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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 88C1CC43143 for ; Mon, 1 Oct 2018 06:25:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 430242083C for ; Mon, 1 Oct 2018 06:25:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 430242083C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728806AbeJANB1 (ORCPT ); Mon, 1 Oct 2018 09:01:27 -0400 Received: from mga04.intel.com ([192.55.52.120]:2123 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727693AbeJANB0 (ORCPT ); Mon, 1 Oct 2018 09:01:26 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Sep 2018 23:25:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,326,1534834800"; d="scan'208";a="261813821" Received: from linux.intel.com ([10.54.29.200]) by orsmga005.jf.intel.com with ESMTP; 30 Sep 2018 23:25:18 -0700 Received: from [10.125.252.7] (abudanko-mobl.ccr.corp.intel.com [10.125.252.7]) by linux.intel.com (Postfix) with ESMTP id C8857580141; Sun, 30 Sep 2018 23:25:14 -0700 (PDT) From: Alexey Budankov Subject: Re: [RFC 0/5] perf: Per PMU access controls (paranoid setting) To: Thomas Gleixner , Tvrtko Ursulin Cc: Kees Cook , Jann Horn , Tvrtko Ursulin , LKML , Peter Zijlstra , x86@kernel.org, "H. Peter Anvin" , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Madhavan Srinivasan , Andi Kleen References: <20180919122751.12439-1-tvrtko.ursulin@linux.intel.com> <0feb9867-0040-0306-a95b-4b6df1818312@linux.intel.com> Organization: Intel Corp. Message-ID: <044ce172-f0fb-4a78-e624-797b5bfe002c@linux.intel.com> Date: Mon, 1 Oct 2018 09:25:10 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On 28.09.2018 21:20, Thomas Gleixner wrote: > Start with something like Documentation/admin-guide/perf-security.rst or > whatever name fits better and add a proper documentation for the existing > knob. With the infrastructure for fine grained access control add the > general explanation for fine grained access control. With each PMU which > opt's in for the knob, add a section with guidance about scope and risk for > this particular one. Sounds like a plan. Thanks! BR, Alexey > > Thanks, > > tglx > > >