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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>
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Lines changed: 518 additions & 3 deletions

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‎tools/arch/loongarch/include/uapi/asm/perf_regs.h‎

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _ASM_LOONGARCH_PERF_REGS_H
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#define _ASM_LOONGARCH_PERF_REGS_H
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enum perf_event_loongarch_regs {
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PERF_REG_LOONGARCH_PC,
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PERF_REG_LOONGARCH_R1,
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PERF_REG_LOONGARCH_R2,
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PERF_REG_LOONGARCH_R3,
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PERF_REG_LOONGARCH_R4,
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PERF_REG_LOONGARCH_R5,
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PERF_REG_LOONGARCH_R6,
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PERF_REG_LOONGARCH_R7,
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PERF_REG_LOONGARCH_R8,
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PERF_REG_LOONGARCH_R9,
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PERF_REG_LOONGARCH_R10,
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PERF_REG_LOONGARCH_R11,
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PERF_REG_LOONGARCH_R12,
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PERF_REG_LOONGARCH_R13,
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PERF_REG_LOONGARCH_R14,
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PERF_REG_LOONGARCH_R15,
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PERF_REG_LOONGARCH_R16,
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PERF_REG_LOONGARCH_R17,
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PERF_REG_LOONGARCH_R18,
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PERF_REG_LOONGARCH_R19,
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PERF_REG_LOONGARCH_R20,
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PERF_REG_LOONGARCH_R21,
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PERF_REG_LOONGARCH_R22,
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PERF_REG_LOONGARCH_R23,
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PERF_REG_LOONGARCH_R24,
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PERF_REG_LOONGARCH_R25,
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PERF_REG_LOONGARCH_R26,
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PERF_REG_LOONGARCH_R27,
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PERF_REG_LOONGARCH_R28,
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PERF_REG_LOONGARCH_R29,
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PERF_REG_LOONGARCH_R30,
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PERF_REG_LOONGARCH_R31,
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PERF_REG_LOONGARCH_MAX,
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};
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#endif /* _ASM_LOONGARCH_PERF_REGS_H */

‎tools/arch/loongarch/include/uapi/asm/unistd.h‎

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright (C) 2020-2023 Loongson Technology Corporation Limited
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*/
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#define __ARCH_WANT_SYS_CLONE
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#define __ARCH_WANT_SYS_CLONE3
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#include <asm-generic/unistd.h>

‎tools/perf/Makefile.config‎

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@@ -38,7 +38,7 @@ ifneq ($(NO_SYSCALL_TABLE),1)
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NO_SYSCALL_TABLE := 0
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endif
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else
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ifeq ($(SRCARCH),$(filter $(SRCARCH),powerpc arm64 s390 mips))
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ifeq ($(SRCARCH),$(filter $(SRCARCH),powerpc arm64 s390 mips loongarch))
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NO_SYSCALL_TABLE := 0
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endif
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endif
@@ -80,6 +80,12 @@ ifeq ($(SRCARCH),arm64)
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LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
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endif
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ifeq ($(SRCARCH),loongarch)
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NO_PERF_REGS := 0
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CFLAGS += -I$(OUTPUT)arch/loongarch/include/generated
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LIBUNWIND_LIBS = -lunwind -lunwind-loongarch64
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endif
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ifeq ($(SRCARCH),riscv)
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NO_PERF_REGS := 0
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endif
@@ -107,7 +113,7 @@ endif
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# Disable it on all other architectures in case libdw unwind
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# support is detected in system. Add supported architectures
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# to the check.
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ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390 csky riscv))
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ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390 csky riscv loongarch))
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NO_LIBDW_DWARF_UNWIND := 1
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endif
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@@ -129,7 +135,7 @@ endef
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ifdef LIBUNWIND_DIR
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LIBUNWIND_CFLAGS = -I$(LIBUNWIND_DIR)/include
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LIBUNWIND_LDFLAGS = -L$(LIBUNWIND_DIR)/lib
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LIBUNWIND_ARCHS = x86 x86_64 arm aarch64 debug-frame-arm debug-frame-aarch64
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LIBUNWIND_ARCHS = x86 x86_64 arm aarch64 debug-frame-arm debug-frame-aarch64 loongarch
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$(foreach libunwind_arch,$(LIBUNWIND_ARCHS),$(call libunwind_arch_set_flags,$(libunwind_arch)))
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endif
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‎tools/perf/arch/loongarch/Build‎

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perf-y += util/

‎tools/perf/arch/loongarch/Makefile‎

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

‎tools/perf/arch/loongarch/annotate/instructions.c‎

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// SPDX-License-Identifier: GPL-2.0
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/*
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* Perf annotate functions.
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*
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* Copyright (C) 2020-2023 Loongson Technology Corporation Limited
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*/
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static
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struct ins_ops *loongarch__associate_ins_ops(struct arch *arch, const char *name)
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{
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struct ins_ops *ops = NULL;
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if (!strncmp(name, "beqz", 4) ||
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!strncmp(name, "bnez", 4) ||
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!strncmp(name, "beq", 3) ||
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!strncmp(name, "bne", 3) ||
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!strncmp(name, "blt", 3) ||
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!strncmp(name, "bge", 3) ||
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!strncmp(name, "bltu", 4) ||
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!strncmp(name, "bgeu", 4) ||
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!strncmp(name, "bl", 2))
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ops = &call_ops;
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else if (!strncmp(name, "jirl", 4))
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ops = &ret_ops;
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else if (name[0] == 'b')
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ops = &jump_ops;
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else
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return NULL;
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arch__associate_ins_ops(arch, name, ops);
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return ops;
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}
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static
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int loongarch__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
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{
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if (!arch->initialized) {
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arch->associate_instruction_ops = loongarch__associate_ins_ops;
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arch->initialized = true;
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arch->objdump.comment_char = '#';
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}
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return 0;
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}

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

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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Generate system call table for perf. Derived from
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# powerpc script.
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#
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# Author(s): Ming Wang <wangming01@loongson.cn>
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# Author(s): Huacai Chen <chenhuacai@loongson.cn>
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# Copyright (C) 2020-2023 Loongson Technology Corporation Limited
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gcc=$1
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hostcc=$2
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incpath=$3
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input=$4
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if ! test -r $input; then
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echo "Could not read input file" >&2
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exit 1
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fi
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create_table_from_c()
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{
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local sc nr last_sc
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create_table_exe=`mktemp ${TMPDIR:-/tmp}/create-table-XXXXXX`
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{
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cat <<-_EoHEADER
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#include <stdio.h>
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#include "$input"
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int main(int argc, char *argv[])
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{
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_EoHEADER
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while read sc nr; do
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printf "%s\n" " printf(\"\\t[%d] = \\\"$sc\\\",\\n\", $nr);"
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last_sc=$nr
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done
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printf "%s\n" " printf(\"#define SYSCALLTBL_LOONGARCH_MAX_ID %d\\n\", $last_sc);"
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printf "}\n"
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} | $hostcc -I $incpath/include/uapi -o $create_table_exe -x c -
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$create_table_exe
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rm -f $create_table_exe
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}
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create_table()
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{
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echo "static const char *syscalltbl_loongarch[] = {"
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create_table_from_c
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echo "};"
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}
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$gcc -E -dM -x c -I $incpath/include/uapi $input \
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|sed -ne 's/^#define __NR_//p' \
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|sort -t' ' -k2 -n \
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|create_table

‎tools/perf/arch/loongarch/include/dwarf-regs-table.h‎

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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* dwarf-regs-table.h : Mapping of DWARF debug register numbers into
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* register names.
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*
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* Copyright (C) 2020-2023 Loongson Technology Corporation Limited
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*/
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#ifdef DEFINE_DWARF_REGSTR_TABLE
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static const char * const loongarch_regstr_tbl[] = {
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"%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7",
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"%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15",
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"%r16", "%r17", "%r18", "%r19", "%r20", "%r21", "%r22", "%r23",
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"%r24", "%r25", "%r26", "%r27", "%r28", "%r29", "%r30", "%r31",
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};
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#endif

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

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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef ARCH_PERF_REGS_H
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#define ARCH_PERF_REGS_H
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#include <stdlib.h>
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#include <linux/types.h>
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#include <asm/perf_regs.h>
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#define PERF_REGS_MAX PERF_REG_LOONGARCH_MAX
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#define PERF_REG_IP PERF_REG_LOONGARCH_PC
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#define PERF_REG_SP PERF_REG_LOONGARCH_R3
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#define PERF_REGS_MASK ((1ULL << PERF_REG_LOONGARCH_MAX) - 1)
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#endif /* ARCH_PERF_REGS_H */

‎tools/perf/arch/loongarch/util/Build‎

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

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