Re: [Xen-devel] [PATCH v2 07/20] arm/x86: Add ALTERNATIVE and HAS_EX_TABLE

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 25/08/16 15:02, Julien Grall wrote:
> Hi Andrew,
>
> On 25/08/2016 09:58, Andrew Cooper wrote:
> > On 25/08/16 14:37, Konrad Rzeszutek Wilk wrote:
> >
> > > x86 implements all of them by default - and we just
> > > add two extra CONFIG_ variables to be declared in autoconf.h.
> > >
> > > ARM 64 only has alternative while ARM 32 has none of them.
> > >
> > > And while at it change the livepatch common code that
> > > would benefit from this.
> > >
> > > Suggested-by: Julien Grall <julien.grall@xxxxxxx>
> > > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > Surely livepatch should select alternatives ?
> Do you mean for ARM? If so, alternatives is not supported by ARM32 so 
> it should not be selected.
Perhaps we need a "selects ALTERNATIVES if X86" then, but the x86 
implementation of livepatching does strictly need alternatives support, 
and should be represented appropriately.
~Andrew

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