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 ; 20 Feb 2019 16:48:19 -0000 Received: from mail.kernel.org ([198.145.29.99]) by Galois.linutronix.de with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1gwV2f-0000y1-Jq for speck@linutronix.de; Wed, 20 Feb 2019 17:48:18 +0100 Date: Wed, 20 Feb 2019 17:48:08 +0100 From: Greg KH Subject: [MODERATED] Re: [patch V2 02/10] MDS basics+ 2 Message-ID: <20190220164808.GB4648@kroah.com> References: <20190220150753.665964899@linutronix.de> <20190220151400.114717276@linutronix.de> MIME-Version: 1.0 In-Reply-To: <20190220151400.114717276@linutronix.de> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: speck@linutronix.de List-ID: On Wed, Feb 20, 2019 at 04:07:55PM +0100, speck for Thomas Gleixner wrote: > From: Andi Kleen > Subject: [patch V2 02/10] x86/kvm: Expose X86_FEATURE_MD_CLEAR to guests > > X86_FEATURE_MD_CLEAR is a new CPUID bit which is set when microcode > provides the mechanism to invoke a flush of various exploitable CPU buffers > by invoking the VERW instruction. > > Hand it through to guests so they can adjust their mitigations. > > This also requires corresponding qemu changes, which are available > seperately. "separately" :) Reviewed-by: Greg Kroah-Hartman