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 42C49C433E0 for ; Wed, 20 Jan 2021 13:56:12 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 C2931233EB for ; Wed, 20 Jan 2021 13:56:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C2931233EB 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 whitealder.osuosl.org (Postfix) with ESMTP id 39AFC86A62; Wed, 20 Jan 2021 13:56:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AtfFPM0v79Bu; Wed, 20 Jan 2021 13:56:08 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 7826386A10; Wed, 20 Jan 2021 13:56:05 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 560B6C1DA7; Wed, 20 Jan 2021 13:56:05 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id E32E1C013A for ; Wed, 20 Jan 2021 13:56:03 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 8B2172076F for ; Wed, 20 Jan 2021 13:56:03 +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 7so6jO-gNw7u for ; Wed, 20 Jan 2021 13:56:02 +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 silver.osuosl.org (Postfix) with ESMTPS id BA99C203E1 for ; Wed, 20 Jan 2021 13:56:01 +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=1611150960; 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=+aDp550Lm+rofMztKr13LGN261/aN33kUiCXnXHZSts=; b=u4mfyPjhhiICRVasCe0gx5uHwLGuJfO0Nwh5LmCImg6SvGFgunQvHFOMzVuArWuXyLPN7Q 4VZ3QphBnnd7lfNQ+5cqvlSCQ1z2HTK1jtA49OjLiu40GNx+iyhykAfICdGYMvGmMsI5V7 u7RmQtSlG0WNBRDlF79PQzqxwc1CKgo= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id D8566ADD3; Wed, 20 Jan 2021 13:55:59 +0000 (UTC) To: xen-devel@lists.xenproject.org, 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 14:55:40 +0100 Message-Id: <20210120135555.32594-1-jgross@suse.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Cc: Wanpeng Li , Peter Zijlstra , Michal Hocko , Nathan Chancellor , "H. Peter Anvin" , Thomas Gleixner , Wei Liu , Stefano Stabellini , Stephen Hemminger , Joerg Roedel , Daniel Lezcano , Ard Biesheuvel , "VMware, Inc." , Ingo Molnar , Mel Gorman , "Paul E . McKenney" , Haiyang Zhang , Steven Rostedt , Jason Baron , Borislav Petkov , Andy Lutomirski , Josh Poimboeuf , Boris Ostrovsky , Jim Mattson , Juergen Gross , 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" [Resend due to all the Cc:'s missing] 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