From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: [PATCH v3] X86/VMX: Disable VMX preemption timer if MWAIT is not intercepted Date: Tue, 10 Apr 2018 12:21:36 -0400 Message-ID: <20180410162136.GA6602@char.us.oracle.com> References: <1523362546-20909-1-git-send-email-karahmed@amazon.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini , Radim =?utf-8?B?S3LEjW3DocWZ?= , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , x86@kernel.org To: KarimAllah Ahmed Return-path: Content-Disposition: inline In-Reply-To: <1523362546-20909-1-git-send-email-karahmed@amazon.de> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Tue, Apr 10, 2018 at 02:15:46PM +0200, KarimAllah Ahmed wrote: > The VMX-preemption timer is used by KVM as a way to set deadlines for the > guest (i.e. timer emulation). That was safe till very recently when > capability KVM_X86_DISABLE_EXITS_MWAIT to disable intercepting MWAIT was > introduced. According to Intel SDM 25.5.1: Would it make sense to remove the '25.5.1' and just have the chapter name, etc as those do move around?