On Thu, Sep 13, 2012 at 10:00:26AM +0200, Paolo Bonzini wrote:
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.
Everything is list of bits in computers :) At least 0xce is documented in SDM.
It cannot be implemented in a migration safe manner.