[Patch v9 00/10] Perf tools: Support eGPRs/SSP/SIMD registers sampling

[Dapeng Mi <dapeng1.mi@linux.intel.com>]

Patch layout:
- Patches 1-2: Fix two bugs in DWARF register bounds checking and event
  attribute printing/swapping.
- Patches 3-4: Sync tools and perf headers with the kernel sources.
- Patches 5-8: Add SIMD/eGPR/SSP sampling and dump support.
- Patches 9-10: Add unit tests for SIMD/eGPR/SSP sampling.

Changes since v8:
- Patch 01/10: Fix incorrect DWARF register bounds checking.
- Patch 02/10: Add missing event attribute printing and swapping support
  (Sashiko).
- Patch 07/10: Remove dead code ([idx++]) in SIMD register dumping
  (Sashiko).
- Patch 08/10: Restore the original x86 libdw_frame_nregs value (17), as
  libdw still lacks x86 SIMD/eGPR support (Ian).
- Patch 09/10: Add x86 eGPR/SSP sampling unit tests (Ian).
- Patch 10/10: Add x86 SIMD register sampling unit tests (Ian).

Changes since v7:
- Address Sashiko's comments including,
  * documents are not update availably; SIMD registers bitmask may be
    overwritten by shorter mask; u16 type in sample meta-data break the
    cross-endian conversion, etc.
- Add SIMD/eGPRs/SSP support in dwarf-regs (Ian).
- Misc enhancements.

Changes since v6:
- Address Ian's comments including,
  * Add more comments for newly added register indexes (patch 1/4).
  * Several minor enhancements in patch 4/4.
- Limit dwarf minimal regs to legacy GPRs (excluding APX eGPRs)
  (patch 2/4).

Changes since v5:
- Split the sampling support for eGPRs/SSP registers and SIMD registers
  into 2 patches.
- Address Ian's comments including,
  * Convert the architecture dependent functions into regular
    architectural independent functions, like whatperf_reg_name() does.
  * Refine the functions name to represent what the functions really do.
  * Add comments for some key functions arguments.
  * Misc enhancements.

This patch-set adds sampling support for x86 eGPRs/SSP/SIMD registers in
perf tools base on the corresponding sampling support for eGPRs/SSP/SIMD
registers in kernel[1]. In versions before v6, these perf-tools patches
are integrated as a whole patch-set with the kernel patches, but it's
split and posted to an independent perf-tools patch-set for convenient
review.

History:
v8: https://lore.kernel.org/all/20260529082451.591783-1-dapeng1.mi@linux.intel.com/
v7: https://lore.kernel.org/all/20260324005706.3778057-1-dapeng1.mi@linux.intel.com/
v6: https://lore.kernel.org/all/20260209083514.2225115-1-dapeng1.mi@linux.intel.com/
v5: https://lore.kernel.org/all/20251203065500.2597594-1-dapeng1.mi@linux.intel.com/
v4: https://lore.kernel.org/all/20250925061213.178796-1-dapeng1.mi@linux.intel.com/
v3: https://lore.kernel.org/lkml/20250815213435.1702022-1-kan.liang@linux.intel.com/
v2: https://lore.kernel.org/lkml/20250626195610.405379-1-kan.liang@linux.intel.com/
v1: https://lore.kernel.org/lkml/20250613134943.3186517-1-kan.liang@linux.intel.com/

Ref:
[1] Kernel patches of supporting eGPRs/SSP/SIMD registers sampling:
https://lore.kernel.org/all/20260706015439.3040804-1-dapeng1.mi@linux.intel.com/

Dapeng Mi (10):
  perf dwarf-regs: Fix DWARF register index bounds check
  perf util: Add missed fields in _attr__fprintf() and __attr_swap()
  tools headers: Sync x86 headers with kernel sources
  perf headers: Sync perf_event.h/perf_regs.h with the kernel headers
  perf regs: Support x86 eGPRs/SSP sampling
  perf regs: Support x86 SIMD registers sampling
  perf regs: Enable dumping of SIMD registers
  perf dwarf-regs: Add SIMD/eGPRs support for x86 DWARF registers
  perf tests: Add x86 eGPRs/SSP registers sampling test
  perf tests: Add SIMD registers sampling test

 tools/arch/x86/include/asm/msr-index.h        |   7 +
 tools/arch/x86/include/uapi/asm/perf_regs.h   |  53 +++
 tools/include/uapi/linux/perf_event.h         |  49 ++-
 tools/perf/Documentation/perf-record.txt      |  10 +-
 tools/perf/builtin-script.c                   |  93 +++-
 tools/perf/tests/shell/record.sh              | 257 +++++++++++
 .../util/dwarf-regs-arch/dwarf-regs-csky.c    |   2 +-
 .../util/dwarf-regs-arch/dwarf-regs-powerpc.c |   2 +-
 .../util/dwarf-regs-arch/dwarf-regs-s390.c    |   2 +-
 .../util/dwarf-regs-arch/dwarf-regs-x86.c     | 140 +++++-
 tools/perf/util/dwarf-regs.c                  |   9 +-
 tools/perf/util/evsel.c                       | 104 ++++-
 tools/perf/util/header.c                      |   3 +-
 tools/perf/util/include/dwarf-regs.h          |   7 +-
 tools/perf/util/parse-regs-options.c          | 186 +++++++-
 .../perf/util/perf-regs-arch/perf_regs_x86.c  | 416 +++++++++++++++++-
 tools/perf/util/perf_event_attr_fprintf.c     |  13 +
 tools/perf/util/perf_regs.c                   |  84 +++-
 tools/perf/util/perf_regs.h                   |  21 +-
 tools/perf/util/record.h                      |   7 +
 tools/perf/util/sample.h                      |   5 +
 .../scripting-engines/trace-event-python.c    | 127 +++++-
 tools/perf/util/session.c                     | 112 ++++-
 tools/perf/util/synthetic-events.c            |  38 ++
 tools/perf/util/unwind-libdw.c                |   6 +-
 25 files changed, 1643 insertions(+), 110 deletions(-)


base-commit: ca0e19074bd6afcb9c7b23aa474ca17238cdb241
-- 
2.34.1