Commit 3213486f authored by Mao Han's avatar Mao Han Committed by Guo Ren
Browse files

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: default avatarMao Han <han_mao@c-sky.com>
Signed-off-by: default avatarGuo 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>
parent 085b7755

tools/arch/csky/include/uapi/asm/perf_regs.h

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+51 −0
Original line number Diff line number Diff line 
/* 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 */

tools/perf/Makefile.config

+5 −1
Original line number Diff line number Diff line
@@ -59,6 +59,10 @@ ifeq ($(SRCARCH),arm64) 
  LIBUNWIND_LIBS = -lunwind -lunwind-aarch64

endif



ifeq ($(SRCARCH),csky)

  NO_PERF_REGS := 0

endif



ifeq ($(ARCH),s390)

  NO_PERF_REGS := 0

  NO_SYSCALL_TABLE := 0
@@ -77,7 +81,7 @@ endif 
# Disable it on all other architectures in case libdw unwind

# support is detected in system. Add supported architectures

# to the check.

ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390))

ifneq ($(SRCARCH),$(filter $(SRCARCH),x86 arm arm64 powerpc s390 csky))

  NO_LIBDW_DWARF_UNWIND := 1

endif

tools/perf/arch/csky/Build

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+1 −0
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perf-y += util/

tools/perf/arch/csky/Makefile

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+3 −0
Original line number Diff line number Diff line 
ifndef NO_DWARF

PERF_HAVE_DWARF_REGS := 1

endif

tools/perf/arch/csky/include/perf_regs.h

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Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.



#ifndef ARCH_PERF_REGS_H

#define ARCH_PERF_REGS_H



#include <stdlib.h>

#include <linux/types.h>

#include <asm/perf_regs.h>



#define PERF_REGS_MASK	((1ULL << PERF_REG_CSKY_MAX) - 1)

#define PERF_REGS_MAX	PERF_REG_CSKY_MAX

#define PERF_SAMPLE_REGS_ABI	PERF_SAMPLE_REGS_ABI_32



#define PERF_REG_IP	PERF_REG_CSKY_PC

#define PERF_REG_SP	PERF_REG_CSKY_SP



static inline const char *perf_reg_name(int id)

{

	switch (id) {

	case PERF_REG_CSKY_A0:

		return "a0";

	case PERF_REG_CSKY_A1:

		return "a1";

	case PERF_REG_CSKY_A2:

		return "a2";

	case PERF_REG_CSKY_A3:

		return "a3";

	case PERF_REG_CSKY_REGS0:

		return "regs0";

	case PERF_REG_CSKY_REGS1:

		return "regs1";

	case PERF_REG_CSKY_REGS2:

		return "regs2";

	case PERF_REG_CSKY_REGS3:

		return "regs3";

	case PERF_REG_CSKY_REGS4:

		return "regs4";

	case PERF_REG_CSKY_REGS5:

		return "regs5";

	case PERF_REG_CSKY_REGS6:

		return "regs6";

	case PERF_REG_CSKY_REGS7:

		return "regs7";

	case PERF_REG_CSKY_REGS8:

		return "regs8";

	case PERF_REG_CSKY_REGS9:

		return "regs9";

	case PERF_REG_CSKY_SP:

		return "sp";

	case PERF_REG_CSKY_LR:

		return "lr";

	case PERF_REG_CSKY_PC:

		return "pc";

#if defined(__CSKYABIV2__)

	case PERF_REG_CSKY_EXREGS0:

		return "exregs0";

	case PERF_REG_CSKY_EXREGS1:

		return "exregs1";

	case PERF_REG_CSKY_EXREGS2:

		return "exregs2";

	case PERF_REG_CSKY_EXREGS3:

		return "exregs3";

	case PERF_REG_CSKY_EXREGS4:

		return "exregs4";

	case PERF_REG_CSKY_EXREGS5:

		return "exregs5";

	case PERF_REG_CSKY_EXREGS6:

		return "exregs6";

	case PERF_REG_CSKY_EXREGS7:

		return "exregs7";

	case PERF_REG_CSKY_EXREGS8:

		return "exregs8";

	case PERF_REG_CSKY_EXREGS9:

		return "exregs9";

	case PERF_REG_CSKY_EXREGS10:

		return "exregs10";

	case PERF_REG_CSKY_EXREGS11:

		return "exregs11";

	case PERF_REG_CSKY_EXREGS12:

		return "exregs12";

	case PERF_REG_CSKY_EXREGS13:

		return "exregs13";

	case PERF_REG_CSKY_EXREGS14:

		return "exregs14";

	case PERF_REG_CSKY_TLS:

		return "tls";

	case PERF_REG_CSKY_HI:

		return "hi";

	case PERF_REG_CSKY_LO:

		return "lo";

#endif

	default:

		return NULL;

	}



	return NULL;

}



#endif /* ARCH_PERF_REGS_H */

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