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authorSamuli Piippo <samuli.piippo@theqtcompany.com>2015-02-12 14:44:25 +0200
committerSamuli Piippo <samuli.piippo@theqtcompany.com>2015-02-26 08:55:46 +0200
commitb2397a823399be9ae901d02f0073df5001b75c55 (patch)
tree9f12adaad26c1c29237e70e9a6d25bacc9b4927c /recipes
parentd025004a0d1a78ed67131d30f4251e1faf2d4083 (diff)
downloadmeta-boot2qt-b2397a823399be9ae901d02f0073df5001b75c55.tar.gz
Performance analysis tools for Linux
Build perf with DWARF unwinding support. Kernels older then 3.14 need to be patched to add ARM support. Kernels for tibidabo (3.0) and imx53 (2.6) are too old and would require more patches to be backported, so they are left without unwinding support. RPi needed extra layer to modify the kernel recipe, and linux-imx recipe was renamed so that it doesn't conflict with older tibidabo kernel recipe. Change-Id: Ic8331f8feeace67b32a5ce99ffd3fda517d595d1 Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com> Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>
Diffstat (limited to 'recipes')
-rw-r--r--recipes/linux/linux/ARM-perf-add-support-for-perf-registers-API.diff126
-rw-r--r--recipes/linux/linux/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch172
-rw-r--r--recipes/packagegroup/packagegroup-b2qt-embedded-tools.bb1
-rw-r--r--recipes/perf/perf.bbappend2
4 files changed, 301 insertions, 0 deletions
diff --git a/recipes/linux/linux/ARM-perf-add-support-for-perf-registers-API.diff b/recipes/linux/linux/ARM-perf-add-support-for-perf-registers-API.diff
new file mode 100644
index 0000000..e6f44fd
--- /dev/null
+++ b/recipes/linux/linux/ARM-perf-add-support-for-perf-registers-API.diff
@@ -0,0 +1,126 @@
1From 49863894db3ed7bd41541b1c17733273966cea71 Mon Sep 17 00:00:00 2001
2From: Will Deacon <will.deacon@arm.com>
3Date: Thu, 26 Sep 2013 12:36:35 +0100
4Subject: [PATCH] ARM: perf: add support for perf registers API
5
6This patch implements the functions required for the perf registers API,
7allowing the perf tool to interface kernel register dumps with libunwind
8in order to provide userspace backtracing.
9
10Cc: Jean Pihet <jean.pihet@linaro.org>
11Signed-off-by: Will Deacon <will.deacon@arm.com>
12---
13 arch/arm/Kconfig | 2 ++
14 arch/arm/include/uapi/asm/Kbuild | 1 +
15 arch/arm/include/uapi/asm/perf_regs.h | 23 +++++++++++++++++++++++
16 arch/arm/kernel/Makefile | 1 +
17 arch/arm/kernel/perf_regs.c | 30 ++++++++++++++++++++++++++++++
18 5 files changed, 57 insertions(+)
19 create mode 100644 arch/arm/include/uapi/asm/perf_regs.h
20 create mode 100644 arch/arm/kernel/perf_regs.c
21
22diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
23index 1ad6fb6..899d0c6 100644
24--- a/arch/arm/Kconfig
25+++ b/arch/arm/Kconfig
26@@ -51,6 +51,8 @@ config ARM
27 select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
28 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
29 select HAVE_PERF_EVENTS
30+ select HAVE_PERF_REGS
31+ select HAVE_PERF_USER_STACK_DUMP
32 select HAVE_REGS_AND_STACK_ACCESS_API
33 select HAVE_SYSCALL_TRACEPOINTS
34 select HAVE_UID16
35diff --git a/arch/arm/include/uapi/asm/Kbuild b/arch/arm/include/uapi/asm/Kbuild
36index 18d76fd..70a1c9d 100644
37--- a/arch/arm/include/uapi/asm/Kbuild
38+++ b/arch/arm/include/uapi/asm/Kbuild
39@@ -7,6 +7,7 @@ header-y += hwcap.h
40 header-y += ioctls.h
41 header-y += kvm_para.h
42 header-y += mman.h
43+header-y += perf_regs.h
44 header-y += posix_types.h
45 header-y += ptrace.h
46 header-y += setup.h
47diff --git a/arch/arm/include/uapi/asm/perf_regs.h b/arch/arm/include/uapi/asm/perf_regs.h
48new file mode 100644
49index 0000000..ce59448
50--- /dev/null
51+++ b/arch/arm/include/uapi/asm/perf_regs.h
52@@ -0,0 +1,23 @@
53+#ifndef _ASM_ARM_PERF_REGS_H
54+#define _ASM_ARM_PERF_REGS_H
55+
56+enum perf_event_arm_regs {
57+ PERF_REG_ARM_R0,
58+ PERF_REG_ARM_R1,
59+ PERF_REG_ARM_R2,
60+ PERF_REG_ARM_R3,
61+ PERF_REG_ARM_R4,
62+ PERF_REG_ARM_R5,
63+ PERF_REG_ARM_R6,
64+ PERF_REG_ARM_R7,
65+ PERF_REG_ARM_R8,
66+ PERF_REG_ARM_R9,
67+ PERF_REG_ARM_R10,
68+ PERF_REG_ARM_FP,
69+ PERF_REG_ARM_IP,
70+ PERF_REG_ARM_SP,
71+ PERF_REG_ARM_LR,
72+ PERF_REG_ARM_PC,
73+ PERF_REG_ARM_MAX,
74+};
75+#endif /* _ASM_ARM_PERF_REGS_H */
76diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
77index 5140df5f..9b818ca 100644
78--- a/arch/arm/kernel/Makefile
79+++ b/arch/arm/kernel/Makefile
80@@ -78,6 +78,7 @@ obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
81 obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
82 obj-$(CONFIG_CPU_PJ4) += pj4-cp0.o
83 obj-$(CONFIG_IWMMXT) += iwmmxt.o
84+obj-$(CONFIG_PERF_EVENTS) += perf_regs.o
85 obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o perf_event_cpu.o
86 AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
87 obj-$(CONFIG_ARM_CPU_TOPOLOGY) += topology.o
88diff --git a/arch/arm/kernel/perf_regs.c b/arch/arm/kernel/perf_regs.c
89new file mode 100644
90index 0000000..6e4379c
91--- /dev/null
92+++ b/arch/arm/kernel/perf_regs.c
93@@ -0,0 +1,30 @@
94+
95+#include <linux/errno.h>
96+#include <linux/kernel.h>
97+#include <linux/perf_event.h>
98+#include <linux/bug.h>
99+#include <asm/perf_regs.h>
100+#include <asm/ptrace.h>
101+
102+u64 perf_reg_value(struct pt_regs *regs, int idx)
103+{
104+ if (WARN_ON_ONCE((u32)idx >= PERF_REG_ARM_MAX))
105+ return 0;
106+
107+ return regs->uregs[idx];
108+}
109+
110+#define REG_RESERVED (~((1ULL << PERF_REG_ARM_MAX) - 1))
111+
112+int perf_reg_validate(u64 mask)
113+{
114+ if (!mask || mask & REG_RESERVED)
115+ return -EINVAL;
116+
117+ return 0;
118+}
119+
120+u64 perf_reg_abi(struct task_struct *task)
121+{
122+ return PERF_SAMPLE_REGS_ABI_32;
123+}
124--
1251.9.1
126
diff --git a/recipes/linux/linux/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch b/recipes/linux/linux/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch
new file mode 100644
index 0000000..1e497c6
--- /dev/null
+++ b/recipes/linux/linux/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch
@@ -0,0 +1,172 @@
1From 8abd7519c1fd2b6ae35eddbb41f93f44d3886000 Mon Sep 17 00:00:00 2001
2From: Will Deacon <will.deacon@arm.com>
3Date: Thu, 26 Sep 2013 12:36:36 +0100
4Subject: [PATCH] ARM: perf: wire up perf_regs and unwind support for ARM
5
6This patch hooks in the perf_regs and libunwind code for ARM.
7
8B2Qt: Backported for 3.10 kernel
9
10Cc: Jean Pihet <jean.pihet@linaro.org>
11Signed-off-by: Will Deacon <will.deacon@arm.com>
12---
13 tools/perf/Makefile | 6 +++-
14 tools/perf/arch/arm/Makefile | 3 ++
15 tools/perf/arch/arm/include/perf_regs.h | 54 +++++++++++++++++++++++++++++++++
16 tools/perf/arch/arm/util/unwind.c | 48 +++++++++++++++++++++++++++++
17 4 files changed, 110 insertions(+), 1 deletion(-)
18 create mode 100644 tools/perf/arch/arm/include/perf_regs.h
19 create mode 100644 tools/perf/arch/arm/util/unwind.c
20
21diff --git a/tools/perf/Makefile b/tools/perf/Makefile
22index b0f164b..f8fdad5 100644
23--- a/tools/perf/Makefile
24+++ b/tools/perf/Makefile
25@@ -87,6 +87,10 @@ ifeq ($(ARCH),x86_64)
26 NO_PERF_REGS := 0
27 LIBUNWIND_LIBS = -lunwind -lunwind-x86_64
28 endif
29+ifeq ($(ARCH),arm)
30+ NO_PERF_REGS := 0
31+ LIBUNWIND_LIBS = -lunwind -lunwind-arm
32+endif
33
34 # Treat warnings as errors unless directed not to
35 ifneq ($(WERROR),0)
36@@ -607,7 +611,7 @@ endif # SOURCE_LIBELF
37 endif # NO_LIBELF
38
39 # There's only x86 (both 32 and 64) support for CFI unwind so far
40-ifneq ($(ARCH),x86)
41+ifeq ($(LIBUNWIND_LIBS),)
42 NO_LIBUNWIND := 1
43 endif
44
45diff --git a/tools/perf/arch/arm/Makefile b/tools/perf/arch/arm/Makefile
46index 15130b5..fe9b61e 100644
47--- a/tools/perf/arch/arm/Makefile
48+++ b/tools/perf/arch/arm/Makefile
49@@ -2,3 +2,6 @@ ifndef NO_DWARF
50 PERF_HAVE_DWARF_REGS := 1
51 LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
52 endif
53+ifndef NO_LIBUNWIND
54+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
55+endif
56diff --git a/tools/perf/arch/arm/include/perf_regs.h b/tools/perf/arch/arm/include/perf_regs.h
57new file mode 100644
58index 0000000..2a1cfde
59--- /dev/null
60+++ b/tools/perf/arch/arm/include/perf_regs.h
61@@ -0,0 +1,54 @@
62+#ifndef ARCH_PERF_REGS_H
63+#define ARCH_PERF_REGS_H
64+
65+#include <stdlib.h>
66+#include "../../util/types.h"
67+#include <asm/perf_regs.h>
68+
69+#define PERF_REGS_MASK ((1ULL << PERF_REG_ARM_MAX) - 1)
70+#define PERF_REG_IP PERF_REG_ARM_PC
71+#define PERF_REG_SP PERF_REG_ARM_SP
72+
73+static inline const char *perf_reg_name(int id)
74+{
75+ switch (id) {
76+ case PERF_REG_ARM_R0:
77+ return "r0";
78+ case PERF_REG_ARM_R1:
79+ return "r1";
80+ case PERF_REG_ARM_R2:
81+ return "r2";
82+ case PERF_REG_ARM_R3:
83+ return "r3";
84+ case PERF_REG_ARM_R4:
85+ return "r4";
86+ case PERF_REG_ARM_R5:
87+ return "r5";
88+ case PERF_REG_ARM_R6:
89+ return "r6";
90+ case PERF_REG_ARM_R7:
91+ return "r7";
92+ case PERF_REG_ARM_R8:
93+ return "r8";
94+ case PERF_REG_ARM_R9:
95+ return "r9";
96+ case PERF_REG_ARM_R10:
97+ return "r10";
98+ case PERF_REG_ARM_FP:
99+ return "fp";
100+ case PERF_REG_ARM_IP:
101+ return "ip";
102+ case PERF_REG_ARM_SP:
103+ return "sp";
104+ case PERF_REG_ARM_LR:
105+ return "lr";
106+ case PERF_REG_ARM_PC:
107+ return "pc";
108+ default:
109+ return NULL;
110+ }
111+
112+ return NULL;
113+}
114+
115+#endif /* ARCH_PERF_REGS_H */
116diff --git a/tools/perf/arch/arm/util/unwind.c b/tools/perf/arch/arm/util/unwind.c
117new file mode 100644
118index 0000000..da3dc95
119--- /dev/null
120+++ b/tools/perf/arch/arm/util/unwind.c
121@@ -0,0 +1,48 @@
122+
123+#include <errno.h>
124+#include <libunwind.h>
125+#include "perf_regs.h"
126+#include "../../util/unwind.h"
127+
128+int unwind__arch_reg_id(int regnum)
129+{
130+ switch (regnum) {
131+ case UNW_ARM_R0:
132+ return PERF_REG_ARM_R0;
133+ case UNW_ARM_R1:
134+ return PERF_REG_ARM_R1;
135+ case UNW_ARM_R2:
136+ return PERF_REG_ARM_R2;
137+ case UNW_ARM_R3:
138+ return PERF_REG_ARM_R3;
139+ case UNW_ARM_R4:
140+ return PERF_REG_ARM_R4;
141+ case UNW_ARM_R5:
142+ return PERF_REG_ARM_R5;
143+ case UNW_ARM_R6:
144+ return PERF_REG_ARM_R6;
145+ case UNW_ARM_R7:
146+ return PERF_REG_ARM_R7;
147+ case UNW_ARM_R8:
148+ return PERF_REG_ARM_R8;
149+ case UNW_ARM_R9:
150+ return PERF_REG_ARM_R9;
151+ case UNW_ARM_R10:
152+ return PERF_REG_ARM_R10;
153+ case UNW_ARM_R11:
154+ return PERF_REG_ARM_FP;
155+ case UNW_ARM_R12:
156+ return PERF_REG_ARM_IP;
157+ case UNW_ARM_R13:
158+ return PERF_REG_ARM_SP;
159+ case UNW_ARM_R14:
160+ return PERF_REG_ARM_LR;
161+ case UNW_ARM_R15:
162+ return PERF_REG_ARM_PC;
163+ default:
164+ pr_err("unwind: invalid reg id %d\n", regnum);
165+ return -EINVAL;
166+ }
167+
168+ return -EINVAL;
169+}
170--
1711.9.1
172
diff --git a/recipes/packagegroup/packagegroup-b2qt-embedded-tools.bb b/recipes/packagegroup/packagegroup-b2qt-embedded-tools.bb
index bce34ab..abd2d66 100644
--- a/recipes/packagegroup/packagegroup-b2qt-embedded-tools.bb
+++ b/recipes/packagegroup/packagegroup-b2qt-embedded-tools.bb
@@ -31,4 +31,5 @@ RDEPENDS_${PN} = "\
31 binutils \ 31 binutils \
32 binutils-symlinks \ 32 binutils-symlinks \
33 i2c-tools \ 33 i2c-tools \
34 perf \
34 " 35 "
diff --git a/recipes/perf/perf.bbappend b/recipes/perf/perf.bbappend
new file mode 100644
index 0000000..1eec18d
--- /dev/null
+++ b/recipes/perf/perf.bbappend
@@ -0,0 +1,2 @@
1PERF_FEATURES_ENABLE = "perf-libunwind"
2EXTRA_OEMAKE_remove = "NO_DWARF=1"
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-15 18:53:54 +0000