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-rw-r--r--meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-add-support-for-perf-registers-API.diff128
-rw-r--r--meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch163
-rw-r--r--meta-beagleboard-extras/recipes/linux/linux-mainline_3.8.bbappend3
3 files changed, 294 insertions, 0 deletions
diff --git a/meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-add-support-for-perf-registers-API.diff b/meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-add-support-for-perf-registers-API.diff
new file mode 100644
index 0000000..13b251a
--- /dev/null
+++ b/meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-add-support-for-perf-registers-API.diff
@@ -0,0 +1,128 @@
1From 8221f36672b7a1336c2bf245c394f0b5453784a1 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
10B2Qt: Backported for 3.8 kernel
11
12Cc: Jean Pihet <jean.pihet@linaro.org>
13Signed-off-by: Will Deacon <will.deacon@arm.com>
14---
15 arch/arm/Kconfig | 2 ++
16 arch/arm/include/uapi/asm/Kbuild | 1 +
17 arch/arm/include/uapi/asm/perf_regs.h | 23 +++++++++++++++++++++++
18 arch/arm/kernel/Makefile | 1 +
19 arch/arm/kernel/perf_regs.c | 30 ++++++++++++++++++++++++++++++
20 5 files changed, 57 insertions(+)
21 create mode 100644 arch/arm/include/uapi/asm/perf_regs.h
22 create mode 100644 arch/arm/kernel/perf_regs.c
23
24diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
25index 67874b8..6f630be 100644
26--- a/arch/arm/Kconfig
27+++ b/arch/arm/Kconfig
28@@ -46,6 +46,8 @@ config ARM
29 select HAVE_MEMBLOCK
30 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
31 select HAVE_PERF_EVENTS
32+ select HAVE_PERF_REGS
33+ select HAVE_PERF_USER_STACK_DUMP
34 select HAVE_REGS_AND_STACK_ACCESS_API
35 select HAVE_SYSCALL_TRACEPOINTS
36 select HAVE_UID16
37diff --git a/arch/arm/include/uapi/asm/Kbuild b/arch/arm/include/uapi/asm/Kbuild
38index 47bcb2d..570b82f 100644
39--- a/arch/arm/include/uapi/asm/Kbuild
40+++ b/arch/arm/include/uapi/asm/Kbuild
41@@ -8,6 +8,7 @@ header-y += hwcap.h
42 header-y += ioctls.h
43 header-y += kvm_para.h
44 header-y += mman.h
45+header-y += perf_regs.h
46 header-y += posix_types.h
47 header-y += ptrace.h
48 header-y += setup.h
49diff --git a/arch/arm/include/uapi/asm/perf_regs.h b/arch/arm/include/uapi/asm/perf_regs.h
50new file mode 100644
51index 0000000..ce59448
52--- /dev/null
53+++ b/arch/arm/include/uapi/asm/perf_regs.h
54@@ -0,0 +1,23 @@
55+#ifndef _ASM_ARM_PERF_REGS_H
56+#define _ASM_ARM_PERF_REGS_H
57+
58+enum perf_event_arm_regs {
59+ PERF_REG_ARM_R0,
60+ PERF_REG_ARM_R1,
61+ PERF_REG_ARM_R2,
62+ PERF_REG_ARM_R3,
63+ PERF_REG_ARM_R4,
64+ PERF_REG_ARM_R5,
65+ PERF_REG_ARM_R6,
66+ PERF_REG_ARM_R7,
67+ PERF_REG_ARM_R8,
68+ PERF_REG_ARM_R9,
69+ PERF_REG_ARM_R10,
70+ PERF_REG_ARM_FP,
71+ PERF_REG_ARM_IP,
72+ PERF_REG_ARM_SP,
73+ PERF_REG_ARM_LR,
74+ PERF_REG_ARM_PC,
75+ PERF_REG_ARM_MAX,
76+};
77+#endif /* _ASM_ARM_PERF_REGS_H */
78diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
79index 5bbec7b..c6ab18f 100644
80--- a/arch/arm/kernel/Makefile
81+++ b/arch/arm/kernel/Makefile
82@@ -69,6 +69,7 @@ obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
83 obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
84 obj-$(CONFIG_CPU_PJ4) += pj4-cp0.o
85 obj-$(CONFIG_IWMMXT) += iwmmxt.o
86+obj-$(CONFIG_PERF_EVENTS) += perf_regs.o
87 obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o perf_event_cpu.o
88 AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
89 obj-$(CONFIG_ARM_CPU_TOPOLOGY) += topology.o
90diff --git a/arch/arm/kernel/perf_regs.c b/arch/arm/kernel/perf_regs.c
91new file mode 100644
92index 0000000..6e4379c
93--- /dev/null
94+++ b/arch/arm/kernel/perf_regs.c
95@@ -0,0 +1,30 @@
96+
97+#include <linux/errno.h>
98+#include <linux/kernel.h>
99+#include <linux/perf_event.h>
100+#include <linux/bug.h>
101+#include <asm/perf_regs.h>
102+#include <asm/ptrace.h>
103+
104+u64 perf_reg_value(struct pt_regs *regs, int idx)
105+{
106+ if (WARN_ON_ONCE((u32)idx >= PERF_REG_ARM_MAX))
107+ return 0;
108+
109+ return regs->uregs[idx];
110+}
111+
112+#define REG_RESERVED (~((1ULL << PERF_REG_ARM_MAX) - 1))
113+
114+int perf_reg_validate(u64 mask)
115+{
116+ if (!mask || mask & REG_RESERVED)
117+ return -EINVAL;
118+
119+ return 0;
120+}
121+
122+u64 perf_reg_abi(struct task_struct *task)
123+{
124+ return PERF_SAMPLE_REGS_ABI_32;
125+}
126--
1271.9.1
128
diff --git a/meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch b/meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch
new file mode 100644
index 0000000..e3e8d21
--- /dev/null
+++ b/meta-beagleboard-extras/recipes/linux/linux-mainline/ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch
@@ -0,0 +1,163 @@
1From 26f603c457e0af9f5f6a0ddda66e69978c7f43b4 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 3.8 kernel
9
10Cc: Jean Pihet <jean.pihet@linaro.org>
11Signed-off-by: Will Deacon <will.deacon@arm.com>
12---
13 tools/perf/Makefile | 4 +++
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, 109 insertions(+)
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 fb1b1c4..316c575 100644
23--- a/tools/perf/Makefile
24+++ b/tools/perf/Makefile
25@@ -84,6 +84,10 @@ 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)
36diff --git a/tools/perf/arch/arm/Makefile b/tools/perf/arch/arm/Makefile
37index 15130b5..fe9b61e 100644
38--- a/tools/perf/arch/arm/Makefile
39+++ b/tools/perf/arch/arm/Makefile
40@@ -2,3 +2,6 @@ ifndef NO_DWARF
41 PERF_HAVE_DWARF_REGS := 1
42 LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
43 endif
44+ifndef NO_LIBUNWIND
45+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
46+endif
47diff --git a/tools/perf/arch/arm/include/perf_regs.h b/tools/perf/arch/arm/include/perf_regs.h
48new file mode 100644
49index 0000000..2a1cfde
50--- /dev/null
51+++ b/tools/perf/arch/arm/include/perf_regs.h
52@@ -0,0 +1,54 @@
53+#ifndef ARCH_PERF_REGS_H
54+#define ARCH_PERF_REGS_H
55+
56+#include <stdlib.h>
57+#include "../../util/types.h"
58+#include <asm/perf_regs.h>
59+
60+#define PERF_REGS_MASK ((1ULL << PERF_REG_ARM_MAX) - 1)
61+#define PERF_REG_IP PERF_REG_ARM_PC
62+#define PERF_REG_SP PERF_REG_ARM_SP
63+
64+static inline const char *perf_reg_name(int id)
65+{
66+ switch (id) {
67+ case PERF_REG_ARM_R0:
68+ return "r0";
69+ case PERF_REG_ARM_R1:
70+ return "r1";
71+ case PERF_REG_ARM_R2:
72+ return "r2";
73+ case PERF_REG_ARM_R3:
74+ return "r3";
75+ case PERF_REG_ARM_R4:
76+ return "r4";
77+ case PERF_REG_ARM_R5:
78+ return "r5";
79+ case PERF_REG_ARM_R6:
80+ return "r6";
81+ case PERF_REG_ARM_R7:
82+ return "r7";
83+ case PERF_REG_ARM_R8:
84+ return "r8";
85+ case PERF_REG_ARM_R9:
86+ return "r9";
87+ case PERF_REG_ARM_R10:
88+ return "r10";
89+ case PERF_REG_ARM_FP:
90+ return "fp";
91+ case PERF_REG_ARM_IP:
92+ return "ip";
93+ case PERF_REG_ARM_SP:
94+ return "sp";
95+ case PERF_REG_ARM_LR:
96+ return "lr";
97+ case PERF_REG_ARM_PC:
98+ return "pc";
99+ default:
100+ return NULL;
101+ }
102+
103+ return NULL;
104+}
105+
106+#endif /* ARCH_PERF_REGS_H */
107diff --git a/tools/perf/arch/arm/util/unwind.c b/tools/perf/arch/arm/util/unwind.c
108new file mode 100644
109index 0000000..da3dc95
110--- /dev/null
111+++ b/tools/perf/arch/arm/util/unwind.c
112@@ -0,0 +1,48 @@
113+
114+#include <errno.h>
115+#include <libunwind.h>
116+#include "perf_regs.h"
117+#include "../../util/unwind.h"
118+
119+int unwind__arch_reg_id(int regnum)
120+{
121+ switch (regnum) {
122+ case UNW_ARM_R0:
123+ return PERF_REG_ARM_R0;
124+ case UNW_ARM_R1:
125+ return PERF_REG_ARM_R1;
126+ case UNW_ARM_R2:
127+ return PERF_REG_ARM_R2;
128+ case UNW_ARM_R3:
129+ return PERF_REG_ARM_R3;
130+ case UNW_ARM_R4:
131+ return PERF_REG_ARM_R4;
132+ case UNW_ARM_R5:
133+ return PERF_REG_ARM_R5;
134+ case UNW_ARM_R6:
135+ return PERF_REG_ARM_R6;
136+ case UNW_ARM_R7:
137+ return PERF_REG_ARM_R7;
138+ case UNW_ARM_R8:
139+ return PERF_REG_ARM_R8;
140+ case UNW_ARM_R9:
141+ return PERF_REG_ARM_R9;
142+ case UNW_ARM_R10:
143+ return PERF_REG_ARM_R10;
144+ case UNW_ARM_R11:
145+ return PERF_REG_ARM_FP;
146+ case UNW_ARM_R12:
147+ return PERF_REG_ARM_IP;
148+ case UNW_ARM_R13:
149+ return PERF_REG_ARM_SP;
150+ case UNW_ARM_R14:
151+ return PERF_REG_ARM_LR;
152+ case UNW_ARM_R15:
153+ return PERF_REG_ARM_PC;
154+ default:
155+ pr_err("unwind: invalid reg id %d\n", regnum);
156+ return -EINVAL;
157+ }
158+
159+ return -EINVAL;
160+}
161--
1621.9.1
163
diff --git a/meta-beagleboard-extras/recipes/linux/linux-mainline_3.8.bbappend b/meta-beagleboard-extras/recipes/linux/linux-mainline_3.8.bbappend
index f91ea8e..54ef15f 100644
--- a/meta-beagleboard-extras/recipes/linux/linux-mainline_3.8.bbappend
+++ b/meta-beagleboard-extras/recipes/linux/linux-mainline_3.8.bbappend
@@ -1,8 +1,11 @@
1
1FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:" 2FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
2SRC_URI += "\ 3SRC_URI += "\
3 file://0001-AM335x-Adding-SGX-DT-node.patch \ 4 file://0001-AM335x-Adding-SGX-DT-node.patch \
4 file://0002-AM33XX-Invoke-hwmod-deassert-for-SGX-graphics-device.patch \ 5 file://0002-AM33XX-Invoke-hwmod-deassert-for-SGX-graphics-device.patch \
5 file://0003-video-da8xx-fb-Add-API-to-register-wait-for-vsync-ca.patch \ 6 file://0003-video-da8xx-fb-Add-API-to-register-wait-for-vsync-ca.patch \
7 file://ARM-perf-add-support-for-perf-registers-API.diff \
8 file://ARM-perf-wire-up-perf_regs-and-unwind-support-for-AR.patch \
6 " 9 "
7 10
8INSANE_SKIP_${PN} = "installed-vs-shipped" 11INSANE_SKIP_${PN} = "installed-vs-shipped"
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2026-08-17 14:40:52 +0000