From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christophe Leroy Subject: [PATCH v10 0/5] powerpc: switch VDSO to C implementation Date: Wed, 5 Aug 2020 07:09:21 +0000 (UTC) Message-ID: Return-path: Received: from pegase1.c-s.fr ([93.17.236.30]:32714 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725983AbgHEHJZ (ORCPT ); Wed, 5 Aug 2020 03:09:25 -0400 Sender: linux-arch-owner@vger.kernel.org List-ID: To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , nathanl@linux.ibm.com, anton@ozlabs.org Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, arnd@arndb.de, tglx@linutronix.de, vincenzo.frascino@arm.com, luto@kernel.org, linux-arch@vger.kernel.org This is the tenth version of a series to switch powerpc VDSO to generic C implementation. Changes since v10 are: - Added a comment explaining the reason for the double stack frame - Moved back .cfi_register lr next to mflr Main changes since v9 are: - Dropped the patches which put the VDSO datapage in front of VDSO text in the mapping - Adds a second stack frame because the caller doesn't set one, at least on PPC64 - Saving the TOC pointer on PPC64 (is that really needed ?) This series applies on today's powerpc/merge branch. See the last patches for details on changes and performance. Christophe Leroy (5): powerpc/processor: Move cpu_relax() into asm/vdso/processor.h powerpc/vdso: Prepare for switching VDSO to generic C implementation. powerpc/vdso: Save and restore TOC pointer on PPC64 powerpc/vdso: Switch VDSO to generic C implementation. powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32 arch/powerpc/Kconfig | 2 + arch/powerpc/include/asm/clocksource.h | 7 + arch/powerpc/include/asm/processor.h | 13 +- arch/powerpc/include/asm/vdso/clocksource.h | 7 + arch/powerpc/include/asm/vdso/gettimeofday.h | 197 ++++++++++++ arch/powerpc/include/asm/vdso/processor.h | 23 ++ arch/powerpc/include/asm/vdso/vsyscall.h | 25 ++ arch/powerpc/include/asm/vdso_datapage.h | 40 +-- arch/powerpc/kernel/asm-offsets.c | 49 +-- arch/powerpc/kernel/time.c | 91 +----- arch/powerpc/kernel/vdso.c | 5 +- arch/powerpc/kernel/vdso32/Makefile | 32 +- arch/powerpc/kernel/vdso32/config-fake32.h | 34 +++ arch/powerpc/kernel/vdso32/gettimeofday.S | 300 +------------------ arch/powerpc/kernel/vdso32/vdso32.lds.S | 1 + arch/powerpc/kernel/vdso32/vgettimeofday.c | 35 +++ arch/powerpc/kernel/vdso64/Makefile | 23 +- arch/powerpc/kernel/vdso64/gettimeofday.S | 242 +-------------- arch/powerpc/kernel/vdso64/vgettimeofday.c | 29 ++ 19 files changed, 453 insertions(+), 702 deletions(-) create mode 100644 arch/powerpc/include/asm/clocksource.h create mode 100644 arch/powerpc/include/asm/vdso/clocksource.h create mode 100644 arch/powerpc/include/asm/vdso/gettimeofday.h create mode 100644 arch/powerpc/include/asm/vdso/processor.h create mode 100644 arch/powerpc/include/asm/vdso/vsyscall.h create mode 100644 arch/powerpc/kernel/vdso32/config-fake32.h create mode 100644 arch/powerpc/kernel/vdso32/vgettimeofday.c create mode 100644 arch/powerpc/kernel/vdso64/vgettimeofday.c -- 2.25.0 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=-4.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 AC429C433DF for ; Wed, 5 Aug 2020 07:13:35 +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 119EA22B40 for ; Wed, 5 Aug 2020 07:13:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 119EA22B40 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=csgroup.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4BM2sS3XGXzDqcK for ; Wed, 5 Aug 2020 17:13:32 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=csgroup.eu (client-ip=93.17.236.30; helo=pegase1.c-s.fr; envelope-from=christophe.leroy@csgroup.eu; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=csgroup.eu 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 4BM2mn6YghzDqQh for ; Wed, 5 Aug 2020 17:09:26 +1000 (AEST) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4BM2mc4lzhz9vD3k; Wed, 5 Aug 2020 09:09:20 +0200 (CEST) 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 bR_5TkxUgsNW; Wed, 5 Aug 2020 09:09:20 +0200 (CEST) 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 4BM2mc3qdrz9vD3j; Wed, 5 Aug 2020 09:09:20 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id C5C5A8B7DF; Wed, 5 Aug 2020 09:09:21 +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 XwEPbxMuJEZL; Wed, 5 Aug 2020 09:09:21 +0200 (CEST) Received: from po16052vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 889148B75F; Wed, 5 Aug 2020 09:09:21 +0200 (CEST) Received: by po16052vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 5186465BBD; Wed, 5 Aug 2020 07:09:21 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [PATCH v10 0/5] powerpc: switch VDSO to C implementation To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , nathanl@linux.ibm.com, anton@ozlabs.org Date: Wed, 5 Aug 2020 07:09:21 +0000 (UTC) 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: linux-arch@vger.kernel.org, arnd@arndb.de, linux-kernel@vger.kernel.org, luto@kernel.org, tglx@linutronix.de, vincenzo.frascino@arm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This is the tenth version of a series to switch powerpc VDSO to generic C implementation. Changes since v10 are: - Added a comment explaining the reason for the double stack frame - Moved back .cfi_register lr next to mflr Main changes since v9 are: - Dropped the patches which put the VDSO datapage in front of VDSO text in the mapping - Adds a second stack frame because the caller doesn't set one, at least on PPC64 - Saving the TOC pointer on PPC64 (is that really needed ?) This series applies on today's powerpc/merge branch. See the last patches for details on changes and performance. Christophe Leroy (5): powerpc/processor: Move cpu_relax() into asm/vdso/processor.h powerpc/vdso: Prepare for switching VDSO to generic C implementation. powerpc/vdso: Save and restore TOC pointer on PPC64 powerpc/vdso: Switch VDSO to generic C implementation. powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32 arch/powerpc/Kconfig | 2 + arch/powerpc/include/asm/clocksource.h | 7 + arch/powerpc/include/asm/processor.h | 13 +- arch/powerpc/include/asm/vdso/clocksource.h | 7 + arch/powerpc/include/asm/vdso/gettimeofday.h | 197 ++++++++++++ arch/powerpc/include/asm/vdso/processor.h | 23 ++ arch/powerpc/include/asm/vdso/vsyscall.h | 25 ++ arch/powerpc/include/asm/vdso_datapage.h | 40 +-- arch/powerpc/kernel/asm-offsets.c | 49 +-- arch/powerpc/kernel/time.c | 91 +----- arch/powerpc/kernel/vdso.c | 5 +- arch/powerpc/kernel/vdso32/Makefile | 32 +- arch/powerpc/kernel/vdso32/config-fake32.h | 34 +++ arch/powerpc/kernel/vdso32/gettimeofday.S | 300 +------------------ arch/powerpc/kernel/vdso32/vdso32.lds.S | 1 + arch/powerpc/kernel/vdso32/vgettimeofday.c | 35 +++ arch/powerpc/kernel/vdso64/Makefile | 23 +- arch/powerpc/kernel/vdso64/gettimeofday.S | 242 +-------------- arch/powerpc/kernel/vdso64/vgettimeofday.c | 29 ++ 19 files changed, 453 insertions(+), 702 deletions(-) create mode 100644 arch/powerpc/include/asm/clocksource.h create mode 100644 arch/powerpc/include/asm/vdso/clocksource.h create mode 100644 arch/powerpc/include/asm/vdso/gettimeofday.h create mode 100644 arch/powerpc/include/asm/vdso/processor.h create mode 100644 arch/powerpc/include/asm/vdso/vsyscall.h create mode 100644 arch/powerpc/kernel/vdso32/config-fake32.h create mode 100644 arch/powerpc/kernel/vdso32/vgettimeofday.c create mode 100644 arch/powerpc/kernel/vdso64/vgettimeofday.c -- 2.25.0