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    Subject[PATCH v8 14/14] KVM/x86: remove the common handling of the debugctl msr
    Date
    The debugctl msr is not completely identical on AMD and Intel CPUs, for
    example, FREEZE_LBRS_ON_PMI is supported by Intel CPUs only. Now, this
    msr is handled separatedly in svm.c and intel_pmu.c. So remove the
    common debugctl msr handling code in kvm_get/set_msr_common.

    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Signed-off-by: Wei Wang <wei.w.wang@intel.com>
    ---
    arch/x86/kvm/x86.c | 13 -------------
    1 file changed, 13 deletions(-)

    diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
    index efaf0e8..3839ebd 100644
    --- a/arch/x86/kvm/x86.c
    +++ b/arch/x86/kvm/x86.c
    @@ -2528,18 +2528,6 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
    return 1;
    }
    break;
    - case MSR_IA32_DEBUGCTLMSR:
    - if (!data) {
    - /* We support the non-activated case already */
    - break;
    - } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
    - /* Values other than LBR and BTF are vendor-specific,
    - thus reserved and should throw a #GP */
    - return 1;
    - }
    - vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
    - __func__, data);
    - break;
    case 0x200 ... 0x2ff:
    return kvm_mtrr_set_msr(vcpu, msr, data);
    case MSR_IA32_APICBASE:
    @@ -2800,7 +2788,6 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
    switch (msr_info->index) {
    case MSR_IA32_PLATFORM_ID:
    case MSR_IA32_EBL_CR_POWERON:
    - case MSR_IA32_DEBUGCTLMSR:
    case MSR_IA32_LASTBRANCHFROMIP:
    case MSR_IA32_LASTBRANCHTOIP:
    case MSR_IA32_LASTINTFROMIP:
    --
    2.7.4
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