linux-kernel - [PATCH 0/6] [GIT PULL] x86: Workaround for NMI iret woes

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Message-Id: <20111216225906.481643317@goodmis.org>
Date:	Fri, 16 Dec 2011 17:59:06 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: [PATCH 0/6] [GIT PULL] x86: Workaround for NMI iret woes

Ingo,

As there hasn't been much discussion about these patches, and I know
that Thomas would really like to get rid of the stop-machine requirement
for ftrace, jump_labels and kprobes, this is the required patch set
for such.

Nothing changed since the RFCs except I added the debug stack counter
to address the issue that Mathieu Desnoyers brought up.

I have the ftrace patches pretty much ready, but I would like to get
these in under the x86 branch. I hope to get this patch series into
3.3, and then I'll push the x86 ftrace patches on top of these for
3.4, along with jump_labels and kprobes.

I'll have ftrace patches that get all the infrastructure needed
for removing stop_machine() out for 3.3 too. This way I can let
powerpc use it and be our guinea pig ;)

Thanks!

-- Steve

Please pull the latest tip/x86/core tree, which can be found at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
tip/x86/core

Head SHA1: babcd54c41922214ff5dae3a6d832638d105f1d0

Linus Torvalds (1):
      x86: Do not schedule while still in NMI context

Steven Rostedt (5):
      x86: Document the NMI handler about not using paranoid_exit
      x86: Add workaround to NMI iret woes
      x86: Keep current stack in NMI breakpoints
      x86: Allow NMIs to hit breakpoints in i386
      x86: Add counter when debug stack is used with interrupts enabled

----
 arch/x86/include/asm/desc.h      |   12 ++
 arch/x86/include/asm/processor.h |   10 ++
 arch/x86/kernel/cpu/common.c     |   34 ++++++
 arch/x86/kernel/entry_64.S       |  208 ++++++++++++++++++++++++++++++++------
 arch/x86/kernel/head_64.S        |    4 +
 arch/x86/kernel/nmi.c            |  101 ++++++++++++++++++
 arch/x86/kernel/traps.c          |   20 ++++
 7 files changed, 356 insertions(+), 33 deletions(-)

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