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SubjectRe: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support
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On 7/30/2021 12:05 AM, Dave Hansen wrote:
> On 7/29/21 8:02 AM, Tianyu Lan wrote:
>>>
>>
>> There is x86_hyper_type to identify hypervisor type and we may check
>> this variable after checking X86_FEATURE_HYPERVISOR.
>>
>> static inline bool hv_is_isolation_supported(void)
>> {
>>     if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR))
>>         return 0;
>>
>>         if (x86_hyper_type != X86_HYPER_MS_HYPERV)
>>                 return 0;
>>
>>     // out of line function call:
>>     return __hv_is_isolation_supported();
>> }
>
> Looks fine. You just might want to use this existing helper:
>
> static inline bool hypervisor_is_type(enum x86_hypervisor_type type)
> {
> return x86_hyper_type == type;
> }
>

Yes,thanks for suggestion and will update in the next version.

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