csky: Add support for perf unwind-libdw

This patch add support for DWARF register mappings and libdw registers
initialization, which is used by perf callchain analyzing, eg:

perf record --call-graph=dwarf <COMMAND>

Here is elfutils csky backend patch set:
https://sourceware.org/ml/elfutils-devel/2019-q2/msg00007.html

Signed-off-by: Mao Han <han_mao@c-sky.com>
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Arnd Bergmann <arnd@arnd.de>

1 files changed, 51 insertions, 0 deletions

diff --git a/tools/arch/csky/include/uapi/asm/perf_regs.h b/tools/arch/csky/include/uapi/asm/perf_regs.h
new file mode 100644
index 000000000000..ee323d818592
--- /dev/null
+++ b/tools/arch/csky/include/uapi/asm/perf_regs.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+
+#ifndef _ASM_CSKY_PERF_REGS_H
+#define _ASM_CSKY_PERF_REGS_H
+
+/* Index of struct pt_regs */
+enum perf_event_csky_regs {
+        PERF_REG_CSKY_TLS,
+        PERF_REG_CSKY_LR,
+        PERF_REG_CSKY_PC,
+        PERF_REG_CSKY_SR,
+        PERF_REG_CSKY_SP,
+        PERF_REG_CSKY_ORIG_A0,
+        PERF_REG_CSKY_A0,
+        PERF_REG_CSKY_A1,
+        PERF_REG_CSKY_A2,
+        PERF_REG_CSKY_A3,
+        PERF_REG_CSKY_REGS0,
+        PERF_REG_CSKY_REGS1,
+        PERF_REG_CSKY_REGS2,
+        PERF_REG_CSKY_REGS3,
+        PERF_REG_CSKY_REGS4,
+        PERF_REG_CSKY_REGS5,
+        PERF_REG_CSKY_REGS6,
+        PERF_REG_CSKY_REGS7,
+        PERF_REG_CSKY_REGS8,
+        PERF_REG_CSKY_REGS9,
+#if defined(__CSKYABIV2__)
+        PERF_REG_CSKY_EXREGS0,
+        PERF_REG_CSKY_EXREGS1,
+        PERF_REG_CSKY_EXREGS2,
+        PERF_REG_CSKY_EXREGS3,
+        PERF_REG_CSKY_EXREGS4,
+        PERF_REG_CSKY_EXREGS5,
+        PERF_REG_CSKY_EXREGS6,
+        PERF_REG_CSKY_EXREGS7,
+        PERF_REG_CSKY_EXREGS8,
+        PERF_REG_CSKY_EXREGS9,
+        PERF_REG_CSKY_EXREGS10,
+        PERF_REG_CSKY_EXREGS11,
+        PERF_REG_CSKY_EXREGS12,
+        PERF_REG_CSKY_EXREGS13,
+        PERF_REG_CSKY_EXREGS14,
+        PERF_REG_CSKY_HI,
+        PERF_REG_CSKY_LO,
+        PERF_REG_CSKY_DCSR,
+#endif
+        PERF_REG_CSKY_MAX,
+};
+#endif /* _ASM_CSKY_PERF_REGS_H */