support enabled on Xeon E55xx platform

["Zhao, Yu" <yu.zhao@xxxxxxxxx>]

Hi Francois,

Do you have this problem all the times? Can you please grab some logs 
and send them to me? The dmesg from a native kernel if you can't boot up 
any version of Xen, and the whole Xen hypervisor log would help us to 
figure out the problem.
Thanks,
Yu


Isabelle, Francois wrote:
> Hi all,
>
> I'm working with a board on which XEN panics with the following message (see 
> below). From what I can see on the lists, most of the problems on these 
> platforms seem to be related to broken DMAR tables and RMRR, but this platform 
> passes the VT-d firmware toolkit (http://edc.intel.com/Platforms/Xeon-5500/) 
> successfully so I'm tented to blame XEN for it... should I file a bug entry?
>
> > From what I can see in the 'queue invalidation' code, a timeout is reached. As anyone seen this on a similar platform? 
>
> (XEN) Xen version 3.4-unstable (root@localdomain) (gcc version 4.1.2 20080704 
> (Red Hat 4.1.2-44)) Fri Apr  3 14:20:00 EDT 2009
> (XEN) Latest ChangeSet: Mon Mar 30 16:48:26 2009 +0100 19433:d5ddc782bc49
> (XEN) Command line: console=com1 com1=115200,8n1  iommu=1 loglvl=all 
> loglvl_guest=all ro
>
> ..
> (XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
> (XEN) ACPI: HPET id: 0xffffffff base: 0xfed00000
> (XEN) [VT-D]dmar.c:485: Host address width 39
> (XEN) [VT-D]dmar.c:494: found ACPI_DMAR_DRHD
> (XEN) [VT-D]dmar.c:349: dmaru->address = fbffe000
> (XEN) [VT-D]dmar.c:306: found IOAPIC: bdf = f0:1f.7
> (XEN) [VT-D]dmar.c:358: found INCLUDE_ALL
> (XEN) [VT-D]dmar.c:498: found ACPI_DMAR_RMRR
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.0
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.1
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.2
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.7
> (XEN) [VT-D]dmar.c:498: found ACPI_DMAR_RMRR
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.0
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.1
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.2
> (XEN) [VT-D]dmar.c:300: found endpoint: bdf = 0:1d.7
> (XEN) [VT-D]dmar.c:502: found ACPI_DMAR_ATSR
> (XEN) [VT-D]dmar.c:287: found bridge: bdf = 0:3.0  sec = 5  sub = 5
> (XEN) [VT-D]dmar.c:287: found bridge: bdf = 0:4.0  sec = 6  sub = e
> (XEN) [VT-D]dmar.c:287: found bridge: bdf = 0:5.0  sec = 3  sub = 3
> (XEN) [VT-D]dmar.c:287: found bridge: bdf = 0:7.0  sec = 18  sub = 18
> (XEN) [VT-D]dmar.c:287: found bridge: bdf = 0:8.0  sec = f  sub = 17
> (XEN) [VT-D]dmar.c:287: found bridge: bdf = 0:9.0  sec = 4  sub = 4
> (XEN) [VT-D]dmar.c:287: found bridge: bdf = 0:a.0  sec = 2  sub = 2
> ..
> (XEN) Intel VT-d Snoop Control supported.
> (XEN) Intel VT-d DMA Passthrough not supported.
> (XEN) Intel VT-d Queued Invalidation supported.
> (XEN) Intel VT-d Interrupt Remapping supported.
> (XEN) DMAR_IQA_REG = 7f79d000
> (XEN) DMAR_IQH_REG = 0
> (XEN) DMAR_IQT_REG = 20
> (XEN) 
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) queue invalidate wait descriptor was not executed
> (XEN) ****************************************
> (XEN) 
> (XEN) Reboot in five seconds...
> François Isabelle
>
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