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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 132B3C33CA1 for ; Mon, 20 Jan 2020 17:08:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE4ED22464 for ; Mon, 20 Jan 2020 17:08:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="mcD/ZnPp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729159AbgATRI2 (ORCPT ); Mon, 20 Jan 2020 12:08:28 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:40130 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726642AbgATRI1 (ORCPT ); Mon, 20 Jan 2020 12:08:27 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 481dR74f1Jz9txwZ; Mon, 20 Jan 2020 18:08:19 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=mcD/ZnPp; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id PB6Od9Chvw6v; Mon, 20 Jan 2020 18:08:19 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 481dR73Lf3z9txwY; Mon, 20 Jan 2020 18:08:19 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1579540099; bh=yzfJ9FjkQyCVlK+cgsOTuMQ4XbfRfoKvMNM6nb5r3UI=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=mcD/ZnPpMb3Gvs1Fu8ShcsW/tjiI8vxX1spQWPagvARRgwMyLCX57drTZw4IIlWTT 7Eth0yTjCJCPdeskFUImvSrga71e/3E6dNmtljCIVLukdQbR9DnwBYxaBmMNs9f2yF MQDPuMtMbdR8t0a+nujkuIfoduw1FWTj9Hb24lhc= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id AEDC08B7D2; Mon, 20 Jan 2020 18:08:24 +0100 (CET) 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 nJxXjRrAsRPz; Mon, 20 Jan 2020 18:08:24 +0100 (CET) Received: from [192.168.4.90] (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 85F838B7CC; Mon, 20 Jan 2020 18:08:23 +0100 (CET) Subject: Re: [RFC PATCH v4 00/11] powerpc: switch VDSO to C implementation. To: Segher Boessenkool Cc: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , nathanl@linux.ibm.com, arnd@arndb.de, tglx@linutronix.de, vincenzo.frascino@arm.com, luto@kernel.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org References: <20200117085851.GS3191@gate.crashing.org> <3027b6d2-47a9-a871-7c52-050a5f9c6ab7@c-s.fr> <20200120151936.GB3191@gate.crashing.org> From: Christophe Leroy Message-ID: <4b0e5941-c37e-3c85-3809-45f33ce35657@c-s.fr> Date: Mon, 20 Jan 2020 18:08:23 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <20200120151936.GB3191@gate.crashing.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le 20/01/2020 à 16:19, Segher Boessenkool a écrit : > On Mon, Jan 20, 2020 at 02:56:00PM +0000, Christophe Leroy wrote: >>> Nice! Much better. >>> >>> It should be tested on more representative hardware, too, but this looks >>> promising alright :-) >> >> mpc832x (e300c2 core) at 333 MHz: >> >> Before: >> >> gettimeofday: vdso: 235 nsec/call >> clock-gettime-realtime: vdso: 244 nsec/call >> >> With the series: >> >> gettimeofday: vdso: 271 nsec/call >> clock-gettime-realtime: vdso: 281 nsec/call > > Those are important, and degrade ~15%. That is acceptable IMO, but do > you see a way to optimise this (later)? Not easy I think. First we have the unavoidable ASM entry function that can't be dropped because of the CR[SO] bit the set on error or clear on no error and that can't be done in C. In our ASM VDSO, fixed shifts are used, while in generic C VDSO, shifts are generic and read from the VDSO data. And there is still some funny code generated by GCC (8.1), like: 620: 7d 29 3c 30 srw r9,r9,r7 624: 21 87 00 20 subfic r12,r7,32 628: 7d 07 3c 31 srw. r7,r8,r7 62c: 7d 08 60 30 slw r8,r8,r12 630: 7d 0b 4b 78 or r11,r8,r9 634: 39 40 00 00 li r10,0 638: 40 82 00 84 bne 6bc <__c_kernel_clock_gettime+0x114> 63c: 81 23 00 24 lwz r9,36(r3) 640: 81 05 00 00 lwz r8,0(r5) ... 6bc: 7d 69 5b 78 mr r9,r11 6c0: 7c ea 3b 78 mr r10,r7 6c4: 7d 2b 4b 78 mr r11,r9 6c8: 4b ff ff 74 b 63c <__c_kernel_clock_gettime+0x94> This branch to 6bc is totally useless: - copying r11 into r9 is pointless as r9 is overwritten in 63c - copying back r9 into r11 is pointless as r11 has not been modified inbetween. - loading r10 with 0 then overwritting r10 with r7 when r7 is not 0 is pointless as well, could have directly put the result of srw. in r10. Christophe 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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 AEB8CC2D0DB for ; Mon, 20 Jan 2020 17:10:33 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1B80222314 for ; Mon, 20 Jan 2020 17:10:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="mcD/ZnPp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1B80222314 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 481dTf6bB5zDqgX for ; Tue, 21 Jan 2020 04:10:30 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=c-s.fr (client-ip=93.17.236.30; helo=pegase1.c-s.fr; envelope-from=christophe.leroy@c-s.fr; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=c-s.fr header.i=@c-s.fr header.a=rsa-sha256 header.s=mail header.b=mcD/ZnPp; dkim-atps=neutral Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 481dRL3N1MzDqfj for ; Tue, 21 Jan 2020 04:08:29 +1100 (AEDT) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 481dR74f1Jz9txwZ; Mon, 20 Jan 2020 18:08:19 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=mcD/ZnPp; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id PB6Od9Chvw6v; Mon, 20 Jan 2020 18:08:19 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 481dR73Lf3z9txwY; Mon, 20 Jan 2020 18:08:19 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1579540099; bh=yzfJ9FjkQyCVlK+cgsOTuMQ4XbfRfoKvMNM6nb5r3UI=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=mcD/ZnPpMb3Gvs1Fu8ShcsW/tjiI8vxX1spQWPagvARRgwMyLCX57drTZw4IIlWTT 7Eth0yTjCJCPdeskFUImvSrga71e/3E6dNmtljCIVLukdQbR9DnwBYxaBmMNs9f2yF MQDPuMtMbdR8t0a+nujkuIfoduw1FWTj9Hb24lhc= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id AEDC08B7D2; Mon, 20 Jan 2020 18:08:24 +0100 (CET) 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 nJxXjRrAsRPz; Mon, 20 Jan 2020 18:08:24 +0100 (CET) Received: from [192.168.4.90] (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 85F838B7CC; Mon, 20 Jan 2020 18:08:23 +0100 (CET) Subject: Re: [RFC PATCH v4 00/11] powerpc: switch VDSO to C implementation. To: Segher Boessenkool References: <20200117085851.GS3191@gate.crashing.org> <3027b6d2-47a9-a871-7c52-050a5f9c6ab7@c-s.fr> <20200120151936.GB3191@gate.crashing.org> From: Christophe Leroy Message-ID: <4b0e5941-c37e-3c85-3809-45f33ce35657@c-s.fr> Date: Mon, 20 Jan 2020 18:08:23 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <20200120151936.GB3191@gate.crashing.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: fr Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: nathanl@linux.ibm.com, arnd@arndb.de, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Paul Mackerras , luto@kernel.org, tglx@linutronix.de, vincenzo.frascino@arm.com, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Le 20/01/2020 à 16:19, Segher Boessenkool a écrit : > On Mon, Jan 20, 2020 at 02:56:00PM +0000, Christophe Leroy wrote: >>> Nice! Much better. >>> >>> It should be tested on more representative hardware, too, but this looks >>> promising alright :-) >> >> mpc832x (e300c2 core) at 333 MHz: >> >> Before: >> >> gettimeofday: vdso: 235 nsec/call >> clock-gettime-realtime: vdso: 244 nsec/call >> >> With the series: >> >> gettimeofday: vdso: 271 nsec/call >> clock-gettime-realtime: vdso: 281 nsec/call > > Those are important, and degrade ~15%. That is acceptable IMO, but do > you see a way to optimise this (later)? Not easy I think. First we have the unavoidable ASM entry function that can't be dropped because of the CR[SO] bit the set on error or clear on no error and that can't be done in C. In our ASM VDSO, fixed shifts are used, while in generic C VDSO, shifts are generic and read from the VDSO data. And there is still some funny code generated by GCC (8.1), like: 620: 7d 29 3c 30 srw r9,r9,r7 624: 21 87 00 20 subfic r12,r7,32 628: 7d 07 3c 31 srw. r7,r8,r7 62c: 7d 08 60 30 slw r8,r8,r12 630: 7d 0b 4b 78 or r11,r8,r9 634: 39 40 00 00 li r10,0 638: 40 82 00 84 bne 6bc <__c_kernel_clock_gettime+0x114> 63c: 81 23 00 24 lwz r9,36(r3) 640: 81 05 00 00 lwz r8,0(r5) ... 6bc: 7d 69 5b 78 mr r9,r11 6c0: 7c ea 3b 78 mr r10,r7 6c4: 7d 2b 4b 78 mr r11,r9 6c8: 4b ff ff 74 b 63c <__c_kernel_clock_gettime+0x94> This branch to 6bc is totally useless: - copying r11 into r9 is pointless as r9 is overwritten in 63c - copying back r9 into r11 is pointless as r11 has not been modified inbetween. - loading r10 with 0 then overwritting r10 with r7 when r7 is not 0 is pointless as well, could have directly put the result of srw. in r10. Christophe 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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 77E48C2D0DB for ; Mon, 20 Jan 2020 17:08:44 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 49BD822314 for ; Mon, 20 Jan 2020 17:08:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="HZJdl64m"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="mcD/ZnPp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 49BD822314 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Y/kX8MDm6BF70feDbD5UToQLUcl4yj8tIRljUtt5g9I=; b=HZJdl64mzCeAjCZUCqzDoaAAI naVp5x1t1N0arSJSHVuMcao6iLKv4dVQoLeA880Bf+HtXxGXM1Wy+4A4k4gAIm8zpeEOlILnfHNd0 Dx5zqrddU7Yf9Khu7lTDTB4KinZZRuJD1TXdk0F+kxARH3kHBUZBhdOrgNCNWI7FVnW5GHJCOAlW5 AwR+C/gNJ5uhmorsWqTrleEKtyd/ifYwKn7DXQHxph9Xh7TSCy6rHHV9wgOXfFwiceb7ANtzi0ln/ 56bINp5cmRZt38X80mnBPajk4OrJIcMC8QSSlJWPP51HBfD26OvQytRtjNklmfCHj9laaXrrgu/pW hsBjMnlKw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1itaXV-0000r6-90; Mon, 20 Jan 2020 17:08:37 +0000 Received: from pegase1.c-s.fr ([93.17.236.30]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1itaXO-0000mK-Fa for linux-arm-kernel@lists.infradead.org; Mon, 20 Jan 2020 17:08:34 +0000 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 481dR74f1Jz9txwZ; Mon, 20 Jan 2020 18:08:19 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=mcD/ZnPp; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id PB6Od9Chvw6v; Mon, 20 Jan 2020 18:08:19 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 481dR73Lf3z9txwY; Mon, 20 Jan 2020 18:08:19 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1579540099; bh=yzfJ9FjkQyCVlK+cgsOTuMQ4XbfRfoKvMNM6nb5r3UI=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=mcD/ZnPpMb3Gvs1Fu8ShcsW/tjiI8vxX1spQWPagvARRgwMyLCX57drTZw4IIlWTT 7Eth0yTjCJCPdeskFUImvSrga71e/3E6dNmtljCIVLukdQbR9DnwBYxaBmMNs9f2yF MQDPuMtMbdR8t0a+nujkuIfoduw1FWTj9Hb24lhc= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id AEDC08B7D2; Mon, 20 Jan 2020 18:08:24 +0100 (CET) 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 nJxXjRrAsRPz; Mon, 20 Jan 2020 18:08:24 +0100 (CET) Received: from [192.168.4.90] (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 85F838B7CC; Mon, 20 Jan 2020 18:08:23 +0100 (CET) Subject: Re: [RFC PATCH v4 00/11] powerpc: switch VDSO to C implementation. To: Segher Boessenkool References: <20200117085851.GS3191@gate.crashing.org> <3027b6d2-47a9-a871-7c52-050a5f9c6ab7@c-s.fr> <20200120151936.GB3191@gate.crashing.org> From: Christophe Leroy Message-ID: <4b0e5941-c37e-3c85-3809-45f33ce35657@c-s.fr> Date: Mon, 20 Jan 2020 18:08:23 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <20200120151936.GB3191@gate.crashing.org> Content-Language: fr X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200120_090830_824323_6E129F4C X-CRM114-Status: GOOD ( 10.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: nathanl@linux.ibm.com, arnd@arndb.de, Benjamin Herrenschmidt , x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Paul Mackerras , luto@kernel.org, Michael Ellerman , tglx@linutronix.de, vincenzo.frascino@arm.com, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org CgpMZSAyMC8wMS8yMDIwIMOgIDE2OjE5LCBTZWdoZXIgQm9lc3Nlbmtvb2wgYSDDqWNyaXTCoDoK PiBPbiBNb24sIEphbiAyMCwgMjAyMCBhdCAwMjo1NjowMFBNICswMDAwLCBDaHJpc3RvcGhlIExl cm95IHdyb3RlOgo+Pj4gTmljZSEgIE11Y2ggYmV0dGVyLgo+Pj4KPj4+IEl0IHNob3VsZCBiZSB0 ZXN0ZWQgb24gbW9yZSByZXByZXNlbnRhdGl2ZSBoYXJkd2FyZSwgdG9vLCBidXQgdGhpcyBsb29r cwo+Pj4gcHJvbWlzaW5nIGFscmlnaHQgOi0pCj4+Cj4+IG1wYzgzMnggKGUzMDBjMiBjb3JlKSBh dCAzMzMgTUh6Ogo+Pgo+PiBCZWZvcmU6Cj4+Cj4+IGdldHRpbWVvZmRheTogICAgdmRzbzogMjM1 IG5zZWMvY2FsbAo+PiBjbG9jay1nZXR0aW1lLXJlYWx0aW1lOiAgICB2ZHNvOiAyNDQgbnNlYy9j YWxsCj4+Cj4+IFdpdGggdGhlIHNlcmllczoKPj4KPj4gZ2V0dGltZW9mZGF5OiAgICB2ZHNvOiAy NzEgbnNlYy9jYWxsCj4+IGNsb2NrLWdldHRpbWUtcmVhbHRpbWU6ICAgIHZkc286IDI4MSBuc2Vj L2NhbGwKPiAKPiBUaG9zZSBhcmUgaW1wb3J0YW50LCBhbmQgZGVncmFkZSB+MTUlLiAgVGhhdCBp cyBhY2NlcHRhYmxlIElNTywgYnV0IGRvCj4geW91IHNlZSBhIHdheSB0byBvcHRpbWlzZSB0aGlz IChsYXRlcik/CgpOb3QgZWFzeSBJIHRoaW5rLgoKRmlyc3Qgd2UgaGF2ZSB0aGUgdW5hdm9pZGFi bGUgQVNNIGVudHJ5IGZ1bmN0aW9uIHRoYXQgY2FuJ3QgYmUgZHJvcHBlZCAKYmVjYXVzZSBvZiB0 aGUgQ1JbU09dIGJpdCB0aGUgc2V0IG9uIGVycm9yIG9yIGNsZWFyIG9uIG5vIGVycm9yIGFuZCB0 aGF0IApjYW4ndCBiZSBkb25lIGluIEMuCgpJbiBvdXIgQVNNIFZEU08sIGZpeGVkIHNoaWZ0cyBh cmUgdXNlZCwgd2hpbGUgaW4gZ2VuZXJpYyBDIFZEU08sIHNoaWZ0cyAKYXJlIGdlbmVyaWMgYW5k IHJlYWQgZnJvbSB0aGUgVkRTTyBkYXRhLgoKQW5kIHRoZXJlIGlzIHN0aWxsIHNvbWUgZnVubnkg Y29kZSBnZW5lcmF0ZWQgYnkgR0NDICg4LjEpLCBsaWtlOgoKICA2MjA6CTdkIDI5IDNjIDMwIAlz cncgICAgIHI5LHI5LHI3CiAgNjI0OgkyMSA4NyAwMCAyMCAJc3ViZmljICByMTIscjcsMzIKICA2 Mjg6CTdkIDA3IDNjIDMxIAlzcncuICAgIHI3LHI4LHI3CiAgNjJjOgk3ZCAwOCA2MCAzMCAJc2x3 ICAgICByOCxyOCxyMTIKICA2MzA6CTdkIDBiIDRiIDc4IAlvciAgICAgIHIxMSxyOCxyOQogIDYz NDoJMzkgNDAgMDAgMDAgCWxpICAgICAgcjEwLDAKICA2Mzg6CTQwIDgyIDAwIDg0IAlibmUgICAg IDZiYyA8X19jX2tlcm5lbF9jbG9ja19nZXR0aW1lKzB4MTE0PgogIDYzYzoJODEgMjMgMDAgMjQg CWx3eiAgICAgcjksMzYocjMpCiAgNjQwOgk4MSAwNSAwMCAwMCAJbHd6ICAgICByOCwwKHI1KQou Li4KICA2YmM6CTdkIDY5IDViIDc4IAltciAgICAgIHI5LHIxMQogIDZjMDoJN2MgZWEgM2IgNzgg CW1yICAgICAgcjEwLHI3CiAgNmM0Ogk3ZCAyYiA0YiA3OCAJbXIgICAgICByMTEscjkKICA2Yzg6 CTRiIGZmIGZmIDc0IAliICAgICAgIDYzYyA8X19jX2tlcm5lbF9jbG9ja19nZXR0aW1lKzB4OTQ+ CgpUaGlzIGJyYW5jaCB0byA2YmMgaXMgdG90YWxseSB1c2VsZXNzOgotIGNvcHlpbmcgcjExIGlu dG8gcjkgaXMgcG9pbnRsZXNzIGFzIHI5IGlzIG92ZXJ3cml0dGVuIGluIDYzYwotIGNvcHlpbmcg YmFjayByOSBpbnRvIHIxMSBpcyBwb2ludGxlc3MgYXMgcjExIGhhcyBub3QgYmVlbiBtb2RpZmll ZCAKaW5iZXR3ZWVuLgotIGxvYWRpbmcgcjEwIHdpdGggMCB0aGVuIG92ZXJ3cml0dGluZyByMTAg d2l0aCByNyB3aGVuIHI3IGlzIG5vdCAwIGlzIApwb2ludGxlc3MgYXMgd2VsbCwgY291bGQgaGF2 ZSBkaXJlY3RseSBwdXQgdGhlIHJlc3VsdCBvZiBzcncuIGluIHIxMC4KCkNocmlzdG9waGUKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1r ZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpo dHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJu ZWwK