[Xen-users] No vmx flag for Intel T9400

[Artur Fejklowicz <art@xxxxxxxxxxxxx>]

Hi

I have Intel Core 2 Duo T9400 processor and I'm running dom0 on Gentoo 
2.6.21 kernel. I also tried Gentoo 2.6.18-r12 kernel but in this two 
cases there was no vmx flag in:
localhost ~ # grep vmx /proc/cpuinfo
localhost ~ # grep flags /proc/cpuinfo
flags        : fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush 
acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc pni est ssse3 
cx16 lahf_lm
flags        : fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush 
acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc up pni est ssse3 
cx16 lahf_lm
localhost ~ #

When I start non Xen Gentoo standard kernel 2.6.25-gentoo-r7 I get vmx 
flag and many more:
localhost ~ # grep vmx /proc/cpuinfo
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe 
syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor 
ds_cpl vmx smx est tm2 ssse3 cx16 xtpr sse4_1 lahf_lm
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe 
syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni monitor 
ds_cpl vmx smx est tm2 ssse3 cx16 xtpr sse4_1 lahf_lm
localhost ~ #


Intel confirms that Core 2 Duo T9400 supports Intel Virtualization 
Technology (table: "Intel Coreâ2 Duo Processor Features"):
http://www.intel.com/cd/channel/reseller/asmo-na/eng/products/mobile/processors/core2duo_m/feature/index.htm

Is there any thing I might do wrong compiling Xen kernels?
I wanted to start Windows HVM and I think without vmx it won't start or 
would it?
Why under Xen kernel only the second core has "up" flag?

I have other machine with 2xIntel Xeon E5310 and dom0 kernel: Gentoo 
2.6.20-xen-r6 and it shows vmx flag as it should.

Best Regards
Artur Fejklowicz


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