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* [patch 00/31] x86/fpu: Preparatory cleanups for AMX support (part 1)
@ 2021-10-11 23:59 Thomas Gleixner
  2021-10-11 23:59 ` [patch 01/31] x86/fpu: Remove pointless argument from switch_fpu_finish() Thomas Gleixner
                   ` (31 more replies)
  0 siblings, 32 replies; 96+ messages in thread
From: Thomas Gleixner @ 2021-10-11 23:59 UTC (permalink / raw)
  To: LKML; +Cc: x86, Chang S. Bae, Dave Hansen, Arjan van de Ven, kvm, Paolo Bonzini

The recent attempts to support the new AMX feature just tried to bolt it
into the exisiting FPU code:

     https://lore.kernel.org/r/20211001223728.9309-1-chang.seok.bae@intel.com

As demonstrated with the supervisor bits, that's not really sensible and
leads to similar issues.

I've worked with Chang and Dave in the past few days on sorting this
out. Many thanks for their effort and support!

This series is a renewed effort to make this more palatable. It's the first
part of a 4 part submission which work towards a clean AMX integration into
the FPU code:

  1) Cleans up existing mess. Historical leftovers, shortcomings and
     especially the universal kitchen sink asm/fpu/internal.h which is
     included all over the place for the wrong reasons.

     This series has a value independent of AMX, but allows to make the
     integration and conversion to the new world order of dynamically
     enabled feature bits simpler.

  2) Introduces a container for the actual register storage which carries
     information about the kernel and user space features and sizes
     supported by it to easy the integration of dynamically enabled feature
     and the resulting different buffer sizes.

  3) Replaces a ton of state variables by introducing structures which
     carry that information

  4) The actual AMX and dynamic feature enable bits which have been
     significantly reworked on top of #1 - #3 and to address shortcomings
     of the previous submissions.

The current series (#1) is based on:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/fpu

and also available from git:

   git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git x86/fpu-1

The full series which has #1-#4 included can be found at:

   git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git x86/fpu

Thanks,

	tglx
---
 arch/x86/events/perf_event.h        |    1 
 arch/x86/ia32/ia32_signal.c         |    1 
 arch/x86/include/asm/fpu/api.h      |   31 ++
 arch/x86/include/asm/fpu/internal.h |  530 ------------------------------------
 arch/x86/include/asm/fpu/signal.h   |   13 
 arch/x86/include/asm/fpu/xcr.h      |   11 
 arch/x86/include/asm/fpu/xstate.h   |    6 
 arch/x86/include/asm/pkru.h         |    2 
 arch/x86/kernel/cpu/bugs.c          |    2 
 arch/x86/kernel/cpu/common.c        |    2 
 arch/x86/kernel/fpu/bugs.c          |    2 
 arch/x86/kernel/fpu/core.c          |  163 ++++++++---
 arch/x86/kernel/fpu/init.c          |   29 -
 arch/x86/kernel/fpu/regset.c        |    6 
 arch/x86/kernel/fpu/signal.c        |   21 -
 arch/x86/kernel/fpu/xstate.c        |  164 ++++++-----
 arch/x86/kernel/process.c           |    6 
 arch/x86/kernel/process_32.c        |    5 
 arch/x86/kernel/process_64.c        |    5 
 arch/x86/kernel/ptrace.c            |    1 
 arch/x86/kernel/sev.c               |    2 
 arch/x86/kernel/signal.c            |    1 
 arch/x86/kernel/smpboot.c           |    2 
 arch/x86/kernel/traps.c             |    2 
 arch/x86/kvm/svm/sev.c              |    2 
 arch/x86/kvm/vmx/vmx.c              |    2 
 arch/x86/kvm/x86.c                  |  192 +------------
 arch/x86/math-emu/fpu_entry.c       |    2 
 arch/x86/mm/extable.c               |    4 
 arch/x86/power/cpu.c                |    2 
 b/arch/x86/include/asm/fpu/sched.h  |   68 ++++
 b/arch/x86/kernel/fpu/context.h     |   85 +++++
 b/arch/x86/kernel/fpu/internal.h    |   30 ++
 b/arch/x86/kernel/fpu/legacy.h      |  115 +++++++
 b/arch/x86/kernel/fpu/xstate.h      |  198 +++++++++++++
 35 files changed, 822 insertions(+), 886 deletions(-)

^ permalink raw reply	[flat|nested] 96+ messages in thread

end of thread, other threads:[~2021-11-22  8:50 UTC | newest]

Thread overview: 96+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-10-11 23:59 [patch 00/31] x86/fpu: Preparatory cleanups for AMX support (part 1) Thomas Gleixner
2021-10-11 23:59 ` [patch 01/31] x86/fpu: Remove pointless argument from switch_fpu_finish() Thomas Gleixner
2021-10-12  0:00 ` [patch 02/31] x86/fpu: Update stale comments Thomas Gleixner
2021-10-12  0:00 ` [patch 03/31] x86/pkru: Remove useless include Thomas Gleixner
2021-10-12  0:00 ` [patch 04/31] x86/fpu: Restrict xsaves()/xrstors() to independent states Thomas Gleixner
2021-10-12 14:24   ` Borislav Petkov
2021-10-12  0:00 ` [patch 05/31] x86/fpu: Cleanup the on_boot_cpu clutter Thomas Gleixner
2021-10-12  0:00 ` [patch 06/31] x86/fpu: Remove pointless memset in fpu_clone() Thomas Gleixner
2021-10-12  0:00 ` [patch 07/31] x86/process: Clone FPU in copy_thread() Thomas Gleixner
2021-10-12  0:00 ` [patch 08/31] x86/fpu: Do not inherit FPU context for kernel and IO worker threads Thomas Gleixner
2021-10-12  0:00 ` [patch 09/31] x86/fpu: Do not inherit FPU context for CLONE_THREAD Thomas Gleixner
2021-10-12 16:10   ` Borislav Petkov
2021-10-12 18:52     ` Thomas Gleixner
2021-10-12 19:01       ` Thomas Gleixner
2021-10-12  0:00 ` [patch 10/31] x86/fpu: Cleanup xstate xcomp_bv initialization Thomas Gleixner
2021-10-12  0:00 ` [patch 11/31] x86/fpu/xstate: Provide and use for_each_xfeature() Thomas Gleixner
2021-10-12 16:45   ` Borislav Petkov
2021-10-12  0:00 ` [patch 12/31] x86/fpu/xstate: Mark all init only functions __init Thomas Gleixner
2021-10-12  0:00 ` [patch 13/31] x86/fpu: Move KVMs FPU swapping to FPU core Thomas Gleixner
2021-10-12 16:53   ` Borislav Petkov
2021-10-12 18:25     ` Thomas Gleixner
2021-10-12 18:26       ` Thomas Gleixner
2021-10-12 17:22   ` Paolo Bonzini
2021-10-13  6:15     ` Liu, Jing2
2021-10-13  6:26       ` Paolo Bonzini
2021-10-13  7:46         ` Liu, Jing2
2021-10-13  8:42           ` Paolo Bonzini
2021-10-13 10:14             ` Andy Lutomirski
2021-10-13 12:26               ` Paolo Bonzini
2021-10-13 14:14                 ` Thomas Gleixner
2021-10-13 14:24                   ` Thomas Gleixner
2021-10-13 14:59                 ` Andy Lutomirski
2021-10-13 15:05                   ` Paolo Bonzini
2021-10-13 10:25             ` Liu, Jing2
2021-10-13 12:37               ` Paolo Bonzini
2021-10-13 14:06             ` Thomas Gleixner
2021-10-14  6:50               ` Paolo Bonzini
2021-10-14  8:02                 ` Liu, Jing2
2021-10-14  9:01                   ` Paolo Bonzini
2021-10-14 11:21                     ` Liu, Jing2
2021-10-14 11:33                       ` Paolo Bonzini
2021-10-14 11:30                     ` Liu, Jing2
2021-10-14 11:39                       ` Paolo Bonzini
2021-11-22  8:50                         ` Liu, Jing2
2021-10-14 14:09                     ` Thomas Gleixner
2021-10-14 14:37                       ` Thomas Gleixner
2021-10-14 15:01                       ` Paolo Bonzini
2021-10-14 19:14                         ` Thomas Gleixner
2021-10-15  9:20                           ` Liu, Jing2
2021-10-15  9:36                           ` Thomas Gleixner
2021-10-15 14:24                             ` Liu, Jing2
2021-10-15 15:53                               ` Paolo Bonzini
2021-10-16 14:45                               ` Thomas Gleixner
2021-10-15  9:00                         ` Liu, Jing2
2021-10-15 10:50                           ` Thomas Gleixner
2021-10-15 11:17                             ` Paolo Bonzini
2021-10-15 13:01                             ` Liu, Jing2
2021-10-14 12:23                 ` Thomas Gleixner
2021-10-14 12:26                   ` Paolo Bonzini
2021-10-14 14:23                     ` Thomas Gleixner
2021-10-13 15:12       ` Thomas Gleixner
2021-10-14  8:21         ` Liu, Jing2
2021-10-14 13:08           ` Thomas Gleixner
2021-10-12  0:00 ` [patch 14/31] x86/fpu: Replace KVMs homebrewn FPU copy from user Thomas Gleixner
2021-10-12 17:00   ` Borislav Petkov
2021-10-13 14:57     ` Sean Christopherson
2021-10-13 15:12       ` Paolo Bonzini
2021-10-13 15:16       ` Thomas Gleixner
2021-10-12 17:30   ` Paolo Bonzini
2021-10-12  0:00 ` [patch 15/31] x86/fpu: Rework copy_xstate_to_uabi_buf() Thomas Gleixner
2021-10-12 17:30   ` Paolo Bonzini
2021-10-12  0:00 ` [patch 16/31] x86/fpu: Replace KVMs homebrewn FPU copy to user Thomas Gleixner
2021-10-12 17:10   ` Borislav Petkov
2021-10-12 17:36   ` Paolo Bonzini
2021-10-12 17:47     ` Thomas Gleixner
2021-10-12 18:40       ` [patch V2 16/31] x86/fpu: Replace KVMs home brewed " Thomas Gleixner
2021-10-13  5:34       ` [patch 16/31] x86/fpu: Replace KVMs homebrewn " Paolo Bonzini
2021-10-12  0:00 ` [patch 17/31] x86/fpu: Mark fpu__init_prepare_fx_sw_frame() as __init Thomas Gleixner
2021-10-12  0:00 ` [patch 18/31] x86/fpu: Move context switch and exit to user inlines into sched.h Thomas Gleixner
2021-10-12  0:00 ` [patch 19/31] x86/fpu: Clean up cpu feature tests Thomas Gleixner
2021-10-12  0:00 ` [patch 20/31] x86/fpu: Make os_xrstor_booting() private Thomas Gleixner
2021-10-12  0:00 ` [patch 21/31] x86/fpu: Move os_xsave() and os_xrstor() to core Thomas Gleixner
2021-10-12  0:00 ` [patch 22/31] x86/fpu: Move legacy ASM wrappers " Thomas Gleixner
2021-10-12  0:00 ` [patch 23/31] x86/fpu: Make WARN_ON_FPU() private Thomas Gleixner
2021-10-12  0:00 ` [patch 24/31] x86/fpu: Move fpregs_restore_userregs() to core Thomas Gleixner
2021-10-12 17:32   ` Borislav Petkov
2021-10-12  0:00 ` [patch 25/31] x86/fpu: Move mxcsr related code " Thomas Gleixner
2021-10-12  0:00 ` [patch 26/31] x86/fpu: Move fpstate functions to api.h Thomas Gleixner
2021-10-12 17:46   ` Borislav Petkov
2021-10-12  0:00 ` [patch 27/31] x86/fpu: Remove internal.h dependency from fpu/signal.h Thomas Gleixner
2021-10-12  0:00 ` [patch 28/31] x86/sev: Include fpu/xcr.h Thomas Gleixner
2021-10-12  7:24   ` Xiaoyao Li
2021-10-12  0:00 ` [patch 29/31] x86/fpu: Mop up the internal.h leftovers Thomas Gleixner
2021-10-12  0:00 ` [patch 30/31] x86/fpu: Replace the includes of fpu/internal.h Thomas Gleixner
2021-10-12  0:00 ` [patch 31/31] x86/fpu: Provide a proper function for ex_handler_fprestore() Thomas Gleixner
2021-10-12 21:15 ` [patch 00/31] x86/fpu: Preparatory cleanups for AMX support (part 1) Thomas Gleixner

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