[PATCH] tools/perf: Add basic support for LoongArch

From: Huacai Chen
Date: Mon Mar 06 2023 - 21:19:31 EST

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

Signed-off-by: Ming Wang <wangming01@xxxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
---
.../loongarch/include/uapi/asm/perf_regs.h | 40 +++++++++
.../arch/loongarch/include/uapi/asm/unistd.h | 9 ++
tools/perf/Makefile.config | 7 ++
tools/perf/arch/loongarch/Build | 1 +
tools/perf/arch/loongarch/Makefile | 27 ++++++
.../arch/loongarch/annotate/instructions.c | 45 ++++++++++
.../loongarch/entry/syscalls/mksyscalltbl | 61 +++++++++++++
.../arch/loongarch/include/dwarf-regs-table.h | 16 ++++
tools/perf/arch/loongarch/include/perf_regs.h | 88 +++++++++++++++++++
tools/perf/arch/loongarch/util/Build | 4 +
tools/perf/arch/loongarch/util/dwarf-regs.c | 25 ++++++
tools/perf/arch/loongarch/util/perf_regs.c | 6 ++
.../arch/loongarch/util/unwind-libunwind.c | 82 +++++++++++++++++
tools/perf/util/annotate.c | 8 ++
tools/perf/util/dwarf-regs.c | 7 ++
tools/perf/util/env.c | 2 +
tools/perf/util/genelf.h | 3 +
tools/perf/util/syscalltbl.c | 4 +
18 files changed, 435 insertions(+)
create mode 100644 tools/arch/loongarch/include/uapi/asm/perf_regs.h
create mode 100644 tools/arch/loongarch/include/uapi/asm/unistd.h
create mode 100644 tools/perf/arch/loongarch/Build
create mode 100644 tools/perf/arch/loongarch/Makefile
create mode 100644 tools/perf/arch/loongarch/annotate/instructions.c
create mode 100755 tools/perf/arch/loongarch/entry/syscalls/mksyscalltbl
create mode 100644 tools/perf/arch/loongarch/include/dwarf-regs-table.h
create mode 100644 tools/perf/arch/loongarch/include/perf_regs.h
create mode 100644 tools/perf/arch/loongarch/util/Build
create mode 100644 tools/perf/arch/loongarch/util/dwarf-regs.c
create mode 100644 tools/perf/arch/loongarch/util/perf_regs.c
create mode 100644 tools/perf/arch/loongarch/util/unwind-libunwind.c

diff --git a/tools/arch/loongarch/include/uapi/asm/perf_regs.h b/tools/arch/loongarch/include/uapi/asm/perf_regs.h
new file mode 100644
index 000000000000..9943d418e01d
--- /dev/null
+++ b/tools/arch/loongarch/include/uapi/asm/perf_regs.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _ASM_LOONGARCH_PERF_REGS_H
+#define _ASM_LOONGARCH_PERF_REGS_H
+
+enum perf_event_loongarch_regs {
+ PERF_REG_LOONGARCH_PC,
+ PERF_REG_LOONGARCH_R1,
+ PERF_REG_LOONGARCH_R2,
+ PERF_REG_LOONGARCH_R3,
+ PERF_REG_LOONGARCH_R4,
+ PERF_REG_LOONGARCH_R5,
+ PERF_REG_LOONGARCH_R6,
+ PERF_REG_LOONGARCH_R7,
+ PERF_REG_LOONGARCH_R8,
+ PERF_REG_LOONGARCH_R9,
+ PERF_REG_LOONGARCH_R10,
+ PERF_REG_LOONGARCH_R11,
+ PERF_REG_LOONGARCH_R12,
+ PERF_REG_LOONGARCH_R13,
+ PERF_REG_LOONGARCH_R14,
+ PERF_REG_LOONGARCH_R15,
+ PERF_REG_LOONGARCH_R16,
+ PERF_REG_LOONGARCH_R17,
+ PERF_REG_LOONGARCH_R18,
+ PERF_REG_LOONGARCH_R19,
+ PERF_REG_LOONGARCH_R20,
+ PERF_REG_LOONGARCH_R21,
+ PERF_REG_LOONGARCH_R22,
+ PERF_REG_LOONGARCH_R23,
+ PERF_REG_LOONGARCH_R24,
+ PERF_REG_LOONGARCH_R25,
+ PERF_REG_LOONGARCH_R26,
+ PERF_REG_LOONGARCH_R27,
+ PERF_REG_LOONGARCH_R28,
+ PERF_REG_LOONGARCH_R29,
+ PERF_REG_LOONGARCH_R30,
+ PERF_REG_LOONGARCH_R31,
+ PERF_REG_LOONGARCH_MAX = PERF_REG_LOONGARCH_R31 + 1,
+};
+#endif /* _ASM_LOONGARCH_PERF_REGS_H */
diff --git a/tools/arch/loongarch/include/uapi/asm/unistd.h b/tools/arch/loongarch/include/uapi/asm/unistd.h
new file mode 100644
index 000000000000..0c743344e92d
--- /dev/null
+++ b/tools/arch/loongarch/include/uapi/asm/unistd.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_CLONE3
+
+#include <asm-generic/unistd.h>
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 3519a0139026..89230ae68721 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -80,6 +80,13 @@ ifeq ($(SRCARCH),arm64)
LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
endif

+ifeq ($(SRCARCH),loongarch)
+ NO_PERF_REGS := 0
+ CFLAGS += -I$(OUTPUT)arch/loongarch/include/generated
+ CFLAGS += -I$(OUTPUT)../arch/loongarch/include/uapi
+ LIBUNWIND_LIBS = -lunwind -lunwind-loongarch
+endif
+
ifeq ($(SRCARCH),riscv)
NO_PERF_REGS := 0
endif
diff --git a/tools/perf/arch/loongarch/Build b/tools/perf/arch/loongarch/Build
new file mode 100644
index 000000000000..e4e5f33c84d8
--- /dev/null
+++ b/tools/perf/arch/loongarch/Build
@@ -0,0 +1 @@
+perf-y += util/
diff --git a/tools/perf/arch/loongarch/Makefile b/tools/perf/arch/loongarch/Makefile
new file mode 100644
index 000000000000..1229157b09e1
--- /dev/null
+++ b/tools/perf/arch/loongarch/Makefile
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0
+ifndef NO_DWARF
+PERF_HAVE_DWARF_REGS := 1
+endif
+PERF_HAVE_JITDUMP := 1
+
+#
+# Syscall table generation for perf
+#
+
+out := $(OUTPUT)arch/loongarch/include/generated/asm
+header := $(out)/syscalls_64.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
+_dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)')
+
+$(header): $(sysdef) $(systbl)
+ $(Q)$(SHELL) '$(systbl)' '$(CC)' '$(HOSTCC)' $(incpath) $(sysdef) > $@
+
+clean::
+ $(call QUIET_CLEAN, loongarch) $(RM) $(header)
+
+archheaders: $(header)
diff --git a/tools/perf/arch/loongarch/annotate/instructions.c b/tools/perf/arch/loongarch/annotate/instructions.c
new file mode 100644
index 000000000000..ab21bf122135
--- /dev/null
+++ b/tools/perf/arch/loongarch/annotate/instructions.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Perf annotate functions.
+ *
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+static
+struct ins_ops *loongarch__associate_ins_ops(struct arch *arch, const char *name)
+{
+ struct ins_ops *ops = NULL;
+
+ if (!strncmp(name, "beqz", 4) ||
+ !strncmp(name, "bnez", 4) ||
+ !strncmp(name, "beq", 3) ||
+ !strncmp(name, "bne", 3) ||
+ !strncmp(name, "blt", 3) ||
+ !strncmp(name, "bge", 3) ||
+ !strncmp(name, "bltu", 4) ||
+ !strncmp(name, "bgeu", 4) ||
+ !strncmp(name, "bl", 2))
+ ops = &call_ops;
+ else if (!strncmp(name, "jirl", 4))
+ ops = &ret_ops;
+ else if (name[0] == 'b')
+ ops = &jump_ops;
+ else
+ return NULL;
+
+ arch__associate_ins_ops(arch, name, ops);
+
+ return ops;
+}
+
+static
+int loongarch__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
+{
+ if (!arch->initialized) {
+ arch->associate_instruction_ops = loongarch__associate_ins_ops;
+ arch->initialized = true;
+ arch->objdump.comment_char = '#';
+ }
+
+ return 0;
+}
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@xxxxxxxxxxx>
+# Author(s): Huacai Chen <chenhuacai@xxxxxxxxxxx>
+# 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
diff --git a/tools/perf/arch/loongarch/include/dwarf-regs-table.h b/tools/perf/arch/loongarch/include/dwarf-regs-table.h
new file mode 100644
index 000000000000..4b2291034668
--- /dev/null
+++ b/tools/perf/arch/loongarch/include/dwarf-regs-table.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * dwarf-regs-table.h : Mapping of DWARF debug register numbers into
+ * register names.
+ *
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#ifdef DEFINE_DWARF_REGSTR_TABLE
+static const char * const loongarch_regstr_tbl[] = {
+ "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
+ "$10", "$11", "$12", "$13", "$14", "$15", "$16", "$17", "$18", "$19",
+ "$20", "$21", "$22", "$23", "$24", "$25", "$26", "$27", "$28", "%29",
+ "$30", "$31",
+};
+#endif
diff --git a/tools/perf/arch/loongarch/include/perf_regs.h b/tools/perf/arch/loongarch/include/perf_regs.h
new file mode 100644
index 000000000000..82d531dcd90f
--- /dev/null
+++ b/tools/perf/arch/loongarch/include/perf_regs.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ARCH_PERF_REGS_H
+#define ARCH_PERF_REGS_H
+
+#include <stdlib.h>
+#include <linux/types.h>
+#include <asm/perf_regs.h>
+
+#define PERF_REGS_MAX PERF_REG_LOONGARCH_MAX
+#define PERF_REG_IP PERF_REG_LOONGARCH_PC
+#define PERF_REG_SP PERF_REG_LOONGARCH_R3
+
+#define PERF_REGS_MASK ((1ULL << PERF_REG_LOONGARCH_MAX) - 1)
+
+static inline const char *__perf_reg_name(int id)
+{
+ switch (id) {
+ case PERF_REG_LOONGARCH_PC:
+ return "PC";
+ case PERF_REG_LOONGARCH_R1:
+ return "$1";
+ case PERF_REG_LOONGARCH_R2:
+ return "$2";
+ case PERF_REG_LOONGARCH_R3:
+ return "$3";
+ case PERF_REG_LOONGARCH_R4:
+ return "$4";
+ case PERF_REG_LOONGARCH_R5:
+ return "$5";
+ case PERF_REG_LOONGARCH_R6:
+ return "$6";
+ case PERF_REG_LOONGARCH_R7:
+ return "$7";
+ case PERF_REG_LOONGARCH_R8:
+ return "$8";
+ case PERF_REG_LOONGARCH_R9:
+ return "$9";
+ case PERF_REG_LOONGARCH_R10:
+ return "$10";
+ case PERF_REG_LOONGARCH_R11:
+ return "$11";
+ case PERF_REG_LOONGARCH_R12:
+ return "$12";
+ case PERF_REG_LOONGARCH_R13:
+ return "$13";
+ case PERF_REG_LOONGARCH_R14:
+ return "$14";
+ case PERF_REG_LOONGARCH_R15:
+ return "$15";
+ case PERF_REG_LOONGARCH_R16:
+ return "$16";
+ case PERF_REG_LOONGARCH_R17:
+ return "$17";
+ case PERF_REG_LOONGARCH_R18:
+ return "$18";
+ case PERF_REG_LOONGARCH_R19:
+ return "$19";
+ case PERF_REG_LOONGARCH_R20:
+ return "$20";
+ case PERF_REG_LOONGARCH_R21:
+ return "$21";
+ case PERF_REG_LOONGARCH_R22:
+ return "$22";
+ case PERF_REG_LOONGARCH_R23:
+ return "$23";
+ case PERF_REG_LOONGARCH_R24:
+ return "$24";
+ case PERF_REG_LOONGARCH_R25:
+ return "$25";
+ case PERF_REG_LOONGARCH_R26:
+ return "$26";
+ case PERF_REG_LOONGARCH_R27:
+ return "$27";
+ case PERF_REG_LOONGARCH_R28:
+ return "$28";
+ case PERF_REG_LOONGARCH_R29:
+ return "$29";
+ case PERF_REG_LOONGARCH_R30:
+ return "$30";
+ case PERF_REG_LOONGARCH_R31:
+ return "$31";
+ default:
+ break;
+ }
+ return NULL;
+}
+
+#endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/loongarch/util/Build b/tools/perf/arch/loongarch/util/Build
new file mode 100644
index 000000000000..fab48acf21c5
--- /dev/null
+++ b/tools/perf/arch/loongarch/util/Build
@@ -0,0 +1,4 @@
+perf-y += perf_regs.o
+
+perf-$(CONFIG_DWARF) += dwarf-regs.o
+perf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
diff --git a/tools/perf/arch/loongarch/util/dwarf-regs.c b/tools/perf/arch/loongarch/util/dwarf-regs.c
new file mode 100644
index 000000000000..7db14897a384
--- /dev/null
+++ b/tools/perf/arch/loongarch/util/dwarf-regs.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
+ *
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ *
+ * Derived from MIPS:
+ * Copyright (C) 2013 Cavium, Inc.
+ */
+
+#include <stdio.h>
+#include <dwarf-regs.h>
+
+static const char *loongarch_gpr_names[32] = {
+ "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9",
+ "$10", "$11", "$12", "$13", "$14", "$15", "$16", "$17", "$18", "$19",
+ "$20", "$21", "$22", "$23", "$24", "$25", "$26", "$27", "$28", "$29",
+ "$30", "$31"
+};
+
+const char *get_arch_regstr(unsigned int n)
+{
+ n %= 32;
+ return loongarch_gpr_names[n];
+}
diff --git a/tools/perf/arch/loongarch/util/perf_regs.c b/tools/perf/arch/loongarch/util/perf_regs.c
new file mode 100644
index 000000000000..2833e101a7c6
--- /dev/null
+++ b/tools/perf/arch/loongarch/util/perf_regs.c
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../../util/perf_regs.h"
+
+const struct sample_reg sample_reg_masks[] = {
+ SMPL_REG_END
+};
diff --git a/tools/perf/arch/loongarch/util/unwind-libunwind.c b/tools/perf/arch/loongarch/util/unwind-libunwind.c
new file mode 100644
index 000000000000..f693167b86ef
--- /dev/null
+++ b/tools/perf/arch/loongarch/util/unwind-libunwind.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <errno.h>
+#include <libunwind.h>
+#include "perf_regs.h"
+#include "../../util/unwind.h"
+#include "util/debug.h"
+
+int libunwind__arch_reg_id(int regnum)
+{
+ switch (regnum) {
+ case UNW_LOONGARCH64_R1:
+ return PERF_REG_LOONGARCH_R1;
+ case UNW_LOONGARCH64_R2:
+ return PERF_REG_LOONGARCH_R2;
+ case UNW_LOONGARCH64_R3:
+ return PERF_REG_LOONGARCH_R3;
+ case UNW_LOONGARCH64_R4:
+ return PERF_REG_LOONGARCH_R4;
+ case UNW_LOONGARCH64_R5:
+ return PERF_REG_LOONGARCH_R5;
+ case UNW_LOONGARCH64_R6:
+ return PERF_REG_LOONGARCH_R6;
+ case UNW_LOONGARCH64_R7:
+ return PERF_REG_LOONGARCH_R7;
+ case UNW_LOONGARCH64_R8:
+ return PERF_REG_LOONGARCH_R8;
+ case UNW_LOONGARCH64_R9:
+ return PERF_REG_LOONGARCH_R9;
+ case UNW_LOONGARCH64_R10:
+ return PERF_REG_LOONGARCH_R10;
+ case UNW_LOONGARCH64_R11:
+ return PERF_REG_LOONGARCH_R11;
+ case UNW_LOONGARCH64_R12:
+ return PERF_REG_LOONGARCH_R12;
+ case UNW_LOONGARCH64_R13:
+ return PERF_REG_LOONGARCH_R13;
+ case UNW_LOONGARCH64_R14:
+ return PERF_REG_LOONGARCH_R14;
+ case UNW_LOONGARCH64_R15:
+ return PERF_REG_LOONGARCH_R15;
+ case UNW_LOONGARCH64_R16:
+ return PERF_REG_LOONGARCH_R16;
+ case UNW_LOONGARCH64_R17:
+ return PERF_REG_LOONGARCH_R17;
+ case UNW_LOONGARCH64_R18:
+ return PERF_REG_LOONGARCH_R18;
+ case UNW_LOONGARCH64_R19:
+ return PERF_REG_LOONGARCH_R19;
+ case UNW_LOONGARCH64_R20:
+ return PERF_REG_LOONGARCH_R20;
+ case UNW_LOONGARCH64_R21:
+ return PERF_REG_LOONGARCH_R21;
+ case UNW_LOONGARCH64_R22:
+ return PERF_REG_LOONGARCH_R22;
+ case UNW_LOONGARCH64_R23:
+ return PERF_REG_LOONGARCH_R23;
+ case UNW_LOONGARCH64_R24:
+ return PERF_REG_LOONGARCH_R24;
+ case UNW_LOONGARCH64_R25:
+ return PERF_REG_LOONGARCH_R25;
+ case UNW_LOONGARCH64_R26:
+ return PERF_REG_LOONGARCH_R26;
+ case UNW_LOONGARCH64_R27:
+ return PERF_REG_LOONGARCH_R27;
+ case UNW_LOONGARCH64_R28:
+ return PERF_REG_LOONGARCH_R28;
+ case UNW_LOONGARCH64_R29:
+ return PERF_REG_LOONGARCH_R29;
+ case UNW_LOONGARCH64_R30:
+ return PERF_REG_LOONGARCH_R30;
+ case UNW_LOONGARCH64_R31:
+ return PERF_REG_LOONGARCH_R31;
+ case UNW_LOONGARCH64_PC:
+ return PERF_REG_LOONGARCH_PC;
+ default:
+ pr_err("unwind: invalid reg id %d\n", regnum);
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index db475e44f42f..0cc7710f32da 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -149,6 +149,7 @@ static int arch__associate_ins_ops(struct arch* arch, const char *name, struct i
#include "arch/arm/annotate/instructions.c"
#include "arch/arm64/annotate/instructions.c"
#include "arch/csky/annotate/instructions.c"
+#include "arch/loongarch/annotate/instructions.c"
#include "arch/mips/annotate/instructions.c"
#include "arch/x86/annotate/instructions.c"
#include "arch/powerpc/annotate/instructions.c"
@@ -211,6 +212,13 @@ static struct arch architectures[] = {
.comment_char = '#',
},
},
+ {
+ .name = "loongarch",
+ .init = loongarch__annotate_init,
+ .objdump = {
+ .comment_char = '#',
+ },
+ },
};

static void ins__delete(struct ins_operands *ops)
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 3fa4486742cd..69cfaa5953bf 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -14,6 +14,10 @@
#define EM_AARCH64 183 /* ARM 64 bit */
#endif

+#ifndef EM_LOONGARCH
+#define EM_LOONGARCH 258 /* LoongArch */
+#endif
+
/* Define const char * {arch}_register_tbl[] */
#define DEFINE_DWARF_REGSTR_TABLE
#include "../arch/x86/include/dwarf-regs-table.h"
@@ -25,6 +29,7 @@
#include "../arch/sparc/include/dwarf-regs-table.h"
#include "../arch/xtensa/include/dwarf-regs-table.h"
#include "../arch/mips/include/dwarf-regs-table.h"
+#include "../arch/loongarch/include/dwarf-regs-table.h"

#define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)

@@ -56,6 +61,8 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
return __get_dwarf_regstr(xtensa_regstr_tbl, n);
case EM_MIPS:
return __get_dwarf_regstr(mips_regstr_tbl, n);
+ case EM_LOONGARCH:
+ return __get_dwarf_regstr(loongarch_regstr_tbl, n);
default:
pr_err("ELF MACHINE %x is not supported.\n", machine);
}
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 5b8cf6a421a4..0d5d40cb997b 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -435,6 +435,8 @@ static const char *normalize_arch(char *arch)
return "mips";
if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
return "sh";
+ if (!strncmp(arch, "loongarch", 9))
+ return "loongarch";

return arch;
}
diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h
index 6af062d1c452..5f18d20ea903 100644
--- a/tools/perf/util/genelf.h
+++ b/tools/perf/util/genelf.h
@@ -43,6 +43,9 @@ int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_ent
#elif defined(__riscv) && __riscv_xlen == 64
#define GEN_ELF_ARCH EM_RISCV
#define GEN_ELF_CLASS ELFCLASS64
+#elif defined(__loongarch__)
+#define GEN_ELF_ARCH EM_LOONGARCH
+#define GEN_ELF_CLASS ELFCLASS64
#else
#error "unsupported architecture"
#endif
diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index a2e906858891..313eccef6cb4 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -38,6 +38,10 @@ static const char **syscalltbl_native = syscalltbl_arm64;
#include <asm/syscalls_n64.c>
const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID;
static const char **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 **syscalltbl_native = syscalltbl_loongarch;
#endif

struct syscall {
--
2.39.1

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