kernel/linux.git/tools/perf/Makefile.config, branch v7.0.11

tools build: Fix rust cross compilation

2026-03-04T14:37:30+00:00

Currently no target is specified to compile rust code when needed, which breaks cross compilation. E.g. for arm64: LD /tmp/build/tests/workloads/perf-test-in.o aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) [...repeated...] aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a(code_with_type.code_with_type.d12f4324cb53c560-cgu.0.rcgu.o): Relocations in generic ELF (EM: 62) aarch64-linux-gnu-ld: /tmp/build/tests/workloads/code_with_type.a: error adding symbols: file in wrong format make[5]: *** [/perf/tools/build/Makefile.build:162: /tmp/build/tests/workloads/perf-test-in.o] Error 1 make[4]: *** [/perf/tools/build/Makefile.build:156: workloads] Error 2 make[3]: *** [/perf/tools/build/Makefile.build:156: tests] Error 2 make[2]: *** [Makefile.perf:785: /tmp/build/perf-test-in.o] Error 2 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [Makefile.perf:289: sub-make] Error 2 make: *** [Makefile:76: all] Error 2 Detect required target and pass it via rust_flags to the compiler. Note that CROSS_COMPILE might be different from what rust compiler expects, since it may omit the target vendor value, e.g. "aarch64-linux-gnu" instead of "aarch64-unknown-linux-gnu". Thus explicitly map supported CROSS_COMPILE values to corresponding Rust versions, as suggested by Miguel Ojeda. Tested using arm64 cross-compilation example from [1]. Fixes: 2e05bb52a12d3cdb ("perf test workload: Add code_with_type test workload") Reviewed-by: Ian Rogers Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Levi Zim Cc: Miguel Ojeda Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nicolas Schier Link: https://perfwiki.github.io/main/arm64-cross-compilation-dockerfile/ [1] Signed-off-by: Arnaldo Carvalho de Melo

tools build: Fix rust feature detection

2026-02-09T14:10:56+00:00

Features in FEATURE_TESTS_BASIC will be set as being available if test-all.c builds, so since the rust test isn't included in test-all.c, we can't have 'rust' in there, remove it from FEATURE_TESTS_BASIC and use feature-check so that it tries to build test-rust.bin, doing the actual feature detection. On a system lacking a rust compiler: Makefile.config:1158: Rust is not found. Test workloads with rust are disabled. Auto-detecting system features: ... libdw: [ on ] ... glibc: [ on ] ... libelf: [ on ] ... libnuma: [ on ] ... numa_num_possible_cpus: [ on ] ... libpython: [ on ] ... libcapstone: [ on ] ... llvm-perf: [ on ] ... zlib: [ on ] ... lzma: [ on ] ... bpf: [ on ] ... libaio: [ on ] ... libzstd: [ on ] ... libopenssl: [ on ] ... rust: [ OFF ] $ cat /tmp/build/perf-tools-next/feature/test-rust.make.output /bin/sh: line 1: rustc: command not found $ file /tmp/build/perf-tools-next/feature/test-rust.bin /tmp/build/perf-tools-next/feature/test-rust.bin: cannot open `/tmp/build/perf-tools-next/feature/test-rust.bin' (No such file or directory) $ $ perf -vv | grep RUST rust: [ OFF ] # HAVE_RUST_SUPPORT $ And after installing it: ... rust: [ on ] $ cat /tmp/build/perf-tools-next/feature/test-rust.make.output $ file /tmp/build/perf-tools-next/feature/test-rust.bin /tmp/build/perf-tools-next/feature/test-rust.bin: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=9c416edf673ee3705b97bae893a99a6fcf1ee258, for GNU/Linux 3.2.0, with debug_info, not stripped $ $ perf -vv | grep RUST rust: [ on ] # HAVE_RUST_SUPPORT $ Fixes: 6a32fa5ccd33da5d ("tools build: Add a feature test for rust compiler") Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo

tools build: Add a feature test for rust compiler

2026-02-08T14:30:45+00:00

Add a feature test to identify if the rust compiler is available, so that perf could build rust based worloads based on that. Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Ian Rogers Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf kvm stat: Remove use of the arch directory

2026-02-03T21:01:27+00:00

`perf kvm stat` supports record and report options. By using the arch directory a report for a different machine type cannot be supported. Move the kvm-stat code out of the arch directory and into util/kvm-stat-arch following the pattern of perf-regs and dwarf-regs. Avoid duplicate symbols by renaming functions to have the architecture name within them. For global variables, wrap them in an architecture specific function. Selecting the architecture to use with `perf kvm stat` is selected by EM_HOST, ie no different than before the change. Later the ELF machine can be determined from the session or a header feature (ie EM_HOST at the time of the record). The build and #define HAVE_KVM_STAT_SUPPORT is now redundant so remove across Makefiles and in the build. Opportunistically constify architectural structs and arrays. Signed-off-by: Ian Rogers Cc: Aditya Bodkhe Cc: Adrian Hunter Cc: Albert Ou Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Andi Kleen Cc: Andrew Jones Cc: Anubhav Shelat Cc: Anup Patel Cc: Athira Rajeev Cc: Blake Jones Cc: Chun-Tse Shao Cc: Dapeng Mi Cc: Dmitriy Vyukov Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Leo Yan Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Quan Zhou Cc: Shimin Guo Cc: Swapnil Sapkal Cc: Thomas Falcon Cc: Will Deacon Cc: Yunseong Kim Signed-off-by: Arnaldo Carvalho de Melo

perf capstone: Support for dlopen-ing libcapstone.so

2026-02-03T14:34:02+00:00

If perf is built with LIBCAPSTONE_DLOPEN=1, support dlopen-ing libcapstone.so and then calling the necessary functions by looking them up using dlsym. The types come from capstone.h which means the libcapstone feature check needs to pass, and NO_CAPSTONE=1 hasn't been defined. This will cause the definition of HAVE_LIBCAPSTONE_SUPPORT. Earlier versions of this code tried to declare the necessary capstone.h constants and structs, but they weren't stable and caused breakages across libcapstone releases. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Bill Wendling Cc: Charlie Jenkins Cc: Collin Funk Cc: Dmitriy Vyukov Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Justin Stitt Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

Revert "perf tools: Fix arm64 build by generating unistd_64.h"

2026-01-26T20:08:43+00:00

This reverts: commit 8988c4b91945173a ("perf tools: Fix in-source libperf build") commit bfb713ea53c746b0 ("perf tools: Fix arm64 build by generating unistd_64.h") Since we now have a static unistd_64.h for the arm64 build, there is no need to generate unistd_64.h in libperf. Revert all patches related to generating unistd_64.h. Reviewed-by: James Clark Signed-off-by: Leo Yan Cc: Adrian Hunter Cc: Arnd Bergmann Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove NO_LIBDW_DWARF_UNWIND option

2026-01-20T18:43:56+00:00

Libdw unwinding support is present for every architecture that has a perf_regs.h - perf registers are needed for the initial frame to unwind. Elfutils also supports SPARC, ARC and m68k but there is no support in the Linux kernel for perf registers on these architectures. As the perf supported DWARF unwinding architectures are a subset of the elfutils ones, remove NO_LIBDW_DWARF_UNWIND as there isn't a case of elfutils lacking the support need for perf. Signed-off-by: Ian Rogers Cc: Aditya Bodkhe Cc: Adrian Hunter Cc: Albert Ou Cc: Alexandre Ghiti Cc: Andi Kleen Cc: Athira Rajeev Cc: Chun-Tse Shao Cc: Dmitriy Vyukov Cc: Dr. David Alan Gilbert Cc: Guo Ren Cc: Haibo Xu Cc: Howard Chu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Krzysztof Łopatowski Cc: Leo Yan Cc: Mark Wielaard Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Sergei Trofimovich Cc: Shimin Guo Cc: Stephen Brennan Cc: Thomas Falcon Cc: Will Deacon Signed-off-by: Arnaldo Carvalho de Melo

perf build: Feature test for libbfd thread safety API

2026-01-06T22:14:46+00:00

The non-distro build requires libbfd 2.42 since commit b72b8132d8fd ("perf libbfd: Ensure libbfd is initialized prior to use"). Add a feature test so that it's obvious why the build fails if this criteria isn't met. Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Bill Wendling Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Justin Stitt Cc: Leo Yan Cc: Mark Rutland Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf build: Remove unused libbfd-buildid feature test

2026-01-06T22:14:00+00:00

HAVE_LIBBFD_BUILDID_SUPPORT isn't used in the codebase so remove the feature test that sets it. Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Bill Wendling Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Justin Stitt Cc: Leo Yan Cc: Mark Rutland Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf build: Do all non-distro feature checks in one go

2026-01-06T22:11:13+00:00

None of the if statements or variable assignments in the non-distro block actually affect the feature checks. Just do them all in one place so the flow isn't obscured. Signed-off-by: James Clark Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Bill Wendling Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Justin Stitt Cc: Leo Yan Cc: Mark Rutland Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo