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 B6AA6C433E0 for ; Wed, 20 Jan 2021 13:26:23 +0000 (UTC) Received: from silver.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 179C22339D for ; Wed, 20 Jan 2021 13:26:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 179C22339D 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 silver.osuosl.org (Postfix) with ESMTP id 45BCC2094C; Wed, 20 Jan 2021 13:26:22 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KcFKrWKG4J4y; Wed, 20 Jan 2021 13:26:19 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 38BCC20778; Wed, 20 Jan 2021 13:26:19 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 0D440C0FA8; Wed, 20 Jan 2021 13:26:19 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 63144C013A for ; Wed, 20 Jan 2021 13:26:17 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 4A2D585F35 for ; Wed, 20 Jan 2021 13:26:17 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id S7xYFgvZhDH7 for ; Wed, 20 Jan 2021 13:26:16 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 3A6EA85F33 for ; Wed, 20 Jan 2021 13:26:16 +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=1611149174; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=CpmyovsicWRsraKS/oNts+zojxJvItjt3KCZ7hy85ig=; b=YoQQYyi997NN0sL65a0YYcDujYywf5i4Ag7KpzfJ88RqXywvxFU4fjjUrkFdBLLs+2EdEe FmwSt0fjJPJqEsQNSSKHl7g8Q0WLZeDQLdTCe9dgWo8A2HWnLWPkj1p1QYY+Qctq5Ar+lD Wn2hf5TRnZUn4VzS1ZuroHV9nujUBC0= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 0F7E4AAAE; Wed, 20 Jan 2021 13:26:14 +0000 (UTC) To: bpetkov@suse.com, linux-kernel@vger.kernel.org, x86@kernel.org, virtualization@lists.linux-foundation.org, linux-hyperv@vger.kernel.org, kvm@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH v4 00/15] x86: major paravirt cleanup Date: Wed, 20 Jan 2021 14:25:58 +0100 Message-Id: <20210120132613.31487-1-jgross@suse.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 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, but that would require a major header file disentangling. For a clean build without any objtool warnings a modified objtool is required. Currently this is available in the "tip" tree in the objtool/core branch. 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 (14): x86/xen: use specific Xen pv interrupt entry for MCE x86/xen: use specific Xen pv interrupt entry for DF x86/pv: switch SWAPGS to ALTERNATIVE x86/xen: drop USERGS_SYSRET64 paravirt call x86: rework arch_local_irq_restore() to not use popf x86/paravirt: switch time pvops functions to use static_call() x86/alternative: support "not feature" and 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 Peter Zijlstra (1): static_call: Pull some static_call declarations to the type headers arch/x86/Kconfig | 1 + arch/x86/entry/entry_32.S | 4 +- arch/x86/entry/entry_64.S | 28 ++- arch/x86/include/asm/alternative-asm.h | 4 + arch/x86/include/asm/alternative.h | 7 + arch/x86/include/asm/cpufeatures.h | 2 + arch/x86/include/asm/idtentry.h | 6 + arch/x86/include/asm/irqflags.h | 53 ++---- arch/x86/include/asm/mshyperv.h | 2 +- arch/x86/include/asm/paravirt.h | 197 ++++++++------------ arch/x86/include/asm/paravirt_types.h | 227 +++++++++--------------- arch/x86/kernel/Makefile | 3 +- arch/x86/kernel/alternative.c | 49 ++++- arch/x86/kernel/asm-offsets.c | 7 - arch/x86/kernel/asm-offsets_64.c | 3 - arch/x86/kernel/cpu/vmware.c | 5 +- arch/x86/kernel/irqflags.S | 11 -- arch/x86/kernel/kvm.c | 2 +- arch/x86/kernel/kvmclock.c | 2 +- arch/x86/kernel/paravirt-spinlocks.c | 9 + arch/x86/kernel/paravirt.c | 83 +++------ arch/x86/kernel/paravirt_patch.c | 109 ------------ arch/x86/kernel/tsc.c | 2 +- arch/x86/xen/enlighten_pv.c | 36 ++-- arch/x86/xen/irq.c | 23 --- arch/x86/xen/time.c | 11 +- arch/x86/xen/xen-asm.S | 52 +----- arch/x86/xen/xen-ops.h | 3 - drivers/clocksource/hyperv_timer.c | 5 +- drivers/xen/time.c | 2 +- include/linux/static_call.h | 20 --- include/linux/static_call_types.h | 27 +++ tools/include/linux/static_call_types.h | 27 +++ 33 files changed, 376 insertions(+), 646 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