From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: Guest handling of IA32_DEBUGCTL MSR Date: Tue, 28 Apr 2015 13:43:29 +0200 Message-ID: <553F7261.40500@redhat.com> References: <07377BC4-FD59-4A2E-9FA8-28ABE1B7F6D2@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit To: Nadav Amit , kvm list Return-path: Received: from mx1.redhat.com ([209.132.183.28]:56215 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964975AbbD1Lni (ORCPT ); Tue, 28 Apr 2015 07:43:38 -0400 In-Reply-To: <07377BC4-FD59-4A2E-9FA8-28ABE1B7F6D2@gmail.com> Sender: kvm-owner@vger.kernel.org List-ID: On 28/04/2015 13:42, Nadav Amit wrote: > It seems strange that the guest is allowed to set IA32_DEBUGCTL MSR for the > nested VM and get this value to the physical IA32_DEBUGCTL (see > prepare_vmcs02), while it cannot set IA32_DEBUGCTL for itself (see > kvm_set_msr_common). > > Am I missing something? No, it makes no sense. Paolo