Hello Gentlemen,

we have two HP ProLiant DL380 G6 servers with Intel Xeon E5530
processors running libvirt on SL(kernel 2.6.32-131.6.1.el6.x86_64) to
host our Linux and Windows servers. (We migrated from Citrix XenServer)

The problem is that Windows servers (64bit) running on KVM crash
periodically. With the following event log message:
	Error code 000000000000003b, parameter1 0000000080000003, parameter2
fffff80001039900, parameter3 fffffadfe125fd50, parameter4
0000000000000000.

The host servers have this in their dmesg that looks suspicious to me:
	Performance Events: PEBS fmt1+, Nehalem events, Broken BIOS detected,
complain to your hardware vendor.
	[Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 38d is
330)

Also host servers get this message in the logs:
	kernel: kvm: 2323: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0xabcd

I myself have a ML150 G6 with Intel Xeon E5504 that runs SL6 and libvirt
with a Windows server without a hitch.

Any advice is appreciated since I tried looking for the solution and
nothing helped me.

Regards,
-- 
HALAC Matej
IT
Canberra - Packard, s.r.o.
Slovak Republic