Re: [PATCH 15/17] KVM: retpolines: x86: eliminate retpoline from vmx.c exit handlers

[Paolo Bonzini]

On 23/09/19 22:23, Sean Christopherson wrote:
>  
> +int nested_vmx_handle_vmx_instruction(struct kvm_vcpu *vcpu)
> +{
> +	switch (to_vmx(vcpu)->exit_reason) {
> +	case EXIT_REASON_VMCLEAR:
> +		return handle_vmclear(vcpu);
> +	case EXIT_REASON_VMLAUNCH:
> +		return handle_vmlaunch(vcpu);
> +	case EXIT_REASON_VMPTRLD:
> +		return handle_vmptrld(vcpu);
> +	case EXIT_REASON_VMPTRST:
> +		return handle_vmptrst(vcpu);
> +	case EXIT_REASON_VMREAD:
> +		return handle_vmread(vcpu);
> +	case EXIT_REASON_VMRESUME:
> +		return handle_vmresume(vcpu);
> +	case EXIT_REASON_VMWRITE:
> +		return handle_vmwrite(vcpu);
> +	case EXIT_REASON_VMOFF:
> +		return handle_vmoff(vcpu);
> +	case EXIT_REASON_VMON:
> +		return handle_vmon(vcpu);
> +	case EXIT_REASON_INVEPT:
> +		return handle_invept(vcpu);
> +	case EXIT_REASON_INVVPID:
> +		return handle_invvpid(vcpu);
> +	case EXIT_REASON_VMFUNC:
> +		return handle_vmfunc(vcpu);
> +	}
> +

Do you really need that?  Why couldn't the handle_* functions simply be
exported from nested.c to vmx.c?

Paolo