Whenever an MSR is part of KVM_GET_MSR_INDEX_LIST, it has to be always
settable with KVM_SET_MSR.  Right now MSR_IA32_DS_AREA, MSR_ARCH_LBR_DEPTH
and MSR_ARCH_LBR_CTL are not fulfilling this, resulting in selftests
failures on <=Skylake processors.

Fix this, and in general allow host-initiated writes of a default
value for all PMU MSRs

Paolo Bonzini (2):
  KVM: vmx, pmu: accept 0 for absent MSRs when host-initiated
  KVM: x86: always allow host-initiated writes to PMU MSRs

 arch/x86/kvm/pmu.c           |  4 ++--
 arch/x86/kvm/pmu.h           |  4 ++--
 arch/x86/kvm/svm/pmu.c       |  2 +-
 arch/x86/kvm/vmx/pmu_intel.c | 42 +++++++++++++++++++++++++-----------
 arch/x86/kvm/x86.c           | 10 ++++-----
 5 files changed, 39 insertions(+), 23 deletions(-)

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2.31.1