linux.git - Linux kernel mainline source

Age	Commit message (Collapse)	Author
2026-09-22	perf riscv: Add perf_regs_load and enable the dwarf unwind test	Chen Pei
	riscv has no arch level perf test: tests/builtin-test.c only picks up arch_tests[] for x86, arm64 and powerpc64, tests/Build only builds the generic dwarf unwind test driver for x86, arm, arm64 and powerpc, and arch/riscv/tests/ did not exist. "Test dwarf unwind" was therefore never registered on riscv, even though DWARF is the only reliable way to walk a riscv user stack -- the arch callchain code walks frame pointers only -- and both unwinders already support riscv, elfutils libdw generically and libunwind through util/libunwind-arch/libunwind-riscv.c. Add perf_regs_load() and the arch unwind sample helper modelled on the arm64 ones, and wire riscv into the two gates. The x1..x31 slots of enum perf_event_riscv_regs match the hardware registers one to one, and PERF_REG_RISCV_PC is filled with ra so that unwinding starts at the caller. Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Chen Pei <cp0613@linux.alibaba.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2024-06-26	perf util: Make util its own library	Ian Rogers
	Make the util directory into its own library. This is done to avoid compiling code twice, once for the perf tool and once for the perf python module. For convenience: arch/common.c scripts/perl/Perf-Trace-Util/Context.c scripts/python/Perf-Trace-Util/Context.c are made part of this library. Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: James Clark <james.clark@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Kees Cook <keescook@chromium.org> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Nick Terrell <terrelln@fb.com> Cc: Gary Guo <gary@garyguo.net> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Wedson Almeida Filho <wedsonaf@gmail.com> Cc: Ze Gao <zegao2021@gmail.com> Cc: Alice Ryhl <aliceryhl@google.com> Cc: Andrei Vagin <avagin@google.com> Cc: Yicong Yang <yangyicong@hisilicon.com> Cc: Jonathan Cameron <jonathan.cameron@huawei.com> Cc: Guo Ren <guoren@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Leo Yan <leo.yan@linux.dev> Cc: Oliver Upton <oliver.upton@linux.dev> Cc: John Garry <john.g.garry@oracle.com> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Andreas Hindborg <a.hindborg@samsung.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240625214117.953777-7-irogers@google.com
2019-09-05	riscv: Add support for libdw	Mao Han
	This patch adds support for DWARF register mappings and libdw registers initialization, which is used by perf callchain analyzing when --call-graph=dwarf is given. Signed-off-by: Mao Han <han_mao@c-sky.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Greentime Hu <green.hu@gmail.com> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: linux-riscv <linux-riscv@lists.infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Guo Ren <guoren@kernel.org> Tested-by: Greentime Hu <greentime.hu@sifive.com> Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>