perf build: Ensure sysreg-defs Makefile respects output dir

Currently the sysreg-defs are written out to the source tree
unconditionally, ignoring the specified output directory. Correct the
build rule to emit the header to the output directory. Opportunistically
reorganize the rules to avoid interleaving with the set of beauty make
rules.

Reported-by: Ian Rogers <irogers@google.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20231121192956.919380-3-oliver.upton@linux.dev
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Author: oupton

tools/arch/arm64/tools/Makefile

@@ -22,7 +22,7 @@ endif
 arm64_tools_dir = $(top_srcdir)/arch/arm64/tools
 arm64_sysreg_tbl = $(arm64_tools_dir)/sysreg
 arm64_gen_sysreg = $(arm64_tools_dir)/gen-sysreg.awk
-arm64_generated_dir = $(top_srcdir)/tools/arch/arm64/include/generated
+arm64_generated_dir = $(OUTPUT)arch/arm64/include/generated
 arm64_sysreg_defs = $(arm64_generated_dir)/asm/sysreg-defs.h
 
 all: $(arm64_sysreg_defs)

tools/perf/Makefile.perf

@@ -434,6 +434,21 @@ export INSTALL SHELL_PATH
 
 SHELL = $(SHELL_PATH)
 
+arm64_gen_sysreg_dir := $(srctree)/tools/arch/arm64/tools
+ifneq ($(OUTPUT),)
+  arm64_gen_sysreg_outdir := $(OUTPUT)
+else
+  arm64_gen_sysreg_outdir := $(CURDIR)
+endif
+
+arm64-sysreg-defs: FORCE
+	$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir) O=$(arm64_gen_sysreg_outdir)
+
+arm64-sysreg-defs-clean:
+	$(call QUIET_CLEAN,arm64-sysreg-defs)
+	$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir) O=$(arm64_gen_sysreg_outdir) \
+		clean > /dev/null
+
 beauty_linux_dir := $(srctree)/tools/perf/trace/beauty/include/linux/
 linux_uapi_dir := $(srctree)/tools/include/uapi/linux
 asm_generic_uapi_dir := $(srctree)/tools/include/uapi/asm-generic
@@ -450,15 +465,6 @@ drm_ioctl_tbl := $(srctree)/tools/perf/trace/beauty/drm_ioctl.sh
 # Create output directory if not already present
 _dummy := $(shell [ -d '$(beauty_ioctl_outdir)' ] || mkdir -p '$(beauty_ioctl_outdir)')
 
-arm64_gen_sysreg_dir := $(srctree)/tools/arch/arm64/tools
-
-arm64-sysreg-defs: FORCE
-	$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir)
-
-arm64-sysreg-defs-clean:
-	$(call QUIET_CLEAN,arm64-sysreg-defs)
-	$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir) clean > /dev/null
-
 $(drm_ioctl_array): $(drm_hdr_dir)/drm.h $(drm_hdr_dir)/i915_drm.h $(drm_ioctl_tbl)
 	$(Q)$(SHELL) '$(drm_ioctl_tbl)' $(drm_hdr_dir) > $@
 

tools/perf/util/Build

@@ -347,7 +347,7 @@ CFLAGS_rbtree.o        += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ET
 CFLAGS_libstring.o     += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
 CFLAGS_hweight.o       += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
 CFLAGS_header.o        += -include $(OUTPUT)PERF-VERSION-FILE
-CFLAGS_arm-spe.o       += -I$(srctree)/tools/arch/arm64/include/ -I$(srctree)/tools/arch/arm64/include/generated/
+CFLAGS_arm-spe.o       += -I$(srctree)/tools/arch/arm64/include/ -I$(OUTPUT)arch/arm64/include/generated/
 
 $(OUTPUT)util/argv_split.o: ../lib/argv_split.c FORCE
 	$(call rule_mkdir)

tools/testing/selftests/kvm/Makefile

@@ -18,12 +18,13 @@ else
 endif
 
 ifeq ($(ARCH),arm64)
-arm64_tools_dir := $(top_srcdir)/tools/arch/arm64/tools/
+tools_dir := $(top_srcdir)/tools
+arm64_tools_dir := $(tools_dir)/arch/arm64/tools/
 GEN_HDRS := $(top_srcdir)/tools/arch/arm64/include/generated/
 CFLAGS += -I$(GEN_HDRS)
 
 $(GEN_HDRS): $(wildcard $(arm64_tools_dir)/*)
-	$(MAKE) -C $(arm64_tools_dir)
+	$(MAKE) -C $(arm64_tools_dir) O=$(tools_dir)
 endif
 
 LIBKVM += lib/assert.c