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_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 2D579C742A4 for ; Fri, 12 Jul 2019 00:06:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05E17214AF for ; Fri, 12 Jul 2019 00:06:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=amacapital-net.20150623.gappssmtp.com header.i=@amacapital-net.20150623.gappssmtp.com header.b="x6iGf4L5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730453AbfGLAGB (ORCPT ); Thu, 11 Jul 2019 20:06:01 -0400 Received: from mail-io1-f65.google.com ([209.85.166.65]:32849 "EHLO mail-io1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728102AbfGLAGB (ORCPT ); Thu, 11 Jul 2019 20:06:01 -0400 Received: by mail-io1-f65.google.com with SMTP id z3so16634527iog.0 for ; Thu, 11 Jul 2019 17:06:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amacapital-net.20150623.gappssmtp.com; s=20150623; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=62nH5oWkGzOQ06SAu95rykYn8etGFCzWFiF4NkIvxBQ=; b=x6iGf4L5yWS+TipgGMZaTstAJSFZHmt4jOCyVxJXA05tn4AvQqO7XQ9jA/D7ymwATG PWuN9SzO9zG1m+PEuyKII10uOSL9gg/O57hI2huctP6Og913oIrwhV2UID0IFwMymSEZ pSxo0Php2i+/JqZ9P5rh6HvaKN6HtjCSw/3qwxiVDhGnI3DArpoc4m0F9IctT6DD1Di1 wu4AMH5pCym6cMoCHPWOZAcSY3xU4Avs8wRgU0TwfTmIVmwdhlW+aos08799MA2ewuTT YwY5vBW2TokBxQCwis69AwDoXaOek1HHnLZ9u/AICEFSungrKFs4ck9yFBleKW797VV8 NCMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=62nH5oWkGzOQ06SAu95rykYn8etGFCzWFiF4NkIvxBQ=; b=W/VgpJka/kPIpRiGFMGP4rCqDEiCDOcSCa66BoK5+ucHHGNEdj27EOnJQ2G5kZh2lw rtqJSFgtQGa9bIzo3aEn8NXnfsLJuQfI6FAOF0NvonjAKkEVLAj646BtPRbzo1YIqyEe 8KrAQAQe8zcC5SBEOJtbIU8us2O1SDRZjTlf9/0XilV5XuY5+bsXm1WkQnJRMys1cA2u Gj5vEWp67qONOrIGMBrg+GMGhwwEaYdWEzYV1WOhY4gMlZmppsu4AhRHIHjcDsD9OqLg OiKAbWkHi3SyJthUNZG1ORXjZv+iEXbbQZKgH9G98ZuJ/tI5GHTAV+xHwtFuT1eDPL+c LlHQ== X-Gm-Message-State: APjAAAUYuaj7ZA2VrX7FqaxsP/a3HUuvulVKmD3IBP+15+xjNfSKZ5C+ s0wcZYAvyB8JkdIMbUVgmWhORg== X-Google-Smtp-Source: APXvYqyEv1kc809mAGLveMhoHxeqWbWWXmWJlBsCCsN3LPsii0kASeeYoYXmRIGy/00rllieyCi4zA== X-Received: by 2002:a02:5a89:: with SMTP id v131mr8057345jaa.130.1562889960481; Thu, 11 Jul 2019 17:06:00 -0700 (PDT) Received: from ?IPv6:2601:281:200:3b79:24dc:faf7:acdc:387a? ([2601:281:200:3b79:24dc:faf7:acdc:387a]) by smtp.gmail.com with ESMTPSA id l5sm12084721ioq.83.2019.07.11.17.05.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Jul 2019 17:05:59 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (1.0) Subject: Re: [RFC v2 02/26] mm/asi: Abort isolation on interrupt, exception and context switch From: Andy Lutomirski X-Mailer: iPhone Mail (16F203) In-Reply-To: <1562855138-19507-3-git-send-email-alexandre.chartre@oracle.com> Date: Thu, 11 Jul 2019 18:05:58 -0600 Cc: pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, kvm@vger.kernel.org, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, konrad.wilk@oracle.com, jan.setjeeilers@oracle.com, liran.alon@oracle.com, jwadams@google.com, graf@amazon.de, rppt@linux.vnet.ibm.com Content-Transfer-Encoding: quoted-printable Message-Id: References: <1562855138-19507-1-git-send-email-alexandre.chartre@oracle.com> <1562855138-19507-3-git-send-email-alexandre.chartre@oracle.com> To: Alexandre Chartre Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org > On Jul 11, 2019, at 8:25 AM, Alexandre Chartre wrote: >=20 > Address space isolation should be aborted if there is an interrupt, > an exception or a context switch. Interrupt/exception handlers and > context switch code need to run with the full kernel address space. > Address space isolation is aborted by restoring the original CR3 > value used before entering address space isolation. >=20 NAK to the entry changes. That code you=E2=80=99re changing is already known= to be a bit buggy, and it=E2=80=99s spaghetti. PeterZ and I are gradually w= orking on fixing some bugs and C-ifying it. ASI can go on top.