Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932544Ab3DZBH0 (ORCPT ); Thu, 25 Apr 2013 21:07:26 -0400 Received: from intranet.asianux.com ([58.214.24.6]:19163 "EHLO intranet.asianux.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932409Ab3DZBHZ (ORCPT ); Thu, 25 Apr 2013 21:07:25 -0400 X-Spam-Score: -100.8 Message-ID: <5179D302.9060203@asianux.com> Date: Fri, 26 Apr 2013 09:06:10 +0800 From: Chen Gang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: Michael Neuling CC: Mike Qiu , Paul Mackerras , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, sfr@canb.auug.org.au, matt@ozlabs.org, linux-kernel@vger.kernel.org, "Aneesh Kumar K.V" Subject: Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area References: <5177965D.9090406@linux.vnet.ibm.com> <20130424083142.GB26834@concordia> <51779941.8080403@linux.vnet.ibm.com> <30651.1366799858@ale.ozlabs.ibm.com> <1366807638.5911.2.camel@localhost> <5178816D.3000309@asianux.com> <5178ABA2.4030109@linux.vnet.ibm.com> <20130425062539.GA421@iris.ozlabs.ibm.com> <517918AB.4020508@asianux.com> <30269.1366931768@ale.ozlabs.ibm.com> In-Reply-To: <30269.1366931768@ale.ozlabs.ibm.com> Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1508 Lines: 51 On 2013??04??26?? 07:16, Michael Neuling wrote: >> > diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S >> > index e789ee7..8997de2 100644 >> > --- a/arch/powerpc/kernel/exceptions-64s.S >> > +++ b/arch/powerpc/kernel/exceptions-64s.S >> > @@ -254,7 +254,11 @@ hardware_interrupt_hv: >> > STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable) >> > KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800) >> > >> > - MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer) >> > + . = 0x900 >> > + .globl decrementer_pSeries >> > +decrementer_pSeries: >> > + b decrementer_pSeries_0 >> > + > Unfortunately you can't do this ether as we need to save the CFAR[1] > before it's overwritten by any branch. MASKABLE_EXCEPTION_PSERIES does > this. > Thanks for your checking. > CFAR is the Come From Register. It saves the location of the last > branch and is hence overwritten by any branch. > Do we process it just like others done (e.g. 0x300, 0xe00, 0xe20 ...) ? . = 0x900 .globl decrementer_pSeries decrementer_pSeries: HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) b decrementer_pSeries_0 ... > Thanks for trying. > Not at all, before get fixed by other members, I should continue trying. -- Chen Gang Asianux Corporation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/