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=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 2095AC47076 for ; Fri, 21 May 2021 17:51:34 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 DB427608FE for ; Fri, 21 May 2021 17:51:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB427608FE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:Cc:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=6MPNB/B5bQiwAu+Sewaumuwqs0Gcwy8j6HFqlBzCvaQ=; b=mOstn1Nr1v1CQSTkC2waSN08H3 qsSXsboDCCBmDDMx9xnGeQ8w6SeHDKjNfVyXv5qFEcII+uDJA23cxi8YTfxq9GWW1f7k3d3pIX1op a7WYhMlcroNNKtqSEwr+hlA9tK2R2vrzAcfexsBNCkxK/w0dZS2aUokSNcm4z+7z9enbB4rGuAVNy 3mCRMUdI9ch/rAEr2t4OV+gcuTaE3DaCH2/XGu84mtBjYGuLhO01KiKyfzfxqC0SVhjlhByit4u2Y 73B8fkQqK0+jBkRrDARi5/vDhGP+ipRFM7yClZ8WtQ95CoaqjaaHdLfhR4qgTIByhNzDGIvXC2Znj SVW5oq9A==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lk9Hf-000bd7-J8; Fri, 21 May 2021 17:50:05 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lk9GI-000b2d-Sf for linux-arm-kernel@desiato.infradead.org; Fri, 21 May 2021 17:48:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To: Subject:Sender:Reply-To:Content-ID:Content-Description; bh=vU/JTuWi3C5fB8RNIolLlnI9ipYsWSFq874acAyf40w=; b=hHMCLJYUHvH2Z8a7mXu4qX/LIQ U7492yw5+U7N+zSdlHnN50xtlZbZa7nvpBwZmB8pa6N0ddlRC6wRjEMXbtrnT0IR7vllwXi9rabxJ YiXtNm2Ufr7c1ZJHo8qReTxC60mdnhoFu66JJ1xyBH2IzvRzJUIgi9AsEe71u0LFkDYeZYQ/yGjqr 5lc+JrLN8IF1pD5I8EEt3rET6KC9CncId8VoZWvAyYVS4BMSbzJo7WG3E8OG8pue4nJg51mc792Mx d9kTC7zTNklTneVlz8FMRJcdHezXeNufrMNWfZHbYA/laibALi0t7i7OxxDig1LLysRtOvR1FVvSq v/MwPEnw==; Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lk9GG-00HKTZ-21 for linux-arm-kernel@lists.infradead.org; Fri, 21 May 2021 17:48:37 +0000 Received: from [192.168.254.32] (unknown [47.187.214.213]) by linux.microsoft.com (Postfix) with ESMTPSA id A2F2A20B7188; Fri, 21 May 2021 10:48:34 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com A2F2A20B7188 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1621619315; bh=vU/JTuWi3C5fB8RNIolLlnI9ipYsWSFq874acAyf40w=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=VbNgyb8BxOjzNrhqJ1+kLXKgpAdDz0/s4fsSb5gh6kosis6ztaDaiL82PhCuKiRPP 48ZhbmMBBUPNIZi8+/Cr6rsLxZ7cibrDZSGtL0OAMObMfxaF3d9NrUkBLg17VGZ7Pz oRpzGr3BjYbst42wOW9ZN1L+zKbLHhowyOPtQIJI= Subject: Re: [RFC PATCH v4 0/2] arm64: Stack trace reliability checks in the unwinder To: Mark Brown Cc: mark.rutland@arm.com, jpoimboe@redhat.com, ardb@kernel.org, jthierry@redhat.com, catalin.marinas@arm.com, will@kernel.org, jmorris@namei.org, pasha.tatashin@soleen.com, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org References: <68eeda61b3e9579d65698a884b26c8632025e503> <20210516040018.128105-1-madvenka@linux.microsoft.com> <20210521171808.GC5825@sirena.org.uk> <654dde25-e6a2-a1e7-c2d7-e2692bc11528@linux.microsoft.com> <20210521174702.GE5825@sirena.org.uk> From: "Madhavan T. Venkataraman" Message-ID: <1feec2ba-538b-e28d-1e03-ac9c1af43842@linux.microsoft.com> Date: Fri, 21 May 2021 12:48:34 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20210521174702.GE5825@sirena.org.uk> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210521_104836_151015_F21BBB97 X-CRM114-Status: GOOD ( 15.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/21/21 12:47 PM, Mark Brown wrote: > On Fri, May 21, 2021 at 12:32:52PM -0500, Madhavan T. Venkataraman wrote: > >> I have followed the example in the Kprobe deny list. I place the section >> in initdata so it can be unloaded during boot. This means that I need to >> copy the information before that in early_initcall(). > >> If the initialization must be performed on first use, I probably have to >> move SYM_CODE_FUNCTIONS from initdata to some other place where it will >> be retained. > >> If you prefer this, I could do it this way. > > No, I think if people are fine with this for kprobes they should be fine > with it here too and if not we can always incrementally improve > performance - let's just keep things simple and easy to understand for > now. > OK. Madhavan _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel