tools/perf: Add basic support for LoongArch

Add basic support for LoongArch, which is very similar to the MIPS
version.

Signed-off-by: Ming Wang <wangming01@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

1 files changed, 61 insertions, 0 deletions

diff --git a/tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl b/tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl
new file mode 100755
index 000000000000..c52156f7204d
--- /dev/null
+++ b/tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl
@@ -0,0 +1,61 @@
+#!/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_table_from_c()
+{
+	local sc nr last_sc
+
+	create_table_exe=`mktemp ${TMPDIR:-/tmp}/create-table-XXXXXX`
+
+	{
+
+	cat <<-_EoHEADER
+		#include <stdio.h>
+		#include "$input"
+		int main(int argc, char *argv[])
+		{
+	_EoHEADER
+
+	while read sc nr; do
+		printf "%s\n" "	printf(\"\\t[%d] = \\\"$sc\\\",\\n\", $nr);"
+		last_sc=$nr
+	done
+
+	printf "%s\n" "	printf(\"#define SYSCALLTBL_LOONGARCH_MAX_ID %d\\n\", $last_sc);"
+	printf "}\n"
+
+	} | $hostcc -I $incpath/include/uapi -o $create_table_exe -x c -
+
+	$create_table_exe
+
+	rm -f $create_table_exe
+}
+
+create_table()
+{
+	echo "static const char *syscalltbl_loongarch[] = {"
+	create_table_from_c
+	echo "};"
+}
+
+$gcc -E -dM -x c  -I $incpath/include/uapi $input	       \
+	|sed -ne 's/^#define __NR_//p' \
+	|sort -t' ' -k2 -n \
+	|create_table