From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: Ping: [PATCH v3 2/4] x86: suppress SMEP and SMAP while running 32-bit PV guest code Date: Tue, 03 May 2016 08:25:09 -0600 Message-ID: <5728D0E502000078000E813C@prv-mh.provo.novell.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> <5728B14C.6010801@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1axbGF-00041I-Eg for xen-devel@lists.xenproject.org; Tue, 03 May 2016 14:25:15 +0000 In-Reply-To: <5728B14C.6010801@citrix.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Andrew Cooper Cc: Stefano Stabellini , Wei Liu , George Dunlap , Tim Deegan , IanJackson , xen-devel , Feng Wu List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDAzLjA1LjE2IGF0IDE2OjEwLCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3Jv dGU6Cj4gT24gMDMvMDUvMTYgMTQ6NTgsIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+PiBPbiAxNy4w My4xNiBhdCAwOTowMywgIHdyb3RlOgo+Pj4gU2luY2Ugc3VjaCBndWVzdHMnIGtlcm5lbCBjb2Rl IHJ1bnMgaW4gcmluZyAxLCB0aGVpciBtZW1vcnkgYWNjZXNzZXMsCj4+PiBhdCB0aGUgcGFnaW5n IGxheWVyLCBhcmUgc3VwZXJ2aXNvciBtb2RlIG9uZXMsIGFuZCBoZW5jZSBzdWJqZWN0IHRvCj4+ PiBTTUFQL1NNRVAgY2hlY2tzLiBTdWNoIGd1ZXN0cyBjYW5ub3QgYmUgZXhwZWN0ZWQgdG8gYmUg YXdhcmUgb2YgdGhvc2UKPj4+IHR3byBmZWF0dXJlcyB0aG91Z2ggKGFuZCBzbyBmYXIgd2UgYWxz byBkb24ndCBleHBvc2UgdGhlIHJlc3BlY3RpdmUKPj4+IGZlYXR1cmUgZmxhZ3MpLCBhbmQgaGVu Y2UgbWF5IHN1ZmZlciBwYWdlIGZhdWx0cyB0aGV5IGNhbm5vdCBkZWFsIHdpdGguCj4+Pgo+Pj4g V2hpbGUgdGhlIHBsYWNlbWVudCBvZiB0aGUgcmUtZW5hYmxpbmcgc2xpZ2h0bHkgd2Vha2VucyB0 aGUgaW50ZW5kZWQKPj4+IHByb3RlY3Rpb24sIGl0IHdhcyBzZWxlY3RlZCBzdWNoIHRoYXQgNjQt Yml0IHBhdGhzIHdvdWxkIHJlbWFpbgo+Pj4gdW5hZmZlY3RlZCB3aGVyZSBwb3NzaWJsZS4gQXQg dGhlIGV4cGVuc2Ugb2YgYSBmdXJ0aGVyIHBlcmZvcm1hbmNlIGhpdAo+Pj4gdGhlIHJlLWVuYWJs aW5nIGNvdWxkIGJlIHB1dCByaWdodCBuZXh0IHRvIHRoZSBDTEFDcy4KPj4+Cj4+PiBOb3RlIHRo YXQgdGhpcyBpbnRyb2R1Y2VzIGEgbnVtYmVyIG9mIGV4dHJhIFRMQiBmbHVzaGVzIC0gQ1I0LlNN RVAKPj4+IHRyYW5zaXRpb25pbmcgZnJvbSAwIHRvIDEgYWx3YXlzIGNhdXNlcyBhIGZsdXNoLCBh bmQgaXQgdHJhbnNpdGlvbmluZwo+Pj4gZnJvbSAxIHRvIDAgbWF5IGFsc28gZG8uCj4+Pgo+Pj4g U2lnbmVkLW9mZi1ieTogSmFuIEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgo+PiBTbyBJIHRo aW5rIHdlIG5lZWQgdG8gdGFrZSBzb21lIGRlY2lzaW9uIGhlcmUsIGFuZCBJJ20gYWZyYWlkCj4+ IEFuZHJldyBhbmQgSSB3b24ndCBiZSBhYmxlIHRvIHNldHRsZSB0aGlzIGJldHdlZW4gdXMuIEhl J3MKPj4gdmFsaWRseSBjb25jZXJuZWQgYWJvdXQgdGhlIHBlcmZvcm1hbmNlIGltcGFjdCB0aGlz IGdvdCBwcm92ZW4KPj4gdG8gaGF2ZSAoZm9yIDMyLWJpdCBQViBndWVzdHMpLCB5ZXQgSSBjb250 aW51ZSB0byB0aGluayB0aGF0IGNvcnJlY3QKPj4gYmVoYXZpb3IgaXMgbW9yZSByZWxldmFudCB0 aGFuIHBlcmZvcm1hbmNlLiBIZW5jZSBJIHRoaW5rIHdlCj4+IHNob3VsZCBiaXRlIHRoZSBidWxs ZXQgYW5kIHRha2UgdGhlIGNoYW5nZS4gRm9yIHRob3NlIHdobyB2YWx1ZQo+PiBwZXJmb3JtYW5j ZSBtb3JlIHRoYW4gc2VjdXJpdHksIHRoZXkgY2FuIGFsd2F5cyBkaXNhYmxlIHRoZSB1c2UKPj4g b2YgU01FUCBhbmQgU01BUCB2aWEgY29tbWFuZCBsaW5lIG9wdGlvbi4KPj4KPj4gT2YgY291cnNl IEknbSBhbHNvIGNvbmNlcm5lZCB0aGF0IEludGVsLCB3aG8gZGlkIGludHJvZHVjZSB0aGUKPj4g ZnVuY3Rpb25hbCByZWdyZXNzaW9uIGluIHRoZSBmaXJzdCBwbGFjZSwgc28gZmFyIGRpZG4ndCBw YXJ0aWNpcGF0ZSBhdAo+PiBhbGwgaW4gZmluZGluZyBhbiBhY2NlcHRhYmxlIHNvbHV0aW9uIHRv IHRoZSBwcm9ibGVtIGF0IGhhbmQuLi4KPiAKPiBXaGF0IEkgYW0gZXZlbiBtb3JlIGNvbmNlcm5l ZCB3aXRoIGlzIHRoYXQgdGhlIHN1cHBvc2VkbHktb3B0aW1pc2VkCj4gdmVyc2lvbiB3aGljaCB0 cmllZCB0byBvbWl0IGNyNCB3cml0ZXMgd2hlbmV2ZXIgcG9zc2libGUgY2F1c2VkIGEgaGlnaGVy Cj4gcGVyZm9ybWFuY2Ugb3ZlcmhlYWQgdGhhbiB0aGUgdmVyc2lvbiB3aGljaCByZXdyaXRlIGNy NCBhbGwgdGhlIHRpbWUuCj4gCj4gQXMgaXMgc3RhbmRzLCB2MyBvZiB0aGUgc2VyaWVzIGlzIGV2 ZW4gd29yc2UgZm9yIHBlcmZvcm1hbmNlIHRoYW4gdjIuIAo+IFRoYXQgYWxvbmUgbWVhbnMgdGhh dCB2MyBpcyBub3QgaW4gYSBzdWl0YWJsZSBzdGF0ZSB0byBiZSBhY2NlcHRlZCwgYXMKPiB0aGVy ZSBpcyBzb21lIGhpZGRlbiBidWcgaW4gaXQuCgpGb3Igb25lLCB3ZSBjb3VsZCB0YWtlIHYyIChh bGJlaXQgdGhhdCB3b3VsZCBmZWVsIG9kZCkuCgpBbmQgdGhlbiwgZnJvbSB2MyBzaG93aW5nIHdv cnNlIHBlcmZvcm1hbmNlICh3aGljaCBvbmx5IHlvdQpoYXZlIHNlZW4gdGhlIG51bWJlcnMgZm9y LCBhbmQgW2hvcGVmdWxseV0ga25vdyB3aGF0IGRldmlhdGlvbnMKaW4gdGhlbSByZWFsbHkgbWVh bikgaXQgZG9lcyBub3QgZm9sbG93IHRoYXQgdjMgaXMgYnVnZ3kuIFRoYXQncyBvbmUKcG9zc2li aWxpdHksIHN1cmUgKGFsYmVpdCBoYXJkIHRvIGV4cGxhaW4sIGFzIGZ1bmN0aW9uYWxseSBldmVy eXRoaW5nCmlzIHdvcmtpbmcgZmluZSBmb3IgYm90aCB5b3UgYW5kIG1lLCBhZmFpayksIGJ1dCBu b3QgdGhlIG9ubHkgb25lLgpBbm90aGVyIG1heSBiZSB0aGF0IGhhcmR3YXJlIHByb2Nlc3NlcyBD UjQgd3JpdGVzIGZhc3RlciB3aGVuCnRoZXkgaGFwcGVuIGluIGNsb3NlIHN1Y2Nlc3Npb24gdG8g Q1I0IHJlYWRzLiBBbmQgSSdtIHN1cmUgbW9yZQpjb3VsZCBiZSBjb21lIHVwIHdpdGguCgpBbmQg ZmluYWxseSwgSSdtIG5vdCB0aWVkIHRvIHRoaXMgcGF0Y2ggc2V0LiBJJ2QgYmUgZmluZSB3aXRo IHNvbWUKb3RoZXIgZml4IHRvIHJlc3RvcmUgY29ycmVjdCBiZWhhdmlvci4gV2hhdCBJJ20gbm90 IGZpbmUgd2l0aCBpcyB0aGUKbGltYm8gc3RhdGUgdGhpcyBpcyBiZWluZyBsZWZ0IGluLCB3aXRo IG1lIGFsbCB0aGUgdGltZSBoYXZpbmcgdG8gcmV2aXZlCnRoZSBkaXNjdXNzaW9uLgoKSmFuCgoK X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9y Zy94ZW4tZGV2ZWwK