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From: "H. Peter Anvin" <hpa@zytor.com>
To: Mikael Pettersson <mikpe@it.uu.se>
Cc: Andi Kleen <andi@firstfloor.org>,
	Suresh Siddha <suresh.b.siddha@intel.com>,
	mingo@elte.hu, tglx@linutronix.de, torvalds@linux-foundation.org,
	akpm@linux-foundation.org, roland@redhat.com, drepper@redhat.com,
	Hongjiu.lu@intel.com, linux-kernel@vger.kernel.org,
	arjan@linux.intel.com, rmk+lkml@arm.linux.org.uk, dan@debian.org,
	asit.k.mallick@intel.com
Subject: Re: [RFC] x86: xsave/xrstor support, ucontext_t extensions
Date: Tue, 20 May 2008 10:57:04 -0700	[thread overview]
Message-ID: <483310F0.5030902@zytor.com> (raw)
In-Reply-To: <18482.60491.764019.292031@harpo.it.uu.se>

Mikael Pettersson wrote:
> 
> An ugly workaround could be to start clearing one of these fields,
> and say that the data there is only valid for kernels >= 2.6.26.
> (I said it was ugly...)
> 
> Or we go back to stashing a flag in uc_flags (which is kosher),
> and try to figure out how to mark non-rt sigframes.
> 

Or use the OSXSAVE hack.  Let me think about this for some time.

There is also the option of simply using a field guarded by a 64- or 
128-bit magic number.  It's a bit ugly, but it works.

	-hpa

  parent reply	other threads:[~2008-05-20 18:01 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-13  1:10 [RFC] x86: xsave/xrstor support, ucontext_t extensions Suresh Siddha
2008-05-16 13:26 ` Mikael Pettersson
2008-05-18  1:34   ` Suresh Siddha
2008-05-19 14:52     ` Mikael Pettersson
2008-05-19 15:04       ` Andi Kleen
2008-05-19 16:29       ` H. Peter Anvin
2008-05-19 16:57         ` Suresh Siddha
2008-05-19 17:45           ` H. Peter Anvin
2008-05-20  1:57       ` Suresh Siddha
2008-05-20  8:58         ` Mikael Pettersson
2008-05-20 10:01         ` Andi Kleen
2008-05-20 13:19           ` Mikael Pettersson
2008-05-20 14:58             ` H. Peter Anvin
2008-05-20 15:20               ` Mikael Pettersson
2008-05-20 17:53                 ` Suresh Siddha
2008-05-20 17:59                   ` H. Peter Anvin
2008-05-22  0:28                   ` H. Peter Anvin
2008-05-22  0:53                     ` Roland McGrath
2008-05-22  1:38                       ` H. Peter Anvin
2008-05-22  6:40                         ` Roland McGrath
2008-05-22  7:18                           ` H. Peter Anvin
2008-05-22  8:49                       ` Mikael Pettersson
2008-05-22  8:57                     ` Mikael Pettersson
2008-05-22 20:56                       ` Suresh Siddha
2008-05-22 21:02                         ` H. Peter Anvin
2008-05-22 21:29                           ` Suresh Siddha
2008-05-22 21:34                             ` H. Peter Anvin
2008-05-22 22:22                               ` Mikael Pettersson
2008-05-23  1:48                               ` Suresh Siddha
2008-05-23  2:12                                 ` Roland McGrath
2008-05-23  2:49                                   ` H. Peter Anvin
2008-05-23 18:09                                     ` Suresh Siddha
2008-06-06  0:28                                       ` x86: xsave/xrstor support; " H. Peter Anvin
2008-06-06 20:14                                         ` Suresh Siddha
2008-06-06 23:03                                           ` H. Peter Anvin
2008-05-23  2:45                                 ` [RFC] x86: xsave/xrstor support, " H. Peter Anvin
2008-05-23 11:46                                   ` Mikael Pettersson
2008-05-23 12:11                                     ` Andi Kleen
2008-05-22 21:32                           ` Chris Wright
2008-05-22 22:15                             ` Mikael Pettersson
2008-05-22 22:29                               ` Chris Wright
2008-05-23  0:32                                 ` H. Peter Anvin
2008-05-23  0:44                                   ` Chris Wright
2008-05-22 22:36                           ` Mikael Pettersson
2008-05-23  0:33                             ` H. Peter Anvin
2008-05-23  0:42                               ` Suresh Siddha
2008-05-23  1:33                                 ` Roland McGrath
2008-05-23 16:57                                   ` H. Peter Anvin
2008-05-23 17:50                                     ` Suresh Siddha
2008-05-23  2:27                                 ` H. Peter Anvin
2008-05-20 17:57                 ` H. Peter Anvin [this message]
2008-05-20 14:55           ` H. Peter Anvin
2008-05-20 15:03             ` Andi Kleen
2008-05-20 20:10               ` Roland McGrath
2008-05-22  0:05                 ` H. Peter Anvin
2008-05-22  0:47                   ` Roland McGrath
2008-05-22  8:14                     ` Andi Kleen

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