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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED, USER_AGENT_MUTT 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 94953C43441 for ; Mon, 19 Nov 2018 10:47:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B8DC20831 for ; Mon, 19 Nov 2018 10:47:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="S564+S3E" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B8DC20831 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org 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 S1728131AbeKSVKq (ORCPT ); Mon, 19 Nov 2018 16:10:46 -0500 Received: from merlin.infradead.org ([205.233.59.134]:52514 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727767AbeKSVKp (ORCPT ); Mon, 19 Nov 2018 16:10:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=tPtCZHnRBM0k0RLO0taRjNjncWiK/BYB35pPtFfNv3Q=; b=S564+S3EEE26/UbSEUkra6J4U O9e9+gNGb5oldBgG0h0cMx/YldYZp6oPlvqQl3BhaCf/rIkmP5XYoOZpKxFoWyCAxmeMI5QI13ba+ hAmBDDSNdSfJi85LaSIjuoOCl72vYxVB5ukgpcEQimTNsMUc0igJ7Inj3som8W1YrvoNPDxZwnUW/ iWtymfanJc72A2fijzDQmh/+sFD22X5DIU3hP86K6pxqr0Dal1geLyDXXRLlvkzvhiDCIVB62++Le PydDtL0xv0jLtMOtodHwQkKU5Rx1O+5SPFdu1hKtt9waSH1wyHYr+EXAX7e4fVwZYUo/6URBOESrf 1ih9FkW3A==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gOh4q-0006pv-Fe; Mon, 19 Nov 2018 10:46:48 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 0B7622029F883; Mon, 19 Nov 2018 11:46:46 +0100 (CET) Date: Mon, 19 Nov 2018 11:46:46 +0100 From: Peter Zijlstra To: Jordan Glover Cc: Alexey Budankov , Thomas Gleixner , Kees Cook , Jann Horn , Ingo Molnar , Arnaldo Carvalho de Melo , Andi Kleen , Jonatan Corbet , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Mark Rutland , Tvrtko Ursulin , linux-kernel , "kernel-hardening@lists.openwall.com" , "linux-doc@vger.kernel.org" Subject: Re: [PATCH v1 2/2]: Documentation/admin-guide: introduce perf-security.rst file Message-ID: <20181119104646.GB9761@hirez.programming.kicks-ass.net> References: <0ac97cd0-4773-fff6-7d4e-74c4a1f076c4@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 19, 2018 at 10:35:59AM +0000, Jordan Glover wrote: > On Monday, November 19, 2018 6:42 AM, Alexey Budankov wrote: > > +>=3: > > > > - Restrict *access* to PCL performance monitoring for unprivileged processes. > > > > > > - This is the default on Debian and Android [7]_ , [8]_ . > > AFAIK there is no support for '+>=3' in mainline kernel[1]. > Debian and Android use out-of-tree patch for that[2]. > Maybe someone should upstream it? NAK still stands on that. Alternative's have been proposed but so far nobody that cared seems to care enough to implement those.