Re: [PATCH v6 05/12] x86/alternative: support ALTERNATIVE_TERNARY

[Jürgen Groß <jgross@xxxxxxxx>]

On 10.03.21 15:27, Borislav Petkov wrote:
> On Tue, Mar 09, 2021 at 02:48:06PM +0100, Juergen Gross wrote:
> > diff --git a/arch/x86/include/asm/alternative.h 
> > b/arch/x86/include/asm/alternative.h
> > index 89889618ae01..4fb844e29d26 100644
> > --- a/arch/x86/include/asm/alternative.h
> > +++ b/arch/x86/include/asm/alternative.h
> > @@ -178,6 +178,9 @@ static inline int alternatives_text_reserved(void *start, 
> > void *end)
> >         ALTINSTR_REPLACEMENT(newinstr2, 2)                              \
> >         ".popsection\n"
> >   
> > +#define ALTERNATIVE_TERNARY(oldinstr, feature, newinstr1, newinstr2)	\
> > +       ALTERNATIVE_2(oldinstr, newinstr2, X86_FEATURE_ALWAYS, newinstr1, 
> > feature)
> Make that:
>
> /*
>   * If @feature is set, patch @newinstr_yes, else @newinstr_no
>   */
> #define ALTERNATIVE_TERNARY(oldinstr, feature, newinstr_yes, newinstr_no) \
>          ALTERNATIVE_2(oldinstr, newinstr_no, X86_FEATURE_ALWAYS, newinstr_yes, 
> feature)
>
> and in alternative-asm.h too pls.
Okay.

> Regardless, this looks nice! :)
Thanks,


Juergen

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