From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Wu, Feng" Subject: Re: Ping: [PATCH v3 2/4] x86: suppress SMEP and SMAP while running 32-bit PV guest code Date: Wed, 4 May 2016 03:07:11 +0000 Message-ID: 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.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1axn9i-00034X-Jb for xen-devel@lists.xenproject.org; Wed, 04 May 2016 03:07:18 +0000 In-Reply-To: <5728CAC202000078000E80D8@prv-mh.provo.novell.com> Content-Language: en-US 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 , Andrew Cooper , Ian Jackson , Tim Deegan , xen-devel , "Wu, Feng" List-Id: xen-devel@lists.xenproject.org Cgo+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tCj4gRnJvbTogSmFuIEJldWxpY2ggW21haWx0 bzpKQmV1bGljaEBzdXNlLmNvbV0KPiBTZW50OiBUdWVzZGF5LCBNYXkgMywgMjAxNiA5OjU5IFBN Cj4gQ2M6IEFuZHJldyBDb29wZXIgPGFuZHJldy5jb29wZXIzQGNpdHJpeC5jb20+OyBXZWkgTGl1 Cj4gPHdlaS5saXUyQGNpdHJpeC5jb20+OyBHZW9yZ2UgRHVubGFwIDxHZW9yZ2UuRHVubGFwQGV1 LmNpdHJpeC5jb20+OyBJYW4KPiBKYWNrc29uIDxJYW4uSmFja3NvbkBldS5jaXRyaXguY29tPjsg V3UsIEZlbmcgPGZlbmcud3VAaW50ZWwuY29tPjsgU3RlZmFubwo+IFN0YWJlbGxpbmkgPHNzdGFi ZWxsaW5pQGtlcm5lbC5vcmc+OyB4ZW4tZGV2ZWwgPHhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0 Lm9yZz47Cj4gS29ucmFkIFJ6ZXN6dXRlayBXaWxrIDxrb25yYWQud2lsa0BvcmFjbGUuY29tPjsg VGltIERlZWdhbiA8dGltQHhlbi5vcmc+Cj4gU3ViamVjdDogUGluZzogW1BBVENIIHYzIDIvNF0g eDg2OiBzdXBwcmVzcyBTTUVQIGFuZCBTTUFQIHdoaWxlIHJ1bm5pbmcgMzItYml0Cj4gUFYgZ3Vl c3QgY29kZQo+IAo+ID4+PiBPbiAxNy4wMy4xNiBhdCAwOTowMywgIHdyb3RlOgo+ID4gU2luY2Ug c3VjaCBndWVzdHMnIGtlcm5lbCBjb2RlIHJ1bnMgaW4gcmluZyAxLCB0aGVpciBtZW1vcnkgYWNj ZXNzZXMsCj4gPiBhdCB0aGUgcGFnaW5nIGxheWVyLCBhcmUgc3VwZXJ2aXNvciBtb2RlIG9uZXMs IGFuZCBoZW5jZSBzdWJqZWN0IHRvCj4gPiBTTUFQL1NNRVAgY2hlY2tzLiBTdWNoIGd1ZXN0cyBj YW5ub3QgYmUgZXhwZWN0ZWQgdG8gYmUgYXdhcmUgb2YgdGhvc2UKPiA+IHR3byBmZWF0dXJlcyB0 aG91Z2ggKGFuZCBzbyBmYXIgd2UgYWxzbyBkb24ndCBleHBvc2UgdGhlIHJlc3BlY3RpdmUKPiA+ IGZlYXR1cmUgZmxhZ3MpLCBhbmQgaGVuY2UgbWF5IHN1ZmZlciBwYWdlIGZhdWx0cyB0aGV5IGNh bm5vdCBkZWFsIHdpdGguCj4gPgo+ID4gV2hpbGUgdGhlIHBsYWNlbWVudCBvZiB0aGUgcmUtZW5h Ymxpbmcgc2xpZ2h0bHkgd2Vha2VucyB0aGUgaW50ZW5kZWQKPiA+IHByb3RlY3Rpb24sIGl0IHdh cyBzZWxlY3RlZCBzdWNoIHRoYXQgNjQtYml0IHBhdGhzIHdvdWxkIHJlbWFpbgo+ID4gdW5hZmZl Y3RlZCB3aGVyZSBwb3NzaWJsZS4gQXQgdGhlIGV4cGVuc2Ugb2YgYSBmdXJ0aGVyIHBlcmZvcm1h bmNlIGhpdAo+ID4gdGhlIHJlLWVuYWJsaW5nIGNvdWxkIGJlIHB1dCByaWdodCBuZXh0IHRvIHRo ZSBDTEFDcy4KPiA+Cj4gPiBOb3RlIHRoYXQgdGhpcyBpbnRyb2R1Y2VzIGEgbnVtYmVyIG9mIGV4 dHJhIFRMQiBmbHVzaGVzIC0gQ1I0LlNNRVAKPiA+IHRyYW5zaXRpb25pbmcgZnJvbSAwIHRvIDEg YWx3YXlzIGNhdXNlcyBhIGZsdXNoLCBhbmQgaXQgdHJhbnNpdGlvbmluZwo+ID4gZnJvbSAxIHRv IDAgbWF5IGFsc28gZG8uCj4gPgo+ID4gU2lnbmVkLW9mZi1ieTogSmFuIEJldWxpY2ggPGpiZXVs aWNoQHN1c2UuY29tPgo+IAo+IFNvIEkgdGhpbmsgd2UgbmVlZCB0byB0YWtlIHNvbWUgZGVjaXNp b24gaGVyZSwgYW5kIEknbSBhZnJhaWQKPiBBbmRyZXcgYW5kIEkgd29uJ3QgYmUgYWJsZSB0byBz ZXR0bGUgdGhpcyBiZXR3ZWVuIHVzLiBIZSdzCj4gdmFsaWRseSBjb25jZXJuZWQgYWJvdXQgdGhl IHBlcmZvcm1hbmNlIGltcGFjdCB0aGlzIGdvdCBwcm92ZW4KPiB0byBoYXZlIChmb3IgMzItYml0 IFBWIGd1ZXN0cyksIHlldCBJIGNvbnRpbnVlIHRvIHRoaW5rIHRoYXQgY29ycmVjdAo+IGJlaGF2 aW9yIGlzIG1vcmUgcmVsZXZhbnQgdGhhbiBwZXJmb3JtYW5jZS4gSGVuY2UgSSB0aGluayB3ZQo+ IHNob3VsZCBiaXRlIHRoZSBidWxsZXQgYW5kIHRha2UgdGhlIGNoYW5nZS4gRm9yIHRob3NlIHdo byB2YWx1ZQo+IHBlcmZvcm1hbmNlIG1vcmUgdGhhbiBzZWN1cml0eSwgdGhleSBjYW4gYWx3YXlz IGRpc2FibGUgdGhlIHVzZQo+IG9mIFNNRVAgYW5kIFNNQVAgdmlhIGNvbW1hbmQgbGluZSBvcHRp b24uCgpJIHRoaW5rIHRoaXMgaXMgYSBwcm9wZXIgc29sdXRpb24gZm9yIHRob3NlIHdobyBjYXJl cyBtb3JlIGFib3V0CnBlcmZvcm1hbmNlLiBBbmQgQlRXLCBBbmRyZXcsIGlzIHRoZXJlIGFueSBk ZXRhaWxlZCBkYXRhIHdoaWNoIGNhbgpzaG93IHRoZSBleGFjdCBwZXJmb3JtYW5jZSBvdmVyaGVh ZCBpbnRyb2R1Y2VkIGJ5IHRoaXMgcGF0Y2g/CgpUaGFua3MsCkZlbmcKCj4gCj4gT2YgY291cnNl IEknbSBhbHNvIGNvbmNlcm5lZCB0aGF0IEludGVsLCB3aG8gZGlkIGludHJvZHVjZSB0aGUKPiBm dW5jdGlvbmFsIHJlZ3Jlc3Npb24gaW4gdGhlIGZpcnN0IHBsYWNlLCBzbyBmYXIgZGlkbid0IHBh cnRpY2lwYXRlIGF0Cj4gYWxsIGluIGZpbmRpbmcgYW4gYWNjZXB0YWJsZSBzb2x1dGlvbiB0byB0 aGUgcHJvYmxlbSBhdCBoYW5kLi4uCj4gCj4gSmFuCgoKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxA bGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK