Anton Blanchard cc1adb5f32 powerpc/pseries: Use jump labels for hcall tracepoints ... hcall tracepoints add quite a few instructions to our hcall path: plpar_hcall: mr r2,r2 mfcr r0 stw r0,8(r1) b 164 <---- start ld r12,0(r2) std r12,32(r1) cmpdi r12,0 beq 164 <---- end ... We have an unconditional branch that gets noped out during boot and a load/compare/branch. We also store the tracepoint value to the stack for the hcall_exit path to use. By using jump labels we can simplify this to just a single nop that gets replaced with a branch when the tracepoint is enabled: plpar_hcall: mr r2,r2 mfcr r0 stw r0,8(r1) nop <---- ... If jump labels are not enabled, we fall back to the old method. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>		2014-07-11 16:05:58 +10:00
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asm	powerpc/pseries: Use jump labels for hcall tracepoints	2014-07-11 16:05:58 +10:00
uapi/asm	powerpc: Add AT_HWCAP2 to indicate V.CRYPTO category support	2014-06-11 16:31:20 +10:00