perf util: Make util its own library

Make the util directory into its own library. This is done to avoid
compiling code twice, once for the perf tool and once for the perf
python module. For convenience:
  arch/common.c
  scripts/perl/Perf-Trace-Util/Context.c
  scripts/python/Perf-Trace-Util/Context.c
are made part of this library.
Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: James Clark <james.clark@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Gary Guo <gary@garyguo.net>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Wedson Almeida Filho <wedsonaf@gmail.com>
Cc: Ze Gao <zegao2021@gmail.com>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Andrei Vagin <avagin@google.com>
Cc: Yicong Yang <yangyicong@hisilicon.com>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Guo Ren <guoren@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Benno Lossin <benno.lossin@proton.me>
Cc: Björn Roy Baron <bjorn3_gh@protonmail.com>
Cc: Andreas Hindborg <a.hindborg@samsung.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240625214117.953777-7-irogers@google.com

tools/perf/Build

@@ -53,11 +53,12 @@ CFLAGS_builtin-trace.o	   += -DSTRACE_GROUPS_DIR="BUILD_STR($(STRACE_GROUPS_DIR_
 CFLAGS_builtin-report.o	   += -DTIPDIR="BUILD_STR($(tipdir_SQ))"
 CFLAGS_builtin-report.o	   += -DDOCDIR="BUILD_STR($(srcdir_SQ)/Documentation)"
 
-perf-y += util/
+perf-util-y += util/
+perf-util-y += arch/
 perf-y += arch/
 perf-test-y += arch/
 perf-ui-y += ui/
-perf-y += scripts/
+perf-util-y += scripts/
 
 gtk-y += ui/gtk/
 

tools/perf/Makefile.perf

@@ -434,6 +434,9 @@ LIBPERF_TEST := $(OUTPUT)libperf-test.a
 LIBPERF_UI_IN := $(OUTPUT)perf-ui-in.o
 LIBPERF_UI := $(OUTPUT)libperf-ui.a
 
+LIBPERF_UTIL_IN := $(OUTPUT)perf-util-in.o
+LIBPERF_UTIL := $(OUTPUT)libperf-util.a
+
 LIBPMU_EVENTS_IN := $(OUTPUT)pmu-events/pmu-events-in.o
 LIBPMU_EVENTS := $(OUTPUT)libpmu-events.a
 
@@ -441,7 +444,8 @@ PERFLIBS = $(LIBAPI) $(LIBPERF) $(LIBSUBCMD) $(LIBSYMBOL)
 ifdef LIBBPF_STATIC
   PERFLIBS += $(LIBBPF)
 endif
-PERFLIBS += $(LIBPERF_BENCH) $(LIBPERF_TEST) $(LIBPERF_UI) $(LIBPMU_EVENTS)
+PERFLIBS += $(LIBPERF_BENCH) $(LIBPERF_TEST) $(LIBPERF_UI) $(LIBPERF_UTIL)
+PERFLIBS += $(LIBPMU_EVENTS)
 
 # We choose to avoid "if .. else if .. else .. endif endif"
 # because maintaining the nesting to match is a pain.  If
@@ -761,6 +765,12 @@ $(LIBPERF_UI_IN): FORCE prepare
 $(LIBPERF_UI): $(LIBPERF_UI_IN)
 	$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $<
 
+$(LIBPERF_UTIL_IN): FORCE prepare
+	$(Q)$(MAKE) $(build)=perf-util
+
+$(LIBPERF_UTIL): $(LIBPERF_UTIL_IN)
+	$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $<
+
 $(OUTPUT)perf: $(PERFLIBS) $(PERF_IN)
 	$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) \
 		$(PERF_IN) $(LIBS) -o $@

tools/perf/arch/Build

-perf-y += common.o
-perf-y += $(SRCARCH)/
+perf-util-y += common.o
 perf-test-y += $(SRCARCH)/
+perf-util-y += $(SRCARCH)/

tools/perf/arch/arm/Build

-perf-y += util/
+perf-util-y += util/
 perf-test-$(CONFIG_DWARF_UNWIND) += tests/

tools/perf/arch/arm/util/Build

-perf-y += perf_regs.o
+perf-util-y += perf_regs.o
 
-perf-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o
 
-perf-$(CONFIG_LOCAL_LIBUNWIND)    += unwind-libunwind.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_LOCAL_LIBUNWIND)    += unwind-libunwind.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
 
-perf-$(CONFIG_AUXTRACE) += pmu.o auxtrace.o cs-etm.o
+perf-util-$(CONFIG_AUXTRACE) += pmu.o auxtrace.o cs-etm.o

tools/perf/arch/arm64/Build

-perf-y += util/
+perf-util-y += util/
 perf-test-y += tests/

tools/perf/arch/arm64/util/Build

-perf-y += header.o
-perf-y += machine.o
-perf-y += perf_regs.o
-perf-y += tsc.o
-perf-y += pmu.o
-perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
-perf-$(CONFIG_DWARF)     += dwarf-regs.o
-perf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-y += header.o
+perf-util-y += machine.o
+perf-util-y += perf_regs.o
+perf-util-y += tsc.o
+perf-util-y += pmu.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
+perf-util-$(CONFIG_DWARF)     += dwarf-regs.o
+perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
 
-perf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \
+perf-util-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \
 			      ../../arm/util/auxtrace.o \
 			      ../../arm/util/cs-etm.o \
 			      arm-spe.o mem-events.o hisi-ptt.o

tools/perf/arch/csky/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/arch/csky/util/Build

-perf-y += perf_regs.o
+perf-util-y += perf_regs.o
 
-perf-$(CONFIG_DWARF) += dwarf-regs.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o

tools/perf/arch/loongarch/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/arch/loongarch/util/Build

-perf-y += perf_regs.o
+perf-util-y += perf_regs.o
 
-perf-$(CONFIG_DWARF)     += dwarf-regs.o
-perf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_DWARF)     += dwarf-regs.o
+perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o

tools/perf/arch/mips/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/arch/mips/util/Build

-perf-y += perf_regs.o
-perf-$(CONFIG_DWARF) += dwarf-regs.o
-perf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
+perf-util-y += perf_regs.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o

tools/perf/arch/powerpc/Build

-perf-y += util/
+perf-util-y += util/
 perf-test-y += tests/

tools/perf/arch/powerpc/util/Build

-perf-y += header.o
-perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
-perf-y += perf_regs.o
-perf-y += mem-events.o
-perf-y += pmu.o
-perf-y += sym-handling.o
-perf-y += evsel.o
-perf-y += event.o
+perf-util-y += header.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
+perf-util-y += perf_regs.o
+perf-util-y += mem-events.o
+perf-util-y += pmu.o
+perf-util-y += sym-handling.o
+perf-util-y += evsel.o
+perf-util-y += event.o
 
-perf-$(CONFIG_DWARF) += dwarf-regs.o
-perf-$(CONFIG_DWARF) += skip-callchain-idx.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_DWARF) += skip-callchain-idx.o
 
-perf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o

tools/perf/arch/riscv/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/arch/riscv/util/Build

-perf-y += perf_regs.o
-perf-y += header.o
+perf-util-y += perf_regs.o
+perf-util-y += header.o
 
-perf-$(CONFIG_DWARF) += dwarf-regs.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o

tools/perf/arch/s390/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/arch/s390/util/Build

-perf-y += header.o
-perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
-perf-y += perf_regs.o
+perf-util-y += header.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
+perf-util-y += perf_regs.o
 
-perf-$(CONFIG_DWARF) += dwarf-regs.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
 
-perf-y += machine.o
-perf-y += pmu.o
+perf-util-y += machine.o
+perf-util-y += pmu.o
 
-perf-$(CONFIG_AUXTRACE) += auxtrace.o
+perf-util-$(CONFIG_AUXTRACE) += auxtrace.o

tools/perf/arch/sh/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/arch/sh/util/Build

-perf-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o

tools/perf/arch/sparc/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/arch/sparc/util/Build

-perf-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o

tools/perf/arch/x86/Build

-perf-y += util/
+perf-util-y += util/
 perf-test-y += tests/
 
 ifdef SHELLCHECK

tools/perf/arch/x86/util/Build

-perf-y += header.o
-perf-y += tsc.o
-perf-y += pmu.o
-perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
-perf-y += perf_regs.o
-perf-y += topdown.o
-perf-y += machine.o
-perf-y += event.o
-perf-y += evlist.o
-perf-y += mem-events.o
-perf-y += evsel.o
-perf-y += iostat.o
-perf-y += env.o
+perf-util-y += header.o
+perf-util-y += tsc.o
+perf-util-y += pmu.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
+perf-util-y += perf_regs.o
+perf-util-y += topdown.o
+perf-util-y += machine.o
+perf-util-y += event.o
+perf-util-y += evlist.o
+perf-util-y += mem-events.o
+perf-util-y += evsel.o
+perf-util-y += iostat.o
+perf-util-y += env.o
 
-perf-$(CONFIG_DWARF) += dwarf-regs.o
-perf-$(CONFIG_BPF_PROLOGUE) += dwarf-regs.o
+perf-util-$(CONFIG_DWARF) += dwarf-regs.o
+perf-util-$(CONFIG_BPF_PROLOGUE) += dwarf-regs.o
 
-perf-$(CONFIG_LOCAL_LIBUNWIND)    += unwind-libunwind.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_LOCAL_LIBUNWIND)    += unwind-libunwind.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
 
-perf-$(CONFIG_AUXTRACE) += auxtrace.o
-perf-$(CONFIG_AUXTRACE) += archinsn.o
-perf-$(CONFIG_AUXTRACE) += intel-pt.o
-perf-$(CONFIG_AUXTRACE) += intel-bts.o
+perf-util-$(CONFIG_AUXTRACE) += auxtrace.o
+perf-util-$(CONFIG_AUXTRACE) += archinsn.o
+perf-util-$(CONFIG_AUXTRACE) += intel-pt.o
+perf-util-$(CONFIG_AUXTRACE) += intel-bts.o

tools/perf/arch/xtensa/Build

-perf-y += util/
+perf-util-y += util/

tools/perf/scripts/Build

 ifeq ($(CONFIG_LIBTRACEEVENT),y)
-  perf-$(CONFIG_LIBPERL)   += perl/Perf-Trace-Util/
+  perf-util-$(CONFIG_LIBPERL)   += perl/Perf-Trace-Util/
 endif
-perf-$(CONFIG_LIBPYTHON) += python/Perf-Trace-Util/
+perf-util-$(CONFIG_LIBPYTHON) += python/Perf-Trace-Util/

tools/perf/scripts/perl/Perf-Trace-Util/Build

-perf-y += Context.o
+perf-util-y += Context.o
 
 CFLAGS_Context.o += $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-bad-function-cast -Wno-declaration-after-statement -Wno-switch-enum
 CFLAGS_Context.o += -Wno-unused-parameter -Wno-nested-externs -Wno-undef

tools/perf/scripts/python/Perf-Trace-Util/Build

-perf-y += Context.o
+perf-util-y += Context.o
 
 # -Wno-declaration-after-statement: The python headers have mixed code with declarations (decls after asserts, for instance)
 CFLAGS_Context.o += $(PYTHON_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-nested-externs -Wno-declaration-after-statement

tools/perf/util/arm-spe-decoder/Build

-perf-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o arm-spe-decoder.o
+perf-util-$(CONFIG_AUXTRACE) += arm-spe-pkt-decoder.o arm-spe-decoder.o

tools/perf/util/cs-etm-decoder/Build

-perf-$(CONFIG_AUXTRACE) += cs-etm-decoder.o
+perf-util-$(CONFIG_AUXTRACE) += cs-etm-decoder.o

tools/perf/util/hisi-ptt-decoder/Build

-perf-$(CONFIG_AUXTRACE) += hisi-ptt-pkt-decoder.o
+perf-util-$(CONFIG_AUXTRACE) += hisi-ptt-pkt-decoder.o

tools/perf/util/intel-pt-decoder/Build

-perf-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o intel-pt-insn-decoder.o intel-pt-log.o intel-pt-decoder.o
+perf-util-$(CONFIG_AUXTRACE) += intel-pt-pkt-decoder.o intel-pt-insn-decoder.o intel-pt-log.o intel-pt-decoder.o
 
 inat_tables_script = $(srctree)/tools/arch/x86/tools/gen-insn-attr-x86.awk
 inat_tables_maps = $(srctree)/tools/arch/x86/lib/x86-opcode-map.txt

tools/perf/util/perf-regs-arch/Build

-perf-y += perf_regs_aarch64.o
-perf-y += perf_regs_arm.o
-perf-y += perf_regs_csky.o
-perf-y += perf_regs_loongarch.o
-perf-y += perf_regs_mips.o
-perf-y += perf_regs_powerpc.o
-perf-y += perf_regs_riscv.o
-perf-y += perf_regs_s390.o
-perf-y += perf_regs_x86.o
+perf-util-y += perf_regs_aarch64.o
+perf-util-y += perf_regs_arm.o
+perf-util-y += perf_regs_csky.o
+perf-util-y += perf_regs_loongarch.o
+perf-util-y += perf_regs_mips.o
+perf-util-y += perf_regs_powerpc.o
+perf-util-y += perf_regs_riscv.o
+perf-util-y += perf_regs_s390.o
+perf-util-y += perf_regs_x86.o

tools/perf/util/scripting-engines/Build

 ifeq ($(CONFIG_LIBTRACEEVENT),y)
-  perf-$(CONFIG_LIBPERL)   += trace-event-perl.o
+  perf-util-$(CONFIG_LIBPERL)   += trace-event-perl.o
 endif
-perf-$(CONFIG_LIBPYTHON) += trace-event-python.o
+perf-util-$(CONFIG_LIBPYTHON) += trace-event-python.o
 
 CFLAGS_trace-event-perl.o += $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow -Wno-nested-externs -Wno-undef -Wno-switch-default -Wno-bad-function-cast -Wno-declaration-after-statement -Wno-switch-enum