mirror of
https://github.com/torvalds/linux.git
synced 2026-04-27 11:02:31 -04:00
34af56afac
The current code uses macros PERF_REG_IP and PERF_REG_SP for parsing registers and we build perf with these macros statically, which means it only can correctly analyze CPU registers for the native architecture and fails to support cross analysis (e.g. we build perf on x86 and cannot analyze Arm64's registers). We need to generalize util/perf_regs.c for support multi architectures, as a first step, this commit introduces new functions perf_arch_reg_ip() and perf_arch_reg_sp(), these two functions dynamically return IP and SP register index respectively according to the parameter "arch". Every architecture has its own functions (like __perf_reg_ip_arm64 and __perf_reg_sp_arm64), these architecture specific functions are defined in each arch source file under folder util/perf-regs-arch; at the end all of them are built into the tool for cross analysis. Committer notes: Make DWARF_MINIMAL_REGS() an inline function, so that we can use the __maybe_unused attribute for the 'arch' parameter, as this will avoid a build failure when that variable is unused in the callers. That happens when building on unsupported architectures, the ones without HAVE_PERF_REGS_SUPPORT defined. Signed-off-by: Leo Yan <leo.yan@linaro.org> Acked-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Eric Lin <eric.lin@sifive.com> Cc: Fangrui Song <maskray@google.com> Cc: Guo Ren <guoren@kernel.org> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ivan Babrou <ivan@cloudflare.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Ming Wang <wangming01@loongson.cn> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sandipan Das <sandipan.das@amd.com> 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/20230606014559.21783-3-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#ifdef HAVE_PERF_REGS_SUPPORT
|
|
|
|
#include "../perf_regs.h"
|
|
#include "../../../arch/mips/include/uapi/asm/perf_regs.h"
|
|
|
|
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;
|
|
}
|
|
|
|
uint64_t __perf_reg_ip_mips(void)
|
|
{
|
|
return PERF_REG_MIPS_PC;
|
|
}
|
|
|
|
uint64_t __perf_reg_sp_mips(void)
|
|
{
|
|
return PERF_REG_MIPS_R29;
|
|
}
|
|
|
|
#endif
|