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=-7.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 8B226C433E0 for ; Wed, 17 Feb 2021 08:16:38 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 15EEE64E2E for ; Wed, 17 Feb 2021 08:16:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 15EEE64E2E Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.86142.161357 (Exim 4.92) (envelope-from ) id 1lCI0Y-0001Tu-95; Wed, 17 Feb 2021 08:16:26 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 86142.161357; Wed, 17 Feb 2021 08:16:26 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lCI0Y-0001Tn-5b; Wed, 17 Feb 2021 08:16:26 +0000 Received: by outflank-mailman (input) for mailman id 86142; Wed, 17 Feb 2021 08:16:25 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lCI0X-0001Ti-81 for xen-devel@lists.xenproject.org; Wed, 17 Feb 2021 08:16:25 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 88919c7c-27dc-4eb2-b48d-ba0d520c285e; Wed, 17 Feb 2021 08:16:24 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id B7242AFF1; Wed, 17 Feb 2021 08:16:23 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 88919c7c-27dc-4eb2-b48d-ba0d520c285e 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=1613549783; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=wkFJ/b05L0J/NukyWmjGp+kEZkAv1xGr0xeiUNwWK/w=; b=KdPnlmPHlzQfK0Wz1c7Wj9W/mNsWgoszF16+GESNvky6Z8/zQcaTd6KrslfsEoHiYh+DRe JQChSMjaF63949Ol0LP3oFsxQmp+bBFOvazW0UvKV5hnigOTPj7juPaOlgc6GXh2+BJDS8 GPZ6q5lIBn0Zad5b4PRd9zEiHNjOUgE= From: Jan Beulich Subject: [PATCH v2 0/8] x86/PV: avoid speculation abuse through guest accessors To: "xen-devel@lists.xenproject.org" , Ian Jackson Cc: Andrew Cooper , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , George Dunlap Message-ID: Date: Wed, 17 Feb 2021 09:16:19 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Re-sending primarily for the purpose of getting a release ack, an explicit release nak, or an indication of there not being a need, all for at least the first three patches here (which are otherwise ready to go in). I've dropped the shadow part of the series from this re-submission, because it has all got reviewed by Tim already and is intended for 4.16 only anyway. I'm re-including the follow up patches getting the code base in consistent shape again, as I continue to think this consistency goal is at least worth a consideration towards a freeze exception. 1: split __{get,put}_user() into "guest" and "unsafe" variants 2: split __copy_{from,to}_user() into "guest" and "unsafe" variants 3: PV: harden guest memory accesses against speculative abuse 4: rename {get,put}_user() to {get,put}_guest() 5: gdbsx: convert "user" to "guest" accesses 6: rename copy_{from,to}_user() to copy_{from,to}_guest_pv() 7: move stac()/clac() from {get,put}_unsafe_asm() ... 8: PV: use get_unsafe() instead of copy_from_unsafe() Jan