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From:   Peng Fan <fanpeng@loongson.cn>
To:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
Cc:     Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Dengcheng Zhu <dzhu@wavecomp.com>,
        Paul Burton <paulburton@kernel.org>,
        Ravi Bangoria <ravi.bangoria@linux.ibm.com>,
        Ian Rogers <irogers@google.com>, linux-kernel@vger.kernel.org,
        linux-mips@vger.kernel.org
Subject: [PATCH] perf annotate mips: Add perf arch instructions annotate handlers
Date:   Wed, 23 Sep 2020 18:56:24 +0800
Message-Id: <1600858584-6161-1-git-send-email-fanpeng@loongson.cn>
Precedence: bulk

From: Dengcheng Zhu <dzhu@wavecomp.com>

Support the MIPS architecture using the ins_ops association
method. With this patch, perf-annotate can work well on MIPS.

Testing it with a perf.data file collected on a mips machine:
$./perf annotate -i perf.data

         :           Disassembly of section .text:
         :
         :           00000000000be6a0 <get_next_seq>:
         :           get_next_seq():
    0.00 :   be6a0:       lw      v0,0(a0)
    0.00 :   be6a4:       daddiu  sp,sp,-128
    0.00 :   be6a8:       ld      a7,72(a0)
    0.00 :   be6ac:       gssq    s5,s4,80(sp)
    0.00 :   be6b0:       gssq    s1,s0,48(sp)
    0.00 :   be6b4:       gssq    s8,gp,112(sp)
    0.00 :   be6b8:       gssq    s7,s6,96(sp)
    0.00 :   be6bc:       gssq    s3,s2,64(sp)
    0.00 :   be6c0:       sd      a3,0(sp)
    0.00 :   be6c4:       move    s0,a0
    0.00 :   be6c8:       sd      v0,32(sp)
    0.00 :   be6cc:       sd      a5,8(sp)
    0.00 :   be6d0:       sd      zero,8(a0)
    0.00 :   be6d4:       sd      a6,16(sp)
    0.00 :   be6d8:       ld      s2,48(a0)
    8.53 :   be6dc:       ld      s1,40(a0)
    9.42 :   be6e0:       ld      v1,32(a0)
    0.00 :   be6e4:       nop
    0.00 :   be6e8:       ld      s4,24(a0)
    0.00 :   be6ec:       ld      s5,16(a0)
    0.00 :   be6f0:       sd      a7,40(sp)
   10.11 :   be6f4:       ld      s6,64(a0)
...

The original patch link is:
https://lore.kernel.org/patchwork/patch/1180480/

Signed-off-by: Dengcheng Zhu <dzhu@wavecomp.com>
Signed-off-by: Peng Fan <fanpeng@loongson.cn>
---

Add "bgtzl", "bltzl", "bgezl", "blezl", "beql"
and "bnel", remove "bgtzal", "blezal", "beqzal",
"bnezal" and "jialc". Because these five can not
be found in the instruction manual.

 tools/perf/arch/mips/Build                   |  2 +-
 tools/perf/arch/mips/annotate/instructions.c | 41 ++++++++++++++++++++++++++++
 tools/perf/util/annotate.c                   |  8 ++++++
 3 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 tools/perf/arch/mips/annotate/instructions.c

diff --git a/tools/perf/arch/mips/Build b/tools/perf/arch/mips/Build
index 1bb8bf6..e4e5f33 100644
--- a/tools/perf/arch/mips/Build
+++ b/tools/perf/arch/mips/Build
@@ -1 +1 @@
-# empty
+perf-y += util/
diff --git a/tools/perf/arch/mips/annotate/instructions.c b/tools/perf/arch/mips/annotate/instructions.c
new file mode 100644
index 0000000..8fae8a1
--- /dev/null
+++ b/tools/perf/arch/mips/annotate/instructions.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+
+static
+struct ins_ops *mips__associate_ins_ops(struct arch *arch, const char *name)
+{
+	struct ins_ops *ops = NULL;
+
+	if (!strncmp(name, "bal", 3) ||
+	    !strncmp(name, "bgezal", 6) ||
+	    !strncmp(name, "bltzal", 6) ||
+	    !strncmp(name, "bgtzl", 5) ||
+	    !strncmp(name, "bltzl", 5) ||
+	    !strncmp(name, "bgezl", 5) ||
+	    !strncmp(name, "blezl", 5) ||
+	    !strncmp(name, "beql", 4) ||
+	    !strncmp(name, "bnel", 4) ||
+	    !strncmp(name, "jal", 3))
+		ops = &call_ops;
+	else if (!strncmp(name, "jr", 2))
+		ops = &ret_ops;
+	else if (name[0] == 'j' || name[0] == 'b')
+		ops = &jump_ops;
+	else
+		return NULL;
+
+	arch__associate_ins_ops(arch, name, ops);
+
+	return ops;
+}
+
+static
+int mips__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
+{
+	if (!arch->initialized) {
+		arch->associate_instruction_ops = mips__associate_ins_ops;
+		arch->initialized = true;
+		arch->objdump.comment_char = '#';
+	}
+
+	return 0;
+}
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 0a1fcf7..80a4a3d 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -152,6 +152,7 @@ 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/mips/annotate/instructions.c"
 #include "arch/x86/annotate/instructions.c"
 #include "arch/powerpc/annotate/instructions.c"
 #include "arch/s390/annotate/instructions.c"
@@ -175,6 +176,13 @@ static struct arch architectures[] = {
 		.init = csky__annotate_init,
 	},
 	{
+		.name = "mips",
+		.init = mips__annotate_init,
+		.objdump = {
+			.comment_char = '#',
+		},
+	},
+	{
 		.name = "x86",
 		.init = x86__annotate_init,
 		.instructions = x86__instructions,
-- 
2.1.0