OpenCloudOS-Kernel/arch/powerpc
Anton Blanchard a75c380c71 powerpc: Enable DCACHE_WORD_ACCESS on ppc64le
Enable on DCACHE_WORD_ACCESS on ppc64le. It should work on
ppc64 and ppc32 but we need to do some testing first.

A somewhat reasonable testcase used to show the performance
improvement - a repeated stat of a 33 byte filename that
doesn't exist:

 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>

 #define ITERATIONS 10000000

 #define PATH "123456781234567812345678123456781"

 int main(void)
 {
 	unsigned long i;
 	struct stat buf;

 	for (i = 0; i < ITERATIONS; i++)
 		stat(PATH, &buf);

 	return 0;
 }

runs 27% faster on POWER8.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-30 14:59:13 +10:00
..
boot powerpc/boot: Don't install zImage.* from make install 2014-09-25 23:14:34 +10:00
configs powerpc: Make CONFIG_FHANDLE=y for all 64 bit powerpc defconfigs 2014-09-09 19:02:46 +10:00
crypto powerpc: Fix compile of sha1-powerpc-asm.S on 32-bit 2013-03-05 16:56:26 +11:00
include powerpc: ppc64le optimised word at a time 2014-09-30 14:59:13 +10:00
kernel powerpc/eeh: Fix kernel crash when passing through VF 2014-09-25 23:14:56 +10:00
kvm powerpc/kvm/cma: Fix panic introduces by signed shift operation 2014-09-03 10:34:07 +02:00
lib powerpc: Implement emulation of string loads and stores 2014-09-25 23:14:52 +10:00
math-emu powerpc: Correct emulated mtfsf instruction 2014-04-07 10:33:11 +10:00
mm powerpc/mm: Unindent htab_dt_scan_page_sizes() 2014-09-25 23:14:56 +10:00
net net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
oprofile powerpc: Ensure global functions include their prototype 2014-09-25 23:14:42 +10:00
perf powerpc: Make a bunch of things static 2014-09-25 23:14:41 +10:00
platforms powerpc: pci-ioda: Use a single function to emit logging messages 2014-09-25 23:14:57 +10:00
sysdev powerpc/powernv: Don't call generic code on offline cpus 2014-09-25 23:14:50 +10:00
xmon powerpc: Hard disable interrupts in xmon 2014-08-13 15:13:48 +10:00
Kconfig powerpc: Enable DCACHE_WORD_ACCESS on ppc64le 2014-09-30 14:59:13 +10:00
Kconfig.debug Patch queue for ppc - 2014-08-01 2014-08-05 09:58:11 +02:00
Makefile powerpc: Add POWER8 CPU selection 2014-09-25 23:14:49 +10:00
relocs_check.pl Fix warning typo "CONFIG_RELCOATABLE" 2013-05-29 15:11:30 +02:00