On 2011-05-03 15:31, Avi Kivity wrote: > On 05/03/2011 01:37 PM, Jan Kiszka wrote: >>> >>> Yes. Unfortunately that is very vendor and model specific. The >>> architectural PMU is supported, but that is only available on Intel. >> >> Is it supposed to have any practical value already? I did not yet find a >> magic -cpu switch to let Linux detect anything, not to speak of perf or >> watchdog support. > > On the guest side it is supported for the watchdog > (arch/x86/kernel/cpu/perfctr-watchdog.c, look for > X86_FEATURE_ARCH_PERFMON). It's also mentioned in perf_event_intel.c, > but I don't know if it will work without the other PMU features being > present. I've tested with some SUSE 2.6.38 guest kernel, and it complained like this: (-cpu kvm64) Performance Events: unsupported Netburst CPU model 6 no PMU driver, software events only. NMI watchdog disabled (cpu0): hardware events not enabled or (-cpu host) Performance Events: unsupported p6 CPU model 37 no PMU driver, software events only. NMI watchdog disabled (cpu0): hardware events not enabled Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
