Re: [Qemu-devel] memtest 4.20+ does not work with -cpu host

[Paolo Bonzini]

Il 13/09/2012 09:57, Gleb Natapov ha scritto:
>>> > > 
>>> > > #rdmsr -0 0x194
>>> > > 0000000000011100
>>> > > #rdmsr -0 0xce
>>> > > 00000c0004011103
>> > 
>> > Yes, that can help implementing it in KVM.  But without a spec to
>> > understand what the bits actually mean, it's just as risky...
>> > 
>> > Peter, do you have any idea where to get the spec of the memory
>> > controller MSRs in Nehalem and newer processors?  Apparently, memtest is
>> > using them (and in particular 0x194) to find the speed of the FSB, or
>> > something like that.
>> > 
> Why would anyone will want to run memtest in a vm? May be just add those
> MSRs to ignore list and that's it.

>From the output it looks like it's basically a list of bits.  Returning
something sensible is better, same as for the speed scaling MSRs.

Paolo