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

["Isabelle, Francois" <Francois.Isabelle@xxxxxxxxxxxxxx>]

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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