# Re: \[PATCH V3 01/13\] x86/HV: Initialize GHCB page in Isolation VM

- From: Tianyu Lan \<hidden\>
- Date: 2021-08-10 12:18:00 
- List: linux-arch
- Page: https://ratatoskr.run/linux-arch/2021/08/1473039
- Thread: https://ratatoskr.run/xen-devel/2021/08/1472230/t.md

```text
Hi Wei:
      Thanks for review.

On 8/10/2021 6:56 PM, Wei Liu wrote:
> On Mon, Aug 09, 2021 at 01:56:05PM -0400, Tianyu Lan wrote:
> [...]
>>   static int hv_cpu_init(unsigned int cpu)
>>   {
>>   	union hv_vp_assist_msr_contents msr = { 0 };
>> @@ -85,6 +111,8 @@ static int hv_cpu_init(unsigned int cpu)
>>   		}
>>   	}
>>   
>> +	hyperv_init_ghcb();
>> +
>
> Why is the return value not checked here? If that's not required, can
> you leave a comment?
>

The check is necessary here. Will update in the next version.

Thanks.
```