Nicholas Piggin bdcb1aefc5 powerpc/64s: Improve RFI L1-D cache flush fallback ... The fallback RFI flush is used when firmware does not provide a way to flush the cache. It's a "displacement flush" that evicts useful data by displacing it with an uninteresting buffer. The flush has to take care to work with implementation specific cache replacment policies, so the recipe has been in flux. The initial slow but conservative approach is to touch all lines of a congruence class, with dependencies between each load. It has since been determined that a linear pattern of loads without dependencies is sufficient, and is significantly faster. Measuring the speed of a null syscall with RFI fallback flush enabled gives the relative improvement: P8 - 1.83x P9 - 1.75x The flush also becomes simpler and more adaptable to different cache geometries. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-01-23 16:16:33 +11:00
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ansidecl.h
dis-asm.h
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
nonstdio.c
nonstdio.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ppc-dis.c	powerpc/xmon: Do not compute/store the major opcode	2018-01-21 23:37:43 +11:00
ppc-opc.c	powerpc updates for 4.11 part 2	2017-03-01 10:10:16 -08:00
ppc.h
spr_access.S	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
spu-dis.c
spu-insns.h
spu-opc.c
spu.h
xmon.c	powerpc/64s: Improve RFI L1-D cache flush fallback	2018-01-23 16:16:33 +11:00