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Re: [Xen-devel] Xen 4.3 development update RC2 imminent

create !
title -1 libxl cpuid features different than Linux features

On 23/05/13 15:17, Fabio Fantoni wrote:
Tried with Raring (ubuntu 13.04) 32bit...
in cfg:

# xl create /etc/xen/RARING.cfg
Parsing config from /etc/xen/RARING.cfg
while parsing CPUID flag: "sse4_1=0":
 error #2: unknown CPUID flag name
while parsing CPUID flag: "sse4_2=0":
 error #2: unknown CPUID flag name

In domU:
# cat /proc/cpuinfo | grep sse
flagsÂÂÂÂÂÂÂÂÂÂ : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
Âpat pse36 clflush mmx fxsr ht nx rdtscp lm constant_tsc pni cx16 sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer hypervisor lahf_lm

libxl seems to call these sse4.1 and sse4.2 respectively. We should think about duplicating Linux to make this sort of thing easy.

It would probably be a good idea to have a way to list the supported cpuid feature names from xl as well.

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