perf build: Cleanup perf register configuration

The target is to allow the tool to always enable the perf register
feature for native parsing and cross parsing, and current code doesn't
depend on the macro 'HAVE_PERF_REGS_SUPPORT'.

This patch remove the variable 'NO_PERF_REGS' and the defined macro
'HAVE_PERF_REGS_SUPPORT' from the Makefile.
Signed-off-by: Leo Yan <leo.yan@linux.dev>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@arm.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: linux-csky@vger.kernel.org
Cc: linux-riscv@lists.infradead.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240214113947.240957-5-leo.yan@linux.dev

tools/perf/Makefile.config

@@ -28,8 +28,6 @@ include $(srctree)/tools/scripts/Makefile.arch
 
 $(call detected_var,SRCARCH)
 
-NO_PERF_REGS := 1
-
 ifneq ($(NO_SYSCALL_TABLE),1)
   NO_SYSCALL_TABLE := 1
 
@@ -50,7 +48,6 @@ endif
 
 # Additional ARCH settings for ppc
 ifeq ($(SRCARCH),powerpc)
-  NO_PERF_REGS := 0
   CFLAGS += -I$(OUTPUT)arch/powerpc/include/generated
   LIBUNWIND_LIBS := -lunwind -lunwind-ppc64
 endif
@@ -66,41 +63,27 @@ ifeq ($(SRCARCH),x86)
   else
     LIBUNWIND_LIBS = -lunwind-x86 -llzma -lunwind
   endif
-  NO_PERF_REGS := 0
 endif
 
 ifeq ($(SRCARCH),arm)
-  NO_PERF_REGS := 0
   LIBUNWIND_LIBS = -lunwind -lunwind-arm
 endif
 
 ifeq ($(SRCARCH),arm64)
-  NO_PERF_REGS := 0
   CFLAGS += -I$(OUTPUT)arch/arm64/include/generated
   LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
 endif
 
 ifeq ($(SRCARCH),loongarch)
-  NO_PERF_REGS := 0
   CFLAGS += -I$(OUTPUT)arch/loongarch/include/generated
   LIBUNWIND_LIBS = -lunwind -lunwind-loongarch64
 endif
 
-ifeq ($(SRCARCH),riscv)
-  NO_PERF_REGS := 0
-endif
-
-ifeq ($(SRCARCH),csky)
-  NO_PERF_REGS := 0
-endif
-
 ifeq ($(ARCH),s390)
-  NO_PERF_REGS := 0
   CFLAGS += -fPIC -I$(OUTPUT)arch/s390/include/generated
 endif
 
 ifeq ($(ARCH),mips)
-  NO_PERF_REGS := 0
   CFLAGS += -I$(OUTPUT)arch/mips/include/generated
   LIBUNWIND_LIBS = -lunwind -lunwind-mips
 endif
@@ -161,10 +144,6 @@ endif
 FEATURE_CHECK_CFLAGS-libopencsd := $(LIBOPENCSD_CFLAGS)
 FEATURE_CHECK_LDFLAGS-libopencsd := $(LIBOPENCSD_LDFLAGS) $(OPENCSDLIBS)
 
-ifeq ($(NO_PERF_REGS),0)
-  CFLAGS += -DHAVE_PERF_REGS_SUPPORT
-endif
-
 # for linking with debug library, run like:
 # make DEBUG=1 LIBDW_DIR=/opt/libdw/
 ifdef LIBDW_DIR