From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Sat, 04 Oct 2014 10:23:22 +0200 (CEST) Received: from casper.infradead.org ([85.118.1.10]:34618 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S27009691AbaJDIXUJRYLM (ORCPT ); Sat, 4 Oct 2014 10:23:20 +0200 Received: from 178-85-85-44.dynamic.upc.nl ([178.85.85.44] helo=worktop) by casper.infradead.org with esmtpsa (Exim 4.80.1 #2 (Red Hat Linux)) id 1XaKcO-000494-DW; Sat, 04 Oct 2014 08:23:08 +0000 Received: by worktop (Postfix, from userid 1000) id 633626E0B71; Sat, 4 Oct 2014 10:23:07 +0200 (CEST) Date: Sat, 4 Oct 2014 10:23:07 +0200 From: Peter Zijlstra To: Leonid Yegoshin Cc: linux-mips@linux-mips.org, Zubair.Kakakhel@imgtec.com, david.daney@cavium.com, paul.gortmaker@windriver.com, davidlohr@hp.com, macro@linux-mips.org, chenhc@lemote.com, zajec5@gmail.com, james.hogan@imgtec.com, keescook@chromium.org, alex@alex-smith.me.uk, tglx@linutronix.de, blogic@openwrt.org, jchandra@broadcom.com, paul.burton@imgtec.com, qais.yousef@imgtec.com, linux-kernel@vger.kernel.org, ralf@linux-mips.org, markos.chandras@imgtec.com, manuel.lauss@gmail.com, akpm@linux-foundation.org, lars.persson@axis.com Subject: Re: [PATCH 0/3] MIPS executable stack protection Message-ID: <20141004082307.GS10583@worktop.programming.kicks-ass.net> References: <20141004030438.28569.85536.stgit@linux-yegoshin> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141004030438.28569.85536.stgit@linux-yegoshin> User-Agent: Mutt/1.5.22.1 (2013-10-16) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 42952 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: peterz@infradead.org Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips On Fri, Oct 03, 2014 at 08:17:14PM -0700, Leonid Yegoshin wrote: > The following series implements an executable stack protection in MIPS. > > It sets up a per-thread 'VDSO' page and appropriate TLB support. So traditionally we've always avoided per-thread pages like that. What makes it worth it on MIPS?