[PATCH 1/1] perf annotate csky: Add perf annotate support

[Mao Han]

This patch add basic arch initialization and instruction associate support
for csky.

perf annotate --stdio2
Samples: 161  of event 'cpu-clock:pppH', 4000 Hz, Event count (approx.):
40250000, [percent: local period]
test_4() /usr/lib/perf-test/callchain_test
Percent

            Disassembly of section .text:

            00008420 <test_4>:
            test_4():
              subi  sp, sp, 4
              st.w  r8, (sp, 0x0)
              mov   r8, sp
              subi  sp, sp, 8
              subi  r3, r8, 4
              movi  r2, 0
              st.w  r2, (r3, 0x0)
            ↓ br    2e
100.00  14:   subi  r3, r8, 4
              ld.w  r2, (r3, 0x0)
              subi  r3, r8, 8
              st.w  r2, (r3, 0x0)
              subi  r3, r8, 4
              ld.w  r3, (r3, 0x0)
              addi  r2, r3, 1
              subi  r3, r8, 4
              st.w  r2, (r3, 0x0)
        2e:   subi  r3, r8, 4
              ld.w  r2, (r3, 0x0)
              lrw   r3, 0x98967f    // 8598 <main+0x28>
              cmplt r3, r2
            ↑ bf    14
              mov   r0, r0
              mov   r0, r0
              mov   sp, r8
              ld.w  r8, (sp, 0x0)
              addi  sp, sp, 4
            ← rts

Signed-off-by: Mao Han <han_...@c-sky.com>
Cc: Guo Ren <guo...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Arnaldo Carvalho de Melo <a...@kernel.org>
Cc: Alexander Shishkin <alexander.shish...@linux.intel.com>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Namhyung Kim <namhy...@kernel.org>
---
 tools/perf/arch/csky/annotate/instructions.c | 48 ++++++++++++++++++++++++++++
 tools/perf/util/annotate.c                   |  5 +++
 2 files changed, 53 insertions(+)
 create mode 100644 tools/perf/arch/csky/annotate/instructions.c

diff --git a/tools/perf/arch/csky/annotate/instructions.c 
b/tools/perf/arch/csky/annotate/instructions.c
new file mode 100644
index 0000000..5337bfb
--- /dev/null
+++ b/tools/perf/arch/csky/annotate/instructions.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+
+#include <linux/compiler.h>
+
+static struct ins_ops *csky__associate_ins_ops(struct arch *arch,
+                                              const char *name)
+{
+       struct ins_ops *ops = NULL;
+
+       /* catch all kind of jumps */
+       if (!strcmp(name, "bt") ||
+           !strcmp(name, "bf") ||
+           !strcmp(name, "bez") ||
+           !strcmp(name, "bnez") ||
+           !strcmp(name, "bnezad") ||
+           !strcmp(name, "bhsz") ||
+           !strcmp(name, "bhz") ||
+           !strcmp(name, "blsz") ||
+           !strcmp(name, "blz") ||
+           !strcmp(name, "br") ||
+           !strcmp(name, "jmpi") ||
+           !strcmp(name, "jmp"))
+               ops = &jump_ops;
+
+       /* catch function call */
+       if (!strcmp(name, "bsr") ||
+           !strcmp(name, "jsri") ||
+           !strcmp(name, "jsr"))
+               ops = &call_ops;
+
+       /* catch function return */
+       if (!strcmp(name, "rts"))
+               ops = &ret_ops;
+
+       if (ops)
+               arch__associate_ins_ops(arch, name, ops);
+       return ops;
+}
+
+static int csky__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
+{
+       arch->initialized = true;
+       arch->objdump.comment_char = '/';
+       arch->associate_instruction_ops = csky__associate_ins_ops;
+
+       return 0;
+}
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 79db038..eb2456e 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -144,6 +144,7 @@ static int arch__associate_ins_ops(struct arch* arch, const 
char *name, struct i
 #include "arch/arc/annotate/instructions.c"
 #include "arch/arm/annotate/instructions.c"
 #include "arch/arm64/annotate/instructions.c"
+#include "arch/csky/annotate/instructions.c"
 #include "arch/x86/annotate/instructions.c"
 #include "arch/powerpc/annotate/instructions.c"
 #include "arch/s390/annotate/instructions.c"
@@ -163,6 +164,10 @@ static struct arch architectures[] = {
                .init = arm64__annotate_init,
        },
        {
+               .name = "csky",
+               .init = csky__annotate_init,
+       },
+       {
                .name = "x86",
                .init = x86__annotate_init,
                .instructions = x86__instructions,
-- 
2.7.4