linux-kernel - [PATCH 0/2] x86: NMI vs paravirt fixes

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Message-Id: <cover.1442791737.git.luto@kernel.org>
Date:	Sun, 20 Sep 2015 16:32:03 -0700
From:	Andy Lutomirski <luto@...nel.org>
To:	x86@...nel.org
Cc:	Sasha Levin <sasha.levin@...cle.com>, linux-kernel@...r.kernel.org,
	Andy Lutomirski <luto@...nel.org>
Subject: [PATCH 0/2] x86: NMI vs paravirt fixes

These are for x86/urgent.

This fixes at least one problem that Sasha can trigger using some
crazy configuration + Trinity.  I can't reproduce the full file of
nastiness that he's seeing, but these patches both look legit to me,
they fix what look like real bugs, and they seem to help Sasha's
tests.

Patch 1 is ugly.  Feel free to tell me to shove the asm into the
entry asm files, although that will involve duplicating it for
32-bit and 64-bit kernels.

Andy Lutomirski (2):
  x86/paravirt: Replace the paravirt nop with a bona fide empty function
  x86/nmi/64: Fix a paravirt stack-clobbering bug in the NMI code

 arch/x86/entry/entry_64.S  | 16 +++++++++++++++-
 arch/x86/kernel/paravirt.c | 16 ++++++++++++----
 2 files changed, 27 insertions(+), 5 deletions(-)

-- 
2.4.3

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