From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id DE6ADDDF9D for ; Sat, 13 Jan 2007 08:27:49 +1100 (EST) Subject: Re: [patch][5/5] powerpc: Add the general support for Embedded Floating-Point instructions From: Benjamin Herrenschmidt To: Kumar Gala In-Reply-To: <615F9884-6695-485A-A4B4-A53BD98F969E@kernel.crashing.org> References: <32F3CC26D4DAC44E8ECD07155727A46E816A47@zch01exm20.fsl.freescale.net> <1168599942.5011.21.camel@localhost.localdomain> <1168635154.5011.31.camel@localhost.localdomain> <615F9884-6695-485A-A4B4-A53BD98F969E@kernel.crashing.org> Content-Type: text/plain Date: Fri, 12 Jan 2007 21:27:57 +0000 Message-Id: <1168637277.5011.36.camel@localhost.localdomain> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org, paulus@samba.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , > I think its a fair assumption that nothing is going to interrupt the > handling of the exception, so its safe to assume the process causing > the interrupt will be the same one we return to. What about the get_user to get to the faulting instruction ? I suppose if those processors are UP only and we use an exception with EE disabled, there should be no way the page has been evicted since the access, so that should work, but will that ever be true ? Ben.