From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, "Borislav Petkov" <bp@alien8.de>,
"Brian Gerst" <brgerst@gmail.com>,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"Andy Lutomirski" <luto@kernel.org>
Subject: [PATCH v2 0/2] x86/entry: Do context tracking with IRQs off (finally!)
Date: Wed, 9 Mar 2016 13:24:03 -0800 [thread overview]
Message-ID: <cover.1457558566.git.luto@kernel.org> (raw)
This provides no direct benefit by itself, but it finally lets us
apply some of the speedups that Paolo and possible Rik independently
wrote: we won't need an irqsave/irqrestore pair in the context
tracking code.
It should also let us remove the last callers of exception_enter in
x86 kernels, but that removal should probably wait until I carefully
re-read the page fault code.
Changes from v1:
- Fix a comment
- Make the ifdeffery less messy
Andy Lutomirski (2):
x86/entry/32: Change INT80 to be an interrupt gate
x86/entry: Do enter_from_user_mode with IRQs off
arch/x86/entry/common.c | 48 +++++++++++---------------------------
arch/x86/entry/entry_32.S | 8 +++----
arch/x86/entry/entry_64_compat.S | 2 +-
arch/x86/include/asm/thread_info.h | 5 +++-
arch/x86/kernel/traps.c | 2 +-
5 files changed, 24 insertions(+), 41 deletions(-)
--
2.5.0
next reply other threads:[~2016-03-09 21:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-09 21:24 Andy Lutomirski [this message]
2016-03-09 21:24 ` [PATCH v2 1/2] x86/entry/32: Change INT80 to be an interrupt gate Andy Lutomirski
2016-03-10 11:06 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2016-03-09 21:24 ` [PATCH v2 2/2] x86/entry: Do enter_from_user_mode with IRQs off Andy Lutomirski
2016-03-10 11:07 ` [tip:x86/asm] x86/entry: Call enter_from_user_mode() " tip-bot for Andy Lutomirski
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