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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_GIT 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 4E334C2BA80 for ; Tue, 7 Apr 2020 07:28:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 234272064A for ; Tue, 7 Apr 2020 07:28:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="G12d6CgW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727867AbgDGH2J (ORCPT ); Tue, 7 Apr 2020 03:28:09 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:47134 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727763AbgDGH16 (ORCPT ); Tue, 7 Apr 2020 03:27:58 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0377Rk21152980; Tue, 7 Apr 2020 07:27:46 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=fmwJ6boFaoMUNdhsXf3ZCRqWn354NQrYvQa/zjOMXIQ=; b=G12d6CgWdIgVYv1VREZV+XfW6Zyy1GA4YJX2pT3IgIUqlfYcoH01ckD+R2+BIkTOOAY2 CM52uW5Yw1fke2WEH6S2ucjeoQryIgDJwhX2KLLV6vvAHhv0SMIbGAefwg0WtVY6ZwdA 908bk6YNiDT/C/irBa+3MzmAT0ShOarzL7Er2tla4gPkR1VAMdd+MB/3zggSjHpiRNV6 ciIA5Mgx1Jfj5M5vcRo98UxuGjOWVWKU6T0gPvjQvnOZEze1xYqe0+qftOg8m3U9q3Mq 0rTMxxUYz0aEgnN+Uy3iTqVLv7lkO6yb1/0uSTZp1iGK1dJ0sFZeCxDRRBwr2nK4jp0e fA== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by userp2130.oracle.com with ESMTP id 308ffd93ju-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 07 Apr 2020 07:27:46 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0377QdmS191108; Tue, 7 Apr 2020 07:27:46 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3030.oracle.com with ESMTP id 3073srhd7m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 07 Apr 2020 07:27:45 +0000 Received: from abhmp0006.oracle.com (abhmp0006.oracle.com [141.146.116.12]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 0377Rj2e032029; Tue, 7 Apr 2020 07:27:45 GMT Received: from linux-1.home (/92.157.90.160) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 07 Apr 2020 00:27:45 -0700 From: Alexandre Chartre To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, jpoimboe@redhat.com, peterz@infradead.org, jthierry@redhat.com, tglx@linutronix.de, alexandre.chartre@oracle.com Subject: [PATCH V2 9/9] x86/speculation: Remove all ANNOTATE_NOSPEC_ALTERNATIVE directives Date: Tue, 7 Apr 2020 09:31:42 +0200 Message-Id: <20200407073142.20659-10-alexandre.chartre@oracle.com> X-Mailer: git-send-email 2.18.2 In-Reply-To: <20200407073142.20659-1-alexandre.chartre@oracle.com> References: <20200407073142.20659-1-alexandre.chartre@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9583 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 phishscore=0 spamscore=0 malwarescore=0 suspectscore=13 adultscore=0 bulkscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004070062 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9583 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=13 priorityscore=1501 impostorscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 phishscore=0 mlxscore=0 bulkscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004070062 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that intra-function calls have been annotated and are supported by objtool, that retpoline return instructions have been annotated, and that __FILL_RETURN_BUFFER code is compatible with objtool, then all ANNOTATE_NOSPEC_ALTERNATIVE directives can be removed. Signed-off-by: Alexandre Chartre --- arch/x86/include/asm/nospec-branch.h | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h index 5ce2a40a26da..6480db4304a0 100644 --- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -124,7 +124,6 @@ */ .macro JMP_NOSPEC reg:req #ifdef CONFIG_RETPOLINE - ANNOTATE_NOSPEC_ALTERNATIVE ALTERNATIVE_2 __stringify(ANNOTATE_RETPOLINE_SAFE; jmp *\reg), \ __stringify(RETPOLINE_JMP \reg), X86_FEATURE_RETPOLINE, \ __stringify(lfence; ANNOTATE_RETPOLINE_SAFE; jmp *\reg), X86_FEATURE_RETPOLINE_AMD @@ -135,7 +134,6 @@ .macro CALL_NOSPEC reg:req #ifdef CONFIG_RETPOLINE - ANNOTATE_NOSPEC_ALTERNATIVE ALTERNATIVE_2 __stringify(ANNOTATE_RETPOLINE_SAFE; call *\reg), \ __stringify(RETPOLINE_CALL \reg), X86_FEATURE_RETPOLINE,\ __stringify(lfence; ANNOTATE_RETPOLINE_SAFE; call *\reg), X86_FEATURE_RETPOLINE_AMD @@ -150,7 +148,6 @@ */ .macro FILL_RETURN_BUFFER reg:req nr:req ftr:req #ifdef CONFIG_RETPOLINE - ANNOTATE_NOSPEC_ALTERNATIVE ALTERNATIVE "jmp .Lskip_rsb_\@", \ __stringify(__FILL_RETURN_BUFFER(\reg,\nr,%_ASM_SP)) \ \ftr @@ -174,7 +171,6 @@ * which is ensured when CONFIG_RETPOLINE is defined. */ # define CALL_NOSPEC \ - ANNOTATE_NOSPEC_ALTERNATIVE \ ALTERNATIVE_2( \ ANNOTATE_RETPOLINE_SAFE \ "call *%[thunk_target]\n", \ @@ -193,7 +189,6 @@ * here, anyway. */ # define CALL_NOSPEC \ - ANNOTATE_NOSPEC_ALTERNATIVE \ ALTERNATIVE_2( \ ANNOTATE_RETPOLINE_SAFE \ "call *%[thunk_target]\n", \ @@ -261,8 +256,7 @@ static inline void vmexit_fill_RSB(void) #ifdef CONFIG_RETPOLINE unsigned long loops; - asm volatile (ANNOTATE_NOSPEC_ALTERNATIVE - ALTERNATIVE("jmp 910f", + asm volatile (ALTERNATIVE("jmp 910f", __stringify(__FILL_RETURN_BUFFER(%0, RSB_CLEAR_LOOPS, %1)), X86_FEATURE_RETPOLINE) "910:" -- 2.18.2