On 14/01/2018 19:48, David Woodhouse wrote: > On Fri, 2018-01-12 at 18:00 +0000, Andrew Cooper wrote: >> +.macro IND_THUNK_RETPOLINE reg:req >> + call 2f >> +1: > Linux and GCC have now settled on 'pause;lfence;jmp' here.
And elsewhere. It is probably worth taking, but it takes us to 17 bytes which is frustratingly over one cache line. ~Andrew > >> + lfence >> + jmp 1b >> +2: >> + mov %\reg, (%rsp) >> + ret >> +.endm >> + _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
