perf arm: Remove dwarf-regs.c

The file just provides the function get_arch_regstr, however, if in
the only caller get_dwarf_regstr EM_HOST is used for the EM_NONE case
the function can never be call

perf arm: Remove dwarf-regs.c

The file just provides the function get_arch_regstr, however, if in
the only caller get_dwarf_regstr EM_HOST is used for the EM_NONE case
the function can never be called. So remove as dead code. Tidy up the
EM_NONE cases for arm in dwarf-regs.c.

Reviewed-by: Masami Hiramatsu (Google) <[email protected]>
Signed-off-by: Ian Rogers <[email protected]>
Cc: Anup Patel <[email protected]>
Cc: Yang Jihong <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Shenlin Liang <[email protected]>
Cc: Nick Terrell <[email protected]>
Cc: Guilherme Amadio <[email protected]>
Cc: Steinar H. Gunderson <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: Alexander Lobakin <[email protected]>
Cc: Przemek Kitszel <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: James Clark <[email protected]>
Cc: Mike Leach <[email protected]>
Cc: Chen Pei <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Oliver Upton <[email protected]>
Cc: Aditya Gupta <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Athira Rajeev <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Bibo Mao <[email protected]>
Cc: John Garry <[email protected]>
Cc: Atish Patra <[email protected]>
Cc: Dima Kogan <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Dr. David Alan Gilbert <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

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perf build: Rename CONFIG_DWARF to CONFIG_LIBDW

In Makefile.config for unwinding the name dwarf implies either
libunwind or libdw. Make it clearer that CONFIG_DWARF is really just
defined when libdw

perf build: Rename CONFIG_DWARF to CONFIG_LIBDW

In Makefile.config for unwinding the name dwarf implies either
libunwind or libdw. Make it clearer that CONFIG_DWARF is really just
defined when libdw is present by renaming to CONFIG_LIBDW.

Signed-off-by: Ian Rogers <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Tested-by: Leo Yan <[email protected]>
Cc: Anup Patel <[email protected]>
Cc: Yang Jihong <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Shenlin Liang <[email protected]>
Cc: Nick Terrell <[email protected]>
Cc: Guilherme Amadio <[email protected]>
Cc: Steinar H. Gunderson <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: Alexander Lobakin <[email protected]>
Cc: Przemek Kitszel <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Masami Hiramatsu (Google) <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: James Clark <[email protected]>
Cc: Mike Leach <[email protected]>
Cc: Chen Pei <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Oliver Upton <[email protected]>
Cc: Aditya Gupta <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Athira Rajeev <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Bibo Mao <[email protected]>
Cc: John Garry <[email protected]>
Cc: Atish Patra <[email protected]>
Cc: Dima Kogan <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Dr. David Alan Gilbert <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

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perf util: Make util its own library

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 conveni

perf util: Make util its own library

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 <[email protected]>
Reviewed-by: James Clark <[email protected]>
Cc: Suzuki K Poulose <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Nick Terrell <[email protected]>
Cc: Gary Guo <[email protected]>
Cc: Alex Gaynor <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Wedson Almeida Filho <[email protected]>
Cc: Ze Gao <[email protected]>
Cc: Alice Ryhl <[email protected]>
Cc: Andrei Vagin <[email protected]>
Cc: Yicong Yang <[email protected]>
Cc: Jonathan Cameron <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Mike Leach <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Oliver Upton <[email protected]>
Cc: John Garry <[email protected]>
Cc: Benno Lossin <[email protected]>
Cc: Björn Roy Baron <[email protected]>
Cc: Andreas Hindborg <[email protected]>
Cc: Paul Walmsley <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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perf tools: Avoid 'sample_reg_masks' being const + weak

Being const + weak breaks with some compilers that constant-propagate
from the weak symbol. This behavior is outside of the specification, but

perf tools: Avoid 'sample_reg_masks' being const + weak

Being const + weak breaks with some compilers that constant-propagate
from the weak symbol. This behavior is outside of the specification, but
in LLVM is chosen to match GCC's behavior.

LLVM's implementation was set in this patch:

https://github.com/llvm/llvm-project/commit/f49573d1eedcf1e44893d5a062ac1b72c8419646

A const + weak symbol is set to be weak_odr:

https://llvm.org/docs/LangRef.html

ODR is one definition rule, and given there is one constant definition
constant-propagation is possible. It is possible to get this code to
miscompile with LLVM when applying link time optimization. As compilers
become more aggressive, this is likely to break in more instances.

Move the definition of sample_reg_masks to the conditional part of
perf_regs.h and guard usage with HAVE_PERF_REGS_SUPPORT. This avoids the
weak symbol.

Fix an issue when HAVE_PERF_REGS_SUPPORT isn't defined from patch v1.
In v3, add perf_regs.c for architectures that HAVE_PERF_REGS_SUPPORT but
don't declare sample_regs_masks.

Further notes:

Jiri asked:

"Is this just a precaution or you actualy saw some breakage?"

Ian answered:

"We saw a breakage with clang with thinlto enabled for linking. Our
compiler team had recently seen, and were surprised by, a similar issue
and were able to dig out the weak ODR issue."

Signed-off-by: Ian Rogers <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Alexey Budankov <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: [email protected]
Cc: Guo Ren <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: [email protected]
Cc: Mao Han <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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perf tools: Rename build libperf to perf

Rename build libperf to perf, because it's used to build perf.

The libperf build object name will be used for libperf library.

Signed-off-by: Jiri Olsa <jo

perf tools: Rename build libperf to perf

Rename build libperf to perf, because it's used to build perf.

The libperf build object name will be used for libperf library.

Signed-off-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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perf tools: Add coresight etm PMU record capabilities

Coresight ETMs are IP blocks used to perform HW assisted tracing on a
CPU core. This patch introduce the required auxiliary API functions
allow

perf tools: Add coresight etm PMU record capabilities

Coresight ETMs are IP blocks used to perform HW assisted tracing on a
CPU core. This patch introduce the required auxiliary API functions
allowing the perf core to interact with a tracer.

Signed-off-by: Mathieu Poirier <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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perf tools: Make coresight PMU listable

Adding the required mechanic allowing 'perf list pmu' to discover
coresight ETM/PTM tracers.

Signed-off-by: Mathieu Poirier <[email protected]>
Acke

perf tools: Make coresight PMU listable

Adding the required mechanic allowing 'perf list pmu' to discover
coresight ETM/PTM tracers.

Signed-off-by: Mathieu Poirier <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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perf unwind: Separate local/remote libunwind config

CONFIG_LIBUNWIND/NO_LIBUNWIND are changed to CONFIG_LOCAL_LIBUNWIND/
NO_LOCAL_LIBUNWIND for retaining local unwind features. The new
CONFIG_LIBUNW

perf unwind: Separate local/remote libunwind config

CONFIG_LIBUNWIND/NO_LIBUNWIND are changed to CONFIG_LOCAL_LIBUNWIND/
NO_LOCAL_LIBUNWIND for retaining local unwind features. The new
CONFIG_LIBUNWIND stands for either local or remote or both unwind are
supported, and NO_LIBUNWIND means that neither local nor remote unwind
is supported.

LIBUNWIND_LIBS is eliminated in LDFLAGS if local libunwind is not
supported.

Signed-off-by: He Kuang <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Ekaterina Tumanova <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Sukadev Bhattiprolu <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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perf build: Add arch arm objects building

Move the arm arch objects building under build framework to be included
in the libperf build object.

Signed-off-by: Jiri Olsa <[email protected]>
Tested-by:

perf build: Add arch arm objects building

Move the arm arch objects building under build framework to be included
in the libperf build object.

Signed-off-by: Jiri Olsa <[email protected]>
Tested-by: Sukadev Bhattiprolu <[email protected]>
Tested-by: Will Deacon <[email protected]>
Cc: Alexis Berlemont <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Corey Ashford <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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