From patchwork Sun Sep 27 09:16:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 1371990 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4BzgDQ5bMLz9s1t for ; Sun, 27 Sep 2020 19:23:02 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=csgroup.eu Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4BzgDQ3DF9zDqR0 for ; Sun, 27 Sep 2020 19:23:02 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org 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 4Bzg4p6rvNzDqPv for ; Sun, 27 Sep 2020 19:16:23 +1000 (AEST) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4Bzg4Y1mbTz9vCxx; Sun, 27 Sep 2020 11:16:13 +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 U2cG5DDVaODT; Sun, 27 Sep 2020 11:16:13 +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 4Bzg4Y10LJz9vCxw; Sun, 27 Sep 2020 11:16:13 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id A1D118B771; Sun, 27 Sep 2020 11:16:17 +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 aMYHOO3LHzx1; Sun, 27 Sep 2020 11:16:17 +0200 (CEST) Received: from po17688vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 4F3DE8B75B; Sun, 27 Sep 2020 11:16:17 +0200 (CEST) Received: by po17688vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 1D5FA65DE8; Sun, 27 Sep 2020 09:16:16 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [PATCH v1 00/30] Modernise VDSO setup To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Date: Sun, 27 Sep 2020 09:16:16 +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: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This series modernises the setup of VDSO: - Switch to using _install_special_mapping() which has replaced install_special_mapping() - Move datapage in front of text like most other architectures to simplify its localisation - Perform link time symbol resolution instead of runtime This leads to a huge size reduction of vdso.c Replaces the two following series: [v1,1/9] powerpc/vdso: Remove BUG_ON() in vdso_init() [v2,1/5] powerpc/vdso: Remove DBG() This series is based on top of the series to the C generic VDSO. It is functionnaly independant but some trivial merge conflict occurs in some files. I may rebase it on top of merge if the C generic VDSO series cannot be merged soon. Christophe Leroy (30): powerpc/vdso: Stripped VDSO is not needed, don't build it powerpc/vdso: Add missing includes and clean vdso_setup_syscall_map() powerpc/vdso: Rename syscall_map_32/64 to simplify vdso_setup_syscall_map() powerpc/vdso: Remove get_page() in vdso_pagelist initialization powerpc/vdso: Remove NULL termination element in vdso_pagelist powerpc/vdso: Refactor 32 bits and 64 bits pages setup powerpc/vdso: Remove unnecessary ifdefs in vdso_pagelist initialization powerpc/vdso: Use VDSO size in arch_setup_additional_pages() powerpc/vdso: Simplify arch_setup_additional_pages() exit powerpc/vdso: Move to _install_special_mapping() and remove arch_vma_name() powerpc/vdso: Provide vdso_remap() powerpc/vdso: Replace vdso_base by vdso powerpc/vdso: Move vdso datapage up front powerpc/vdso: Simplify __get_datapage() powerpc/vdso: Remove unused \tmp param in __get_datapage() powerpc/vdso: Retrieve sigtramp offsets at buildtime powerpc/vdso: Use builtin symbols to locate fixup section powerpc/vdso: Merge __kernel_sync_dicache_p5() into __kernel_sync_dicache() powerpc/vdso: Remove vdso32_pages and vdso64_pages powerpc/vdso: Remove __kernel_datapage_offset powerpc/vdso: Remove runtime generated sigtramp offsets powerpc/vdso: Remove vdso_patches[] and associated functions powerpc/vdso: Remove unused text member in struct lib32/64_elfinfo powerpc/vdso: Remove symbol section information in struct lib32/64_elfinfo powerpc/vdso: Remove lib32_elfinfo and lib64_elfinfo powerpc/vdso: Remove vdso_setup() powerpc/vdso: Remove vdso_ready powerpc/vdso: Remove DBG() powerpc/vdso: Remove VDSO32_LBASE and VDSO64_LBASE powerpc/vdso: Cleanup vdso.h arch/powerpc/Makefile | 24 +- arch/powerpc/include/asm/book3s/32/mmu-hash.h | 2 +- arch/powerpc/include/asm/book3s/64/mmu.h | 2 +- arch/powerpc/include/asm/elf.h | 2 +- arch/powerpc/include/asm/mm-arch-hooks.h | 25 - arch/powerpc/include/asm/mmu_context.h | 6 +- arch/powerpc/include/asm/nohash/32/mmu-40x.h | 2 +- arch/powerpc/include/asm/nohash/32/mmu-44x.h | 2 +- arch/powerpc/include/asm/nohash/32/mmu-8xx.h | 2 +- arch/powerpc/include/asm/nohash/mmu-book3e.h | 2 +- arch/powerpc/include/asm/vdso.h | 29 +- arch/powerpc/include/asm/vdso/gettimeofday.h | 4 +- arch/powerpc/include/asm/vdso_datapage.h | 17 +- arch/powerpc/kernel/asm-offsets.c | 6 +- arch/powerpc/kernel/signal_32.c | 8 +- arch/powerpc/kernel/signal_64.c | 4 +- arch/powerpc/kernel/vdso.c | 682 +++--------------- arch/powerpc/kernel/vdso32/Makefile | 27 +- arch/powerpc/kernel/vdso32/cacheflush.S | 19 +- arch/powerpc/kernel/vdso32/datapage.S | 7 +- .../powerpc/kernel/vdso32/gen_vdso_offsets.sh | 16 + arch/powerpc/kernel/vdso32/vdso32.lds.S | 24 +- arch/powerpc/kernel/vdso64/Makefile | 25 +- arch/powerpc/kernel/vdso64/cacheflush.S | 18 +- arch/powerpc/kernel/vdso64/datapage.S | 7 +- .../powerpc/kernel/vdso64/gen_vdso_offsets.sh | 16 + arch/powerpc/kernel/vdso64/vdso64.lds.S | 23 +- arch/powerpc/perf/callchain_32.c | 8 +- arch/powerpc/perf/callchain_64.c | 4 +- 29 files changed, 267 insertions(+), 746 deletions(-) delete mode 100644 arch/powerpc/include/asm/mm-arch-hooks.h create mode 100755 arch/powerpc/kernel/vdso32/gen_vdso_offsets.sh create mode 100755 arch/powerpc/kernel/vdso64/gen_vdso_offsets.sh