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 CBCE1B8BCC for ; Fri, 4 Sep 2009 04:40:59 +1000 (EST) Received: from e28smtp06.in.ibm.com (e28smtp06.in.ibm.com [59.145.155.6]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e28smtp06.in.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id DFC31DDD0B for ; Fri, 4 Sep 2009 04:40:58 +1000 (EST) Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by e28smtp06.in.ibm.com (8.14.3/8.13.1) with ESMTP id n83IekBA026136 for ; Fri, 4 Sep 2009 00:10:46 +0530 Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n83IekGO1105984 for ; Fri, 4 Sep 2009 00:10:46 +0530 Received: from d28av04.in.ibm.com (loopback [127.0.0.1]) by d28av04.in.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id n83Iej29014904 for ; Fri, 4 Sep 2009 04:40:46 +1000 Date: Fri, 4 Sep 2009 00:10:43 +0530 From: "K.Prasad" To: David Gibson , linuxppc-dev@ozlabs.org Subject: [Patch 5/6] PPC64-HWBKPT: Modify Data storage exception code to recognise DABR match first Message-ID: <20090903184043.GF4590@in.ibm.com> References: <20090903183306.875398457@xyz> 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;