From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,UPPERCASE_50_75,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48FC3C433ED for ; Wed, 5 May 2021 04:49:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1CC0C613B4 for ; Wed, 5 May 2021 04:49:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231623AbhEEEuJ (ORCPT ); Wed, 5 May 2021 00:50:09 -0400 Received: from pegase2.c-s.fr ([93.17.235.10]:49503 "EHLO pegase2.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229895AbhEEEuI (ORCPT ); Wed, 5 May 2021 00:50:08 -0400 Received: from localhost (mailhub3.si.c-s.fr [172.26.127.67]) by localhost (Postfix) with ESMTP id 4FZkkt387cz9sWs; Wed, 5 May 2021 06:49:10 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase2.c-s.fr ([172.26.127.65]) by localhost (pegase2.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YqPLq18KB6Pc; Wed, 5 May 2021 06:49:10 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase2.c-s.fr (Postfix) with ESMTP id 4FZkkt24rdz9sWq; Wed, 5 May 2021 06:49:10 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 4FAD28B7B8; Wed, 5 May 2021 06:49:09 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id MlrGRD_86eaG; Wed, 5 May 2021 06:49:08 +0200 (CEST) Received: from [192.168.4.90] (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 6BBBE8B7B4; Wed, 5 May 2021 06:49:07 +0200 (CEST) Subject: Re: [PATCH 1/2] powerpc/asm-offset: Remove unused items related to paca From: Christophe Leroy To: Nicholas Piggin , Benjamin Herrenschmidt , Michael Ellerman , Paul Mackerras Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org References: <1620121538.q0b7uiea5y.astroid@bobo.none> <9b07e9c1-b004-a814-278b-c6a1f7b616e3@csgroup.eu> Message-ID: <58e781b6-b23d-9c22-4b2b-c82e708758bb@csgroup.eu> Date: Wed, 5 May 2021 06:49:05 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: <9b07e9c1-b004-a814-278b-c6a1f7b616e3@csgroup.eu> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le 04/05/2021 à 12:40, Christophe Leroy a écrit : > > > Le 04/05/2021 à 12:14, Nicholas Piggin a écrit : >> Excerpts from Christophe Leroy's message of May 4, 2021 2:46 am: >>> PACA_SIZE, PACACONTEXTID, PACALOWSLICESPSIZE, PACAHIGHSLICEPSIZE, >>> PACA_SLB_ADDR_LIMIT, MMUPSIZEDEFSIZE, PACASLBCACHE, PACASLBCACHEPTR, >>> PACASTABRR, PACAVMALLOCSLLP, MMUPSIZESLLP, PACACONTEXTSLLP, >>> PACALPPACAPTR, LPPACA_DTLIDX and PACA_DTL_RIDX are not used anymore >>> by ASM code. >> >> Reviewed-by: Nicholas Piggin >> >> Also I think SIGSEGV, NMI_MASK, THREAD_DBCR0, KUAP?, TI_FLAGS, >> TI_PREEMPT, [ID]CACHEL1*, STACK_REGS_KUAP, EXC_LVL_SIZE, KVM_NEED_FLUSH, >> KVM_FWNMI, VCPU_DEC, VCPU_SPMC, HSTATE_XICS_PHYS, HSTATE_SAVED_XIRR, >> PPC_DBELL_MSGTYPE I think. While we're cleaning it up. > > Yes, thanks for checking. > > I think we can safely remove KUAP. > > But we can't remove EXC_LVL_SIZE, it is used in kernel/head_booke.h which is probably included in > head_44x.S and head_fsl_booke.S DCACHEL1*BLOCKSIZE are also still used. Christophe > > Christophe