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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41114C433EF for ; Fri, 18 Feb 2022 17:16:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238406AbiBRRQS (ORCPT ); Fri, 18 Feb 2022 12:16:18 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:43452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238228AbiBRRPR (ORCPT ); Fri, 18 Feb 2022 12:15:17 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA8B74D278 for ; Fri, 18 Feb 2022 09:14:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=3jolC4QFVpJxiV+fv/bIh9hbxDawI/fQtnAbEJQqZr0=; b=TmHB6iaAgBbD7pJS0wTFoas9bb B9g6I5uXayEbr7QmTmGcEFCt7fxIdFwOdMLm8WfCiJCD1Ow6LjlL+TvQjy49/odrNWStgVM0jtayk sZpg8/0Hcvdk+EiSOiJbxcBpdg0l5ZwG70+HJYBz7JDRW1Jl064goouAGkyy1tSFC/nVOmxXqTKw0 7kJ4hmZA/s6ANiU3eKoMZaH/Cl/KP3gNGWY7G6TE/0ojo3rqkSs4GCWeObxDvNbGmj1+5C2fXSL5t akIQVIiB7BobgRwydN41MwWQyMJlSKX1WLNsGfcKifoQocsevBRjaSvkm51qpeINuJbZb5rjJcuoO lU/0mDuw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nL6q9-00AsBP-6P; Fri, 18 Feb 2022 17:14:41 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 430F930026F; Fri, 18 Feb 2022 18:14:39 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 07ED0203C1C84; Fri, 18 Feb 2022 18:14:39 +0100 (CET) Message-ID: <20220218171408.691941184@infradead.org> User-Agent: quilt/0.66 Date: Fri, 18 Feb 2022 17:49:04 +0100 From: Peter Zijlstra To: x86@kernel.org, joao@overdrivepizza.com, hjl.tools@gmail.com, jpoimboe@redhat.com, andrew.cooper3@citrix.com Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, ndesaulniers@google.com, keescook@chromium.org, samitolvanen@google.com, mark.rutland@arm.com, alyssa.milburn@intel.com, Juergen Gross Subject: [PATCH 02/29] x86/module: Fix the paravirt vs alternative order References: <20220218164902.008644515@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ever since commit 4e6292114c741 ("x86/paravirt: Add new features for paravirt patching") there is an ordering dependency between patching paravirt ops and patching alternatives, the module loader still violates this. Fixes: 4e6292114c741 ("x86/paravirt: Add new features for paravirt patching") Cc: Juergen Gross Signed-off-by: Peter Zijlstra (Intel) --- arch/x86/kernel/module.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) --- a/arch/x86/kernel/module.c +++ b/arch/x86/kernel/module.c @@ -272,6 +272,10 @@ int module_finalize(const Elf_Ehdr *hdr, retpolines = s; } + if (para) { + void *pseg = (void *)para->sh_addr; + apply_paravirt(pseg, pseg + para->sh_size); + } if (retpolines) { void *rseg = (void *)retpolines->sh_addr; apply_retpolines(rseg, rseg + retpolines->sh_size); @@ -289,11 +293,6 @@ int module_finalize(const Elf_Ehdr *hdr, tseg, tseg + text->sh_size); } - if (para) { - void *pseg = (void *)para->sh_addr; - apply_paravirt(pseg, pseg + para->sh_size); - } - /* make jump label nops */ jump_label_apply_nops(me);