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=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 90615C07E9C for ; Fri, 9 Jul 2021 18:09:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 77E9F61241 for ; Fri, 9 Jul 2021 18:09:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230239AbhGISMb (ORCPT ); Fri, 9 Jul 2021 14:12:31 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:46227 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230116AbhGISM2 (ORCPT ); Fri, 9 Jul 2021 14:12:28 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1625854184; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=aMQ8DqHMVD67i2Qp6KYCUt8nJ4P3kjVGOwpx/lcfqOM=; b=fe0X8MhyiiPi5fMNjMBtTUsVhT0IolTgxqbSvh2Itd0SDuF8awELLuJdzXtW4wlQH9Itut y4i2mMItxaKgiNdgFf069OoNVwXfqr1tqtknLv6YY6pY8npA9vrb7WTf2510GdNjA2FDno 0XumMSgNqqUjEEEt3j8JHl8KzOg8+VQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-413-7f5vjMhhOR2HzeIauVtuaQ-1; Fri, 09 Jul 2021 14:09:43 -0400 X-MC-Unique: 7f5vjMhhOR2HzeIauVtuaQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 453BA19067E0; Fri, 9 Jul 2021 18:09:42 +0000 (UTC) Received: from fuller.cnet (ovpn-112-4.gru2.redhat.com [10.97.112.4]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7E110100164A; Fri, 9 Jul 2021 18:09:38 +0000 (UTC) Received: by fuller.cnet (Postfix, from userid 1000) id 4B8F7416952E; Fri, 9 Jul 2021 15:09:28 -0300 (-03) Message-ID: <20210709174428.188395898@fuller.cnet> User-Agent: quilt/0.66 Date: Fri, 09 Jul 2021 14:37:28 -0300 From: Marcelo Tosatti To: linux-kernel@vger.kernel.org Cc: Christoph Lameter , Thomas Gleixner , Frederic Weisbecker , Juri Lelli , Nitesh Lal , Peter Zijlstra , Nicolas Saenz , Marcelo Tosatti Subject: [patch 2/5] common entry: add hook for isolation to __syscall_exit_to_user_mode_work References: <20210709173726.457181806@fuller.cnet> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This hook will be used by the next patch to perform synchronization of per-CPU vmstats. Signed-off-by: Marcelo Tosatti Index: linux-2.6-vmstat-update/kernel/entry/common.c =================================================================== --- linux-2.6-vmstat-update.orig/kernel/entry/common.c +++ linux-2.6-vmstat-update/kernel/entry/common.c @@ -284,9 +284,18 @@ static void syscall_exit_to_user_mode_pr syscall_exit_work(regs, work); } +/* + * Isolaton specific exit to user mode preparation. Runs with interrupts + * enabled. + */ +static void isolation_exit_to_user_mode_prepare(void) +{ +} + static __always_inline void __syscall_exit_to_user_mode_work(struct pt_regs *regs) { syscall_exit_to_user_mode_prepare(regs); + isolation_exit_to_user_mode_prepare(); local_irq_disable_exit_to_user(); exit_to_user_mode_prepare(regs); }