[GIT PULL] x86/fpu updates for v6.15

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest x86/fpu Git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-fpu-2025-03-22

   # HEAD: dda366083e5ff307a4a728757db874bbfe7550be x86/fpu/xstate: Fix inconsistencies in guest FPU xfeatures

x86/fpu updates for v6.15:

 - Improve crypto performance by making kernel-mode FPU reliably usable
   in softirqs ((Eric Biggers)

 - Fully optimize out WARN_ON_FPU() (Eric Biggers)

 - Initial steps to support Support Intel APX (Advanced Performance Extensions)
   (Chang S. Bae)

 - Fix KASAN for arch_dup_task_struct() (Benjamin Berg)

 - Refine and simplify the FPU magic number check during signal return
   (Chang S. Bae)

 - Fix inconsistencies in guest FPU xfeatures (Chao Gao, Stanislav Spassov)

 - selftests/x86/xstate: Introduce common code for testing extended states
   (Chang S. Bae)

 - Misc fixes and cleanups (Borislav Petkov, Colin Ian King, Uros Bizjak)

 Thanks,

	Ingo

------------------>
Benjamin Berg (2):
      vmlinux.lds.h: Remove entry to place init_task onto init_stack
      x86/fpu: Avoid copying dynamic FP state from init_task in arch_dup_task_struct()

Borislav Petkov (AMD) (1):
      x86/fpu: Clarify the "xa" symbolic name used in the XSTATE* macros

Chang S. Bae (11):
      selftests/x86: Consolidate redundant signal helper functions
      selftests/x86/xstate: Refactor XSAVE helpers for general use
      selftests/x86/xstate: Enumerate and name xstate components
      selftests/x86/xstate: Refactor context switching test
      selftests/x86/xstate: Refactor ptrace ABI test
      selftests/x86/xstate: Introduce signal ABI test
      selftests/x86/xstate: Consolidate test invocations into a single entry
      selftests/x86/xstate: Clarify supported xstates
      selftests/x86/avx: Add AVX tests
      x86/fpu: Refine and simplify the magic number check during signal return
      x86/fpu/xstate: Simplify print_xstate_features()

Chao Gao (1):
      x86/fpu/xstate: Fix inconsistencies in guest FPU xfeatures

Colin Ian King (1):
      selftests/x86/xstate: Fix spelling mistake "hader" -> "header"

Eric Biggers (2):
      x86/fpu: Fully optimize out WARN_ON_FPU()
      x86/fpu: Improve crypto performance by making kernel-mode FPU reliably usable in softirqs

Stanislav Spassov (1):
      x86/fpu: Fix guest FPU state buffer allocation size

Uros Bizjak (1):
      x86/fpu: Use XSAVE{,OPT,C,S} and XRSTOR{,S} mnemonics in xstate.h


 arch/x86/include/asm/fpu/api.h                     |  17 +-
 arch/x86/kernel/fpu/core.c                         |  23 +-
 arch/x86/kernel/fpu/internal.h                     |   2 +-
 arch/x86/kernel/fpu/signal.c                       |  11 +-
 arch/x86/kernel/fpu/xstate.c                       |  30 +-
 arch/x86/kernel/fpu/xstate.h                       |  31 +-
 arch/x86/kernel/process.c                          |   7 +-
 include/asm-generic/vmlinux.lds.h                  |   1 -
 tools/testing/selftests/x86/Makefile               |   6 +-
 tools/testing/selftests/x86/amx.c                  | 442 +------------------
 tools/testing/selftests/x86/avx.c                  |  12 +
 .../testing/selftests/x86/corrupt_xstate_header.c  |  14 +-
 tools/testing/selftests/x86/entry_from_vm86.c      |  24 +-
 tools/testing/selftests/x86/fsgsbase.c             |  24 +-
 tools/testing/selftests/x86/helpers.h              |  28 ++
 tools/testing/selftests/x86/ioperm.c               |  25 +-
 tools/testing/selftests/x86/iopl.c                 |  25 +-
 tools/testing/selftests/x86/ldt_gdt.c              |  18 +-
 tools/testing/selftests/x86/mov_ss_trap.c          |  14 +-
 tools/testing/selftests/x86/ptrace_syscall.c       |  24 +-
 tools/testing/selftests/x86/sigaltstack.c          |  26 +-
 tools/testing/selftests/x86/sigreturn.c            |  24 +-
 tools/testing/selftests/x86/single_step_syscall.c  |  22 -
 tools/testing/selftests/x86/syscall_arg_fault.c    |  12 -
 tools/testing/selftests/x86/syscall_nt.c           |  12 -
 tools/testing/selftests/x86/sysret_rip.c           |  24 +-
 tools/testing/selftests/x86/test_vsyscall.c        |  13 -
 tools/testing/selftests/x86/unwind_vdso.c          |  12 -
 tools/testing/selftests/x86/xstate.c               | 477 +++++++++++++++++++++
 tools/testing/selftests/x86/xstate.h               | 195 +++++++++
 30 files changed, 812 insertions(+), 783 deletions(-)
 create mode 100644 tools/testing/selftests/x86/avx.c
 create mode 100644 tools/testing/selftests/x86/xstate.c
 create mode 100644 tools/testing/selftests/x86/xstate.h