From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH] x86/EPT: defer enabling of A/D maintenance until PML get enabled Date: Tue, 29 Sep 2015 13:51:21 +0100 Message-ID: <560A8949.7010304@citrix.com> References: <56096DE002000078000A63EE@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ZguNl-0003iq-DA for xen-devel@lists.xenproject.org; Tue, 29 Sep 2015 12:51:45 +0000 In-Reply-To: <56096DE002000078000A63EE@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Jan Beulich , xen-devel Cc: Kai Huang , Kevin Tian , Jun Nakajima List-Id: xen-devel@lists.xenproject.org On 28/09/15 15:42, Jan Beulich wrote: > There's no point in enabling the extra feature for every domain when > we're not meaning to use it (yet). Just setting the flag should be > sufficient - the domain is required to be paused for PML enabling > anyway, i.e. hardware will pick up the new setting the next time > each vCPU of the guest gets scheduled. > > Signed-off-by: Jan Beulich > Cc: Kai Huang Reviewed-by: Andrew Cooper