[PATCH v2 0/3] Support register names of all architectures

[PATCH v2 0/3] Support register names of all architectures

[German Gomez]

The following changeset applies some corrections to the way system
registers are processed and presented when reading perf.data files using
the various perf tools.

The commit message from [3/3] shows how register names aren't correctly
presented when performing x-arch analysis of perf.data files (recording
in one arch, then reading the file from a different arch).

  - [PATCH 1/3] Fixes a potential out-of-bounds access when reading the
    values of the registers in the perf.data file.
  - [PATCH 2/3] Fixes an issue of ARM and ARM64 registers having the
    same enum name.
  - [PATCH 3/3] Refactors the function "perf_reg_name" declared in the
   "tools/perf/util/perf_regs.h" header, in order to support every arch.

Thanks,
German

--
Changes since v1

  - Added "Reported-by" tags.
  - Removed [PATCH 2/4] because it's not needed (suggested by Athira
    Rajeev).
  - Removed [PATCH 3/4] which created additional header files with the
    register names of every arch.
  - Introduced [PATCH 2/3] to deal with ARM and ARM64 registers having the
    same enum name across "/tools/perf/".
  - Reworked the refactor of "perf_reg_name" function (now implemented in
    perf_regs.c, rather than in the header file) in [PATCH 3/3].

German Gomez (3):
  perf tools: Prevent out-of-bounds access to registers
  perf tools: Rename perf_event_arm_regs for ARM64 registers
  perf tools: Support register names from all archs

 tools/perf/arch/arm/include/perf_regs.h       |  42 --
 tools/perf/arch/arm64/include/perf_regs.h     |  78 +-
 tools/perf/arch/csky/include/perf_regs.h      |  82 ---
 tools/perf/arch/mips/include/perf_regs.h      |  69 --
 tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
 tools/perf/arch/riscv/include/perf_regs.h     |  74 --
 tools/perf/arch/s390/include/perf_regs.h      |  78 --
 tools/perf/arch/x86/include/perf_regs.h       |  82 ---
 tools/perf/builtin-script.c                   |  18 +-
 tools/perf/util/event.h                       |   5 +-
 tools/perf/util/libunwind/arm64.c             |   2 +
 tools/perf/util/perf_regs.c                   | 671 +++++++++++++++++-
 tools/perf/util/perf_regs.h                   |  10 +-
 .../scripting-engines/trace-event-python.c    |  10 +-
 tools/perf/util/session.c                     |  25 +-
 15 files changed, 709 insertions(+), 603 deletions(-)

-- 
2.25.1

[PATCH v2 1/3] perf tools: Prevent out-of-bounds access to registers

[German Gomez]

The size of the cache of register values is arch-dependant
(PERF_REGS_MAX). This has the potential of causing an out-of-bounds
access in the function "perf_reg_value" if the local architecture
contains less registers than the one the perf.data file was recorded on.

Since the maximum number of registers is bound by the bitmask "u64
cache_mask", and the size of the cache when running under x86 systems is
64 already, fix the size to 64 and add a range-check to the function
"perf_reg_value" to prevent out-of-bounds access.

Reported-by: Alexandre Truong <alexandre.truong@arm.com>
Signed-off-by: German Gomez <german.gomez@arm.com>
---
 tools/perf/util/event.h     | 5 ++++-
 tools/perf/util/perf_regs.c | 3 +++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 95ffed663..c59331eea 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -44,13 +44,16 @@ struct perf_event_attr;
 /* perf sample has 16 bits size limit */
 #define PERF_SAMPLE_MAX_SIZE (1 << 16)
 
+/* number of register is bound by the number of bits in regs_dump::mask (64) */
+#define PERF_SAMPLE_REGS_CACHE_SIZE (8 * sizeof(u64))
+
 struct regs_dump {
 	u64 abi;
 	u64 mask;
 	u64 *regs;
 
 	/* Cached values/mask filled by first register access. */
-	u64 cache_regs[PERF_REGS_MAX];
+	u64 cache_regs[PERF_SAMPLE_REGS_CACHE_SIZE];
 	u64 cache_mask;
 };
 
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index 5ee47ae15..06a7461ba 100644
--- a/tools/perf/util/perf_regs.c
+++ b/tools/perf/util/perf_regs.c
@@ -25,6 +25,9 @@ int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
 	int i, idx = 0;
 	u64 mask = regs->mask;
 
+	if ((u64)id >= PERF_SAMPLE_REGS_CACHE_SIZE)
+		return -EINVAL;
+
 	if (regs->cache_mask & (1ULL << id))
 		goto out;
 
-- 
2.25.1

[PATCH v2 2/3] perf tools: Rename perf_event_arm_regs for ARM64 registers

[German Gomez]

The registers for ARM and ARM64 are enumerated using two enums that have
the same name. In order to be able to import both headers, the name of
one can be replaced using the C preprocessor like so:

  #define perf_event_arm_regs perf_event_arm64_regs
  #include <asm/perf_regs.h>
  #undef perf_event_arm_regs

This patch updates all imports of ARM64's perf_regs.h in order to
prevent the naming collision.

Signed-off-by: German Gomez <german.gomez@arm.com>
---
 tools/perf/arch/arm64/include/perf_regs.h | 2 ++
 tools/perf/util/libunwind/arm64.c         | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/tools/perf/arch/arm64/include/perf_regs.h b/tools/perf/arch/arm64/include/perf_regs.h
index fa3e07459..1f0d78b9f 100644
--- a/tools/perf/arch/arm64/include/perf_regs.h
+++ b/tools/perf/arch/arm64/include/perf_regs.h
@@ -4,7 +4,9 @@
 
 #include <stdlib.h>
 #include <linux/types.h>
+#define perf_event_arm_regs perf_event_arm64_regs
 #include <asm/perf_regs.h>
+#undef perf_event_arm_regs
 
 void perf_regs_load(u64 *regs);
 
diff --git a/tools/perf/util/libunwind/arm64.c b/tools/perf/util/libunwind/arm64.c
index c397be0c2..15f60fd09 100644
--- a/tools/perf/util/libunwind/arm64.c
+++ b/tools/perf/util/libunwind/arm64.c
@@ -23,7 +23,9 @@
 
 #include "unwind.h"
 #include "libunwind-aarch64.h"
+#define perf_event_arm_regs perf_event_arm64_regs
 #include <../../../../arch/arm64/include/uapi/asm/perf_regs.h>
+#undef perf_event_arm_regs
 #include "../../arch/arm64/util/unwind-libunwind.c"
 
 /* NO_LIBUNWIND_DEBUG_FRAME is a feature flag for local libunwind,
-- 
2.25.1

[PATCH v2 3/3] perf tools: Support register names from all archs

[German Gomez]

When reading a perf.data file with register values, there is a mismatch
between the names and the values of the registers because the tool is
built using only the register names from the local architecture.

Reading a perf.data file that was recorded on ARM64, gives the following
erroneous output on an X86 machine:

  # perf report -i perf_arm64.data -D
  [...]
  24661932634451 0x698 [0x21d0]: PERF_RECORD_SAMPLE(IP, 0x1): 43239/43239: 0xffffc5be8f100f98 period: 1 addr: 0
  ... user regs: mask 0x1ffffffff ABI 64-bit
  .... AX    0x0000ffffd1515817
  .... BX    0x0000ffffd1515480
  .... CX    0x0000aaaadabf6c80
  .... DX    0x000000000000002e
  .... SI    0x0000000040100401
  .... DI    0x0040600200000080
  .... BP    0x0000ffffd1510e10
  .... SP    0x0000000000000000
  .... IP    0x00000000000000dd
  .... FLAGS 0x0000ffffd1510cd0
  .... CS    0x0000000000000000
  .... SS    0x0000000000000030
  .... DS    0x0000ffffa569a208
  .... ES    0x0000000000000000
  .... FS    0x0000000000000000
  .... GS    0x0000000000000000
  .... R8    0x0000aaaad3de9650
  .... R9    0x0000ffffa57397f0
  .... R10   0x0000000000000001
  .... R11   0x0000ffffa57fd000
  .... R12   0x0000ffffd1515817
  .... R13   0x0000ffffd1515480
  .... R14   0x0000aaaadabf6c80
  .... R15   0x0000000000000000
  .... unknown 0x0000000000000001
  .... unknown 0x0000000000000000
  .... unknown 0x0000000000000000
  .... unknown 0x0000000000000000
  .... unknown 0x0000000000000000
  .... unknown 0x0000ffffd1510d90
  .... unknown 0x0000ffffa5739b90
  .... unknown 0x0000ffffd1510d80
  .... XMM0  0x0000ffffa57392c8
   ... thread: perf-exec:43239
   ...... dso: [kernel.kallsyms]

As can be seen, the register names correspond to X86 registers, even
though the perf.data file was recorded on an ARM64 system. After this
patch, the output of the command displays the correct register names:

  # perf report -i perf_arm64.data -D
  [...]
  24661932634451 0x698 [0x21d0]: PERF_RECORD_SAMPLE(IP, 0x1): 43239/43239: 0xffffc5be8f100f98 period: 1 addr: 0
  ... user regs: mask 0x1ffffffff ABI 64-bit
  .... x0    0x0000ffffd1515817
  .... x1    0x0000ffffd1515480
  .... x2    0x0000aaaadabf6c80
  .... x3    0x000000000000002e
  .... x4    0x0000000040100401
  .... x5    0x0040600200000080
  .... x6    0x0000ffffd1510e10
  .... x7    0x0000000000000000
  .... x8    0x00000000000000dd
  .... x9    0x0000ffffd1510cd0
  .... x10   0x0000000000000000
  .... x11   0x0000000000000030
  .... x12   0x0000ffffa569a208
  .... x13   0x0000000000000000
  .... x14   0x0000000000000000
  .... x15   0x0000000000000000
  .... x16   0x0000aaaad3de9650
  .... x17   0x0000ffffa57397f0
  .... x18   0x0000000000000001
  .... x19   0x0000ffffa57fd000
  .... x20   0x0000ffffd1515817
  .... x21   0x0000ffffd1515480
  .... x22   0x0000aaaadabf6c80
  .... x23   0x0000000000000000
  .... x24   0x0000000000000001
  .... x25   0x0000000000000000
  .... x26   0x0000000000000000
  .... x27   0x0000000000000000
  .... x28   0x0000000000000000
  .... x29   0x0000ffffd1510d90
  .... lr    0x0000ffffa5739b90
  .... sp    0x0000ffffd1510d80
  .... pc    0x0000ffffa57392c8
   ... thread: perf-exec:43239
   ...... dso: [kernel.kallsyms]

Reported-by: Alexandre Truong <alexandre.truong@arm.com>
Signed-off-by: German Gomez <german.gomez@arm.com>
---
 tools/perf/arch/arm/include/perf_regs.h       |  42 --
 tools/perf/arch/arm64/include/perf_regs.h     |  76 --
 tools/perf/arch/csky/include/perf_regs.h      |  82 ---
 tools/perf/arch/mips/include/perf_regs.h      |  69 --
 tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
 tools/perf/arch/riscv/include/perf_regs.h     |  74 --
 tools/perf/arch/s390/include/perf_regs.h      |  78 --
 tools/perf/arch/x86/include/perf_regs.h       |  82 ---
 tools/perf/builtin-script.c                   |  18 +-
 tools/perf/util/perf_regs.c                   | 666 ++++++++++++++++++
 tools/perf/util/perf_regs.h                   |  10 +-
 .../scripting-engines/trace-event-python.c    |  10 +-
 tools/perf/util/session.c                     |  25 +-
 13 files changed, 697 insertions(+), 601 deletions(-)

diff --git a/tools/perf/arch/arm/include/perf_regs.h b/tools/perf/arch/arm/include/perf_regs.h
index 408541928..99a06550e 100644
--- a/tools/perf/arch/arm/include/perf_regs.h
+++ b/tools/perf/arch/arm/include/perf_regs.h
@@ -15,46 +15,4 @@ void perf_regs_load(u64 *regs);
 #define PERF_REG_IP	PERF_REG_ARM_PC
 #define PERF_REG_SP	PERF_REG_ARM_SP
 
-static inline const char *__perf_reg_name(int id)
-{
-	switch (id) {
-	case PERF_REG_ARM_R0:
-		return "r0";
-	case PERF_REG_ARM_R1:
-		return "r1";
-	case PERF_REG_ARM_R2:
-		return "r2";
-	case PERF_REG_ARM_R3:
-		return "r3";
-	case PERF_REG_ARM_R4:
-		return "r4";
-	case PERF_REG_ARM_R5:
-		return "r5";
-	case PERF_REG_ARM_R6:
-		return "r6";
-	case PERF_REG_ARM_R7:
-		return "r7";
-	case PERF_REG_ARM_R8:
-		return "r8";
-	case PERF_REG_ARM_R9:
-		return "r9";
-	case PERF_REG_ARM_R10:
-		return "r10";
-	case PERF_REG_ARM_FP:
-		return "fp";
-	case PERF_REG_ARM_IP:
-		return "ip";
-	case PERF_REG_ARM_SP:
-		return "sp";
-	case PERF_REG_ARM_LR:
-		return "lr";
-	case PERF_REG_ARM_PC:
-		return "pc";
-	default:
-		return NULL;
-	}
-
-	return NULL;
-}
-
 #endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/arm64/include/perf_regs.h b/tools/perf/arch/arm64/include/perf_regs.h
index 1f0d78b9f..35a3cc775 100644
--- a/tools/perf/arch/arm64/include/perf_regs.h
+++ b/tools/perf/arch/arm64/include/perf_regs.h
@@ -17,80 +17,4 @@ void perf_regs_load(u64 *regs);
 #define PERF_REG_IP	PERF_REG_ARM64_PC
 #define PERF_REG_SP	PERF_REG_ARM64_SP
 
-static inline const char *__perf_reg_name(int id)
-{
-	switch (id) {
-	case PERF_REG_ARM64_X0:
-		return "x0";
-	case PERF_REG_ARM64_X1:
-		return "x1";
-	case PERF_REG_ARM64_X2:
-		return "x2";
-	case PERF_REG_ARM64_X3:
-		return "x3";
-	case PERF_REG_ARM64_X4:
-		return "x4";
-	case PERF_REG_ARM64_X5:
-		return "x5";
-	case PERF_REG_ARM64_X6:
-		return "x6";
-	case PERF_REG_ARM64_X7:
-		return "x7";
-	case PERF_REG_ARM64_X8:
-		return "x8";
-	case PERF_REG_ARM64_X9:
-		return "x9";
-	case PERF_REG_ARM64_X10:
-		return "x10";
-	case PERF_REG_ARM64_X11:
-		return "x11";
-	case PERF_REG_ARM64_X12:
-		return "x12";
-	case PERF_REG_ARM64_X13:
-		return "x13";
-	case PERF_REG_ARM64_X14:
-		return "x14";
-	case PERF_REG_ARM64_X15:
-		return "x15";
-	case PERF_REG_ARM64_X16:
-		return "x16";
-	case PERF_REG_ARM64_X17:
-		return "x17";
-	case PERF_REG_ARM64_X18:
-		return "x18";
-	case PERF_REG_ARM64_X19:
-		return "x19";
-	case PERF_REG_ARM64_X20:
-		return "x20";
-	case PERF_REG_ARM64_X21:
-		return "x21";
-	case PERF_REG_ARM64_X22:
-		return "x22";
-	case PERF_REG_ARM64_X23:
-		return "x23";
-	case PERF_REG_ARM64_X24:
-		return "x24";
-	case PERF_REG_ARM64_X25:
-		return "x25";
-	case PERF_REG_ARM64_X26:
-		return "x26";
-	case PERF_REG_ARM64_X27:
-		return "x27";
-	case PERF_REG_ARM64_X28:
-		return "x28";
-	case PERF_REG_ARM64_X29:
-		return "x29";
-	case PERF_REG_ARM64_SP:
-		return "sp";
-	case PERF_REG_ARM64_LR:
-		return "lr";
-	case PERF_REG_ARM64_PC:
-		return "pc";
-	default:
-		return NULL;
-	}
-
-	return NULL;
-}
-
 #endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/csky/include/perf_regs.h b/tools/perf/arch/csky/include/perf_regs.h
index 25ac3bdcb..1afcc0e91 100644
--- a/tools/perf/arch/csky/include/perf_regs.h
+++ b/tools/perf/arch/csky/include/perf_regs.h
@@ -15,86 +15,4 @@
 #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 */
diff --git a/tools/perf/arch/mips/include/perf_regs.h b/tools/perf/arch/mips/include/perf_regs.h
index ee73b36a1..b8cd8bbb3 100644
--- a/tools/perf/arch/mips/include/perf_regs.h
+++ b/tools/perf/arch/mips/include/perf_regs.h
@@ -12,73 +12,4 @@
 
 #define PERF_REGS_MASK ((1ULL << PERF_REG_MIPS_MAX) - 1)
 
-static inline const char *__perf_reg_name(int id)
-{
-	switch (id) {
-	case PERF_REG_MIPS_PC:
-		return "PC";
-	case PERF_REG_MIPS_R1:
-		return "$1";
-	case PERF_REG_MIPS_R2:
-		return "$2";
-	case PERF_REG_MIPS_R3:
-		return "$3";
-	case PERF_REG_MIPS_R4:
-		return "$4";
-	case PERF_REG_MIPS_R5:
-		return "$5";
-	case PERF_REG_MIPS_R6:
-		return "$6";
-	case PERF_REG_MIPS_R7:
-		return "$7";
-	case PERF_REG_MIPS_R8:
-		return "$8";
-	case PERF_REG_MIPS_R9:
-		return "$9";
-	case PERF_REG_MIPS_R10:
-		return "$10";
-	case PERF_REG_MIPS_R11:
-		return "$11";
-	case PERF_REG_MIPS_R12:
-		return "$12";
-	case PERF_REG_MIPS_R13:
-		return "$13";
-	case PERF_REG_MIPS_R14:
-		return "$14";
-	case PERF_REG_MIPS_R15:
-		return "$15";
-	case PERF_REG_MIPS_R16:
-		return "$16";
-	case PERF_REG_MIPS_R17:
-		return "$17";
-	case PERF_REG_MIPS_R18:
-		return "$18";
-	case PERF_REG_MIPS_R19:
-		return "$19";
-	case PERF_REG_MIPS_R20:
-		return "$20";
-	case PERF_REG_MIPS_R21:
-		return "$21";
-	case PERF_REG_MIPS_R22:
-		return "$22";
-	case PERF_REG_MIPS_R23:
-		return "$23";
-	case PERF_REG_MIPS_R24:
-		return "$24";
-	case PERF_REG_MIPS_R25:
-		return "$25";
-	case PERF_REG_MIPS_R28:
-		return "$28";
-	case PERF_REG_MIPS_R29:
-		return "$29";
-	case PERF_REG_MIPS_R30:
-		return "$30";
-	case PERF_REG_MIPS_R31:
-		return "$31";
-	default:
-		break;
-	}
-	return NULL;
-}
-
 #endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/powerpc/include/perf_regs.h b/tools/perf/arch/powerpc/include/perf_regs.h
index 93339d17a..9bb17c3f3 100644
--- a/tools/perf/arch/powerpc/include/perf_regs.h
+++ b/tools/perf/arch/powerpc/include/perf_regs.h
@@ -19,70 +19,4 @@ void perf_regs_load(u64 *regs);
 #define PERF_REG_IP     PERF_REG_POWERPC_NIP
 #define PERF_REG_SP     PERF_REG_POWERPC_R1
 
-static const char *reg_names[] = {
-	[PERF_REG_POWERPC_R0] = "r0",
-	[PERF_REG_POWERPC_R1] = "r1",
-	[PERF_REG_POWERPC_R2] = "r2",
-	[PERF_REG_POWERPC_R3] = "r3",
-	[PERF_REG_POWERPC_R4] = "r4",
-	[PERF_REG_POWERPC_R5] = "r5",
-	[PERF_REG_POWERPC_R6] = "r6",
-	[PERF_REG_POWERPC_R7] = "r7",
-	[PERF_REG_POWERPC_R8] = "r8",
-	[PERF_REG_POWERPC_R9] = "r9",
-	[PERF_REG_POWERPC_R10] = "r10",
-	[PERF_REG_POWERPC_R11] = "r11",
-	[PERF_REG_POWERPC_R12] = "r12",
-	[PERF_REG_POWERPC_R13] = "r13",
-	[PERF_REG_POWERPC_R14] = "r14",
-	[PERF_REG_POWERPC_R15] = "r15",
-	[PERF_REG_POWERPC_R16] = "r16",
-	[PERF_REG_POWERPC_R17] = "r17",
-	[PERF_REG_POWERPC_R18] = "r18",
-	[PERF_REG_POWERPC_R19] = "r19",
-	[PERF_REG_POWERPC_R20] = "r20",
-	[PERF_REG_POWERPC_R21] = "r21",
-	[PERF_REG_POWERPC_R22] = "r22",
-	[PERF_REG_POWERPC_R23] = "r23",
-	[PERF_REG_POWERPC_R24] = "r24",
-	[PERF_REG_POWERPC_R25] = "r25",
-	[PERF_REG_POWERPC_R26] = "r26",
-	[PERF_REG_POWERPC_R27] = "r27",
-	[PERF_REG_POWERPC_R28] = "r28",
-	[PERF_REG_POWERPC_R29] = "r29",
-	[PERF_REG_POWERPC_R30] = "r30",
-	[PERF_REG_POWERPC_R31] = "r31",
-	[PERF_REG_POWERPC_NIP] = "nip",
-	[PERF_REG_POWERPC_MSR] = "msr",
-	[PERF_REG_POWERPC_ORIG_R3] = "orig_r3",
-	[PERF_REG_POWERPC_CTR] = "ctr",
-	[PERF_REG_POWERPC_LINK] = "link",
-	[PERF_REG_POWERPC_XER] = "xer",
-	[PERF_REG_POWERPC_CCR] = "ccr",
-	[PERF_REG_POWERPC_SOFTE] = "softe",
-	[PERF_REG_POWERPC_TRAP] = "trap",
-	[PERF_REG_POWERPC_DAR] = "dar",
-	[PERF_REG_POWERPC_DSISR] = "dsisr",
-	[PERF_REG_POWERPC_SIER] = "sier",
-	[PERF_REG_POWERPC_MMCRA] = "mmcra",
-	[PERF_REG_POWERPC_MMCR0] = "mmcr0",
-	[PERF_REG_POWERPC_MMCR1] = "mmcr1",
-	[PERF_REG_POWERPC_MMCR2] = "mmcr2",
-	[PERF_REG_POWERPC_MMCR3] = "mmcr3",
-	[PERF_REG_POWERPC_SIER2] = "sier2",
-	[PERF_REG_POWERPC_SIER3] = "sier3",
-	[PERF_REG_POWERPC_PMC1] = "pmc1",
-	[PERF_REG_POWERPC_PMC2] = "pmc2",
-	[PERF_REG_POWERPC_PMC3] = "pmc3",
-	[PERF_REG_POWERPC_PMC4] = "pmc4",
-	[PERF_REG_POWERPC_PMC5] = "pmc5",
-	[PERF_REG_POWERPC_PMC6] = "pmc6",
-	[PERF_REG_POWERPC_SDAR] = "sdar",
-	[PERF_REG_POWERPC_SIAR] = "siar",
-};
-
-static inline const char *__perf_reg_name(int id)
-{
-	return reg_names[id];
-}
 #endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/riscv/include/perf_regs.h b/tools/perf/arch/riscv/include/perf_regs.h
index 6b02a767c..6944bf0de 100644
--- a/tools/perf/arch/riscv/include/perf_regs.h
+++ b/tools/perf/arch/riscv/include/perf_regs.h
@@ -19,78 +19,4 @@
 #define PERF_REG_IP	PERF_REG_RISCV_PC
 #define PERF_REG_SP	PERF_REG_RISCV_SP
 
-static inline const char *__perf_reg_name(int id)
-{
-	switch (id) {
-	case PERF_REG_RISCV_PC:
-		return "pc";
-	case PERF_REG_RISCV_RA:
-		return "ra";
-	case PERF_REG_RISCV_SP:
-		return "sp";
-	case PERF_REG_RISCV_GP:
-		return "gp";
-	case PERF_REG_RISCV_TP:
-		return "tp";
-	case PERF_REG_RISCV_T0:
-		return "t0";
-	case PERF_REG_RISCV_T1:
-		return "t1";
-	case PERF_REG_RISCV_T2:
-		return "t2";
-	case PERF_REG_RISCV_S0:
-		return "s0";
-	case PERF_REG_RISCV_S1:
-		return "s1";
-	case PERF_REG_RISCV_A0:
-		return "a0";
-	case PERF_REG_RISCV_A1:
-		return "a1";
-	case PERF_REG_RISCV_A2:
-		return "a2";
-	case PERF_REG_RISCV_A3:
-		return "a3";
-	case PERF_REG_RISCV_A4:
-		return "a4";
-	case PERF_REG_RISCV_A5:
-		return "a5";
-	case PERF_REG_RISCV_A6:
-		return "a6";
-	case PERF_REG_RISCV_A7:
-		return "a7";
-	case PERF_REG_RISCV_S2:
-		return "s2";
-	case PERF_REG_RISCV_S3:
-		return "s3";
-	case PERF_REG_RISCV_S4:
-		return "s4";
-	case PERF_REG_RISCV_S5:
-		return "s5";
-	case PERF_REG_RISCV_S6:
-		return "s6";
-	case PERF_REG_RISCV_S7:
-		return "s7";
-	case PERF_REG_RISCV_S8:
-		return "s8";
-	case PERF_REG_RISCV_S9:
-		return "s9";
-	case PERF_REG_RISCV_S10:
-		return "s10";
-	case PERF_REG_RISCV_S11:
-		return "s11";
-	case PERF_REG_RISCV_T3:
-		return "t3";
-	case PERF_REG_RISCV_T4:
-		return "t4";
-	case PERF_REG_RISCV_T5:
-		return "t5";
-	case PERF_REG_RISCV_T6:
-		return "t6";
-	default:
-		return NULL;
-	}
-
-	return NULL;
-}
-
 #endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/s390/include/perf_regs.h b/tools/perf/arch/s390/include/perf_regs.h
index ce3031526..52fcc0891 100644
--- a/tools/perf/arch/s390/include/perf_regs.h
+++ b/tools/perf/arch/s390/include/perf_regs.h
@@ -14,82 +14,4 @@ void perf_regs_load(u64 *regs);
 #define PERF_REG_IP PERF_REG_S390_PC
 #define PERF_REG_SP PERF_REG_S390_R15
 
-static inline const char *__perf_reg_name(int id)
-{
-	switch (id) {
-	case PERF_REG_S390_R0:
-		return "R0";
-	case PERF_REG_S390_R1:
-		return "R1";
-	case PERF_REG_S390_R2:
-		return "R2";
-	case PERF_REG_S390_R3:
-		return "R3";
-	case PERF_REG_S390_R4:
-		return "R4";
-	case PERF_REG_S390_R5:
-		return "R5";
-	case PERF_REG_S390_R6:
-		return "R6";
-	case PERF_REG_S390_R7:
-		return "R7";
-	case PERF_REG_S390_R8:
-		return "R8";
-	case PERF_REG_S390_R9:
-		return "R9";
-	case PERF_REG_S390_R10:
-		return "R10";
-	case PERF_REG_S390_R11:
-		return "R11";
-	case PERF_REG_S390_R12:
-		return "R12";
-	case PERF_REG_S390_R13:
-		return "R13";
-	case PERF_REG_S390_R14:
-		return "R14";
-	case PERF_REG_S390_R15:
-		return "R15";
-	case PERF_REG_S390_FP0:
-		return "FP0";
-	case PERF_REG_S390_FP1:
-		return "FP1";
-	case PERF_REG_S390_FP2:
-		return "FP2";
-	case PERF_REG_S390_FP3:
-		return "FP3";
-	case PERF_REG_S390_FP4:
-		return "FP4";
-	case PERF_REG_S390_FP5:
-		return "FP5";
-	case PERF_REG_S390_FP6:
-		return "FP6";
-	case PERF_REG_S390_FP7:
-		return "FP7";
-	case PERF_REG_S390_FP8:
-		return "FP8";
-	case PERF_REG_S390_FP9:
-		return "FP9";
-	case PERF_REG_S390_FP10:
-		return "FP10";
-	case PERF_REG_S390_FP11:
-		return "FP11";
-	case PERF_REG_S390_FP12:
-		return "FP12";
-	case PERF_REG_S390_FP13:
-		return "FP13";
-	case PERF_REG_S390_FP14:
-		return "FP14";
-	case PERF_REG_S390_FP15:
-		return "FP15";
-	case PERF_REG_S390_MASK:
-		return "MASK";
-	case PERF_REG_S390_PC:
-		return "PC";
-	default:
-		return NULL;
-	}
-
-	return NULL;
-}
-
 #endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/x86/include/perf_regs.h b/tools/perf/arch/x86/include/perf_regs.h
index cddc4cdc0..16e23b722 100644
--- a/tools/perf/arch/x86/include/perf_regs.h
+++ b/tools/perf/arch/x86/include/perf_regs.h
@@ -23,86 +23,4 @@ void perf_regs_load(u64 *regs);
 #define PERF_REG_IP PERF_REG_X86_IP
 #define PERF_REG_SP PERF_REG_X86_SP
 
-static inline const char *__perf_reg_name(int id)
-{
-	switch (id) {
-	case PERF_REG_X86_AX:
-		return "AX";
-	case PERF_REG_X86_BX:
-		return "BX";
-	case PERF_REG_X86_CX:
-		return "CX";
-	case PERF_REG_X86_DX:
-		return "DX";
-	case PERF_REG_X86_SI:
-		return "SI";
-	case PERF_REG_X86_DI:
-		return "DI";
-	case PERF_REG_X86_BP:
-		return "BP";
-	case PERF_REG_X86_SP:
-		return "SP";
-	case PERF_REG_X86_IP:
-		return "IP";
-	case PERF_REG_X86_FLAGS:
-		return "FLAGS";
-	case PERF_REG_X86_CS:
-		return "CS";
-	case PERF_REG_X86_SS:
-		return "SS";
-	case PERF_REG_X86_DS:
-		return "DS";
-	case PERF_REG_X86_ES:
-		return "ES";
-	case PERF_REG_X86_FS:
-		return "FS";
-	case PERF_REG_X86_GS:
-		return "GS";
-#ifdef HAVE_ARCH_X86_64_SUPPORT
-	case PERF_REG_X86_R8:
-		return "R8";
-	case PERF_REG_X86_R9:
-		return "R9";
-	case PERF_REG_X86_R10:
-		return "R10";
-	case PERF_REG_X86_R11:
-		return "R11";
-	case PERF_REG_X86_R12:
-		return "R12";
-	case PERF_REG_X86_R13:
-		return "R13";
-	case PERF_REG_X86_R14:
-		return "R14";
-	case PERF_REG_X86_R15:
-		return "R15";
-#endif /* HAVE_ARCH_X86_64_SUPPORT */
-
-#define XMM(x) \
-	case PERF_REG_X86_XMM ## x:	\
-	case PERF_REG_X86_XMM ## x + 1:	\
-		return "XMM" #x;
-	XMM(0)
-	XMM(1)
-	XMM(2)
-	XMM(3)
-	XMM(4)
-	XMM(5)
-	XMM(6)
-	XMM(7)
-	XMM(8)
-	XMM(9)
-	XMM(10)
-	XMM(11)
-	XMM(12)
-	XMM(13)
-	XMM(14)
-	XMM(15)
-#undef XMM
-	default:
-		return NULL;
-	}
-
-	return NULL;
-}
-
 #endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 9434367af..da2175d70 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -15,6 +15,7 @@
 #include "util/symbol.h"
 #include "util/thread.h"
 #include "util/trace-event.h"
+#include "util/env.h"
 #include "util/evlist.h"
 #include "util/evsel.h"
 #include "util/evsel_fprintf.h"
@@ -648,7 +649,7 @@ static int perf_session__check_output_opt(struct perf_session *session)
 	return 0;
 }
 
-static int perf_sample__fprintf_regs(struct regs_dump *regs, uint64_t mask,
+static int perf_sample__fprintf_regs(struct regs_dump *regs, uint64_t mask, const char *arch,
 				     FILE *fp)
 {
 	unsigned i = 0, r;
@@ -661,7 +662,7 @@ static int perf_sample__fprintf_regs(struct regs_dump *regs, uint64_t mask,
 
 	for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
 		u64 val = regs->regs[i++];
-		printed += fprintf(fp, "%5s:0x%"PRIx64" ", perf_reg_name(r), val);
+		printed += fprintf(fp, "%5s:0x%"PRIx64" ", perf_reg_name(r, arch), val);
 	}
 
 	return printed;
@@ -718,17 +719,17 @@ tod_scnprintf(struct perf_script *script, char *buf, int buflen,
 }
 
 static int perf_sample__fprintf_iregs(struct perf_sample *sample,
-				      struct perf_event_attr *attr, FILE *fp)
+				      struct perf_event_attr *attr, const char *arch, FILE *fp)
 {
 	return perf_sample__fprintf_regs(&sample->intr_regs,
-					 attr->sample_regs_intr, fp);
+					 attr->sample_regs_intr, arch, fp);
 }
 
 static int perf_sample__fprintf_uregs(struct perf_sample *sample,
-				      struct perf_event_attr *attr, FILE *fp)
+				      struct perf_event_attr *attr, const char *arch, FILE *fp)
 {
 	return perf_sample__fprintf_regs(&sample->user_regs,
-					 attr->sample_regs_user, fp);
+					 attr->sample_regs_user, arch, fp);
 }
 
 static int perf_sample__fprintf_start(struct perf_script *script,
@@ -2000,6 +2001,7 @@ static void process_event(struct perf_script *script,
 	struct evsel_script *es = evsel->priv;
 	FILE *fp = es->fp;
 	char str[PAGE_SIZE_NAME_LEN];
+	const char *arch = perf_env__arch(machine->env);
 
 	if (output[type].fields == 0)
 		return;
@@ -2066,10 +2068,10 @@ static void process_event(struct perf_script *script,
 	}
 
 	if (PRINT_FIELD(IREGS))
-		perf_sample__fprintf_iregs(sample, attr, fp);
+		perf_sample__fprintf_iregs(sample, attr, arch, fp);
 
 	if (PRINT_FIELD(UREGS))
-		perf_sample__fprintf_uregs(sample, attr, fp);
+		perf_sample__fprintf_uregs(sample, attr, arch, fp);
 
 	if (PRINT_FIELD(BRSTACK))
 		perf_sample__fprintf_brstack(sample, thread, attr, fp);
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index 06a7461ba..a982e40ee 100644
--- a/tools/perf/util/perf_regs.c
+++ b/tools/perf/util/perf_regs.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <errno.h>
+#include <string.h>
 #include "perf_regs.h"
 #include "event.h"
 
@@ -20,6 +21,671 @@ uint64_t __weak arch__user_reg_mask(void)
 }
 
 #ifdef HAVE_PERF_REGS_SUPPORT
+
+#define perf_event_arm_regs perf_event_arm64_regs
+#include "../../arch/arm64/include/uapi/asm/perf_regs.h"
+#undef perf_event_arm_regs
+
+#include "../../arch/arm/include/uapi/asm/perf_regs.h"
+#include "../../arch/csky/include/uapi/asm/perf_regs.h"
+#include "../../arch/mips/include/uapi/asm/perf_regs.h"
+#include "../../arch/powerpc/include/uapi/asm/perf_regs.h"
+#include "../../arch/riscv/include/uapi/asm/perf_regs.h"
+#include "../../arch/s390/include/uapi/asm/perf_regs.h"
+#include "../../arch/x86/include/uapi/asm/perf_regs.h"
+
+static const char *__perf_reg_name_arm64(int id)
+{
+	switch (id) {
+	case PERF_REG_ARM64_X0:
+		return "x0";
+	case PERF_REG_ARM64_X1:
+		return "x1";
+	case PERF_REG_ARM64_X2:
+		return "x2";
+	case PERF_REG_ARM64_X3:
+		return "x3";
+	case PERF_REG_ARM64_X4:
+		return "x4";
+	case PERF_REG_ARM64_X5:
+		return "x5";
+	case PERF_REG_ARM64_X6:
+		return "x6";
+	case PERF_REG_ARM64_X7:
+		return "x7";
+	case PERF_REG_ARM64_X8:
+		return "x8";
+	case PERF_REG_ARM64_X9:
+		return "x9";
+	case PERF_REG_ARM64_X10:
+		return "x10";
+	case PERF_REG_ARM64_X11:
+		return "x11";
+	case PERF_REG_ARM64_X12:
+		return "x12";
+	case PERF_REG_ARM64_X13:
+		return "x13";
+	case PERF_REG_ARM64_X14:
+		return "x14";
+	case PERF_REG_ARM64_X15:
+		return "x15";
+	case PERF_REG_ARM64_X16:
+		return "x16";
+	case PERF_REG_ARM64_X17:
+		return "x17";
+	case PERF_REG_ARM64_X18:
+		return "x18";
+	case PERF_REG_ARM64_X19:
+		return "x19";
+	case PERF_REG_ARM64_X20:
+		return "x20";
+	case PERF_REG_ARM64_X21:
+		return "x21";
+	case PERF_REG_ARM64_X22:
+		return "x22";
+	case PERF_REG_ARM64_X23:
+		return "x23";
+	case PERF_REG_ARM64_X24:
+		return "x24";
+	case PERF_REG_ARM64_X25:
+		return "x25";
+	case PERF_REG_ARM64_X26:
+		return "x26";
+	case PERF_REG_ARM64_X27:
+		return "x27";
+	case PERF_REG_ARM64_X28:
+		return "x28";
+	case PERF_REG_ARM64_X29:
+		return "x29";
+	case PERF_REG_ARM64_SP:
+		return "sp";
+	case PERF_REG_ARM64_LR:
+		return "lr";
+	case PERF_REG_ARM64_PC:
+		return "pc";
+	default:
+		return NULL;
+	}
+
+	return NULL;
+}
+
+static const char *__perf_reg_name_arm(int id)
+{
+	switch (id) {
+	case PERF_REG_ARM_R0:
+		return "r0";
+	case PERF_REG_ARM_R1:
+		return "r1";
+	case PERF_REG_ARM_R2:
+		return "r2";
+	case PERF_REG_ARM_R3:
+		return "r3";
+	case PERF_REG_ARM_R4:
+		return "r4";
+	case PERF_REG_ARM_R5:
+		return "r5";
+	case PERF_REG_ARM_R6:
+		return "r6";
+	case PERF_REG_ARM_R7:
+		return "r7";
+	case PERF_REG_ARM_R8:
+		return "r8";
+	case PERF_REG_ARM_R9:
+		return "r9";
+	case PERF_REG_ARM_R10:
+		return "r10";
+	case PERF_REG_ARM_FP:
+		return "fp";
+	case PERF_REG_ARM_IP:
+		return "ip";
+	case PERF_REG_ARM_SP:
+		return "sp";
+	case PERF_REG_ARM_LR:
+		return "lr";
+	case PERF_REG_ARM_PC:
+		return "pc";
+	default:
+		return NULL;
+	}
+
+	return NULL;
+}
+
+static const char *__perf_reg_name_csky(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;
+}
+
+static const char *__perf_reg_name_mips(int id)
+{
+	switch (id) {
+	case PERF_REG_MIPS_PC:
+		return "PC";
+	case PERF_REG_MIPS_R1:
+		return "$1";
+	case PERF_REG_MIPS_R2:
+		return "$2";
+	case PERF_REG_MIPS_R3:
+		return "$3";
+	case PERF_REG_MIPS_R4:
+		return "$4";
+	case PERF_REG_MIPS_R5:
+		return "$5";
+	case PERF_REG_MIPS_R6:
+		return "$6";
+	case PERF_REG_MIPS_R7:
+		return "$7";
+	case PERF_REG_MIPS_R8:
+		return "$8";
+	case PERF_REG_MIPS_R9:
+		return "$9";
+	case PERF_REG_MIPS_R10:
+		return "$10";
+	case PERF_REG_MIPS_R11:
+		return "$11";
+	case PERF_REG_MIPS_R12:
+		return "$12";
+	case PERF_REG_MIPS_R13:
+		return "$13";
+	case PERF_REG_MIPS_R14:
+		return "$14";
+	case PERF_REG_MIPS_R15:
+		return "$15";
+	case PERF_REG_MIPS_R16:
+		return "$16";
+	case PERF_REG_MIPS_R17:
+		return "$17";
+	case PERF_REG_MIPS_R18:
+		return "$18";
+	case PERF_REG_MIPS_R19:
+		return "$19";
+	case PERF_REG_MIPS_R20:
+		return "$20";
+	case PERF_REG_MIPS_R21:
+		return "$21";
+	case PERF_REG_MIPS_R22:
+		return "$22";
+	case PERF_REG_MIPS_R23:
+		return "$23";
+	case PERF_REG_MIPS_R24:
+		return "$24";
+	case PERF_REG_MIPS_R25:
+		return "$25";
+	case PERF_REG_MIPS_R28:
+		return "$28";
+	case PERF_REG_MIPS_R29:
+		return "$29";
+	case PERF_REG_MIPS_R30:
+		return "$30";
+	case PERF_REG_MIPS_R31:
+		return "$31";
+	default:
+		break;
+	}
+	return NULL;
+}
+
+static const char *__perf_reg_name_powerpc(int id)
+{
+	switch (id) {
+	case PERF_REG_POWERPC_R0:
+		return "r0";
+	case PERF_REG_POWERPC_R1:
+		return "r1";
+	case PERF_REG_POWERPC_R2:
+		return "r2";
+	case PERF_REG_POWERPC_R3:
+		return "r3";
+	case PERF_REG_POWERPC_R4:
+		return "r4";
+	case PERF_REG_POWERPC_R5:
+		return "r5";
+	case PERF_REG_POWERPC_R6:
+		return "r6";
+	case PERF_REG_POWERPC_R7:
+		return "r7";
+	case PERF_REG_POWERPC_R8:
+		return "r8";
+	case PERF_REG_POWERPC_R9:
+		return "r9";
+	case PERF_REG_POWERPC_R10:
+		return "r10";
+	case PERF_REG_POWERPC_R11:
+		return "r11";
+	case PERF_REG_POWERPC_R12:
+		return "r12";
+	case PERF_REG_POWERPC_R13:
+		return "r13";
+	case PERF_REG_POWERPC_R14:
+		return "r14";
+	case PERF_REG_POWERPC_R15:
+		return "r15";
+	case PERF_REG_POWERPC_R16:
+		return "r16";
+	case PERF_REG_POWERPC_R17:
+		return "r17";
+	case PERF_REG_POWERPC_R18:
+		return "r18";
+	case PERF_REG_POWERPC_R19:
+		return "r19";
+	case PERF_REG_POWERPC_R20:
+		return "r20";
+	case PERF_REG_POWERPC_R21:
+		return "r21";
+	case PERF_REG_POWERPC_R22:
+		return "r22";
+	case PERF_REG_POWERPC_R23:
+		return "r23";
+	case PERF_REG_POWERPC_R24:
+		return "r24";
+	case PERF_REG_POWERPC_R25:
+		return "r25";
+	case PERF_REG_POWERPC_R26:
+		return "r26";
+	case PERF_REG_POWERPC_R27:
+		return "r27";
+	case PERF_REG_POWERPC_R28:
+		return "r28";
+	case PERF_REG_POWERPC_R29:
+		return "r29";
+	case PERF_REG_POWERPC_R30:
+		return "r30";
+	case PERF_REG_POWERPC_R31:
+		return "r31";
+	case PERF_REG_POWERPC_NIP:
+		return "nip";
+	case PERF_REG_POWERPC_MSR:
+		return "msr";
+	case PERF_REG_POWERPC_ORIG_R3:
+		return "orig_r3";
+	case PERF_REG_POWERPC_CTR:
+		return "ctr";
+	case PERF_REG_POWERPC_LINK:
+		return "link";
+	case PERF_REG_POWERPC_XER:
+		return "xer";
+	case PERF_REG_POWERPC_CCR:
+		return "ccr";
+	case PERF_REG_POWERPC_SOFTE:
+		return "softe";
+	case PERF_REG_POWERPC_TRAP:
+		return "trap";
+	case PERF_REG_POWERPC_DAR:
+		return "dar";
+	case PERF_REG_POWERPC_DSISR:
+		return "dsisr";
+	case PERF_REG_POWERPC_SIER:
+		return "sier";
+	case PERF_REG_POWERPC_MMCRA:
+		return "mmcra";
+	case PERF_REG_POWERPC_MMCR0:
+		return "mmcr0";
+	case PERF_REG_POWERPC_MMCR1:
+		return "mmcr1";
+	case PERF_REG_POWERPC_MMCR2:
+		return "mmcr2";
+	case PERF_REG_POWERPC_MMCR3:
+		return "mmcr3";
+	case PERF_REG_POWERPC_SIER2:
+		return "sier2";
+	case PERF_REG_POWERPC_SIER3:
+		return "sier3";
+	case PERF_REG_POWERPC_PMC1:
+		return "pmc1";
+	case PERF_REG_POWERPC_PMC2:
+		return "pmc2";
+	case PERF_REG_POWERPC_PMC3:
+		return "pmc3";
+	case PERF_REG_POWERPC_PMC4:
+		return "pmc4";
+	case PERF_REG_POWERPC_PMC5:
+		return "pmc5";
+	case PERF_REG_POWERPC_PMC6:
+		return "pmc6";
+	case PERF_REG_POWERPC_SDAR:
+		return "sdar";
+	case PERF_REG_POWERPC_SIAR:
+		return "siar";
+	default:
+		break;
+	}
+	return NULL;
+}
+
+static const char *__perf_reg_name_riscv(int id)
+{
+	switch (id) {
+	case PERF_REG_RISCV_PC:
+		return "pc";
+	case PERF_REG_RISCV_RA:
+		return "ra";
+	case PERF_REG_RISCV_SP:
+		return "sp";
+	case PERF_REG_RISCV_GP:
+		return "gp";
+	case PERF_REG_RISCV_TP:
+		return "tp";
+	case PERF_REG_RISCV_T0:
+		return "t0";
+	case PERF_REG_RISCV_T1:
+		return "t1";
+	case PERF_REG_RISCV_T2:
+		return "t2";
+	case PERF_REG_RISCV_S0:
+		return "s0";
+	case PERF_REG_RISCV_S1:
+		return "s1";
+	case PERF_REG_RISCV_A0:
+		return "a0";
+	case PERF_REG_RISCV_A1:
+		return "a1";
+	case PERF_REG_RISCV_A2:
+		return "a2";
+	case PERF_REG_RISCV_A3:
+		return "a3";
+	case PERF_REG_RISCV_A4:
+		return "a4";
+	case PERF_REG_RISCV_A5:
+		return "a5";
+	case PERF_REG_RISCV_A6:
+		return "a6";
+	case PERF_REG_RISCV_A7:
+		return "a7";
+	case PERF_REG_RISCV_S2:
+		return "s2";
+	case PERF_REG_RISCV_S3:
+		return "s3";
+	case PERF_REG_RISCV_S4:
+		return "s4";
+	case PERF_REG_RISCV_S5:
+		return "s5";
+	case PERF_REG_RISCV_S6:
+		return "s6";
+	case PERF_REG_RISCV_S7:
+		return "s7";
+	case PERF_REG_RISCV_S8:
+		return "s8";
+	case PERF_REG_RISCV_S9:
+		return "s9";
+	case PERF_REG_RISCV_S10:
+		return "s10";
+	case PERF_REG_RISCV_S11:
+		return "s11";
+	case PERF_REG_RISCV_T3:
+		return "t3";
+	case PERF_REG_RISCV_T4:
+		return "t4";
+	case PERF_REG_RISCV_T5:
+		return "t5";
+	case PERF_REG_RISCV_T6:
+		return "t6";
+	default:
+		return NULL;
+	}
+
+	return NULL;
+}
+
+static const char *__perf_reg_name_s390(int id)
+{
+	switch (id) {
+	case PERF_REG_S390_R0:
+		return "R0";
+	case PERF_REG_S390_R1:
+		return "R1";
+	case PERF_REG_S390_R2:
+		return "R2";
+	case PERF_REG_S390_R3:
+		return "R3";
+	case PERF_REG_S390_R4:
+		return "R4";
+	case PERF_REG_S390_R5:
+		return "R5";
+	case PERF_REG_S390_R6:
+		return "R6";
+	case PERF_REG_S390_R7:
+		return "R7";
+	case PERF_REG_S390_R8:
+		return "R8";
+	case PERF_REG_S390_R9:
+		return "R9";
+	case PERF_REG_S390_R10:
+		return "R10";
+	case PERF_REG_S390_R11:
+		return "R11";
+	case PERF_REG_S390_R12:
+		return "R12";
+	case PERF_REG_S390_R13:
+		return "R13";
+	case PERF_REG_S390_R14:
+		return "R14";
+	case PERF_REG_S390_R15:
+		return "R15";
+	case PERF_REG_S390_FP0:
+		return "FP0";
+	case PERF_REG_S390_FP1:
+		return "FP1";
+	case PERF_REG_S390_FP2:
+		return "FP2";
+	case PERF_REG_S390_FP3:
+		return "FP3";
+	case PERF_REG_S390_FP4:
+		return "FP4";
+	case PERF_REG_S390_FP5:
+		return "FP5";
+	case PERF_REG_S390_FP6:
+		return "FP6";
+	case PERF_REG_S390_FP7:
+		return "FP7";
+	case PERF_REG_S390_FP8:
+		return "FP8";
+	case PERF_REG_S390_FP9:
+		return "FP9";
+	case PERF_REG_S390_FP10:
+		return "FP10";
+	case PERF_REG_S390_FP11:
+		return "FP11";
+	case PERF_REG_S390_FP12:
+		return "FP12";
+	case PERF_REG_S390_FP13:
+		return "FP13";
+	case PERF_REG_S390_FP14:
+		return "FP14";
+	case PERF_REG_S390_FP15:
+		return "FP15";
+	case PERF_REG_S390_MASK:
+		return "MASK";
+	case PERF_REG_S390_PC:
+		return "PC";
+	default:
+		return NULL;
+	}
+
+	return NULL;
+}
+
+static const char *__perf_reg_name_x86(int id)
+{
+	switch (id) {
+	case PERF_REG_X86_AX:
+		return "AX";
+	case PERF_REG_X86_BX:
+		return "BX";
+	case PERF_REG_X86_CX:
+		return "CX";
+	case PERF_REG_X86_DX:
+		return "DX";
+	case PERF_REG_X86_SI:
+		return "SI";
+	case PERF_REG_X86_DI:
+		return "DI";
+	case PERF_REG_X86_BP:
+		return "BP";
+	case PERF_REG_X86_SP:
+		return "SP";
+	case PERF_REG_X86_IP:
+		return "IP";
+	case PERF_REG_X86_FLAGS:
+		return "FLAGS";
+	case PERF_REG_X86_CS:
+		return "CS";
+	case PERF_REG_X86_SS:
+		return "SS";
+	case PERF_REG_X86_DS:
+		return "DS";
+	case PERF_REG_X86_ES:
+		return "ES";
+	case PERF_REG_X86_FS:
+		return "FS";
+	case PERF_REG_X86_GS:
+		return "GS";
+	case PERF_REG_X86_R8:
+		return "R8";
+	case PERF_REG_X86_R9:
+		return "R9";
+	case PERF_REG_X86_R10:
+		return "R10";
+	case PERF_REG_X86_R11:
+		return "R11";
+	case PERF_REG_X86_R12:
+		return "R12";
+	case PERF_REG_X86_R13:
+		return "R13";
+	case PERF_REG_X86_R14:
+		return "R14";
+	case PERF_REG_X86_R15:
+		return "R15";
+
+#define XMM(x) \
+	case PERF_REG_X86_XMM ## x:	\
+	case PERF_REG_X86_XMM ## x + 1:	\
+		return "XMM" #x;
+	XMM(0)
+	XMM(1)
+	XMM(2)
+	XMM(3)
+	XMM(4)
+	XMM(5)
+	XMM(6)
+	XMM(7)
+	XMM(8)
+	XMM(9)
+	XMM(10)
+	XMM(11)
+	XMM(12)
+	XMM(13)
+	XMM(14)
+	XMM(15)
+#undef XMM
+	default:
+		return NULL;
+	}
+
+	return NULL;
+}
+
+const char *perf_reg_name(int id, const char *arch)
+{
+	const char *reg_name = NULL;
+
+	if (!strcmp(arch, "csky"))
+		reg_name = __perf_reg_name_csky(id);
+	else if (!strcmp(arch, "mips"))
+		reg_name = __perf_reg_name_mips(id);
+	else if (!strcmp(arch, "powerpc"))
+		reg_name = __perf_reg_name_powerpc(id);
+	else if (!strcmp(arch, "riscv"))
+		reg_name = __perf_reg_name_riscv(id);
+	else if (!strcmp(arch, "s390"))
+		reg_name = __perf_reg_name_s390(id);
+	else if (!strcmp(arch, "x86"))
+		reg_name = __perf_reg_name_x86(id);
+	else if (!strcmp(arch, "arm"))
+		reg_name = __perf_reg_name_arm(id);
+	else if (!strcmp(arch, "arm64"))
+		reg_name = __perf_reg_name_arm64(id);
+
+	return reg_name ?: "unknown";
+}
+
 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
 {
 	int i, idx = 0;
diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h
index eeac181eb..4e6b1299c 100644
--- a/tools/perf/util/perf_regs.h
+++ b/tools/perf/util/perf_regs.h
@@ -31,22 +31,16 @@ extern const struct sample_reg sample_reg_masks[];
 
 #define DWARF_MINIMAL_REGS ((1ULL << PERF_REG_IP) | (1ULL << PERF_REG_SP))
 
+const char *perf_reg_name(int id, const char *arch);
 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id);
 
-static inline const char *perf_reg_name(int id)
-{
-	const char *reg_name = __perf_reg_name(id);
-
-	return reg_name ?: "unknown";
-}
-
 #else
 #define PERF_REGS_MASK	0
 #define PERF_REGS_MAX	0
 
 #define DWARF_MINIMAL_REGS PERF_REGS_MASK
 
-static inline const char *perf_reg_name(int id __maybe_unused)
+static inline const char *perf_reg_name(int id __maybe_unused, const char *arch __maybe_unused)
 {
 	return "unknown";
 }
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index c0c010350..0445bee92 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -36,6 +36,7 @@
 #include "../debug.h"
 #include "../dso.h"
 #include "../callchain.h"
+#include "../env.h"
 #include "../evsel.h"
 #include "../event.h"
 #include "../thread.h"
@@ -687,7 +688,7 @@ static void set_sample_datasrc_in_dict(PyObject *dict,
 			_PyUnicode_FromString(decode));
 }
 
-static void regs_map(struct regs_dump *regs, uint64_t mask, char *bf, int size)
+static void regs_map(struct regs_dump *regs, uint64_t mask, const char *arch, char *bf, int size)
 {
 	unsigned int i = 0, r;
 	int printed = 0;
@@ -702,7 +703,7 @@ static void regs_map(struct regs_dump *regs, uint64_t mask, char *bf, int size)
 
 		printed += scnprintf(bf + printed, size - printed,
 				     "%5s:0x%" PRIx64 " ",
-				     perf_reg_name(r), val);
+				     perf_reg_name(r, arch), val);
 	}
 }
 
@@ -711,6 +712,7 @@ static void set_regs_in_dict(PyObject *dict,
 			     struct evsel *evsel)
 {
 	struct perf_event_attr *attr = &evsel->core.attr;
+	const char *arch = perf_env__arch(evsel__env(evsel));
 
 	/*
 	 * Here value 28 is a constant size which can be used to print
@@ -722,12 +724,12 @@ static void set_regs_in_dict(PyObject *dict,
 	int size = __sw_hweight64(attr->sample_regs_intr) * 28;
 	char bf[size];
 
-	regs_map(&sample->intr_regs, attr->sample_regs_intr, bf, sizeof(bf));
+	regs_map(&sample->intr_regs, attr->sample_regs_intr, arch, bf, sizeof(bf));
 
 	pydict_set_item_string_decref(dict, "iregs",
 			_PyUnicode_FromString(bf));
 
-	regs_map(&sample->user_regs, attr->sample_regs_user, bf, sizeof(bf));
+	regs_map(&sample->user_regs, attr->sample_regs_user, arch, bf, sizeof(bf));
 
 	pydict_set_item_string_decref(dict, "uregs",
 			_PyUnicode_FromString(bf));
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index d8857d1b6..e1a273048 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -15,6 +15,7 @@
 #include "map_symbol.h"
 #include "branch.h"
 #include "debug.h"
+#include "env.h"
 #include "evlist.h"
 #include "evsel.h"
 #include "memswap.h"
@@ -1168,7 +1169,7 @@ static void branch_stack__printf(struct perf_sample *sample, bool callstack)
 	}
 }
 
-static void regs_dump__printf(u64 mask, u64 *regs)
+static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
 {
 	unsigned rid, i = 0;
 
@@ -1176,7 +1177,7 @@ static void regs_dump__printf(u64 mask, u64 *regs)
 		u64 val = regs[i++];
 
 		printf(".... %-5s 0x%016" PRIx64 "\n",
-		       perf_reg_name(rid), val);
+		       perf_reg_name(rid, arch), val);
 	}
 }
 
@@ -1194,7 +1195,7 @@ static inline const char *regs_dump_abi(struct regs_dump *d)
 	return regs_abi[d->abi];
 }
 
-static void regs__printf(const char *type, struct regs_dump *regs)
+static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
 {
 	u64 mask = regs->mask;
 
@@ -1203,23 +1204,23 @@ static void regs__printf(const char *type, struct regs_dump *regs)
 	       mask,
 	       regs_dump_abi(regs));
 
-	regs_dump__printf(mask, regs->regs);
+	regs_dump__printf(mask, regs->regs, arch);
 }
 
-static void regs_user__printf(struct perf_sample *sample)
+static void regs_user__printf(struct perf_sample *sample, const char *arch)
 {
 	struct regs_dump *user_regs = &sample->user_regs;
 
 	if (user_regs->regs)
-		regs__printf("user", user_regs);
+		regs__printf("user", user_regs, arch);
 }
 
-static void regs_intr__printf(struct perf_sample *sample)
+static void regs_intr__printf(struct perf_sample *sample, const char *arch)
 {
 	struct regs_dump *intr_regs = &sample->intr_regs;
 
 	if (intr_regs->regs)
-		regs__printf("intr", intr_regs);
+		regs__printf("intr", intr_regs, arch);
 }
 
 static void stack_user__printf(struct stack_dump *dump)
@@ -1304,7 +1305,7 @@ char *get_page_size_name(u64 size, char *str)
 }
 
 static void dump_sample(struct evsel *evsel, union perf_event *event,
-			struct perf_sample *sample)
+			struct perf_sample *sample, const char *arch)
 {
 	u64 sample_type;
 	char str[PAGE_SIZE_NAME_LEN];
@@ -1325,10 +1326,10 @@ static void dump_sample(struct evsel *evsel, union perf_event *event,
 		branch_stack__printf(sample, evsel__has_branch_callstack(evsel));
 
 	if (sample_type & PERF_SAMPLE_REGS_USER)
-		regs_user__printf(sample);
+		regs_user__printf(sample, arch);
 
 	if (sample_type & PERF_SAMPLE_REGS_INTR)
-		regs_intr__printf(sample);
+		regs_intr__printf(sample, arch);
 
 	if (sample_type & PERF_SAMPLE_STACK_USER)
 		stack_user__printf(&sample->user_stack);
@@ -1502,7 +1503,7 @@ static int machines__deliver_event(struct machines *machines,
 			++evlist->stats.nr_unknown_id;
 			return 0;
 		}
-		dump_sample(evsel, event, sample);
+		dump_sample(evsel, event, sample, perf_env__arch(machine->env));
 		if (machine == NULL) {
 			++evlist->stats.nr_unprocessable_samples;
 			return 0;
-- 
2.25.1

Re: [PATCH v2 3/3] perf tools: Support register names from all archs

[John Garry]

On 07/12/2021 18:06, German Gomez wrote:
>   tools/perf/arch/arm/include/perf_regs.h       |  42 --
>   tools/perf/arch/arm64/include/perf_regs.h     |  76 --
>   tools/perf/arch/csky/include/perf_regs.h      |  82 ---
>   tools/perf/arch/mips/include/perf_regs.h      |  69 --
>   tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
>   tools/perf/arch/riscv/include/perf_regs.h     |  74 --
>   tools/perf/arch/s390/include/perf_regs.h      |  78 --
>   tools/perf/arch/x86/include/perf_regs.h       |  82 ---
>   tools/perf/builtin-script.c                   |  18 +-
>   tools/perf/util/perf_regs.c                   | 666 ++++++++++++++++++
>   tools/perf/util/perf_regs.h                   |  10 +-
>   .../scripting-engines/trace-event-python.c    |  10 +-
>   tools/perf/util/session.c                     |  25 +-
>   13 files changed, 697 insertions(+), 601 deletions(-)

Did you consider leaving the register structures where they are while
renaming to include the arch name and then having as externs or similar? 
I see an example of that idea for arm64_unwind_libunwind_ops.

Cheers,
John

Re: [PATCH v2 3/3] perf tools: Support register names from all archs

[German Gomez]

Hi John,

On 08/12/2021 11:51, John Garry wrote:
> On 07/12/2021 18:06, German Gomez wrote:
>>   tools/perf/arch/arm/include/perf_regs.h       |  42 --
>>   tools/perf/arch/arm64/include/perf_regs.h     |  76 --
>>   tools/perf/arch/csky/include/perf_regs.h      |  82 ---
>>   tools/perf/arch/mips/include/perf_regs.h      |  69 --
>>   tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
>>   tools/perf/arch/riscv/include/perf_regs.h     |  74 --
>>   tools/perf/arch/s390/include/perf_regs.h      |  78 --
>>   tools/perf/arch/x86/include/perf_regs.h       |  82 ---
>>   tools/perf/builtin-script.c                   |  18 +-
>>   tools/perf/util/perf_regs.c                   | 666 ++++++++++++++++++
>>   tools/perf/util/perf_regs.h                   |  10 +-
>>   .../scripting-engines/trace-event-python.c    |  10 +-
>>   tools/perf/util/session.c                     |  25 +-
>>   13 files changed, 697 insertions(+), 601 deletions(-)
>
> Did you consider leaving the register structures where they are while
> renaming to include the arch name and then having as externs or similar? I see an example of that idea for arm64_unwind_libunwind_ops.
>

If by register structures you are referring to "__perf_reg_name(int)", I
can't leave them where they are. Only one of them would be included in
the build.

I think the idea from arm64_unwind_libunwind_ops makes more sense in
that case because perf might not link against libunwind-arm64. In the
case of registers, we always have this info available in /tools/.

Thanks,
German

> Cheers,
> John

Re: [PATCH v2 3/3] perf tools: Support register names from all archs

[German Gomez]

On 08/12/2021 13:55, German Gomez wrote:
> Hi John,
>
> On 08/12/2021 11:51, John Garry wrote:
>> On 07/12/2021 18:06, German Gomez wrote:
>>>   tools/perf/arch/arm/include/perf_regs.h       |  42 --
>>>   tools/perf/arch/arm64/include/perf_regs.h     |  76 --
>>>   tools/perf/arch/csky/include/perf_regs.h      |  82 ---
>>>   tools/perf/arch/mips/include/perf_regs.h      |  69 --
>>>   tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
>>>   tools/perf/arch/riscv/include/perf_regs.h     |  74 --
>>>   tools/perf/arch/s390/include/perf_regs.h      |  78 --
>>>   tools/perf/arch/x86/include/perf_regs.h       |  82 ---
>>>   tools/perf/builtin-script.c                   |  18 +-
>>>   tools/perf/util/perf_regs.c                   | 666 ++++++++++++++++++
>>>   tools/perf/util/perf_regs.h                   |  10 +-
>>>   .../scripting-engines/trace-event-python.c    |  10 +-
>>>   tools/perf/util/session.c                     |  25 +-
>>>   13 files changed, 697 insertions(+), 601 deletions(-)
>> Did you consider leaving the register structures where they are while
>> renaming to include the arch name and then having as externs or similar? I see an example of that idea for arm64_unwind_libunwind_ops.
>>
> If by register structures you are referring to "__perf_reg_name(int)", I
> can't leave them where they are. Only one of them would be included in
> the build.

I think I need to elaborate a bit more on this since some of the files
involved share the same name but are serving different purposes and it
could lead to confusion.

The linux repo has "perf_regs.h" for each architecture enumerating the
registers from each architecture. These are the files I #include'd in
"/tools/perf/util/perf_regs.c".

The other "perf_regs.h" affected by this patch are local only to perf.
Likewise there is one file for each architecture, but contrary to the
linux ones, they are mutually exclusive, so I can't #include them all:

#ifndef ARCH_PERF_REGS_H
#define ARCH_PERF_REGS_H
//...
#undef ARCH_PERF_REGS_H

Before the patch, the functions "__perf_reg_name" were declared &
implemented in these headers, so I had to take them out.

Thanks,
German

Re: [PATCH v2 0/3] Support register names of all architectures

[Athira Rajeev]

> On 07-Dec-2021, at 11:36 PM, German Gomez <german.gomez@arm.com> wrote:
> 
> The following changeset applies some corrections to the way system
> registers are processed and presented when reading perf.data files using
> the various perf tools.
> 
> The commit message from [3/3] shows how register names aren't correctly
> presented when performing x-arch analysis of perf.data files (recording
> in one arch, then reading the file from a different arch).
> 
>  - [PATCH 1/3] Fixes a potential out-of-bounds access when reading the
>    values of the registers in the perf.data file.
>  - [PATCH 2/3] Fixes an issue of ARM and ARM64 registers having the
>    same enum name.
>  - [PATCH 3/3] Refactors the function "perf_reg_name" declared in the
>   "tools/perf/util/perf_regs.h" header, in order to support every arch.
> 
> Thanks,
> German

Looks good to me. Tested this patchset in powerpc by capturing regs in powerpc and doing
perf report to read the data from x86.

Reviewed-and-Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
> 
> --
> Changes since v1
> 
>  - Added "Reported-by" tags.
>  - Removed [PATCH 2/4] because it's not needed (suggested by Athira
>    Rajeev).
>  - Removed [PATCH 3/4] which created additional header files with the
>    register names of every arch.
>  - Introduced [PATCH 2/3] to deal with ARM and ARM64 registers having the
>    same enum name across "/tools/perf/".
>  - Reworked the refactor of "perf_reg_name" function (now implemented in
>    perf_regs.c, rather than in the header file) in [PATCH 3/3].
> 
> German Gomez (3):
>  perf tools: Prevent out-of-bounds access to registers
>  perf tools: Rename perf_event_arm_regs for ARM64 registers
>  perf tools: Support register names from all archs
> 
> tools/perf/arch/arm/include/perf_regs.h       |  42 --
> tools/perf/arch/arm64/include/perf_regs.h     |  78 +-
> tools/perf/arch/csky/include/perf_regs.h      |  82 ---
> tools/perf/arch/mips/include/perf_regs.h      |  69 --
> tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
> tools/perf/arch/riscv/include/perf_regs.h     |  74 --
> tools/perf/arch/s390/include/perf_regs.h      |  78 --
> tools/perf/arch/x86/include/perf_regs.h       |  82 ---
> tools/perf/builtin-script.c                   |  18 +-
> tools/perf/util/event.h                       |   5 +-
> tools/perf/util/libunwind/arm64.c             |   2 +
> tools/perf/util/perf_regs.c                   | 671 +++++++++++++++++-
> tools/perf/util/perf_regs.h                   |  10 +-
> .../scripting-engines/trace-event-python.c    |  10 +-
> tools/perf/util/session.c                     |  25 +-
> 15 files changed, 709 insertions(+), 603 deletions(-)
> 
> -- 
> 2.25.1
> 

Re: [PATCH v2 0/3] Support register names of all architectures

[Arnaldo Carvalho de Melo]

Em Tue, Dec 14, 2021 at 02:20:26PM +0530, Athira Rajeev escreveu:
> 
> 
> > On 07-Dec-2021, at 11:36 PM, German Gomez <german.gomez@arm.com> wrote:
> > 
> > The following changeset applies some corrections to the way system
> > registers are processed and presented when reading perf.data files using
> > the various perf tools.
> > 
> > The commit message from [3/3] shows how register names aren't correctly
> > presented when performing x-arch analysis of perf.data files (recording
> > in one arch, then reading the file from a different arch).
> > 
> >  - [PATCH 1/3] Fixes a potential out-of-bounds access when reading the
> >    values of the registers in the perf.data file.
> >  - [PATCH 2/3] Fixes an issue of ARM and ARM64 registers having the
> >    same enum name.
> >  - [PATCH 3/3] Refactors the function "perf_reg_name" declared in the
> >   "tools/perf/util/perf_regs.h" header, in order to support every arch.
> > 
> > Thanks,
> > German
> 
> Looks good to me. Tested this patchset in powerpc by capturing regs in powerpc and doing
> perf report to read the data from x86.
> 
> Reviewed-and-Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>

Thanks, added to the commit log message.

- Arnaldo

> > --
> > Changes since v1
> > 
> >  - Added "Reported-by" tags.
> >  - Removed [PATCH 2/4] because it's not needed (suggested by Athira
> >    Rajeev).
> >  - Removed [PATCH 3/4] which created additional header files with the
> >    register names of every arch.
> >  - Introduced [PATCH 2/3] to deal with ARM and ARM64 registers having the
> >    same enum name across "/tools/perf/".
> >  - Reworked the refactor of "perf_reg_name" function (now implemented in
> >    perf_regs.c, rather than in the header file) in [PATCH 3/3].
> > 
> > German Gomez (3):
> >  perf tools: Prevent out-of-bounds access to registers
> >  perf tools: Rename perf_event_arm_regs for ARM64 registers
> >  perf tools: Support register names from all archs
> > 
> > tools/perf/arch/arm/include/perf_regs.h       |  42 --
> > tools/perf/arch/arm64/include/perf_regs.h     |  78 +-
> > tools/perf/arch/csky/include/perf_regs.h      |  82 ---
> > tools/perf/arch/mips/include/perf_regs.h      |  69 --
> > tools/perf/arch/powerpc/include/perf_regs.h   |  66 --
> > tools/perf/arch/riscv/include/perf_regs.h     |  74 --
> > tools/perf/arch/s390/include/perf_regs.h      |  78 --
> > tools/perf/arch/x86/include/perf_regs.h       |  82 ---
> > tools/perf/builtin-script.c                   |  18 +-
> > tools/perf/util/event.h                       |   5 +-
> > tools/perf/util/libunwind/arm64.c             |   2 +
> > tools/perf/util/perf_regs.c                   | 671 +++++++++++++++++-
> > tools/perf/util/perf_regs.h                   |  10 +-
> > .../scripting-engines/trace-event-python.c    |  10 +-
> > tools/perf/util/session.c                     |  25 +-
> > 15 files changed, 709 insertions(+), 603 deletions(-)
> > 
> > -- 
> > 2.25.1
> > 

-- 

- Arnaldo