From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH v3 2/4] x86: suppress SMEP and SMAP while running 32-bit PV guest code Date: Fri, 13 May 2016 16:58:33 +0100 Message-ID: <5735F9A9.8020109@citrix.com> References: <56D97AC102000078000D9537@prv-mh.provo.novell.com> <56E14FF502000078000DB232@prv-mh.provo.novell.com> <56E9A0DB02000078000DD54C@prv-mh.provo.novell.com> <56EA6FDF02000078000DD8FB@prv-mh.provo.novell.com> <56EA6FDF02000078000DD8FB@prv-mh.provo.novell.com> <56EA72C402000078000DD92F@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1b1FUe-0008Rb-Us for xen-devel@lists.xenproject.org; Fri, 13 May 2016 15:59:13 +0000 In-Reply-To: <56EA72C402000078000DD92F@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich , xen-devel Cc: Keir Fraser , Feng Wu List-Id: xen-devel@lists.xenproject.org T24gMTcvMDMvMTYgMDg6MDMsIEphbiBCZXVsaWNoIHdyb3RlOgo+IFNpbmNlIHN1Y2ggZ3Vlc3Rz JyBrZXJuZWwgY29kZSBydW5zIGluIHJpbmcgMSwgdGhlaXIgbWVtb3J5IGFjY2Vzc2VzLAo+IGF0 IHRoZSBwYWdpbmcgbGF5ZXIsIGFyZSBzdXBlcnZpc29yIG1vZGUgb25lcywgYW5kIGhlbmNlIHN1 YmplY3QgdG8KPiBTTUFQL1NNRVAgY2hlY2tzLiBTdWNoIGd1ZXN0cyBjYW5ub3QgYmUgZXhwZWN0 ZWQgdG8gYmUgYXdhcmUgb2YgdGhvc2UKPiB0d28gZmVhdHVyZXMgdGhvdWdoIChhbmQgc28gZmFy IHdlIGFsc28gZG9uJ3QgZXhwb3NlIHRoZSByZXNwZWN0aXZlCj4gZmVhdHVyZSBmbGFncyksIGFu ZCBoZW5jZSBtYXkgc3VmZmVyIHBhZ2UgZmF1bHRzIHRoZXkgY2Fubm90IGRlYWwgd2l0aC4KPgo+ IFdoaWxlIHRoZSBwbGFjZW1lbnQgb2YgdGhlIHJlLWVuYWJsaW5nIHNsaWdodGx5IHdlYWtlbnMg dGhlIGludGVuZGVkCj4gcHJvdGVjdGlvbiwgaXQgd2FzIHNlbGVjdGVkIHN1Y2ggdGhhdCA2NC1i aXQgcGF0aHMgd291bGQgcmVtYWluCj4gdW5hZmZlY3RlZCB3aGVyZSBwb3NzaWJsZS4gQXQgdGhl IGV4cGVuc2Ugb2YgYSBmdXJ0aGVyIHBlcmZvcm1hbmNlIGhpdAo+IHRoZSByZS1lbmFibGluZyBj b3VsZCBiZSBwdXQgcmlnaHQgbmV4dCB0byB0aGUgQ0xBQ3MuCj4KPiBOb3RlIHRoYXQgdGhpcyBp bnRyb2R1Y2VzIGEgbnVtYmVyIG9mIGV4dHJhIFRMQiBmbHVzaGVzIC0gQ1I0LlNNRVAKPiB0cmFu c2l0aW9uaW5nIGZyb20gMCB0byAxIGFsd2F5cyBjYXVzZXMgYSBmbHVzaCwgYW5kIGl0IHRyYW5z aXRpb25pbmcKPiBmcm9tIDEgdG8gMCBtYXkgYWxzbyBkby4KPgo+IFNpZ25lZC1vZmYtYnk6IEph biBCZXVsaWNoIDxqYmV1bGljaEBzdXNlLmNvbT4KClNvcnJ5IC0gSSByZXZpZXdlZCB0aGUgdjMg Y29kZSwgYW5kIHJlcGxpZWQgdG8gdGhlIHYyIGVtYWlsLgoKRm9yIGNsYXJpdHkgc2FrZSwgUmV2 aWV3ZWQtYnk6IEFuZHJldyBDb29wZXIgPGFuZHJldy5jb29wZXIzQGNpdHJpeC5jb20+CgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFp bGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHA6Ly9saXN0cy54ZW4ub3JnL3hl bi1kZXZlbAo=