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=-3.8 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 31959C55178 for ; Tue, 3 Nov 2020 18:07:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF5B120757 for ; Tue, 3 Nov 2020 18:07:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728993AbgKCSHP (ORCPT ); Tue, 3 Nov 2020 13:07:15 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:37467 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727688AbgKCSHP (ORCPT ); Tue, 3 Nov 2020 13:07:15 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4CQd661jCcz9v1YX; Tue, 3 Nov 2020 19:07:10 +0100 (CET) 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 aQCFbUAmQvZd; Tue, 3 Nov 2020 19:07:10 +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 4CQd660d6Vz9v1YS; Tue, 3 Nov 2020 19:07:10 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id DDE858B7DB; Tue, 3 Nov 2020 19:07:11 +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 ni7TN5eVC9O6; Tue, 3 Nov 2020 19:07:11 +0100 (CET) Received: from po17688vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 74E208B7D4; Tue, 3 Nov 2020 19:07:11 +0100 (CET) Received: by po17688vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 3405366860; Tue, 3 Nov 2020 18:07:11 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [PATCH v13 0/8] powerpc: switch VDSO to C implementation 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 Date: Tue, 3 Nov 2020 18:07:11 +0000 (UTC) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a series to switch powerpc VDSO to generic C implementation. Changes in v13: - Reorganised headers to avoid the need for a fake 32 bits config for building VDSO32 on PPC64 - Rebased after the removal of powerpc 601 - Using DOTSYM() macro to call functions directly without using OPD - Explicitely dropped .opd and .got1 sections which are now unused Changes in v12: - Rebased to today's powerpc/merge branch (Conflicts on VDSO Makefiles) - Added missing prototype for __kernel_clock_gettime64() Changes in v11: - Rebased to today's powerpc/merge branch - Prototype of __arch_get_hw_counter() was modified in mainline (patch 2) Changes in v10 are: - Added a comment explaining the reason for the double stack frame - Moved back .cfi_register lr next to mflr Main changes in 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 (8): powerpc/feature: Fix CPU_FTRS_ALWAYS by removing CPU_FTRS_GENERIC_32 powerpc/feature: Use CONFIG_PPC64 instead of __powerpc64__ to define possible features powerpc/processor: Move cpu_relax() into asm/vdso/processor.h powerpc/time: Move timebase functions into new asm/timebase.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/cputable.h | 9 +- arch/powerpc/include/asm/ppc_asm.h | 2 + arch/powerpc/include/asm/processor.h | 13 +- arch/powerpc/include/asm/time.h | 30 +- arch/powerpc/include/asm/timebase.h | 42 +++ arch/powerpc/include/asm/vdso/clocksource.h | 7 + arch/powerpc/include/asm/vdso/gettimeofday.h | 201 +++++++++++++ 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 | 26 +- arch/powerpc/kernel/vdso32/gettimeofday.S | 300 +------------------ arch/powerpc/kernel/vdso32/vdso32.lds.S | 2 + arch/powerpc/kernel/vdso32/vgettimeofday.c | 34 +++ arch/powerpc/kernel/vdso64/Makefile | 23 +- arch/powerpc/kernel/vdso64/gettimeofday.S | 242 +-------------- arch/powerpc/kernel/vdso64/vdso64.lds.S | 2 +- arch/powerpc/kernel/vdso64/vgettimeofday.c | 29 ++ 23 files changed, 466 insertions(+), 738 deletions(-) create mode 100644 arch/powerpc/include/asm/clocksource.h create mode 100644 arch/powerpc/include/asm/timebase.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/vgettimeofday.c create mode 100644 arch/powerpc/kernel/vdso64/vgettimeofday.c -- 2.25.0