From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [RFC PATCH 7/7] [hyper-v] init hyper-v cpuid leafs Date: Tue, 11 Oct 2011 17:52:25 +0200 Message-ID: <4E946639.9020001@redhat.com> References: <1318186375-27672-1-git-send-email-vrozenfe@redhat.com> <1318186375-27672-8-git-send-email-vrozenfe@redhat.com> <4E93F262.3070800@redhat.com> <1318340766.2706.59.camel@vadimr.dell> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, Avi Kivity To: Vadim Rozenfeld Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:58123 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754565Ab1JKPw2 (ORCPT ); Tue, 11 Oct 2011 11:52:28 -0400 Received: by wyg34 with SMTP id 34so7181606wyg.19 for ; Tue, 11 Oct 2011 08:52:27 -0700 (PDT) In-Reply-To: <1318340766.2706.59.camel@vadimr.dell> Sender: kvm-owner@vger.kernel.org List-ID: On 10/11/2011 03:46 PM, Vadim Rozenfeld wrote: > > These should not be KVM-specific. You should be able to add > > enlightenments to a TCG VM. At the same time, the KVM leaves could be > > moved to 0x40000100 when enlightenments are active, similar to what Xen > > does. > > > > IMO, adding Hyper-V features without KVM support has little, if any, > meaning. Relaxed timing is the only one thing, which can be activated > without help from hypervisor. Spinlocks too. TCG does its own round-robin scheduling, so having zero retries could be the best setting. But even if it is not useful for TCG, there's nothing KVM-specific, and that's the important point. Paolo