[PATCH v3 0/3] Add MIPS support to perf tools

[PATCH v3 0/3] Add MIPS support to perf tools

[Ralf Baechle]

A long time ago David Daney submitted patches to add MIPS support to
perf-tools.  Running out of out of time the the series the minor reviewer
comments were never dealt with so I now picked up the series and am posting
a version 3.

David Daney (3):
  MIPS: Add user stack and registers to perf.
  perf tools: Add support for MIPS userspace DWARF callchains.
  perf tools: Hook up MIPS unwind and dwarf-regs in the Makefile
---
 v3: Fixed issues raised by Jiri Olsa in the previous version.  The short
     review thread is archived at
     https://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=cover.1428450297.git.ralf%40linux-mips.org

 arch/mips/Kconfig                            |  2 +
 arch/mips/include/uapi/asm/perf_regs.h       | 41 ++++++++++++++
 arch/mips/kernel/Makefile                    |  2 +-
 arch/mips/kernel/perf_regs.c                 | 67 ++++++++++++++++++++++
 tools/perf/arch/mips/Build                   |  2 +-
 tools/perf/arch/mips/Makefile                |  7 +++
 tools/perf/arch/mips/include/perf_regs.h     | 84 ++++++++++++++++++++++++++++
 tools/perf/arch/mips/util/Build              |  2 +
 tools/perf/arch/mips/util/dwarf-regs.c       | 37 ++++++++++++
 tools/perf/arch/mips/util/unwind-libunwind.c | 20 +++++++
 tools/perf/config/Makefile                   |  5 ++
 11 files changed, 267 insertions(+), 2 deletions(-)
 create mode 100644 arch/mips/include/uapi/asm/perf_regs.h
 create mode 100644 arch/mips/kernel/perf_regs.c
 create mode 100644 tools/perf/arch/mips/Makefile
 create mode 100644 tools/perf/arch/mips/include/perf_regs.h
 create mode 100644 tools/perf/arch/mips/util/Build
 create mode 100644 tools/perf/arch/mips/util/dwarf-regs.c
 create mode 100644 tools/perf/arch/mips/util/unwind-libunwind.c

-- 
2.5.5

[PATCH v3 1/3] MIPS: Add user stack and registers to perf.

[Ralf Baechle]

From: David Daney <david.daney@cavium.com>

This allows for extracting off-line stack traces from user-space code
in the perf tool.

[ralf@linux-mips.org: Add perf_get_regs_user() which is required after
88a7c26af8da (perf: >> Move task_pt_regs sampling into arch code).]

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/Kconfig                      |  2 +
 arch/mips/include/uapi/asm/perf_regs.h | 41 +++++++++++++++++++++
 arch/mips/kernel/Makefile              |  2 +-
 arch/mips/kernel/perf_regs.c           | 67 ++++++++++++++++++++++++++++++++++
 4 files changed, 111 insertions(+), 1 deletion(-)
 create mode 100644 arch/mips/include/uapi/asm/perf_regs.h
 create mode 100644 arch/mips/kernel/perf_regs.c

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 35d92a1..6051f58 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -11,6 +11,8 @@ config MIPS
 	select HAVE_IDE
 	select HAVE_OPROFILE
 	select HAVE_PERF_EVENTS
+	select HAVE_PERF_REGS
+	select HAVE_PERF_USER_STACK_DUMP
 	select PERF_USE_VMALLOC
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_SECCOMP_FILTER
diff --git a/arch/mips/include/uapi/asm/perf_regs.h b/arch/mips/include/uapi/asm/perf_regs.h
new file mode 100644
index 0000000..9577af5
--- /dev/null
+++ b/arch/mips/include/uapi/asm/perf_regs.h
@@ -0,0 +1,41 @@
+#ifndef _ASM_MIPS_PERF_REGS_H
+#define _ASM_MIPS_PERF_REGS_H
+
+enum perf_event_mips_regs {
+	PERF_REG_MIPS_PC,
+	PERF_REG_MIPS_R1,
+	PERF_REG_MIPS_R2,
+	PERF_REG_MIPS_R3,
+	PERF_REG_MIPS_R4,
+	PERF_REG_MIPS_R5,
+	PERF_REG_MIPS_R6,
+	PERF_REG_MIPS_R7,
+	PERF_REG_MIPS_R8,
+	PERF_REG_MIPS_R9,
+	PERF_REG_MIPS_R10,
+	PERF_REG_MIPS_R11,
+	PERF_REG_MIPS_R12,
+	PERF_REG_MIPS_R13,
+	PERF_REG_MIPS_R14,
+	PERF_REG_MIPS_R15,
+	PERF_REG_MIPS_R16,
+	PERF_REG_MIPS_R17,
+	PERF_REG_MIPS_R18,
+	PERF_REG_MIPS_R19,
+	PERF_REG_MIPS_R20,
+	PERF_REG_MIPS_R21,
+	PERF_REG_MIPS_R22,
+	PERF_REG_MIPS_R23,
+	PERF_REG_MIPS_R24,
+	PERF_REG_MIPS_R25,
+	/*
+	 * 26 and 27 are k0 and k1, they are always clobbered thus not
+	 * stored.
+	 */
+	PERF_REG_MIPS_R28,
+	PERF_REG_MIPS_R29,
+	PERF_REG_MIPS_R30,
+	PERF_REG_MIPS_R31,
+	PERF_REG_MIPS_MAX = PERF_REG_MIPS_R31 + 1,
+};
+#endif /* _ASM_MIPS_PERF_REGS_H */
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 6a24628..1cdf1e9 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -97,7 +97,7 @@ CFLAGS_cpu-bugs64.o	= $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/n
 
 obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT)	+= 8250-platform.o
 
-obj-$(CONFIG_PERF_EVENTS)	+= perf_event.o
+obj-$(CONFIG_PERF_EVENTS)	+= perf_event.o perf_regs.o
 obj-$(CONFIG_HW_PERF_EVENTS)	+= perf_event_mipsxx.o
 
 obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o
diff --git a/arch/mips/kernel/perf_regs.c b/arch/mips/kernel/perf_regs.c
new file mode 100644
index 0000000..65bb25c
--- /dev/null
+++ b/arch/mips/kernel/perf_regs.c
@@ -0,0 +1,67 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Some parts derived from x86 version of this file.
+ *
+ * Copyright (C) 2013 Cavium, Inc.
+ */
+
+#include <linux/perf_event.h>
+
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_32BIT
+u64 perf_reg_abi(struct task_struct *tsk)
+{
+	return PERF_SAMPLE_REGS_ABI_32;
+}
+#else /* Must be CONFIG_64BIT */
+u64 perf_reg_abi(struct task_struct *tsk)
+{
+	if (test_tsk_thread_flag(tsk, TIF_32BIT_REGS))
+		return PERF_SAMPLE_REGS_ABI_32;
+	else
+		return PERF_SAMPLE_REGS_ABI_64;
+}
+#endif /* CONFIG_32BIT */
+
+int perf_reg_validate(u64 mask)
+{
+	if (!mask)
+		return -EINVAL;
+	if (mask & ~((1ull << PERF_REG_MIPS_MAX) - 1))
+		return -EINVAL;
+	return 0;
+}
+
+u64 perf_reg_value(struct pt_regs *regs, int idx)
+{
+	long v;
+
+	switch (idx) {
+	case PERF_REG_MIPS_PC:
+		v = regs->cp0_epc;
+		break;
+	case PERF_REG_MIPS_R1 ... PERF_REG_MIPS_R25:
+		v = regs->regs[idx - PERF_REG_MIPS_R1 + 1];
+		break;
+	case PERF_REG_MIPS_R28 ... PERF_REG_MIPS_R31:
+		v = regs->regs[idx - PERF_REG_MIPS_R28 + 28];
+		break;
+
+	default:
+		WARN_ON_ONCE(1);
+		return 0;
+	}
+
+	return (s64)v; /* Sign extend if 32-bit. */
+}
+
+void perf_get_regs_user(struct perf_regs *regs_user,
+	struct pt_regs *regs, struct pt_regs *regs_user_copy)
+{
+	regs_user->regs = task_pt_regs(current);
+	regs_user->abi = perf_reg_abi(current);
+}
-- 
2.5.5

[PATCH v3 2/3] perf tools: Add support for MIPS userspace DWARF callchains.

[Ralf Baechle]

From: David Daney <david.daney@cavium.com>

Hack up the Makefile and add support code for mips unwinding
and dwarf-regs.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 tools/perf/arch/mips/Build                   |  2 +-
 tools/perf/arch/mips/Makefile                |  7 +++
 tools/perf/arch/mips/include/perf_regs.h     | 84 ++++++++++++++++++++++++++++
 tools/perf/arch/mips/util/Build              |  2 +
 tools/perf/arch/mips/util/dwarf-regs.c       | 37 ++++++++++++
 tools/perf/arch/mips/util/unwind-libunwind.c | 20 +++++++
 6 files changed, 151 insertions(+), 1 deletion(-)
 create mode 100644 tools/perf/arch/mips/Makefile
 create mode 100644 tools/perf/arch/mips/include/perf_regs.h
 create mode 100644 tools/perf/arch/mips/util/Build
 create mode 100644 tools/perf/arch/mips/util/dwarf-regs.c
 create mode 100644 tools/perf/arch/mips/util/unwind-libunwind.c

diff --git a/tools/perf/arch/mips/Build b/tools/perf/arch/mips/Build
index 1bb8bf6..54afe4a 100644
--- a/tools/perf/arch/mips/Build
+++ b/tools/perf/arch/mips/Build
@@ -1 +1 @@
-# empty
+libperf-y += util/
diff --git a/tools/perf/arch/mips/Makefile b/tools/perf/arch/mips/Makefile
new file mode 100644
index 0000000..fe9b61e
--- /dev/null
+++ b/tools/perf/arch/mips/Makefile
@@ -0,0 +1,7 @@
+ifndef NO_DWARF
+PERF_HAVE_DWARF_REGS := 1
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
+endif
+ifndef NO_LIBUNWIND
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
+endif
diff --git a/tools/perf/arch/mips/include/perf_regs.h b/tools/perf/arch/mips/include/perf_regs.h
new file mode 100644
index 0000000..a91b904
--- /dev/null
+++ b/tools/perf/arch/mips/include/perf_regs.h
@@ -0,0 +1,84 @@
+#ifndef ARCH_PERF_REGS_H
+#define ARCH_PERF_REGS_H
+
+#include <stdlib.h>
+#include "../../util/types.h"
+#include <asm/perf_regs.h>
+
+#define PERF_REG_IP PERF_REG_MIPS_PC
+#define PERF_REG_SP PERF_REG_MIPS_R29
+
+#define PERF_REGS_MASK ((1ULL << PERF_REG_MIPS_MAX) - 1)
+
+static inline const char *perf_reg_name(int id)
+{
+	switch (id) {
+	case PERF_REG_MIPS_PC:
+		return "PC";
+	case PERF_REG_MIPS_R1:
+		return "$1";
+	case PERF_REG_MIPS_R2:
+		return "$2";
+	case PERF_REG_MIPS_R3:
+		return "$3";
+	case PERF_REG_MIPS_R4:
+		return "$4";
+	case PERF_REG_MIPS_R5:
+		return "$5";
+	case PERF_REG_MIPS_R6:
+		return "$6";
+	case PERF_REG_MIPS_R7:
+		return "$7";
+	case PERF_REG_MIPS_R8:
+		return "$8";
+	case PERF_REG_MIPS_R9:
+		return "$9";
+	case PERF_REG_MIPS_R10:
+		return "$10";
+	case PERF_REG_MIPS_R11:
+		return "$11";
+	case PERF_REG_MIPS_R12:
+		return "$12";
+	case PERF_REG_MIPS_R13:
+		return "$13";
+	case PERF_REG_MIPS_R14:
+		return "$14";
+	case PERF_REG_MIPS_R15:
+		return "$15";
+	case PERF_REG_MIPS_R16:
+		return "$16";
+	case PERF_REG_MIPS_R17:
+		return "$17";
+	case PERF_REG_MIPS_R18:
+		return "$18";
+	case PERF_REG_MIPS_R19:
+		return "$19";
+	case PERF_REG_MIPS_R20:
+		return "$20";
+	case PERF_REG_MIPS_R21:
+		return "$21";
+	case PERF_REG_MIPS_R22:
+		return "$22";
+	case PERF_REG_MIPS_R23:
+		return "$23";
+	case PERF_REG_MIPS_R24:
+		return "$24";
+	case PERF_REG_MIPS_R25:
+		return "$25";
+
+	case PERF_REG_MIPS_R28:
+		return "$28";
+	case PERF_REG_MIPS_R29:
+		return "$29";
+	case PERF_REG_MIPS_R30:
+		return "$30";
+	case PERF_REG_MIPS_R31:
+		return "$31";
+	default:
+		break;
+	}
+	return NULL;
+}
+
+
+#endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/mips/util/Build b/tools/perf/arch/mips/util/Build
new file mode 100644
index 0000000..baeccb0
--- /dev/null
+++ b/tools/perf/arch/mips/util/Build
@@ -0,0 +1,2 @@
+libperf-$(CONFIG_DWARF)		+= dwarf-regs.o
+libperf-$(CONFIG_LIBUNWIND)	+= unwind-libunwind.o
diff --git a/tools/perf/arch/mips/util/dwarf-regs.c b/tools/perf/arch/mips/util/dwarf-regs.c
new file mode 100644
index 0000000..165e017
--- /dev/null
+++ b/tools/perf/arch/mips/util/dwarf-regs.c
@@ -0,0 +1,37 @@
+/*
+ * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
+ *
+ * Copyright (C) 2013 Cavium, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <libio.h>
+#include <dwarf-regs.h>
+
+static const char *mips_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)
+{
+	if (n < 32)
+		return mips_gpr_names[n];
+	if (n == 64)
+		return "hi";
+	if (n == 65)
+		return "lo";
+	return NULL;
+}
diff --git a/tools/perf/arch/mips/util/unwind-libunwind.c b/tools/perf/arch/mips/util/unwind-libunwind.c
new file mode 100644
index 0000000..612949b
--- /dev/null
+++ b/tools/perf/arch/mips/util/unwind-libunwind.c
@@ -0,0 +1,20 @@
+
+#include <errno.h>
+#include <libunwind.h>
+#include "perf_regs.h"
+#include "../../util/unwind.h"
+
+int unwind__arch_reg_id(int regnum)
+{
+	switch (regnum) {
+	case UNW_MIPS_R1 ... UNW_MIPS_R25:
+		return regnum - UNW_MIPS_R1 + PERF_REG_MIPS_R1;
+	case UNW_MIPS_R28 ... UNW_MIPS_R31:
+		return regnum - UNW_MIPS_R28 + PERF_REG_MIPS_R28;
+	case UNW_MIPS_PC:
+		return PERF_REG_MIPS_PC;
+	default:
+		pr_err("unwind: invalid reg id %d\n", regnum);
+		return -EINVAL;
+	}
+}
-- 
2.5.5

Re: [PATCH v3 2/3] perf tools: Add support for MIPS userspace DWARF callchains.

[Arnaldo Carvalho de Melo]

Em Fri, Apr 01, 2016 at 10:56:56AM +0200, Ralf Baechle escreveu:
> From: David Daney <david.daney@cavium.com>
> 
> Hack up the Makefile and add support code for mips unwinding
> and dwarf-regs.

Bzzt, failing to build on a minimal mips64 debian experimental env, on the one
hand you expect perf/arch/mips/util/dwarf-regs.o to be built but something,
probably some missing devel package, is not triggering its build:

# docker run -v /home/acme/git:/git --privileged=true --rm=true -t -i perf-build-minimal-debian-experimental-x-mips64
make: Entering directory '/git/linux/tools/perf'
  BUILD:   Doing 'make -j4' parallel build
sh: 1: command: Illegal option -c

Auto-detecting system features:
...                         dwarf: [ OFF ]
...                         glibc: [ on  ]
...                          gtk2: [ OFF ]
...                      libaudit: [ OFF ]
...                        libbfd: [ OFF ]
...                        libelf: [ OFF ]
...                       libnuma: [ OFF ]
...        numa_num_possible_cpus: [ OFF ]
...                       libperl: [ OFF ]
...                     libpython: [ OFF ]
...                      libslang: [ OFF ]
...                     libcrypto: [ OFF ]
...                     libunwind: [ OFF ]
...            libdw-dwarf-unwind: [ OFF ]
...                          zlib: [ OFF ]
...                          lzma: [ OFF ]
...                     get_cpuid: [ OFF ]
...                           bpf: [ on  ]

config/Makefile:246: No libelf found, disables 'probe' tool and BPF support in 'perf record', please install elfutils-libelf-devel/libelf-dev
config/Makefile:364: Disabling post unwind, no support found.
config/Makefile:405: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev
config/Makefile:416: No libcrypto.h found, disables jitted code injection, please install libssl-devel or libssl-dev
config/Makefile:431: slang not found, disables TUI support. Please install slang-devel or libslang-dev
config/Makefile:445: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev
config/Makefile:473: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
config/Makefile:499: No python interpreter was found: disables Python support - please install python-devel/python-dev
config/Makefile:606: No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev
config/Makefile:619: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev
config/Makefile:676: Your gcc lacks the __get_cpuid() builtin, disables support for auxtrace/Intel PT, please install a newer gcc
  MKDIR    /tmp/build/perf/util/
  CC       /tmp/build/perf/util/alias.o
  MKDIR    /tmp/build/perf/fd/
  CC       /tmp/build/perf/exec-cmd.o
  CC       /tmp/build/perf/event-parse.o
  CC       /tmp/build/perf/fd/array.o
  LD       /tmp/build/perf/fd/libapi-in.o
  MKDIR    /tmp/build/perf/fs/
  CC       /tmp/build/perf/fs/fs.o
  MKDIR    /tmp/build/perf/util/
  CC       /tmp/build/perf/util/annotate.o
  CC       /tmp/build/perf/help.o
  MKDIR    /tmp/build/perf/fs/
  CC       /tmp/build/perf/fs/tracing_path.o
  CC       /tmp/build/perf/pager.o
  LD       /tmp/build/perf/fs/libapi-in.o
  CC       /tmp/build/perf/cpu.o
  CC       /tmp/build/perf/event-plugin.o
  CC       /tmp/build/perf/parse-options.o
  CC       /tmp/build/perf/debug.o
  LD       /tmp/build/perf/libapi-in.o
  AR       /tmp/build/perf/libapi.a
  CC       /tmp/build/perf/trace-seq.o
  CC       /tmp/build/perf/parse-filter.o
  CC       /tmp/build/perf/parse-utils.o
  CC       /tmp/build/perf/kbuffer-parse.o
  LD       /tmp/build/perf/libtraceevent-in.o
  LINK     /tmp/build/perf/libtraceevent.a
  GEN      /tmp/build/perf/common-cmds.h
  CC       /tmp/build/perf/plugin_jbd2.o
  LD       /tmp/build/perf/plugin_jbd2-in.o
  CC       /tmp/build/perf/plugin_hrtimer.o
  PERF_VERSION = 4.5.0
  CC       /tmp/build/perf/builtin-bench.o
  LD       /tmp/build/perf/plugin_hrtimer-in.o
  CC       /tmp/build/perf/plugin_kmem.o
  CC       /tmp/build/perf/run-command.o
  LD       /tmp/build/perf/plugin_kmem-in.o
  CC       /tmp/build/perf/plugin_kvm.o
  LD       /tmp/build/perf/plugin_kvm-in.o
  CC       /tmp/build/perf/plugin_mac80211.o
  LD       /tmp/build/perf/plugin_mac80211-in.o
  CC       /tmp/build/perf/plugin_sched_switch.o
  CC       /tmp/build/perf/builtin-annotate.o
  CC       /tmp/build/perf/sigchain.o
  LD       /tmp/build/perf/plugin_sched_switch-in.o
  CC       /tmp/build/perf/util/build-id.o
  CC       /tmp/build/perf/plugin_function.o
  LD       /tmp/build/perf/plugin_function-in.o
  CC       /tmp/build/perf/plugin_xen.o
  CC       /tmp/build/perf/subcmd-config.o
  LD       /tmp/build/perf/plugin_xen-in.o
  CC       /tmp/build/perf/plugin_scsi.o
  LD       /tmp/build/perf/libsubcmd-in.o
  AR       /tmp/build/perf/libsubcmd.a
  GEN      perf-archive
  GEN      perf-with-kcore
  CC       /tmp/build/perf/plugin_cfg80211.o
  LD       /tmp/build/perf/plugin_scsi-in.o
  MKDIR    /tmp/build/perf/arch/
  CC       /tmp/build/perf/arch/common.o
  LD       /tmp/build/perf/plugin_cfg80211-in.o
  LINK     /tmp/build/perf/plugin_jbd2.so
  LINK     /tmp/build/perf/plugin_hrtimer.so
  LINK     /tmp/build/perf/plugin_kmem.so
  LINK     /tmp/build/perf/plugin_kvm.so
  CC       /tmp/build/perf/builtin-config.o
  LINK     /tmp/build/perf/plugin_mac80211.so
  LINK     /tmp/build/perf/plugin_sched_switch.so
  LINK     /tmp/build/perf/plugin_function.so
  LINK     /tmp/build/perf/plugin_xen.so
  LINK     /tmp/build/perf/plugin_scsi.so
  CC       /tmp/build/perf/builtin-diff.o
  LINK     /tmp/build/perf/plugin_cfg80211.so
  MKDIR    /tmp/build/perf/arch/mips/util/
  LD       /tmp/build/perf/arch/mips/util/libperf-in.o
  LD       /tmp/build/perf/arch/mips/libperf-in.o
  CC       /tmp/build/perf/util/config.o
  LD       /tmp/build/perf/arch/libperf-in.o
  CC       /tmp/build/perf/builtin-evlist.o
  GEN      /tmp/build/perf/libtraceevent-dynamic-list
  CC       /tmp/build/perf/builtin-help.o
  CC       /tmp/build/perf/builtin-sched.o
  MKDIR    /tmp/build/perf/ui/
  CC       /tmp/build/perf/ui/setup.o
  CC       /tmp/build/perf/util/ctype.o
  CC       /tmp/build/perf/util/db-export.o
  MKDIR    /tmp/build/perf/ui/
  CC       /tmp/build/perf/ui/helpline.o
  CC       /tmp/build/perf/builtin-buildid-list.o
  CC       /tmp/build/perf/ui/progress.o
  CC       /tmp/build/perf/ui/util.o
  CC       /tmp/build/perf/util/env.o
  CC       /tmp/build/perf/builtin-buildid-cache.o
  CC       /tmp/build/perf/ui/hist.o
  CC       /tmp/build/perf/util/event.o
  CC       /tmp/build/perf/util/evlist.o
  CC       /tmp/build/perf/builtin-list.o
  CC       /tmp/build/perf/builtin-record.o
  CC       /tmp/build/perf/util/evsel.o
  CC       /tmp/build/perf/builtin-report.o
  CC       /tmp/build/perf/util/find_bit.o

  CC       /tmp/build/perf/util/kallsyms.o
  CC       /tmp/build/perf/util/levenshtein.o
  CC       /tmp/build/perf/util/llvm-utils.o
  MKDIR    /tmp/build/perf/ui/stdio/
  CC       /tmp/build/perf/ui/stdio/hist.o
  CC       /tmp/build/perf/builtin-stat.o
  BISON    /tmp/build/perf/util/parse-events-bison.c
  CC       /tmp/build/perf/util/perf_regs.o
  CC       /tmp/build/perf/util/path.o
  CC       /tmp/build/perf/util/rbtree.o
  LD       /tmp/build/perf/ui/libperf-in.o
  MKDIR    /tmp/build/perf/scripts/
  LD       /tmp/build/perf/scripts/libperf-in.o
  CC       /tmp/build/perf/builtin-timechart.o
  CC       /tmp/build/perf/util/libstring.o
  CC       /tmp/build/perf/util/bitmap.o
  CC       /tmp/build/perf/util/hweight.o
  CC       /tmp/build/perf/util/quote.o
  CC       /tmp/build/perf/util/strbuf.o
  CC       /tmp/build/perf/util/string.o
  CC       /tmp/build/perf/util/strlist.o
  CC       /tmp/build/perf/util/strfilter.o
  CC       /tmp/build/perf/util/top.o
  CC       /tmp/build/perf/builtin-top.o
  CC       /tmp/build/perf/util/usage.o
  CC       /tmp/build/perf/builtin-script.o
  CC       /tmp/build/perf/util/wrapper.o
  CC       /tmp/build/perf/util/dso.o
  CC       /tmp/build/perf/util/symbol.o
  CC       /tmp/build/perf/util/color.o
  CC       /tmp/build/perf/builtin-kmem.o
  CC       /tmp/build/perf/util/header.o
  CC       /tmp/build/perf/util/callchain.o
  CC       /tmp/build/perf/builtin-lock.o
  CC       /tmp/build/perf/builtin-kvm.o
  CC       /tmp/build/perf/builtin-inject.o
  CC       /tmp/build/perf/builtin-mem.o
  CC       /tmp/build/perf/builtin-data.o
  CC       /tmp/build/perf/builtin-version.o
  MKDIR    /tmp/build/perf/bench/
  CC       /tmp/build/perf/bench/sched-messaging.o
  MKDIR    /tmp/build/perf/tests/
  CC       /tmp/build/perf/tests/builtin-test.o
  CC       /tmp/build/perf/perf.o
  CC       /tmp/build/perf/util/values.o
  MKDIR    /tmp/build/perf/bench/
  CC       /tmp/build/perf/bench/sched-pipe.o
  MKDIR    /tmp/build/perf/tests/
  CC       /tmp/build/perf/tests/parse-events.o
  CC       /tmp/build/perf/util/debug.o
  CC       /tmp/build/perf/bench/mem-functions.o
  CC       /tmp/build/perf/bench/futex-hash.o
  CC       /tmp/build/perf/util/machine.o
  CC       /tmp/build/perf/bench/futex-wake.o
  CC       /tmp/build/perf/bench/futex-wake-parallel.o
  CC       /tmp/build/perf/bench/futex-requeue.o
  CC       /tmp/build/perf/bench/futex-lock-pi.o
  CC       /tmp/build/perf/util/map.o
  LD       /tmp/build/perf/bench/perf-in.o
  CC       /tmp/build/perf/util/pstack.o
  CC       /tmp/build/perf/util/session.o
  CC       /tmp/build/perf/tests/dso-data.o
  CC       /tmp/build/perf/util/ordered-events.o
  CC       /tmp/build/perf/util/comm.o
  CC       /tmp/build/perf/util/thread.o
  CC       /tmp/build/perf/tests/attr.o
  CC       /tmp/build/perf/util/thread_map.o
  CC       /tmp/build/perf/util/trace-event-parse.o
  CC       /tmp/build/perf/tests/vmlinux-kallsyms.o
  CC       /tmp/build/perf/tests/openat-syscall.o
  CC       /tmp/build/perf/util/parse-events-bison.o
  BISON    /tmp/build/perf/util/pmu-bison.c
  CC       /tmp/build/perf/util/trace-event-read.o
  CC       /tmp/build/perf/tests/openat-syscall-all-cpus.o
  CC       /tmp/build/perf/tests/openat-syscall-tp-fields.o
  CC       /tmp/build/perf/tests/mmap-basic.o
  CC       /tmp/build/perf/util/trace-event-info.o
  CC       /tmp/build/perf/tests/perf-record.o
  CC       /tmp/build/perf/tests/evsel-roundtrip-name.o
  CC       /tmp/build/perf/util/trace-event-scripting.o
  CC       /tmp/build/perf/util/trace-event.o
  CC       /tmp/build/perf/tests/evsel-tp-sched.o
  CC       /tmp/build/perf/tests/fdarray.o
  CC       /tmp/build/perf/util/svghelper.o
  CC       /tmp/build/perf/util/sort.o
  CC       /tmp/build/perf/tests/pmu.o
  CC       /tmp/build/perf/tests/hists_common.o
  CC       /tmp/build/perf/tests/hists_link.o
  CC       /tmp/build/perf/tests/hists_filter.o
  CC       /tmp/build/perf/tests/hists_output.o
  CC       /tmp/build/perf/util/hist.o
  CC       /tmp/build/perf/tests/hists_cumulate.o
  CC       /tmp/build/perf/tests/python-use.o
  CC       /tmp/build/perf/tests/bp_signal.o
  CC       /tmp/build/perf/tests/bp_signal_overflow.o
  CC       /tmp/build/perf/tests/task-exit.o
  CC       /tmp/build/perf/tests/sw-clock.o
  CC       /tmp/build/perf/util/util.o
  CC       /tmp/build/perf/tests/mmap-thread-lookup.o
  CC       /tmp/build/perf/tests/thread-mg-share.o
  CC       /tmp/build/perf/tests/switch-tracking.o
  CC       /tmp/build/perf/tests/keep-tracking.o
  CC       /tmp/build/perf/util/xyarray.o
  CC       /tmp/build/perf/util/cpumap.o
  CC       /tmp/build/perf/tests/code-reading.o
  CC       /tmp/build/perf/util/cgroup.o
  CC       /tmp/build/perf/tests/sample-parsing.o
  CC       /tmp/build/perf/util/target.o
  CC       /tmp/build/perf/util/rblist.o
  CC       /tmp/build/perf/util/intlist.o
  CC       /tmp/build/perf/tests/parse-no-sample-id-all.o
  CC       /tmp/build/perf/tests/kmod-path.o
  CC       /tmp/build/perf/util/vdso.o
  CC       /tmp/build/perf/util/counts.o
  CC       /tmp/build/perf/tests/thread-map.o
  CC       /tmp/build/perf/util/stat.o
  CC       /tmp/build/perf/util/stat-shadow.o
  CC       /tmp/build/perf/tests/llvm.o
  CC       /tmp/build/perf/tests/bpf.o
  CC       /tmp/build/perf/tests/topology.o
  CC       /tmp/build/perf/util/record.o
  CC       /tmp/build/perf/tests/cpumap.o
  CC       /tmp/build/perf/util/srcline.o
  CC       /tmp/build/perf/tests/stat.o
  CC       /tmp/build/perf/tests/event_update.o
  CC       /tmp/build/perf/tests/event-times.o
  CC       /tmp/build/perf/util/data.o
  CC       /tmp/build/perf/util/tsc.o
  CC       /tmp/build/perf/util/cloexec.o
  CC       /tmp/build/perf/util/thread-stack.o
  CC       /tmp/build/perf/util/parse-branch-options.o
  CC       /tmp/build/perf/util/parse-regs-options.o
  CC       /tmp/build/perf/tests/llvm-src-base.o
  CC       /tmp/build/perf/tests/llvm-src-kbuild.o
  CC       /tmp/build/perf/tests/llvm-src-prologue.o
  CC       /tmp/build/perf/util/term.o
  CC       /tmp/build/perf/tests/llvm-src-relocation.o
  LD       /tmp/build/perf/tests/perf-in.o
  CC       /tmp/build/perf/util/help-unknown-cmd.o
  CC       /tmp/build/perf/util/mem-events.o
  LD       /tmp/build/perf/perf-in.o
  CC       /tmp/build/perf/util/symbol-minimal.o
  MKDIR    /tmp/build/perf/util/scripting-engines/
  LD       /tmp/build/perf/util/scripting-engines/libperf-in.o
  CC       /tmp/build/perf/util/demangle-java.o
  FLEX     /tmp/build/perf/util/parse-events-flex.c
  FLEX     /tmp/build/perf/util/pmu-flex.c
  CC       /tmp/build/perf/util/pmu-bison.o
  CC       /tmp/build/perf/util/parse-events.o
  CC       /tmp/build/perf/util/parse-events-flex.o
  CC       /tmp/build/perf/util/pmu.o
  CC       /tmp/build/perf/util/pmu-flex.o
  LD       /tmp/build/perf/util/libperf-in.o
  LD       /tmp/build/perf/libperf-in.o
  AR       /tmp/build/perf/libperf.a
mips64-linux-gnuabi64-ar: /tmp/build/perf/arch/mips/util/dwarf-regs.o: No such file or directory
Makefile.perf:437: recipe for target '/tmp/build/perf/libperf.a' failed
make[1]: *** [/tmp/build/perf/libperf.a] Error 1
Makefile:108: recipe for target 'install-bin' failed
make: *** [install-bin] Error 2
make: Leaving directory '/git/linux/tools/perf'
[root@jouet ~]#
 
> Signed-off-by: David Daney <david.daney@cavium.com>
> Cc: linux-mips@linux-mips.org
> Cc: Jiri Olsa <jolsa@redhat.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
> ---
>  tools/perf/arch/mips/Build                   |  2 +-
>  tools/perf/arch/mips/Makefile                |  7 +++
>  tools/perf/arch/mips/include/perf_regs.h     | 84 ++++++++++++++++++++++++++++
>  tools/perf/arch/mips/util/Build              |  2 +
>  tools/perf/arch/mips/util/dwarf-regs.c       | 37 ++++++++++++
>  tools/perf/arch/mips/util/unwind-libunwind.c | 20 +++++++
>  6 files changed, 151 insertions(+), 1 deletion(-)
>  create mode 100644 tools/perf/arch/mips/Makefile
>  create mode 100644 tools/perf/arch/mips/include/perf_regs.h
>  create mode 100644 tools/perf/arch/mips/util/Build
>  create mode 100644 tools/perf/arch/mips/util/dwarf-regs.c
>  create mode 100644 tools/perf/arch/mips/util/unwind-libunwind.c
> 
> diff --git a/tools/perf/arch/mips/Build b/tools/perf/arch/mips/Build
> index 1bb8bf6..54afe4a 100644
> --- a/tools/perf/arch/mips/Build
> +++ b/tools/perf/arch/mips/Build
> @@ -1 +1 @@
> -# empty
> +libperf-y += util/
> diff --git a/tools/perf/arch/mips/Makefile b/tools/perf/arch/mips/Makefile
> new file mode 100644
> index 0000000..fe9b61e
> --- /dev/null
> +++ b/tools/perf/arch/mips/Makefile
> @@ -0,0 +1,7 @@
> +ifndef NO_DWARF
> +PERF_HAVE_DWARF_REGS := 1
> +LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
> +endif
> +ifndef NO_LIBUNWIND
> +LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
> +endif
> diff --git a/tools/perf/arch/mips/include/perf_regs.h b/tools/perf/arch/mips/include/perf_regs.h
> new file mode 100644
> index 0000000..a91b904
> --- /dev/null
> +++ b/tools/perf/arch/mips/include/perf_regs.h
> @@ -0,0 +1,84 @@
> +#ifndef ARCH_PERF_REGS_H
> +#define ARCH_PERF_REGS_H
> +
> +#include <stdlib.h>
> +#include "../../util/types.h"
> +#include <asm/perf_regs.h>
> +
> +#define PERF_REG_IP PERF_REG_MIPS_PC
> +#define PERF_REG_SP PERF_REG_MIPS_R29
> +
> +#define PERF_REGS_MASK ((1ULL << PERF_REG_MIPS_MAX) - 1)
> +
> +static inline const char *perf_reg_name(int id)
> +{
> +	switch (id) {
> +	case PERF_REG_MIPS_PC:
> +		return "PC";
> +	case PERF_REG_MIPS_R1:
> +		return "$1";
> +	case PERF_REG_MIPS_R2:
> +		return "$2";
> +	case PERF_REG_MIPS_R3:
> +		return "$3";
> +	case PERF_REG_MIPS_R4:
> +		return "$4";
> +	case PERF_REG_MIPS_R5:
> +		return "$5";
> +	case PERF_REG_MIPS_R6:
> +		return "$6";
> +	case PERF_REG_MIPS_R7:
> +		return "$7";
> +	case PERF_REG_MIPS_R8:
> +		return "$8";
> +	case PERF_REG_MIPS_R9:
> +		return "$9";
> +	case PERF_REG_MIPS_R10:
> +		return "$10";
> +	case PERF_REG_MIPS_R11:
> +		return "$11";
> +	case PERF_REG_MIPS_R12:
> +		return "$12";
> +	case PERF_REG_MIPS_R13:
> +		return "$13";
> +	case PERF_REG_MIPS_R14:
> +		return "$14";
> +	case PERF_REG_MIPS_R15:
> +		return "$15";
> +	case PERF_REG_MIPS_R16:
> +		return "$16";
> +	case PERF_REG_MIPS_R17:
> +		return "$17";
> +	case PERF_REG_MIPS_R18:
> +		return "$18";
> +	case PERF_REG_MIPS_R19:
> +		return "$19";
> +	case PERF_REG_MIPS_R20:
> +		return "$20";
> +	case PERF_REG_MIPS_R21:
> +		return "$21";
> +	case PERF_REG_MIPS_R22:
> +		return "$22";
> +	case PERF_REG_MIPS_R23:
> +		return "$23";
> +	case PERF_REG_MIPS_R24:
> +		return "$24";
> +	case PERF_REG_MIPS_R25:
> +		return "$25";
> +
> +	case PERF_REG_MIPS_R28:
> +		return "$28";
> +	case PERF_REG_MIPS_R29:
> +		return "$29";
> +	case PERF_REG_MIPS_R30:
> +		return "$30";
> +	case PERF_REG_MIPS_R31:
> +		return "$31";
> +	default:
> +		break;
> +	}
> +	return NULL;
> +}
> +
> +
> +#endif /* ARCH_PERF_REGS_H */
> diff --git a/tools/perf/arch/mips/util/Build b/tools/perf/arch/mips/util/Build
> new file mode 100644
> index 0000000..baeccb0
> --- /dev/null
> +++ b/tools/perf/arch/mips/util/Build
> @@ -0,0 +1,2 @@
> +libperf-$(CONFIG_DWARF)		+= dwarf-regs.o
> +libperf-$(CONFIG_LIBUNWIND)	+= unwind-libunwind.o
> diff --git a/tools/perf/arch/mips/util/dwarf-regs.c b/tools/perf/arch/mips/util/dwarf-regs.c
> new file mode 100644
> index 0000000..165e017
> --- /dev/null
> +++ b/tools/perf/arch/mips/util/dwarf-regs.c
> @@ -0,0 +1,37 @@
> +/*
> + * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
> + *
> + * Copyright (C) 2013 Cavium, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#include <libio.h>
> +#include <dwarf-regs.h>
> +
> +static const char *mips_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)
> +{
> +	if (n < 32)
> +		return mips_gpr_names[n];
> +	if (n == 64)
> +		return "hi";
> +	if (n == 65)
> +		return "lo";
> +	return NULL;
> +}
> diff --git a/tools/perf/arch/mips/util/unwind-libunwind.c b/tools/perf/arch/mips/util/unwind-libunwind.c
> new file mode 100644
> index 0000000..612949b
> --- /dev/null
> +++ b/tools/perf/arch/mips/util/unwind-libunwind.c
> @@ -0,0 +1,20 @@
> +
> +#include <errno.h>
> +#include <libunwind.h>
> +#include "perf_regs.h"
> +#include "../../util/unwind.h"
> +
> +int unwind__arch_reg_id(int regnum)
> +{
> +	switch (regnum) {
> +	case UNW_MIPS_R1 ... UNW_MIPS_R25:
> +		return regnum - UNW_MIPS_R1 + PERF_REG_MIPS_R1;
> +	case UNW_MIPS_R28 ... UNW_MIPS_R31:
> +		return regnum - UNW_MIPS_R28 + PERF_REG_MIPS_R28;
> +	case UNW_MIPS_PC:
> +		return PERF_REG_MIPS_PC;
> +	default:
> +		pr_err("unwind: invalid reg id %d\n", regnum);
> +		return -EINVAL;
> +	}
> +}
> -- 
> 2.5.5
> 

[PATCH v3 3/3] perf tools: Hook up MIPS unwind and dwarf-regs in the Makefile

[Ralf Baechle]

From: David Daney <david.daney@cavium.com>

Define a new symbol (ARCH_SUPPORTS_LIBUNWIND) in config/Makefile.
Use this from x86 and MIPS to gate testing of libunwind.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: linux-kernel@vger.kernel.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 tools/perf/config/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index f7d7f5a..713c69c 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -51,6 +51,11 @@ ifeq ($(NO_PERF_REGS),0)
   $(call detected,CONFIG_PERF_REGS)
 endif
 
+ifeq ($(ARCH),mips)
+  NO_PERF_REGS := 0
+  LIBUNWIND_LIBS = -lunwind -lunwind-mips
+endif
+
 # So far there's only x86 and arm libdw unwind support merged in perf.
 # Disable it on all other architectures in case libdw unwind
 # support is detected in system. Add supported architectures
-- 
2.5.5

Re: [PATCH v3 3/3] perf tools: Hook up MIPS unwind and dwarf-regs in the Makefile

[Sergei Shtylyov]

Hello.

On 4/1/2016 11:56 AM, Ralf Baechle wrote:

> From: David Daney <david.daney@cavium.com>
>
> Define a new symbol (ARCH_SUPPORTS_LIBUNWIND) in config/Makefile.

    Eh? Where is it?

> Use this from x86 and MIPS to gate testing of libunwind.

    x86? Where?

> Signed-off-by: David Daney <david.daney@cavium.com>
> Cc: linux-mips@linux-mips.org
> Cc: Jiri Olsa <jolsa@redhat.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
> ---
>   tools/perf/config/Makefile | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
> index f7d7f5a..713c69c 100644
> --- a/tools/perf/config/Makefile
> +++ b/tools/perf/config/Makefile
> @@ -51,6 +51,11 @@ ifeq ($(NO_PERF_REGS),0)
>     $(call detected,CONFIG_PERF_REGS)
>   endif
>
> +ifeq ($(ARCH),mips)
> +  NO_PERF_REGS := 0
> +  LIBUNWIND_LIBS = -lunwind -lunwind-mips
> +endif
> +
>   # So far there's only x86 and arm libdw unwind support merged in perf.
>   # Disable it on all other architectures in case libdw unwind
>   # support is detected in system. Add supported architectures

MBR, Sergei

Re: [PATCH v3 3/3] perf tools: Hook up MIPS unwind and dwarf-regs in the Makefile

[Ralf Baechle]

On Fri, Apr 01, 2016 at 01:58:34PM +0300, Sergei Shtylyov wrote:

> On 4/1/2016 11:56 AM, Ralf Baechle wrote:
> 
> >From: David Daney <david.daney@cavium.com>
> >
> >Define a new symbol (ARCH_SUPPORTS_LIBUNWIND) in config/Makefile.
> 
>    Eh? Where is it?
> 
> >Use this from x86 and MIPS to gate testing of libunwind.
> 
>    x86? Where?

ARCH_SUPPORTS_LIBUNWIND was unused in the original version of the patch
and I removed it but didn't update the comment.

  Ralf