From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linutronix.de (146.0.238.70:993) by crypto-ml.lab.linutronix.de with IMAP4-SSL for ; 13 Dec 2018 20:57:01 -0000 Received: from mail-lf1-x142.google.com ([2a00:1450:4864:20::142]) by Galois.linutronix.de with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1gXY2W-0007cC-0j for speck@linutronix.de; Thu, 13 Dec 2018 21:57:00 +0100 Received: by mail-lf1-x142.google.com with SMTP id v5so2632688lfe.7 for ; Thu, 13 Dec 2018 12:57:00 -0800 (PST) Received: from mail-lf1-f52.google.com (mail-lf1-f52.google.com. [209.85.167.52]) by smtp.gmail.com with ESMTPSA id o25sm509173lfd.29.2018.12.13.12.56.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 13 Dec 2018 12:56:52 -0800 (PST) Received: by mail-lf1-f52.google.com with SMTP id a16so2645597lfg.3 for ; Thu, 13 Dec 2018 12:56:52 -0800 (PST) MIME-Version: 1.0 References: <20181211000303.GB16024@tassilo.jf.intel.com> <20181211032503.GB25620@tassilo.jf.intel.com> <20181212175803.GF25620@tassilo.jf.intel.com> <20181213204828.GM25620@tassilo.jf.intel.com> In-Reply-To: <20181213204828.GM25620@tassilo.jf.intel.com> From: Linus Torvalds Date: Thu, 13 Dec 2018 12:56:36 -0800 Message-ID: Subject: [MODERATED] Re: [PATCH v2 3/8] MDSv2 5 Content-Type: text/plain; charset="UTF-8" To: speck@linutronix.de List-ID: On Thu, Dec 13, 2018 at 12:50 PM speck for Andi Kleen wrote: > > I don't think it has been worked out yet, but the reason > I added the software sequences is that some CPUs may not > be able to do the VERW in microcode updates. Yes. But it really sounded that nobody cared, and people actually argued against it (ei particularly the vmware case). Or rather, the people who cared were pushing for the micorocode updates to be extended back to Westmere Xeon, rather than use a sw sequence. Most people that run hardware that is basically 10+ years old by now won't be upgrading kernels _or_ microcode, so us worrying about them sounds pretty much pointless. Linus