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=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 4541BC433E7 for ; Tue, 1 Sep 2020 17:50:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2ACAB20866 for ; Tue, 1 Sep 2020 17:50:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="MgHej4kt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728079AbgIARu5 (ORCPT ); Tue, 1 Sep 2020 13:50:57 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:20609 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726244AbgIARu5 (ORCPT ); Tue, 1 Sep 2020 13:50:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1598982655; 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: in-reply-to:in-reply-to:references:references; bh=LJQ9qbxmQlGXiLqbEYSaeGjkLOhWAWXWbiUsuRzUZMg=; b=MgHej4kt+seujZyGpQvoqPG2yWC1yv4Wd0gGDcSRt+HQdV62ICZRBtpp9Pvzs/LFj16+k0 /INhxhldAuOXice/vTQBLekX6yvMEiO2NY8+hHetr/nGr0OTMkPLdusmmJde378JW9uY1z Jwo+QJU80rXubNaNFgf7csJ/n+ogi1Q= 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-356-0uJb2eE_NhiqiYY54UEPVA-1; Tue, 01 Sep 2020 13:50:51 -0400 X-MC-Unique: 0uJb2eE_NhiqiYY54UEPVA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 02495802B7E; Tue, 1 Sep 2020 17:50:48 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-113-228.ams2.redhat.com [10.36.113.228]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6923B5C1BB; Tue, 1 Sep 2020 17:50:34 +0000 (UTC) From: Florian Weimer To: "Yu, Yu-cheng" Cc: "H.J. Lu" , Dave Martin , Dave Hansen , Andy Lutomirski , X86 ML , "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , LKML , "open list:DOCUMENTATION" , Linux-MM , linux-arch , Linux API , Arnd Bergmann , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Weijiang Yang Subject: Re: [PATCH v11 25/25] x86/cet/shstk: Add arch_prctl functions for shadow stack References: <20200825002540.3351-1-yu-cheng.yu@intel.com> <20200825002540.3351-26-yu-cheng.yu@intel.com> <2d253891-9393-44d0-35e0-4b9a2da23cec@intel.com> <086c73d8-9b06-f074-e315-9964eb666db9@intel.com> <73c2211f-8811-2d9f-1930-1c5035e6129c@intel.com> <20200826164604.GW6642@arm.com> <87ft892vvf.fsf@oldenburg2.str.redhat.com> <20200826170841.GX6642@arm.com> <87tuwow7kg.fsf@oldenburg2.str.redhat.com> <873648w6qr.fsf@oldenburg2.str.redhat.com> <3c12b6ee-7c93-dcf4-fbf7-2698003386dd@intel.com> Date: Tue, 01 Sep 2020 19:50:32 +0200 In-Reply-To: <3c12b6ee-7c93-dcf4-fbf7-2698003386dd@intel.com> (Yu-cheng Yu's message of "Tue, 1 Sep 2020 10:49:01 -0700") Message-ID: <87o8mpqtcn.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Sender: linux-arch-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org * Yu-cheng Yu: > Like other arch_prctl()'s, this parameter was 'unsigned long' > earlier. The idea was, since this arch_prctl is only implemented for > the 64-bit kernel, we wanted it to look as 64-bit only. I will change > it back to 'unsigned long'. What about x32? In general, long is rather problematic for x32. Thanks, Florian