perf arch: Support register names from all archs

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]

Tester comments:

Athira reports:

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

Reported-by: Alexandre Truong <alexandre.truong@arm.com>
Reviewed-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: German Gomez <german.gomez@arm.com>
Tested-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-csky@vger.kernel.org
Cc: linux-riscv@lists.infradead.org
Link: https://lore.kernel.org/r/20211207180653.1147374-4-german.gomez@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 0 insertions, 82 deletions

diff --git a/tools/perf/arch/x86/include/perf_regs.h b/tools/perf/arch/x86/include/perf_regs.h
index cddc4cdc0d9b..16e23b722042 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 */