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linux/tools/perf/util/perf_regs.c
German Gomez 83869019c7 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>
2021-12-16 12:18:12 -03:00

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// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <string.h>
#include "perf_regs.h"
#include "event.h"
int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused,
char **new_op __maybe_unused)
{
return SDT_ARG_SKIP;
}
uint64_t __weak arch__intr_reg_mask(void)
{
return PERF_REGS_MASK;
}
uint64_t __weak arch__user_reg_mask(void)
{
return PERF_REGS_MASK;
}
#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;
u64 mask = regs->mask;
if ((u64)id >= PERF_SAMPLE_REGS_CACHE_SIZE)
return -EINVAL;
if (regs->cache_mask & (1ULL << id))
goto out;
if (!(mask & (1ULL << id)))
return -EINVAL;
for (i = 0; i < id; i++) {
if (mask & (1ULL << i))
idx++;
}
regs->cache_mask |= (1ULL << id);
regs->cache_regs[id] = regs->regs[idx];
out:
*valp = regs->cache_regs[id];
return 0;
}
#endif
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