Commit 8b975197 authored by Carsten Haitzler's avatar Carsten Haitzler Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Add asm pureloop test tool 



Add test tool to be driven by further test scripts. This tool is pure
arm64 ASM with no libc usage to ensure it is the same exact binary/code
every time so it can also be re-used for many uses. It just loops for a
given fixed number of loops.

Reviewed-by: default avatarJames Clark <james.clark@arm.com>
Signed-off-by: default avatarCarsten Haitzler <carsten.haitzler@arm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: coresight@lists.linaro.org
Link: https://lore.kernel.org/r/20220909152803.2317006-4-carsten.haitzler@foss.arm.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 34bec35c

tools/perf/tests/shell/coresight/Makefile

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@@ -4,7 +4,8 @@ include ../../../../../tools/scripts/Makefile.include 
include ../../../../../tools/scripts/Makefile.arch

include ../../../../../tools/scripts/utilities.mak



SUBDIRS =

SUBDIRS = \

	asm_pure_loop



all: $(SUBDIRS)

$(SUBDIRS):

tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore

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asm_pure_loop

tools/perf/tests/shell/coresight/asm_pure_loop/Makefile

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# SPDX-License-Identifier: GPL-2.0

# Carsten Haitzler <carsten.haitzler@arm.com>, 2021



include ../Makefile.miniconfig



# Binary to produce

BIN=asm_pure_loop

# Any linking/libraries needed for the binary - empty if none needed

LIB=



all: $(BIN)



$(BIN): $(BIN).S

ifdef CORESIGHT

ifeq ($(ARCH),arm64)

# Build line - this is raw asm with no libc to have an always exact binary

	$(Q)$(CC) $(BIN).S -nostdlib -static -o $(BIN) $(LIB)

endif

endif



install-tests: all

ifdef CORESIGHT

ifeq ($(ARCH),arm64)

# Install the test tool in the right place

	$(call QUIET_INSTALL, tests) \

		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)'; \

		$(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)/$(BIN)'

endif

endif



clean:

	$(Q)$(RM) -f $(BIN)



.PHONY: all clean install-tests

tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S

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/* SPDX-License-Identifier: GPL-2.0 */

/* Tamas Zsoldos <tamas.zsoldos@arm.com>, 2021 */



.globl _start

_start:

	mov	x0, 0x0000ffff

	mov	x1, xzr

loop:

	nop

	nop

	cbnz	x1, noskip

	nop

	nop

	adrp	x2, skip

	add 	x2, x2, :lo12:skip

	br	x2

	nop

	nop

noskip:

	nop

	nop

skip:

	sub	x0, x0, 1

	cbnz	x0, loop



	mov	x0, #0

	mov	x8, #93 // __NR_exit syscall

	svc	#0