From owner-freebsd-questions@freebsd.org Wed Nov 18 08:33:00 2015 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1ABA3A2F3D7 for ; Wed, 18 Nov 2015 08:33:00 +0000 (UTC) (envelope-from ml@netfence.it) Received: from smtp208.alice.it (smtp208.alice.it [82.57.200.104]) by mx1.freebsd.org (Postfix) with ESMTP id A0D551FF9 for ; Wed, 18 Nov 2015 08:32:59 +0000 (UTC) (envelope-from ml@netfence.it) Received: from soth.ventu (79.32.6.132) by smtp208.alice.it (8.6.060.28) (authenticated as acanedi@alice.it) id 5638921C02934EC6 for freebsd-questions@freebsd.org; Wed, 18 Nov 2015 09:27:33 +0100 Received: from alamar.ventu (alamar.ventu [10.1.2.18]) by soth.ventu (8.15.2/8.14.9) with ESMTP id tAI8RW6O069637 for ; Wed, 18 Nov 2015 09:27:32 +0100 (CET) (envelope-from ml@netfence.it) Subject: Re: Is processor microcode advised? To: freebsd-questions@freebsd.org References: <564B3E4D.7070808@gmail.com> From: Andrea Venturoli Message-ID: <564C3674.8040803@netfence.it> Date: Wed, 18 Nov 2015 09:27:32 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD i386; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Nov 2015 08:33:00 -0000 On 11/17/15 16:10, Adam Vande More wrote: > On Tue, Nov 17, 2015 at 8:48 AM, Will Senn wrote: > >> Is it important/necessary/advisable to install microcode for Intel CPU's? >> If so, how do you know which CPU's have updates? Also, after doing make >> install in /usr/ports/sysutils/devcpu-data and adding >> microcode_update_enable="YES" to rc.conf, how can you tell if anything was >> applied - what do you look for in dmesg output >> > > man cpuctl > > But normally this is just handled with a bios update. Supposing BIOS has not been updated (due to no availability, lazyness, impossibility over a remote link, fear of bricking the box, etc...), the original question would still stand: is it important/necessary/advisable to use devcpu-data? Also, I see microcode_update has to load the cpuctl module. What are the implications of this WRT security? Would it be advisable to unload it afterwards? bye & Thanks av.