Re: [PATCH v3 8/9] KVM: x86: Disable Intel Processor Trace when VMXON in L1 guest

[Paolo Bonzini]

On 27/11/2017 21:24, Luwei Kang wrote:
>  
> +     if (pt_mode == PT_MODE_HOST_GUEST) {
> +             vmx->pt_desc.guest.ctl &= ~RTIT_CTL_TRACEEN;
> +             pt_disable_intercept_for_msr(FALSE);
> +             vmcs_write64(GUEST_IA32_RTIT_CTL, vmx->pt_desc.guest.ctl);
> +     }
> +

Using vmx_set_msr would be nicer.  Alternatively, extract this:

+               pt_disable_intercept_for_msr(data & RTIT_CTL_TRACEEN);
+               vmcs_write64(GUEST_IA32_RTIT_CTL, data);
+               vmx->pt_desc.guest.ctl = data;

into a new function vmx_set_rtit_ctl(vcpu, data), and call it here.

Thanks,

Paolo