linux-kernel - [PATCH 0/2] perf: tests: Fix object code reading test for riscv

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Message-Id: <20241216-perf_fix_riscv_obj_reading-v1-0-b75962660a9b@rivosinc.com>
Date: Mon, 16 Dec 2024 15:12:50 -0800
From: Charlie Jenkins <charlie@...osinc.com>
To: Masahiro Yamada <masahiroy@...nel.org>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Nathan Chancellor <nathan@...nel.org>, 
 Nick Desaulniers <ndesaulniers@...gle.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
 Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>, 
 Mickaël Salaün <mic@...ikod.net>, 
 Günther Noack <gnoack@...gle.com>, 
 Nelson Chu <nelson@...osinc.com>
Cc: linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, llvm@...ts.linux.dev, 
 linux-perf-users@...r.kernel.org, linux-security-module@...r.kernel.org, 
 Charlie Jenkins <charlie@...osinc.com>
Subject: [PATCH 0/2] perf: tests: Fix object code reading test for riscv

There was a breaking change to binutils objdump that causes partial
instructions to no longer be dumped. This behavior is different from
what the "Object code reading" test expects. Add a Kconfig variable that
checks the version of objdump and conditionally enables the perf test
fix for riscv objdump versions effected by this issue.

A binutils patch has been sent as well to fix this in objdump [1].

Link:
https://sourceware.org/pipermail/binutils/2024-December/138139.html [1]

To: 

Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
---
Charlie Jenkins (2):
      kbuild: Check version of objdump
      tools: perf: tests: Fix code reading for riscv

 arch/riscv/Kconfig              |  5 +++
 init/Kconfig                    | 10 ++++++
 scripts/Kconfig.include         |  6 ++++
 scripts/objdump-version.sh      | 69 +++++++++++++++++++++++++++++++++++++++++
 tools/perf/tests/code-reading.c | 17 +++++++++-
 5 files changed, 106 insertions(+), 1 deletion(-)
---
base-commit: fac04efc5c793dccbd07e2d59af9f90b7fc0dca4
change-id: 20241213-perf_fix_riscv_obj_reading-cabf02be3c85
-- 
- Charlie