KVM support for TSC scaling

Hi Avi, Marcelo,

here is the patch-set to implement the TSC-scaling feature of upcoming
AMD CPUs. When this feature is supported the CPU provides a new MSR
which holds a multiplier for the hardware TSC which is applied on the
value rdtsc[p] and reads of MSR 0x10. This feature can be used to
emulate a given tsc frequency for the guest.
Patch 1 is not directly related to this patch-set because it only fixes
a bug which prevented me from testing these patches. In fact it fixes
the same bug Andre sent a patch for. But after the discussion about his
patch he told me to just post my patch and thus here it is.

Thanks,

	Joerg

Diff-stat:

 arch/x86/include/asm/kvm_host.h  |    4 ++
 arch/x86/include/asm/msr-index.h |    1 +
 arch/x86/kvm/svm.c               |   91 +++++++++++++++++++++++++++++++++++++-
 arch/x86/kvm/vmx.c               |   12 +++++
 arch/x86/kvm/x86.c               |   60 ++++++++++++++++++++++---
 include/linux/kvm.h              |    4 ++
 6 files changed, 164 insertions(+), 8 deletions(-)

Shortlog:

Joerg Roedel (6):
      KVM: SVM: Advance instruction pointer in dr_intercept
      KVM: SVM: Implement infrastructure for TSC_RATE_MSR
      KVM: X86: Let kvm-clock report the right tsc frequency
      KVM: SVM: Propagate requested TSC frequency on vcpu init
      KVM: X86: Delegate tsc-offset calculation to architecture code
      KVM: X86: Implement userspace interface to set virtual_tsc_khz


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