Re: [PATCH 03/13] x86/HV: Add new hvcall guest address host visibility support

[Tianyu Lan]

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.