From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id 39141B7B6A for ; Mon, 27 Jul 2009 10:19:12 +1000 (EST) Received: from e28smtp02.in.ibm.com (e28smtp02.in.ibm.com [59.145.155.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e28smtp02.in.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 518A0DDD04 for ; Mon, 27 Jul 2009 10:19:10 +1000 (EST) Received: from d28relay04.in.ibm.com (d28relay04.in.ibm.com [9.184.220.61]) by e28smtp02.in.ibm.com (8.14.3/8.13.1) with ESMTP id n6R0J25w015033 for ; Mon, 27 Jul 2009 05:49:02 +0530 Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay04.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n6R0J17q2584774 for ; Mon, 27 Jul 2009 05:49:01 +0530 Received: from d28av02.in.ibm.com (loopback [127.0.0.1]) by d28av02.in.ibm.com (8.13.1/8.13.3) with ESMTP id n6R0J1gZ021633 for ; Mon, 27 Jul 2009 10:19:01 +1000 Date: Mon, 27 Jul 2009 05:48:54 +0530 From: "K.Prasad" To: David Gibson , linuxppc-dev@ozlabs.org Subject: [Patch 5/6] Modify Data storage exception code to recognise DABR match first Message-ID: <20090727001854.GF13562@in.ibm.com> References: <20090726235854.574539012@prasadkr_t60p.in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Michael Neuling , Benjamin Herrenschmidt , paulus@samba.org, Alan Stern , "K.Prasad" , Roland McGrath List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Modify Data storage exception code to first lookout for a DABR match before recognising a kprobe or xmon exception. Signed-off-by: K.Prasad --- arch/powerpc/mm/fault.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) Index: linux-2.6-tip.hbkpt/arch/powerpc/mm/fault.c =================================================================== --- linux-2.6-tip.hbkpt.orig/arch/powerpc/mm/fault.c +++ linux-2.6-tip.hbkpt/arch/powerpc/mm/fault.c @@ -137,6 +137,12 @@ int __kprobes do_page_fault(struct pt_re error_code &= 0x48200000; else is_write = error_code & DSISR_ISSTORE; + + if (error_code & DSISR_DABRMATCH) { + /* DABR match */ + do_dabr(regs, address, error_code); + return 0; + } #else is_write = error_code & ESR_DST; #endif /* CONFIG_4xx || CONFIG_BOOKE */ @@ -151,14 +157,6 @@ int __kprobes do_page_fault(struct pt_re if (!user_mode(regs) && (address >= TASK_SIZE)) return SIGSEGV; -#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE)) - if (error_code & DSISR_DABRMATCH) { - /* DABR match */ - do_dabr(regs, address, error_code); - return 0; - } -#endif /* !(CONFIG_4xx || CONFIG_BOOKE)*/ - if (in_atomic() || mm == NULL) { if (!user_mode(regs)) return SIGSEGV;