perf tools loongarch: Use syscall table

loongarch uses a syscall table, use that in perf instead of using unistd.h.

Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Guo Ren <guoren@kernel.org>
Cc: Günther Noack <gnoack@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mickaël Salaün <mic@digikod.net>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20250108-perf_syscalltbl-v6-12-7543b5293098@rivosinc.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile.config

@@ -31,7 +31,7 @@ $(call detected_var,SRCARCH)
 ifneq ($(NO_SYSCALL_TABLE),1)
   NO_SYSCALL_TABLE := 1
 
-  ifeq ($(SRCARCH),$(filter $(SRCARCH),powerpc s390 mips loongarch))
+  ifeq ($(SRCARCH),$(filter $(SRCARCH),powerpc s390 mips))
     NO_SYSCALL_TABLE := 0
   endif
 
@@ -85,7 +85,6 @@ ifeq ($(SRCARCH),arm64)
 endif
 
 ifeq ($(SRCARCH),loongarch)
-  CFLAGS += -I$(OUTPUT)arch/loongarch/include/generated
   ifndef NO_LIBUNWIND
     LIBUNWIND_LIBS = -lunwind -lunwind-loongarch64
   endif

tools/perf/Makefile.perf

@@ -311,7 +311,7 @@ FEATURE_TESTS := all
 endif
 endif
 # architectures that use the generic syscall table
-generic_syscall_table_archs := riscv arc csky arm sh sparc xtensa x86 alpha parisc arm64
+generic_syscall_table_archs := riscv arc csky arm sh sparc xtensa x86 alpha parisc arm64 loongarch
 ifneq ($(filter $(SRCARCH), $(generic_syscall_table_archs)),)
 include $(srctree)/tools/perf/scripts/Makefile.syscalls
 endif

tools/perf/arch/loongarch/Makefile

@@ -1,25 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
 PERF_HAVE_JITDUMP := 1
 HAVE_KVM_STAT_SUPPORT := 1
-
-#
-# Syscall table generation for perf
-#
-
-out    := $(OUTPUT)arch/loongarch/include/generated/asm
-header := $(out)/syscalls.c
-incpath := $(srctree)/tools
-sysdef := $(srctree)/tools/arch/loongarch/include/uapi/asm/unistd.h
-sysprf := $(srctree)/tools/perf/arch/loongarch/entry/syscalls/
-systbl := $(sysprf)/mksyscalltbl
-
-# Create output directory if not already present
-$(shell [ -d '$(out)' ] || mkdir -p '$(out)')
-
-$(header): $(sysdef) $(systbl)
-	$(Q)$(SHELL) '$(systbl)' '$(CC)' '$(HOSTCC)' $(incpath) $(sysdef) > $@
-
-clean::
-	$(call QUIET_CLEAN, loongarch) $(RM) $(header)
-
-archheaders: $(header)

tools/perf/arch/loongarch/entry/syscalls/Kbuild

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+syscall-y += syscalls_64.h

tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+syscall_abis_64 +=

tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl

@@ -1,45 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-#
-# Generate system call table for perf. Derived from
-# powerpc script.
-#
-# Author(s):  Ming Wang <wangming01@loongson.cn>
-# Author(s):  Huacai Chen <chenhuacai@loongson.cn>
-# Copyright (C) 2020-2023 Loongson Technology Corporation Limited
-
-gcc=$1
-hostcc=$2
-incpath=$3
-input=$4
-
-if ! test -r $input; then
-	echo "Could not read input file" >&2
-	exit 1
-fi
-
-create_sc_table()
-{
-	local sc nr max_nr
-
-	while read sc nr; do
-		printf "%s\n" "	[$nr] = \"$sc\","
-		max_nr=$nr
-	done
-
-	echo "#define SYSCALLTBL_LOONGARCH_MAX_ID $max_nr"
-}
-
-create_table()
-{
-	echo "#include \"$input\""
-	echo "static const char *const syscalltbl_loongarch[] = {"
-	create_sc_table
-	echo "};"
-}
-
-$gcc -E -dM -x c -I $incpath/include/uapi $input \
-	|awk '$2 ~ "__NR" && $3 !~ "__NR3264_" {
-		sub("^#define __NR(3264)?_", "");
-		print | "sort -k2 -n"}' \
-	|create_table

tools/perf/arch/loongarch/include/syscall_table.h

@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <asm/syscall_table_64.h>

tools/perf/util/syscalltbl.c

@@ -30,10 +30,6 @@ static const char *const *syscalltbl_native = syscalltbl_powerpc_32;
 #include <asm/syscalls_n64.c>
 const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID;
 static const char *const *syscalltbl_native = syscalltbl_mips_n64;
-#elif defined(__loongarch__)
-#include <asm/syscalls.c>
-const int syscalltbl_native_max_id = SYSCALLTBL_LOONGARCH_MAX_ID;
-static const char *const *syscalltbl_native = syscalltbl_loongarch;
 #elif defined(GENERIC_SYSCALL_TABLE)
 #include <syscall_table.h>
 const int syscalltbl_native_max_id = SYSCALLTBL_MAX_ID;