linux/tools/perf/util/perf-regs-arch/perf_regs_csky.c

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perf parse-regs: Refactor arch register parsing functions Every architecture has a specific register parsing function for returning register name based on register index, to support cross analysis (e.g. we use perf x86 binary to parse Arm64's perf data), we build all these register parsing functions into the tool, this is why we place all related functions into util/perf_regs.c. Unfortunately, since util/perf_regs.c needs to include every arch's perf_regs.h, this easily introduces duplicated definitions coming from multiple headers, finally it's fragile for building and difficult for maintenance. We cannot simply move these register parsing functions into the corresponding 'arch' folder, the folder is only conditionally built based on the target architecture. Therefore, this commit creates a new folder util/perf-regs-arch/ and uses a dedicated source file to keep every architecture's register parsing function to avoid definition conflicts. This is only a refactoring, no functionality change is expected. Committer notes: Had to add util/perf-regs-arch/*.c to tools/perf/util/python-ext-sources to keep 'perf test python' passing. 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/20230606014559.21783-2-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-06-06 09:45:54 +08:00
// SPDX-License-Identifier: GPL-2.0
#include "../perf_regs.h"
#include "../../arch/csky/include/uapi/asm/perf_regs.h"
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;
}
perf parse-regs: Introduce functions perf_arch_reg_{ip|sp}() 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>
2023-06-06 09:45:55 +08:00
uint64_t __perf_reg_ip_csky(void)
{
return PERF_REG_CSKY_PC;
}
uint64_t __perf_reg_sp_csky(void)
{
return PERF_REG_CSKY_SP;
}