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=-5.8 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 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 54CFFC48BDF for ; Thu, 24 Jun 2021 09:56:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F38D613F9 for ; Thu, 24 Jun 2021 09:56:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232179AbhFXJ6V (ORCPT ); Thu, 24 Jun 2021 05:58:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232156AbhFXJ6U (ORCPT ); Thu, 24 Jun 2021 05:58:20 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 039B4C061574 for ; Thu, 24 Jun 2021 02:56:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Subject:Cc:To:From:Date:Message-ID: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To:References; bh=QCQHDmmZyyOQ8GgC66T6KReifyiUt2RRh+YVjbBaxvA=; b=HB0IeUCiDME0cLHwRlz+gHN9Sp iEgvzL5OdG3qwEi7e2cYPBOgIQmY0mr2MhAHZn+D8IYaZAW/MMUjv4p9afwTYp3Ntc7cj5JMilgpx VLAEhfySR2Tw0qkSBtaZRJsI3zs1KMaQZH9H4dEZnZTeWImjqxBvCk4jmao97TcmEndP/0A3UtYuU cHj+i7Q98yFVil04r2hNuLwoC4YAT/o5bcSj66hPF5DcyvikWaMLRuKyE3I33SPXwnoorfdy4GsPz Y1NsZHdUA+QcV1Ks43C0R4uXG7jjDJf8lYoWtKK7kTZmJ4kuw3uzR6xzZ9jIgruOtXVOHBmIP8Eh4 mxhKh3uw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1lwM40-00GQOY-TG; Thu, 24 Jun 2021 09:54:28 +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 (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id D41D030022B; Thu, 24 Jun 2021 11:54:23 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 9791E2B64C05D; Thu, 24 Jun 2021 11:54:23 +0200 (CEST) Message-ID: <20210624094059.886075998@infradead.org> User-Agent: quilt/0.66 Date: Thu, 24 Jun 2021 11:40:59 +0200 From: Peter Zijlstra To: jpoimboe@redhat.com, tglx@linutronix.de Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, joro@8bytes.org, boris.ostrovsky@oracle.com, jgross@suse.com, x86@kernel.org, mbenes@suse.com, rostedt@goodmis.org, dvyukov@google.com, elver@google.com Subject: [PATCH v2 00/24] objtool/x86: noinstr vs PARAVIRT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Per long standing request from Thomas, this makes the noinstr validation work with PARAVIRT=y. It isn't exactly pretty, but it does work. With all this on top of tip/master (which includes some of the previous round), all (*) the robots seem to get is endless garbage like: vmlinux.o: warning: objtool: __rdgsbase_inactive()+0x24: call to ftrace_likely_update() leaves .noinstr.text section And my secret plan is to pull the KPTI CR3 swizzling into C such that all that will insta explode and become unfixable. Steve, can I please delete TRACE_BRANCH_PROFILING and PROFILE_ALL_BRANCHES already? (*) there were also a few reports from 0day running out of memory.