On 23/10/2015 11:15, Jian Zhou wrote:
> data *msr_info)
> }
> 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 */
> + supported = DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF |
> + DEBUGCTLMSR_FREEZE_LBRS_ON_PMI;
> +
> + if (data & ~supported) {
> + /*
> + * Values other than LBR/BTF/FREEZE_LBRS_ON_PMI
> + * are not supported, thus reserved and should throw a #GP
> + */
> + vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
> + __func__, data);
> return 1;
> }
> - vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
> - __func__, data);
> + if (kvm_x86_ops->set_debugctlmsr) {
> + if (kvm_x86_ops->set_debugctlmsr(vcpu, data))
> + return 1;
> + }
> + else
> + return 1;
> +
> break;
> case 0x200 ... 0x2ff:
> return kvm_mtrr_set_msr(vcpu, msr, data);
> @@ -2078,6 +2090,33 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
> vcpu_unimpl(vcpu, "disabled perfctr wrmsr: "
> "0x%x data 0x%llx\n", msr, data);
> break;
> + case MSR_LBR_STATUS:
> + if (kvm_x86_ops->set_debugctlmsr) {
> + vcpu->arch.lbr_status = (data == 0) ? 0 : 1;
> + if (data)
> + kvm_x86_ops->set_debugctlmsr(vcpu,
> + DEBUGCTLMSR_LBR | DEBUGCTLMSR_FREEZE_LBRS_ON_PMI);
> + } else
> + vcpu_unimpl(vcpu, "lbr is disabled, ignored wrmsr: "
> + "0x%x data 0x%llx\n", msr, data);
> + break;
> + case MSR_LBR_SELECT:
> + case MSR_LBR_TOS:
> + case MSR_PENTIUM4_LER_FROM_LIP:
> + case MSR_PENTIUM4_LER_TO_LIP:
> + case MSR_PENTIUM4_LBR_TOS:
> + case MSR_IA32_LASTINTFROMIP:
> + case MSR_IA32_LASTINTTOIP:
> + case MSR_LBR_CORE2_FROM ... MSR_LBR_CORE2_FROM + 0x7:
> + case MSR_LBR_CORE2_TO ... MSR_LBR_CORE2_TO + 0x7:
> + case MSR_LBR_NHM_FROM ... MSR_LBR_NHM_FROM + 0x1f:
> + case MSR_LBR_NHM_TO ... MSR_LBR_NHM_TO + 0x1f:
> + if (kvm_x86_ops->set_lbr_msr)
> + kvm_x86_ops->set_lbr_msr(vcpu, msr, data);
> + else
> + vcpu_unimpl(vcpu, "lbr is disabled, ignored wrmsr: "
> + "0x%x data 0x%llx\n", msr, data);
I think you can just do this in kvm_x86_ops->set_msr. The old
implementation for DEBUGCTL MSR can be moved to svm.c.
Paolo
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