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=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 B3B08C169C4 for ; Fri, 8 Feb 2019 12:59:28 +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 2CDF320844 for ; Fri, 8 Feb 2019 12:59:28 +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="aYMfm72z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2CDF320844 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 43wwHf1Cy1zDqXT for ; Fri, 8 Feb 2019 23:59:26 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) 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.b="aYMfm72z"; 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 43ww7X0bx1zDqWv for ; Fri, 8 Feb 2019 23:52:22 +1100 (AEDT) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 43ww7N226tz9v0dH; Fri, 8 Feb 2019 13:52:16 +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=aYMfm72z; 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 RPH8uguzozuR; Fri, 8 Feb 2019 13:52:16 +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 43ww7N0yfsz9v9DY; Fri, 8 Feb 2019 13:52:16 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1549630336; bh=S1kn21Xe7/docipPWcnKOsqhSa/YEFzLSyBpdTR2gLE=; h=From:Subject:To:Cc:Date:From; b=aYMfm72zUAsT4J2PvmbcJeFnvPe9AYVbn5/Mo2Ng6gJYvCN3f/E5hkCgseZk33qgl d4FjRrm5iN0IbFkNoS9xcRy8uD1BMcyQZkBb4tVOge2qgfZBLeRGQj6NvHT0UVG37d 7bOsdzWvEQC+v0Q39WsrCT6QyUCvAoeCs+5Vttfc= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 678D88B756; Fri, 8 Feb 2019 13:52:17 +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 CUIsjZfggXVe; Fri, 8 Feb 2019 13:52:17 +0100 (CET) Received: from po16846vm.idsi0.si.c-s.fr (po15451.idsi0.si.c-s.fr [172.25.231.2]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 394F58B8D9; Fri, 8 Feb 2019 13:52:17 +0100 (CET) Received: by po16846vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 11415653E8; Fri, 8 Feb 2019 12:52:16 +0000 (UTC) Message-Id: From: Christophe Leroy Subject: [RFC PATCH v1 00/16] powerpc/32: Implement fast syscall entry To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Nicholas Piggin Date: Fri, 8 Feb 2019 12:52:16 +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+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" The purpose of this series is to implement a fast syscall entry on ppc32. Unlike all other exceptions which can happen at any time and require to preserve all registers, the syscalls do not require the preservation of volatile registers (except LR). Syscall entries can then be optimised with lighter entry code than the general exception handling. In the meantime this series refactorises the exception entry on 40x/6xx/8xx as they are pretty similar, and it takes benh series on rationalise the settings of MSR_EE at exceptions/syscall entries as this change pretty simplies exception entries. On a 8xx, this series improves null_syscall selftest by 17% On a 83xx, this series improves null_syscall selftest by 12,5% Christophe Leroy (16): powerpc: CONFIG_THREAD_INFO_IN_TASK series powerpc/32: Refactor EXCEPTION entry macros for head_8xx.S and head_32.S powerpc/32: move LOAD_MSR_KERNEL() into head_32.h and use it powerpc/32: make the 6xx/8xx EXC_XFER_TEMPLATE() similar to the 40x/booke one powerpc/40x: Don't use SPRN_SPRG_SCRATCH2 in EXCEPTION_PROLOG powerpc/40x: add exception frame marker powerpc/40x: Split and rename NORMAL_EXCEPTION_PROLOG powerpc/40x: Refactor exception entry macros by using head_32.h powerpc/fsl_booke: ensure SPEFloatingPointException() reenables interrupts powerpc/32: enter syscall with MSR_EE inconditionaly set powerpc/32: Enter exceptions with MSR_EE unset powerpc/32: get rid of COPY_EE in exception entry powerpc: Fix 32-bit handling of MSR_EE on exceptions powerpc/32: implement fast entry for syscalls on non BOOKE powerpc/32: Remove MSR_PR test when returning from syscall powerpc/32: don't do syscall stuff in transfer_to_handler on non BOOKE arch/powerpc/Kconfig | 1 + arch/powerpc/Makefile | 7 + arch/powerpc/include/asm/asm-prototypes.h | 4 +- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 +- arch/powerpc/include/asm/exception-64s.h | 4 +- arch/powerpc/include/asm/irq.h | 18 +- arch/powerpc/include/asm/livepatch.h | 7 +- arch/powerpc/include/asm/processor.h | 105 +--------- arch/powerpc/include/asm/ptrace.h | 2 +- arch/powerpc/include/asm/reg.h | 2 +- arch/powerpc/include/asm/smp.h | 17 +- arch/powerpc/include/asm/task_size_32.h | 21 ++ arch/powerpc/include/asm/task_size_64.h | 79 ++++++++ arch/powerpc/include/asm/thread_info.h | 19 -- arch/powerpc/kernel/asm-offsets.c | 12 +- arch/powerpc/kernel/entry_32.S | 261 ++++++++++++++----------- arch/powerpc/kernel/entry_64.S | 12 +- arch/powerpc/kernel/epapr_hcalls.S | 5 +- arch/powerpc/kernel/exceptions-64e.S | 13 +- arch/powerpc/kernel/exceptions-64s.S | 2 +- arch/powerpc/kernel/head_32.S | 182 ++++------------- arch/powerpc/kernel/head_32.h | 203 +++++++++++++++++++ arch/powerpc/kernel/head_40x.S | 154 ++++----------- arch/powerpc/kernel/head_44x.S | 16 +- arch/powerpc/kernel/head_64.S | 1 + arch/powerpc/kernel/head_8xx.S | 133 ++----------- arch/powerpc/kernel/head_booke.h | 44 ++--- arch/powerpc/kernel/head_fsl_booke.S | 44 ++--- arch/powerpc/kernel/idle_6xx.S | 8 +- arch/powerpc/kernel/idle_book3e.S | 2 +- arch/powerpc/kernel/idle_e500.S | 8 +- arch/powerpc/kernel/idle_power4.S | 2 +- arch/powerpc/kernel/irq.c | 114 ++--------- arch/powerpc/kernel/kgdb.c | 28 --- arch/powerpc/kernel/machine_kexec_64.c | 6 +- arch/powerpc/kernel/misc_32.S | 17 +- arch/powerpc/kernel/process.c | 63 +++--- arch/powerpc/kernel/setup-common.c | 2 +- arch/powerpc/kernel/setup_32.c | 26 ++- arch/powerpc/kernel/setup_64.c | 51 +---- arch/powerpc/kernel/smp.c | 16 +- arch/powerpc/kernel/stacktrace.c | 29 ++- arch/powerpc/kernel/trace/ftrace_64_mprofile.S | 6 +- arch/powerpc/kernel/traps.c | 8 + arch/powerpc/kvm/book3s_hv_hmi.c | 1 + arch/powerpc/mm/hash_low_32.S | 14 +- arch/powerpc/net/bpf_jit32.h | 5 +- arch/powerpc/sysdev/6xx-suspend.S | 5 +- arch/powerpc/xmon/xmon.c | 2 +- 49 files changed, 816 insertions(+), 967 deletions(-) create mode 100644 arch/powerpc/include/asm/task_size_32.h create mode 100644 arch/powerpc/include/asm/task_size_64.h create mode 100644 arch/powerpc/kernel/head_32.h -- 2.13.3