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* [patch V4 part 4 00/24] x86/entry: Entry/exception code rework, nasty exceptions
@ 2020-05-05 13:49 Thomas Gleixner
  2020-05-05 13:49 ` [patch V4 part 4 01/24] x86/int3: Ensure that poke_int3_handler() is not traced Thomas Gleixner
                   ` (23 more replies)
  0 siblings, 24 replies; 94+ messages in thread
From: Thomas Gleixner @ 2020-05-05 13:49 UTC (permalink / raw)
  To: LKML
  Cc: x86, Paul E. McKenney, Andy Lutomirski, Alexandre Chartre,
	Frederic Weisbecker, Paolo Bonzini, Sean Christopherson,
	Masami Hiramatsu, Petr Mladek, Steven Rostedt, Joel Fernandes,
	Boris Ostrovsky, Juergen Gross, Brian Gerst, Mathieu Desnoyers,
	Josh Poimboeuf, Will Deacon

Folks,

This is the forth part of the rework series. Part 3 can be found here:

 https://lore.kernel.org/r/20200505134354.774943181@linutronix.de

The series has a total of 138 patches and is split into 5 parts. The base
for this 4th series is:

  git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-3

The full series with all parts applied is available here:

  git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-5

The forth part, i.e. this series is available from:

  git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-4
 
This part contains the modifications for complex and nasty exceptions and traps:

 - Conversion of int3 including a full isolation of the text poke handler
   so it is fully self contained, i.e does not call out into any
   instrumentable code.

 - Conversion of NMI handling including protection against instrumentation

 - Conversion of #DB with separation of the user and kernel mode entries

 - Conversion of #MC and #DF

The objtool check for the noinstr.text correctness is not yet added to the
build machinery and has to be invoked manually for now:

   objtool check -fal vmlinux.o

The checking only works for builtin code as objtool cannot do a combined
analysis of vmlinux.o and a module.o

Thanks,

	tglx

8<----------
 arch/x86/entry/entry_32.S            |   38 ----
 arch/x86/entry/entry_64.S            |   35 +---
 arch/x86/include/asm/desc.h          |    8 
 arch/x86/include/asm/idtentry.h      |  235 +++++++++++++++++++++++++++++
 arch/x86/include/asm/mce.h           |    2 
 arch/x86/include/asm/ptrace.h        |    2 
 arch/x86/include/asm/text-patching.h |   11 -
 arch/x86/include/asm/traps.h         |   23 --
 arch/x86/kernel/alternative.c        |   25 +--
 arch/x86/kernel/cpu/common.c         |    6 
 arch/x86/kernel/cpu/mce/core.c       |   91 ++++++++---
 arch/x86/kernel/cpu/mce/inject.c     |    4 
 arch/x86/kernel/cpu/mce/internal.h   |    2 
 arch/x86/kernel/cpu/mce/p5.c         |    8 
 arch/x86/kernel/cpu/mce/winchip.c    |    8 
 arch/x86/kernel/doublefault_32.c     |   10 -
 arch/x86/kernel/hw_breakpoint.c      |    6 
 arch/x86/kernel/idt.c                |   22 +-
 arch/x86/kernel/nmi.c                |   14 -
 arch/x86/kernel/traps.c              |  283 ++++++++++++++++++++++++-----------
 arch/x86/kvm/vmx/vmx.c               |    2 
 arch/x86/xen/enlighten_pv.c          |   17 +-
 arch/x86/xen/xen-asm_64.S            |   12 -
 include/linux/bsearch.h              |   26 ++-
 kernel/time/timekeeping.c            |    2 
 lib/bsearch.c                        |   22 --
 26 files changed, 615 insertions(+), 299 deletions(-)

^ permalink raw reply	[flat|nested] 94+ messages in thread

end of thread, other threads:[~2020-05-19 20:02 UTC | newest]

Thread overview: 94+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-05 13:49 [patch V4 part 4 00/24] x86/entry: Entry/exception code rework, nasty exceptions Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 01/24] x86/int3: Ensure that poke_int3_handler() is not traced Thomas Gleixner
2020-05-14  4:57   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 02/24] x86/int3: Avoid atomic instrumentation Thomas Gleixner
2020-05-08 13:27   ` Masami Hiramatsu
2020-05-14  4:57   ` Andy Lutomirski
2020-05-14  9:32     ` Peter Zijlstra
2020-05-14 12:51       ` Thomas Gleixner
2020-05-14 13:15         ` Peter Zijlstra
2020-05-14 14:55           ` Andy Lutomirski
2020-05-14 15:06           ` Thomas Gleixner
2020-05-14 15:08             ` Andy Lutomirski
2020-05-14 15:10               ` Peter Zijlstra
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 03/24] lib/bsearch: Provide __always_inline variant Thomas Gleixner
2020-05-14  4:58   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 04/24] x86/int3: Inline bsearch() Thomas Gleixner
2020-05-14  4:58   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 05/24] x86/entry: Provide IDTENTRY_RAW Thomas Gleixner
2020-05-14  4:59   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 06/24] x86/entry: Convert INT3 exception to IDTENTRY_RAW Thomas Gleixner
2020-05-14  5:01   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 07/24] x86/traps: Split int3 handler up Thomas Gleixner
2020-05-14  5:03   ` Andy Lutomirski
2020-05-14  9:39     ` Peter Zijlstra
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 08/24] x86/entry: Provide IDTENTRY_IST Thomas Gleixner
2020-05-14 16:39   ` Andy Lutomirski
2020-05-14 18:44     ` Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 09/24] x86/mce: Move nmi_enter/exit() into the entry point Thomas Gleixner
2020-05-15  5:23   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 10/24] x86/entry: Convert Machine Check to IDTENTRY_IST Thomas Gleixner
2020-05-15  5:24   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 11/24] x86/mce: Use untraced rd/wrmsr in the MCE offline/crash check Thomas Gleixner
2020-05-15  5:24   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 12/24] x86/idtentry: Provide IDTENTRY_XEN for XEN/PV Thomas Gleixner
2020-05-15  5:25   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 13/24] x86/entry: Convert NMI to IDTENTRY_NMI Thomas Gleixner
2020-05-15  5:26   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 14/24] x86/nmi: Protect NMI entry against instrumentation Thomas Gleixner
2020-05-15  5:26   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 15/24] x86/db: Split out dr6/7 handling Thomas Gleixner
2020-05-07 17:18   ` Alexandre Chartre
2020-05-08  8:59     ` Peter Zijlstra
2020-05-08 11:58       ` Thomas Gleixner
2020-05-08 12:45         ` Peter Zijlstra
2020-05-14  2:24   ` Mathieu Desnoyers
2020-05-14 17:28     ` Thomas Gleixner
2020-05-14 17:46       ` Mathieu Desnoyers
2020-05-15 14:32         ` Thomas Gleixner
2020-05-14 18:06     ` Steven Rostedt
2020-05-15  5:37   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 16/24] x86/entry: Convert Debug exception to IDTENTRY_DB Thomas Gleixner
2020-05-15  5:27   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 17/24] x86/entry/64: Remove error code clearing from #DB and #MCE ASM stub Thomas Gleixner
2020-05-15  5:27   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 18/24] x86/entry: Provide IDTRENTRY_NOIST variants for #DB and #MC Thomas Gleixner
2020-05-15  5:29   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 19/24] x86/entry: Implement user mode C entry points for #DB and #MCE Thomas Gleixner
2020-05-15  5:32   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 20/24] x86/traps: Restructure #DB handling Thomas Gleixner
2020-05-15  5:39   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 21/24] x86/traps: Address objtool noinstr complaints in #DB Thomas Gleixner
2020-05-15  5:39   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 22/24] x86/mce: Address objtools noinstr complaints Thomas Gleixner
2020-05-15  5:40   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 23/24] x86/entry: Provide IDTENTRY_DF Thomas Gleixner
2020-05-15  5:41   ` Andy Lutomirski
2020-05-15 15:01     ` Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] x86/entry: Convert double fault exception to IDTENTRY_DF tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 24/24] " Thomas Gleixner
2020-05-07 19:55   ` Alexandre Chartre
2020-05-15  5:42   ` Andy Lutomirski

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