From ef1313deafb7baa6d3382044e962d5ad5e8c8dd6 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Mon, 14 Oct 2013 21:03:58 +1100 Subject: powerpc: Add VMX optimised xor for RAID5 Add a VMX optimised xor, used primarily for RAID5. On a POWER7 blade this is a decent win: 32regs : 17932.800 MB/sec altivec : 19724.800 MB/sec The bigger gain is when the same test is run in SMT4 mode, as it would if there was a lot of work going on: 8regs : 8377.600 MB/sec altivec : 15801.600 MB/sec I tested this against an array created without the patch, and also verified it worked as expected on a little endian kernel. [ Fix !CONFIG_ALTIVEC build -- BenH ] Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/lib/Makefile | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/powerpc/lib/Makefile') diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index 5310132856c..95a20e17dbf 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -39,3 +39,6 @@ obj-$(CONFIG_PPC_LIB_RHEAP) += rheap.o obj-y += code-patching.o obj-y += feature-fixups.o obj-$(CONFIG_FTR_FIXUP_SELFTEST) += feature-fixups-test.o + +obj-$(CONFIG_ALTIVEC) += xor_vmx.o +CFLAGS_xor_vmx.o += -maltivec -mabi=altivec -- cgit v1.2.3-70-g09d2