I am running linux 3.13.0-71 on two Xeon E5-2603 which did, at some point, support KVM.
I had to reboot (running 3.8.0-35 before) and somehow lost all KVM support. The flags I get are:
fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 cx16 sse4_1 sse4_2 popcnt tsc_deadline_timer aes xsave avx hypervisor lahf_lm arat epb xsaveopt pln pts dtherm
As you can see, vmx and svm are not listed.
I did a cold boot, I updated my BIOS, cleared CMOS (I was unable to verify this) and did a cold boot after (unplugged power until LEDs went out).
rdmsr 0x3a returns "7", I do not know what that means though.
BIOS "screenshot" before bios update (looks the same now): http://imgur.com/a/8LbUL
How can I get back support for KVM again?