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=-11.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 AA455C433E6 for ; Mon, 8 Mar 2021 12:29:00 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 B5796651D1 for ; Mon, 8 Mar 2021 12:28:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B5796651D1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lists.linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 4585F606F4; Mon, 8 Mar 2021 12:28:59 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YB93WuHZb6eg; Mon, 8 Mar 2021 12:28:58 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTP id EB67B60672; Mon, 8 Mar 2021 12:28:57 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id C150CC0013; Mon, 8 Mar 2021 12:28:57 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 3CCE2C000B for ; Mon, 8 Mar 2021 12:28:55 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 8524C605D9 for ; Mon, 8 Mar 2021 12:28:54 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZDvfHdwOHamr for ; Mon, 8 Mar 2021 12:28:53 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by smtp3.osuosl.org (Postfix) with ESMTPS id 99A9260672 for ; Mon, 8 Mar 2021 12:28:53 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1615206531; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=Pj0+lsoXMYSDviFMNu3CfGDulAqhBZd0duxurV0jt/k=; b=ullbjypHk4a2OSdXRZBXV7LzXx1wRPq0P3DUkuf3g00TxnX2Kvmikn2mvZgT5yu1bK+GT9 Pb18L02feaPu+UmwjPoQNvBkbpJDORl8H6ArZ/XWAobYvxZmsd1kHtOeWcA3mN+bVvHI/I evXt2ltyGZ054ZgETkOoGM4IjjxGEog= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id EE520ADCD; Mon, 8 Mar 2021 12:28:50 +0000 (UTC) To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, x86@kernel.org, virtualization@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, kvm@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH v5 00/12] x86: major paravirt cleanup Date: Mon, 8 Mar 2021 13:28:32 +0100 Message-Id: <20210308122844.30488-1-jgross@suse.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Cc: Wanpeng Li , Peter Zijlstra , Catalin Marinas , "H. Peter Anvin" , Will Deacon , Ard Biesheuvel , Wei Liu , Stefano Stabellini , Stephen Hemminger , Joerg Roedel , Russell King , "VMware, Inc." , Ingo Molnar , Haiyang Zhang , Steven Rostedt , Nathan Chancellor , Jason Baron , Borislav Petkov , Andy Lutomirski , Josh Poimboeuf , Thomas Gleixner , Jim Mattson , Juergen Gross , Boris Ostrovsky , Sean Christopherson , Nick Desaulniers , Paolo Bonzini X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Juergen Gross via Virtualization Reply-To: Juergen Gross Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" This is a major cleanup of the paravirt infrastructure aiming at eliminating all custom code patching via paravirt patching. This is achieved by using ALTERNATIVE instead, leading to the ability to give objtool access to the patched in instructions. In order to remove most of the 32-bit special handling from pvops the time related operations are switched to use static_call() instead. At the end of this series all paravirt patching has to do is to replace indirect calls with direct ones. In a further step this could be switched to static_call(), too. Changes in V5: - patches 1-5 of V4 dropped, as already applied - new patches 1+3 - fixed patch 2 - split V4 patch 8 into patches 4+5 - use flag byte instead of negative feature bit for "not feature" Changes in V4: - fixed several build failures - removed objtool patch, as objtool patches are in tip now - added patch 1 for making usage of static_call easier - even more cleanup Changes in V3: - added patches 7 and 12 - addressed all comments Changes in V2: - added patches 5-12 Juergen Gross (12): staticcall: move struct static_call_key definition to static_call_types.h x86/paravirt: switch time pvops functions to use static_call() x86/alternative: drop feature parameter from ALTINSTR_REPLACEMENT() x86/alternative: support not-feature x86/alternative: support ALTERNATIVE_TERNARY x86: add new features for paravirt patching x86/paravirt: remove no longer needed 32-bit pvops cruft x86/paravirt: simplify paravirt macros x86/paravirt: switch iret pvops to ALTERNATIVE x86/paravirt: add new macros PVOP_ALT* supporting pvops in ALTERNATIVEs x86/paravirt: switch functions with custom code to ALTERNATIVE x86/paravirt: have only one paravirt patch function arch/arm/include/asm/paravirt.h | 14 +- arch/arm/kernel/paravirt.c | 9 +- arch/arm64/include/asm/paravirt.h | 14 +- arch/arm64/kernel/paravirt.c | 13 +- arch/x86/Kconfig | 1 + arch/x86/entry/entry_32.S | 4 +- arch/x86/entry/entry_64.S | 2 +- arch/x86/include/asm/alternative-asm.h | 10 + arch/x86/include/asm/alternative.h | 28 ++- arch/x86/include/asm/cpufeature.h | 2 + arch/x86/include/asm/cpufeatures.h | 2 + arch/x86/include/asm/irqflags.h | 7 +- arch/x86/include/asm/mshyperv.h | 2 +- arch/x86/include/asm/paravirt.h | 167 +++++++------- arch/x86/include/asm/paravirt_types.h | 210 +++++++----------- arch/x86/kernel/Makefile | 3 +- arch/x86/kernel/alternative.c | 37 ++- arch/x86/kernel/asm-offsets.c | 7 - arch/x86/kernel/cpu/vmware.c | 5 +- arch/x86/kernel/kvm.c | 2 +- arch/x86/kernel/kvmclock.c | 2 +- arch/x86/kernel/paravirt-spinlocks.c | 9 + arch/x86/kernel/paravirt.c | 78 ++----- arch/x86/kernel/paravirt_patch.c | 99 --------- arch/x86/kernel/tsc.c | 2 +- arch/x86/xen/enlighten_pv.c | 4 +- arch/x86/xen/time.c | 11 +- drivers/xen/time.c | 3 +- include/linux/static_call.h | 18 -- include/linux/static_call_types.h | 18 ++ tools/include/linux/static_call_types.h | 18 ++ tools/objtool/arch/x86/include/arch/special.h | 6 +- 32 files changed, 339 insertions(+), 468 deletions(-) delete mode 100644 arch/x86/kernel/paravirt_patch.c -- 2.26.2 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization