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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 8B899C742A2 for ; Thu, 11 Jul 2019 20:17:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 38A4F21537 for ; Thu, 11 Jul 2019 20:17:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 38A4F21537 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CC1EF8E00F8; Thu, 11 Jul 2019 16:17:27 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C72C08E00DB; Thu, 11 Jul 2019 16:17:27 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B131F8E00F8; Thu, 11 Jul 2019 16:17:27 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from mail-yw1-f72.google.com (mail-yw1-f72.google.com [209.85.161.72]) by kanga.kvack.org (Postfix) with ESMTP id 8E0E08E00DB for ; Thu, 11 Jul 2019 16:17:27 -0400 (EDT) Received: by mail-yw1-f72.google.com with SMTP id b188so5984773ywb.10 for ; Thu, 11 Jul 2019 13:17:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:date:from:to :cc:subject:references:mime-version:content-disposition:in-reply-to :user-agent:message-id; bh=qziThXBBDBww5HpD4tsDVFG8ojwFCeNQs2KfyoG9baA=; b=n1rvpo9RmXkmjFC30NlP0GSjOBEtrAoHChjIqwZl/EgFQPTVdcKy3Kc+V8pO3g0kk4 oBXsDQ3lS6NFUMdH2/8Cahm+I5hJb/c1Q69kywdESPxGtxiNVXXIgHFBXNAqVBDmUOdZ jvbRkGXjBc5rHfizl6zdsBLL3Or0AWDl+U8Eb0XU8wA8PDPeUK/dI3/QjUwUsJxnGYkN DZSuNfvvjTxt0KMYAJKI94fVNZerHHLHcLOT+tKFBA0KZ44b+y/K4HpzTq1Y6K23UAEl QTvniQ5SxVppmqOvKrTpn1lMxclcIleDU6/VixSUL/0llR8CQRkAWM70zDZgm8KRgJ+D FIrA== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of rppt@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=rppt@linux.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com X-Gm-Message-State: APjAAAXFYElPoZlgta8x8md0fkg3PUx2Mjmvr4+2Ls52k/DMKEX8Pd7L VzHkMgMgi37+LJCTfjO6VuBY8sBCjcuOaCAwHdfxPZXMTHq01c1PwW/FHLwXfiRCgmz4NBvRxqH bISIl2z6NbMC7PS954lcn0gu+2ZukW1vlYVQPD6VFxtcgwARwmhqyurf1MrsXIujqeQ== X-Received: by 2002:a81:3795:: with SMTP id e143mr3608030ywa.508.1562876247353; Thu, 11 Jul 2019 13:17:27 -0700 (PDT) X-Google-Smtp-Source: APXvYqw31p5MqTsZO/G7WMo+lWegoR00FrHD6hqmHRdVv7sNcfrIcTRrWjRbFRkZiFlM+6w1OAVD X-Received: by 2002:a81:3795:: with SMTP id e143mr3608000ywa.508.1562876246794; Thu, 11 Jul 2019 13:17:26 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1562876246; cv=none; d=google.com; s=arc-20160816; b=nOAY03/CI7kYYHRwDpGXn/7JLutbMYT1+QUVZsOtRf3JxtjUTsuTS3vTrvZ0qu8Ht0 qfMIO8HapoYPV+ttwbv4j8hZGP1SlpQCkXGaLGt6DZy032MzBXFXvf2QM/sIkl4KZXQX 0T+zSi7czsfRdS116Tt0it5S1soGrRaU3Z+EMEVgUpGT2ASvGGfwf4vOrgmHzu0199Hl YeooRrsHRt7NRKzeiUnh42XU6t6Li8a9UFQn97ph97N9VKe+yYq6el9FrrOVzIRlPGVU DQr3/gEgxQn93kYDKeQuDoS0ecqaIHex6qrwpea4BwE+8d2mNt+tq3PI3SEWq8uO7Cmq xVog== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=message-id:user-agent:in-reply-to:content-disposition:mime-version :references:subject:cc:to:from:date; bh=qziThXBBDBww5HpD4tsDVFG8ojwFCeNQs2KfyoG9baA=; b=omGtYHrlwJy3LGoXbNLHqv7bYEWhJlWp+JA5VYhZyw6yMuTwN0eqFn+cQ5lX2occch WkZNSWL3cPFBfwJxAx1MLF+Kgy/IwtTSCguzTalZDJ7igb1mLnwmL9JM0y+14LF5NDV1 aawYF9DPzk+mWyurkEq5Zy+rOLIC6IDAmcytH1r4UVACpOBQKk72zeY+MEyOhIBNNt9v 4u5E8F3lRSUJojxiNPAvdtjTJ6MiEnVbhVxST5q9pjtpItCJaemc1s1G4vFCXVnFLrem gYPD2mJI//S136+y/FbfgVAABYJ7LD88gZhg6vZfdcHxeynW27nQ/x7/cXaQaOVM635Y r/aQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of rppt@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=rppt@linux.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com. [148.163.158.5]) by mx.google.com with ESMTPS id d22si2480119ywd.42.2019.07.11.13.17.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Jul 2019 13:17:26 -0700 (PDT) Received-SPF: pass (google.com: domain of rppt@linux.ibm.com designates 148.163.158.5 as permitted sender) client-ip=148.163.158.5; Authentication-Results: mx.google.com; spf=pass (google.com: domain of rppt@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=rppt@linux.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x6BKHOOm103739 for ; Thu, 11 Jul 2019 16:17:26 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2tp960q4un-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 11 Jul 2019 16:17:26 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 11 Jul 2019 21:17:21 +0100 Received: from b06cxnps4075.portsmouth.uk.ibm.com (9.149.109.197) by e06smtp03.uk.ibm.com (192.168.101.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 11 Jul 2019 21:17:15 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x6BKHErw49217562 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 11 Jul 2019 20:17:14 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4BFD152052; Thu, 11 Jul 2019 20:17:14 +0000 (GMT) Received: from rapoport-lnx (unknown [9.148.204.152]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id 2AD435205A; Thu, 11 Jul 2019 20:17:09 +0000 (GMT) Date: Thu, 11 Jul 2019 23:17:07 +0300 From: Mike Rapoport To: Andi Kleen Cc: Alexandre Chartre , 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 Subject: Re: [RFC v2 02/26] mm/asi: Abort isolation on interrupt, exception and context switch References: <1562855138-19507-1-git-send-email-alexandre.chartre@oracle.com> <1562855138-19507-3-git-send-email-alexandre.chartre@oracle.com> <874l3sz5z4.fsf@firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <874l3sz5z4.fsf@firstfloor.org> User-Agent: Mutt/1.5.24 (2015-08-30) X-TM-AS-GCONF: 00 x-cbid: 19071120-0012-0000-0000-00000331E9C1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19071120-0013-0000-0000-0000216B57DD Message-Id: <20190711201706.GB20140@rapoport-lnx> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-07-11_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=956 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907110224 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Jul 11, 2019 at 01:11:43PM -0700, Andi Kleen wrote: > Alexandre Chartre writes: > > jmp paranoid_exit > > @@ -1182,6 +1196,16 @@ ENTRY(paranoid_entry) > > xorl %ebx, %ebx > > > > 1: > > +#ifdef CONFIG_ADDRESS_SPACE_ISOLATION > > + /* > > + * If address space isolation is active then abort it and return > > + * the original kernel CR3 in %r14. > > + */ > > + ASI_START_ABORT_ELSE_JUMP 2f > > + movq %rdi, %r14 > > + ret > > +2: > > +#endif > > Unless I missed it you don't map the exception stacks into ASI, so it > has likely already triple faulted at this point. The exception stacks are in the CPU entry area, aren't they? > -Andi > -- Sincerely yours, Mike.