From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aravind Gopalakrishnan Subject: Re: [PATCH] x86emul: support clzero Date: Mon, 11 Jan 2016 09:55:18 -0600 Message-ID: <5693D066.6070607@amd.com> References: <56016E8102000078000A45B7@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIeoZ-0002bT-Dr for xen-devel@lists.xenproject.org; Mon, 11 Jan 2016 15:55:27 +0000 In-Reply-To: <56016E8102000078000A45B7@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: Andrew Cooper , Keir Fraser , suravee.suthikulpanit@amd.com List-Id: xen-devel@lists.xenproject.org On 9/22/2015 8:06 AM, Jan Beulich wrote: > ... in anticipation of this possibly going to get used by guests for > basic thinks like memset() or clearing or pages. > > Since the emulation doesn't use clzero itself, checking the guest's > CPUID for the feature to be exposed is (intentionally) being avoided > here. All that's required is sensible guest side data for the clflush > line size. > > Signed-off-by: Jan Beulich > > Reviewed-by: Aravind Gopalakrishnan Thanks, -Aravind.