From: Andi Kleen <ak@linux.intel.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: Ian Campbell <ian.campbell@citrix.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>, Brian Gerst <brgerst@gmail.com>,
Jan Beulich <JBeulich@novell.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Frederic Weisbecker <fweisbec@gmail.com>,
x86@kernel.org, Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 1/3] x86: drop unnecessary kernel_eflags variable from 64 bit.
Date: Wed, 6 Jul 2011 16:17:11 -0700 [thread overview]
Message-ID: <20110706231711.GA11595@tassilo.jf.intel.com> (raw)
In-Reply-To: <CAOJsxLFjdrrnx4gZjDJQuf3GBHeKvKb91TajYBkMu+PgSWtM5A@mail.gmail.com>
> Well lets ask Linus and Andi?
The original idea was that if someone extends EFLAGS with new bits
the BIOS could set them. Strictly said the Intel Manual
specifies that ("reserved bits -- always set to values previously read")
But that never really worked out and I don't think anyone
would dare extending it now. So hardcoding is fine I guess.
-Andi
next prev parent reply other threads:[~2011-07-06 23:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-05 10:47 [Q x86-64] on kernel_eflags Cyrill Gorcunov
2011-07-05 11:00 ` Ian Campbell
2011-07-05 11:15 ` Cyrill Gorcunov
2011-07-05 13:00 ` [PATCH 1/3] x86: drop unnecessary kernel_eflags variable from 64 bit Ian Campbell
2011-07-05 13:28 ` Cyrill Gorcunov
2011-07-06 9:25 ` Ian Campbell
2011-07-06 9:46 ` Cyrill Gorcunov
2011-07-06 9:57 ` Ian Campbell
2011-07-06 10:12 ` Cyrill Gorcunov
2011-07-06 9:39 ` Pekka Enberg
2011-07-06 23:17 ` Andi Kleen [this message]
2011-07-07 0:00 ` H. Peter Anvin
2011-07-05 13:00 ` [PATCH 2/3] x86: make 64 bit ret_from_fork a little more similar to 32 bit Ian Campbell
2011-07-06 9:41 ` Pekka Enberg
2011-07-05 13:00 ` [PATCH 3/3] x86: ret_from_fork: use symbolic contants for bits in EFLAGS Ian Campbell
2011-07-06 9:36 ` Pekka Enberg
2011-07-05 17:47 ` [Q x86-64] on kernel_eflags H. Peter Anvin
2011-07-05 17:56 ` Cyrill Gorcunov
2011-07-06 9:25 ` Ian Campbell
-- strict thread matches above, loose matches on Subject: below --
2011-07-25 9:58 [PATCH 0/3] minor cleanups to EFLAGS initialisation in ret_from_fork Ian Campbell
2011-07-25 10:03 ` [PATCH 1/3] x86: drop unnecessary kernel_eflags variable from 64 bit Ian Campbell
2010-02-09 15:56 [PATCH 0/3] x86: slightly unify ret_from_fork Ian Campbell
2010-02-09 15:56 ` [PATCH 1/3] x86: drop unnecessary kernel_eflags variable from 64 bit Ian Campbell
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