Re: [ANNOUNCE] kvm userspace release 6

[Michael Riepe <michael-0QoEqw4nQxo@public.gmane.org>]

Hi!

Avi Kivity wrote:
> Michael Riepe wrote:
> 
>> By the way: I get myriads of "kvm: unhandled rdmsr: c0000081" messages
>> in my syslog, but they don't seem to cause any further harm.
>>   
> 
> 
> Which guest does this happen with? AFAICT this should be handled well
> (vmx.c:vmx_get_msr() -> find_msr_entry())

With all of them.

> If you'd like to debug this, you can add printk()s to see where
> vmx_get_msr() loses its way.

vmx_get_msr() actually works fine. The problem is in vmx_vcpu_setup(),
in the loop starting at line 1142. It tries to read all the MSRs listed
in vmx_msr_index, but it fails for MSR_K6_STAR. With earlier releases, I
also used to see the kernel message "kvm: msrs: 1" - that is, only
MSR_EFER is found. According to Intel's docs, that's correct - the
register does not exist on a Core Duo which isn't 64-bit capable (but,
of course, on a Core 2 Duo - or a Xeon 51xx/53xx, aka "Woodcrest" and
"Clovertown").

-- 
Michael "Tired" Riepe <michael-0QoEqw4nQxo@public.gmane.org>
X-Tired: Each morning I get up I die a little

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys - and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV