From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: Ping: [PATCH v3 2/4] x86: suppress SMEP and SMAP while running 32-bit PV guest code Date: Tue, 3 May 2016 15:10:20 +0100 Message-ID: <5728B14C.6010801@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> <5728CAC202000078000E80D8@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 1axb1s-0002ue-Dn for xen-devel@lists.xenproject.org; Tue, 03 May 2016 14:10:24 +0000 In-Reply-To: <5728CAC202000078000E80D8@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 Cc: Stefano Stabellini , Wei Liu , George Dunlap , Tim Deegan , Ian Jackson , xen-devel , Feng Wu List-Id: xen-devel@lists.xenproject.org T24gMDMvMDUvMTYgMTQ6NTgsIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+IE9uIDE3LjAzLjE2IGF0 IDA5OjAzLCAgd3JvdGU6Cj4+IFNpbmNlIHN1Y2ggZ3Vlc3RzJyBrZXJuZWwgY29kZSBydW5zIGlu IHJpbmcgMSwgdGhlaXIgbWVtb3J5IGFjY2Vzc2VzLAo+PiBhdCB0aGUgcGFnaW5nIGxheWVyLCBh cmUgc3VwZXJ2aXNvciBtb2RlIG9uZXMsIGFuZCBoZW5jZSBzdWJqZWN0IHRvCj4+IFNNQVAvU01F UCBjaGVja3MuIFN1Y2ggZ3Vlc3RzIGNhbm5vdCBiZSBleHBlY3RlZCB0byBiZSBhd2FyZSBvZiB0 aG9zZQo+PiB0d28gZmVhdHVyZXMgdGhvdWdoIChhbmQgc28gZmFyIHdlIGFsc28gZG9uJ3QgZXhw b3NlIHRoZSByZXNwZWN0aXZlCj4+IGZlYXR1cmUgZmxhZ3MpLCBhbmQgaGVuY2UgbWF5IHN1ZmZl ciBwYWdlIGZhdWx0cyB0aGV5IGNhbm5vdCBkZWFsIHdpdGguCj4+Cj4+IFdoaWxlIHRoZSBwbGFj ZW1lbnQgb2YgdGhlIHJlLWVuYWJsaW5nIHNsaWdodGx5IHdlYWtlbnMgdGhlIGludGVuZGVkCj4+ IHByb3RlY3Rpb24sIGl0IHdhcyBzZWxlY3RlZCBzdWNoIHRoYXQgNjQtYml0IHBhdGhzIHdvdWxk IHJlbWFpbgo+PiB1bmFmZmVjdGVkIHdoZXJlIHBvc3NpYmxlLiBBdCB0aGUgZXhwZW5zZSBvZiBh IGZ1cnRoZXIgcGVyZm9ybWFuY2UgaGl0Cj4+IHRoZSByZS1lbmFibGluZyBjb3VsZCBiZSBwdXQg cmlnaHQgbmV4dCB0byB0aGUgQ0xBQ3MuCj4+Cj4+IE5vdGUgdGhhdCB0aGlzIGludHJvZHVjZXMg YSBudW1iZXIgb2YgZXh0cmEgVExCIGZsdXNoZXMgLSBDUjQuU01FUAo+PiB0cmFuc2l0aW9uaW5n IGZyb20gMCB0byAxIGFsd2F5cyBjYXVzZXMgYSBmbHVzaCwgYW5kIGl0IHRyYW5zaXRpb25pbmcK Pj4gZnJvbSAxIHRvIDAgbWF5IGFsc28gZG8uCj4+Cj4+IFNpZ25lZC1vZmYtYnk6IEphbiBCZXVs aWNoIDxqYmV1bGljaEBzdXNlLmNvbT4KPiBTbyBJIHRoaW5rIHdlIG5lZWQgdG8gdGFrZSBzb21l IGRlY2lzaW9uIGhlcmUsIGFuZCBJJ20gYWZyYWlkCj4gQW5kcmV3IGFuZCBJIHdvbid0IGJlIGFi bGUgdG8gc2V0dGxlIHRoaXMgYmV0d2VlbiB1cy4gSGUncwo+IHZhbGlkbHkgY29uY2VybmVkIGFi b3V0IHRoZSBwZXJmb3JtYW5jZSBpbXBhY3QgdGhpcyBnb3QgcHJvdmVuCj4gdG8gaGF2ZSAoZm9y IDMyLWJpdCBQViBndWVzdHMpLCB5ZXQgSSBjb250aW51ZSB0byB0aGluayB0aGF0IGNvcnJlY3QK PiBiZWhhdmlvciBpcyBtb3JlIHJlbGV2YW50IHRoYW4gcGVyZm9ybWFuY2UuIEhlbmNlIEkgdGhp bmsgd2UKPiBzaG91bGQgYml0ZSB0aGUgYnVsbGV0IGFuZCB0YWtlIHRoZSBjaGFuZ2UuIEZvciB0 aG9zZSB3aG8gdmFsdWUKPiBwZXJmb3JtYW5jZSBtb3JlIHRoYW4gc2VjdXJpdHksIHRoZXkgY2Fu IGFsd2F5cyBkaXNhYmxlIHRoZSB1c2UKPiBvZiBTTUVQIGFuZCBTTUFQIHZpYSBjb21tYW5kIGxp bmUgb3B0aW9uLgo+Cj4gT2YgY291cnNlIEknbSBhbHNvIGNvbmNlcm5lZCB0aGF0IEludGVsLCB3 aG8gZGlkIGludHJvZHVjZSB0aGUKPiBmdW5jdGlvbmFsIHJlZ3Jlc3Npb24gaW4gdGhlIGZpcnN0 IHBsYWNlLCBzbyBmYXIgZGlkbid0IHBhcnRpY2lwYXRlIGF0Cj4gYWxsIGluIGZpbmRpbmcgYW4g YWNjZXB0YWJsZSBzb2x1dGlvbiB0byB0aGUgcHJvYmxlbSBhdCBoYW5kLi4uCgpXaGF0IEkgYW0g ZXZlbiBtb3JlIGNvbmNlcm5lZCB3aXRoIGlzIHRoYXQgdGhlIHN1cHBvc2VkbHktb3B0aW1pc2Vk CnZlcnNpb24gd2hpY2ggdHJpZWQgdG8gb21pdCBjcjQgd3JpdGVzIHdoZW5ldmVyIHBvc3NpYmxl IGNhdXNlZCBhIGhpZ2hlcgpwZXJmb3JtYW5jZSBvdmVyaGVhZCB0aGFuIHRoZSB2ZXJzaW9uIHdo aWNoIHJld3JpdGUgY3I0IGFsbCB0aGUgdGltZS4KCkFzIGlzIHN0YW5kcywgdjMgb2YgdGhlIHNl cmllcyBpcyBldmVuIHdvcnNlIGZvciBwZXJmb3JtYW5jZSB0aGFuIHYyLiAKVGhhdCBhbG9uZSBt ZWFucyB0aGF0IHYzIGlzIG5vdCBpbiBhIHN1aXRhYmxlIHN0YXRlIHRvIGJlIGFjY2VwdGVkLCBh cwp0aGVyZSBpcyBzb21lIGhpZGRlbiBidWcgaW4gaXQuCgp+QW5kcmV3CgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0 Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHA6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=