linux-toradex.git/tools/perf/arch/mips, branch master

tools headers: Update the syscall tables and unistd.h, to support the new 'rseq_slice_yield' syscall

2026-03-05T20:20:23+00:00

Picking up the changes from these csets:

  2153b2e8917b73e9 ("sparc: Add architecture support for clone3")
  99d2592023e5d0a3 ("rseq: Implement sys_rseq_slice_yield()")
  4ac286c4a8d904c8 ("s390/syscalls: Switch to generic system call table generation")

This makes 'perf trace' support it, now its possible, for instance, to
do:

  # perf trace -e rseq_slice_yield --max-stack=16

Here is an example with the 'sendmmsg' syscall:

  root@x1:~# perf trace -e sendmmsg --max-stack 16 --max-events=1
       0.000 ( 0.062 ms): dbus-broker/1012 sendmmsg(fd: 150, mmsg: 0x7ffef57cca50, vlen: 1, flags: DONTWAIT|NOSIGNAL) = 1
                                         syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
                                         syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
                                         syscall_exit_to_user_mode ([kernel.kallsyms])
                                         do_syscall_64 ([kernel.kallsyms])
                                         entry_SYSCALL_64 ([kernel.kallsyms])
                                         [0x117ce7] (/usr/lib64/libc.so.6 (deleted))
  root@x1:~#

To do a system wide tracing of the new 'rseq_slice_yield' syscall with a
backtrace of at most 16 entries.

This addresses these perf tools build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
    diff -u tools/scripts/syscall.tbl scripts/syscall.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
    diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl
    diff -u tools/perf/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl
    diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl

Cc: Andreas Larsson 
Cc: Heiko Carstens 
Cc: Ludwig Rydberg 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Signed-off-by: Arnaldo Carvalho de Melo

perf regs: Remove weak attributive archxxx_reg_mask() functions

2026-02-06T15:16:09+00:00

Currently, some architecture-specific perf-regs functions, such as
arch__intr_reg_mask() and arch__user_reg_mask(), are defined with the
__weak attribute.

This approach ensures that only functions matching the architecture of
the build/run host are compiled and executed, reducing build time and
binary size.

However, this __weak attribute restricts these functions to be called
only on the same architecture, preventing cross-architecture
functionality.

For example, a perf.data file captured on x86 cannot be parsed on an ARM
platform.

To address this limitation, this patch removes the __weak attribute from
these perf-regs functions.

The architecture-specific code is moved from the arch/ directory to the
util/perf-regs-arch/ directory.

The appropriate architectural functions are then called based on the
EM_HOST.

No functional changes are intended.

Suggested-by: Ian Rogers 
Reviewed-by: Ian Rogers 
Signed-off-by: Dapeng Mi 
Cc: Adrian Hunter 
Cc: Albert Ou 
Cc: Alexander Shishkin 
Cc: Alexandre Ghiti 
Cc: Guo Ren 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: John Garry 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Peter Zijlstra 
Cc: Thomas Falcon 
Cc: Will Deacon 
Cc: Xudong Hao 
Cc: Zide Chen 
[ Fixed up somme fuzz with s390 and riscv Build files wrt removing perf_regs.o ]
Signed-off-by: Arnaldo Carvalho de Melo

perf arch: Update arch headers to use relative UAPI paths

2026-02-06T15:15:48+00:00

The architectural specific headers perf_regs.h currently rely on the
host architecture's 'asm/perf_regs.h'.

This can lead to compilation inconsistencies or failures when including
and building perf for a target architecture that differs from the host's
architecture.

Explicitly point to the UAPI headers within the tools source tree using
relative paths.

This ensures that perf is always built against the intended
architecture.

No functional changes are intended.

Reviewed-by: Ian Rogers 
Signed-off-by: Dapeng Mi 
Cc: Adrian Hunter 
Cc: Albert Ou 
Cc: Alexander Shishkin 
Cc: Alexandre Ghiti 
Cc: Guo Ren 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: John Garry 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Peter Zijlstra 
Cc: Thomas Falcon 
Cc: Will Deacon 
Cc: Xudong Hao 
Cc: Zide Chen 
Signed-off-by: Arnaldo Carvalho de Melo

perf regs: Refactor use of arch__sample_reg_masks() to perf_reg_name()

2026-01-23T19:58:39+00:00

arch__sample_reg_masks isn't supported on ARM(32), csky, loongarch,
MIPS, RISC-V and s390.

The table returned by the function just has the name of a register
paired with the corresponding sample_regs_user mask value.

For a given perf register we can compute the name with perf_reg_name and
the mask is just 1 left-shifted by the perf register number.

Change __parse_regs to use this method for finding registers rather than
arch__sample_reg_masks, thereby adding __parse_regs support for ARM(32),
csky, loongarch, MIPS, RISC-V and s390.

As arch__sample_reg_masks is then unused, remove the now unneeded
declarations.

Signed-off-by: Ian Rogers 
Tested-by: Thomas Richter 
Cc: Aditya Bodkhe 
Cc: Adrian Hunter 
Cc: Albert Ou 
Cc: Alexandre Ghiti 
Cc: Andi Kleen 
Cc: Athira Rajeev 
Cc: Chun-Tse Shao 
Cc: Dapeng Mi 
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: 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 disasm: Don't include C files from the arch directory

2026-01-23T19:58:38+00:00

Move the arch instructions.c files into appropriately named files in
annotate-arch in the util directory.

Don't #include to compile the code, switch to building the files and fix
up the #includes accordingly.

Move powerpc specific disasm code out of disasm.c and into
annotate-powerpc.c.

Declarations and static removed as appropriate for the code to compile
as separate compilation units.

The e_machine and e_flags set up is moved to the disasm.c architectures
array so that later patches can sort by them.

Reviewed-by: James Clark 
Signed-off-by: Ian Rogers 
Cc: Aditya Bodkhe 
Cc: Adrian Hunter 
Cc: Albert Ou 
Cc: Alexander Shishkin 
Cc: Alexandre Ghiti 
Cc: Athira Rajeev 
Cc: Bill Wendling 
Cc: Dr. David Alan Gilbert 
Cc: Guo Ren 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Julia Lawall 
Cc: Justin Stitt 
Cc: Krzysztof Łopatowski 
Cc: Leo Yan 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: Nick Desaulniers 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Peter Zijlstra 
Cc: Sergei Trofimovich 
Cc: Shimin Guo 
Cc: Suchit Karunakaran 
Cc: Thomas Falcon 
Cc: Tianyou Li 
Cc: Will Deacon 
Cc: Zecheng Li 
Signed-off-by: Arnaldo Carvalho de Melo

perf disasm: Constify use of 'struct ins_op'

2026-01-23T19:58:38+00:00

The 'struct ins_op' holds variables to function pointers that are read
but not written. Change uses to be for a "const struct ins_op *"
version to capture this immutability.

Reviewed-by: James Clark 
Signed-off-by: Ian Rogers 
Cc: Aditya Bodkhe 
Cc: Adrian Hunter 
Cc: Albert Ou 
Cc: Alexander Shishkin 
Cc: Alexandre Ghiti 
Cc: Athira Rajeev 
Cc: Bill Wendling 
Cc: Dr. David Alan Gilbert 
Cc: Guo Ren 
Cc: Howard Chu 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Julia Lawall 
Cc: Justin Stitt 
Cc: Krzysztof Łopatowski 
Cc: Leo Yan 
Cc: Namhyung Kim 
Cc: Nathan Chancellor 
Cc: Nick Desaulniers 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Peter Zijlstra 
Cc: Sergei Trofimovich 
Cc: Shimin Guo 
Cc: Suchit Karunakaran 
Cc: Thomas Falcon 
Cc: Tianyou Li 
Cc: Will Deacon 
Cc: Zecheng Li 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Sync syscall table with kernel sources

2025-12-24T19:43:36+00:00

To pick up changes from:

  b36d4b6aa88ef039 ("arch: hookup listns() system call")

This should be used to beautify the syscall arguments and it addresses
these tools/perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
    diff -u tools/scripts/syscall.tbl scripts/syscall.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
    diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl
    diff -u tools/perf/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl
    diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl

Please see tools/include/uapi/README.

Note that s390 syscall table is still out of sync as it switches to use the
generic table.  But I'd like to minimize the change in this commit.

Cc: linux-arch@vger.kernel.org
Signed-off-by: Namhyung Kim

tools headers: Sync syscall tables with the kernel source

2025-08-18T20:49:25+00:00

To pick up the changes in this cset:

  be7efb2d20d67f33 fs: introduce file_getattr and file_setattr syscalls

This addresses these perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
    diff -u tools/scripts/syscall.tbl scripts/syscall.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
    diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl
    diff -u tools/perf/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl
    diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl

Please see tools/include/uapi/README for further details.

Cc: Arnd Bergmann 
CC: linux-api@vger.kernel.org
Signed-off-by: Namhyung Kim

tools headers: Update the syscall table with the kernel sources

2025-04-10T16:28:24+00:00

To pick up the changes in:

  c4a16820d9019940 fs: add open_tree_attr()
  2df1ad0d25803399 x86/arch_prctl: Simplify sys_arch_prctl()
  e632bca07c8eef1d arm64: generate 64-bit syscall.tbl

This is basically to support the new open_tree_attr syscall.  But it
also needs to update asm-generic unistd.h header to get the new syscall
number.  And arm64 unistd.h header was converted to use the generic
64-bit header.

Addressing this perf tools build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/scripts/syscall.tbl scripts/syscall.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
    diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl
    diff -u tools/perf/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl
    diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl
    diff -u tools/arch/arm64/include/uapi/asm/unistd.h arch/arm64/include/uapi/asm/unistd.h
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h

Please see tools/include/uapi/README for further details.

Acked-by: Ingo Molnar 
Tested-by: Venkat Rao Bagalkote 
Cc: linux-arch@vger.kernel.org
Link: https://lore.kernel.org/r/20250410001125.391820-6-namhyung@kernel.org
Signed-off-by: Namhyung Kim

perf build: Remove Makefile.syscalls

2025-03-21T05:58:20+00:00

Now a single beauty file is generated and used by all architectures,
remove the per-architecture Makefiles, Kbuild files and previous
generator script.

Note: there was conversation with Charlie Jenkins
 and they'd written an alternate approach to
support multiple architectures:
https://lore.kernel.org/all/20250114-perf_syscall_arch_runtime-v1-1-5b304e408e11@rivosinc.com/
It would have been better to have helped Charlie fix their series (my
apologies) but they agreed that the approach taken here was likely
best for longer term maintainability:
https://lore.kernel.org/lkml/Z6Jk_UN9i69QGqUj@ghost/

Signed-off-by: Ian Rogers 
Reviewed-by: Howard Chu 
Reviewed-by: Charlie Jenkins 
Reviewed-by: Namhyung Kim 
Acked-by: Arnaldo Carvalho de Melo 
Link: https://lore.kernel.org/r/20250319050741.269828-11-irogers@google.com
Signed-off-by: Namhyung Kim