Re: [RFC PATCH V3 10/16] x86/hyperv: Add smp support for sev-snp guest

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On Fri, Feb 03, 2023 at 03:00:44PM +0800, Tianyu Lan wrote:
> > For the bits definition, use:
> > 
> >              u64 sev_feature_snp            : 1,
> >                  sev_feature_vtom            : 1,
> >                  sev_feature_reflectvc        : 1,
> >                  ...
> > 
> 
> Good suggestion. Thanks.

Actually, I'd prefer if you used a named union and drop all this
"sev_feature_" prefixes everywhere:

        union {
                struct {
                        u64 snp                     : 1;
                        u64 vtom                    : 1;
                        u64 reflectvc               : 1;
                        u64 restrict_injection      : 1;
                        u64 alternate_injection     : 1;
                        u64 full_debug              : 1;
                        u64 reserved1               : 1;
                        u64 snpbtb_isolation        : 1;
                        u64 resrved2                : 56;
                };
                u64 val;
        } sev_features;



so that you can do in code:

	struct sev_es_save_area *sev;

	...

	sev->sev_features.snp = ...

and so on.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette



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