On Fri, Feb 19, 2021 at 03:55:30PM -0600, Josh Poimboeuf wrote: > On Fri, Feb 19, 2021 at 09:43:06PM +0100, Peter Zijlstra wrote: > > Arguably it would be simpler to do the other way around, but > > unfortunately alternatives don't work that way, we cannot say: > > > > ALTERNATIVE "call __x86_indirect_thunk_\reg", > > "call *%reg", ~X86_FEATURE_RETPOLINE > > > > That is, there is no negative form of alternatives. > > X86_FEATURE_NO_RETPOLINE?
We could, but it so happens Joerg is also wanting negative features. So I was thikning that perhaps we can convince Boris they're not really all that aweful after all :-)
