Re: [PATCH v3 4/6] KVM: x86: Add support for RDMSR/WRMSRNS w/ immediate on Intel

[Xiaoyao Li <xiaoyao.li@xxxxxxxxx>]

On 8/6/2025 4:22 AM, Sean Christopherson wrote:
> +static int handle_rdmsr_imm(struct kvm_vcpu *vcpu)
> +{
> +	return kvm_emulate_rdmsr_imm(vcpu, vmx_get_exit_qual(vcpu),
> +				     vmx_get_msr_imm_reg(vcpu));
> +}
> +
> +static int handle_wrmsr_imm(struct kvm_vcpu *vcpu)
> +{
> +	return kvm_emulate_wrmsr_imm(vcpu, vmx_get_exit_qual(vcpu),
> +				     vmx_get_msr_imm_reg(vcpu));
> +}

We need to inject #UD for !guest_cpu_has(X86_FEATURE_MSR_IMM)