From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.eu.citrix.com ([185.25.65.24]:12720 "EHLO SMTP.EU.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751427AbdFZNY6 (ORCPT ); Mon, 26 Jun 2017 09:24:58 -0400 From: Paul Durrant To: =?utf-8?B?J01hcmVrIE1hcmN6eWtvd3NraS1Hw7NyZWNraSc=?= CC: =?utf-8?B?SnVlcmdlbiBHcm/Dnw==?= , Andrew Cooper , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" , "xen-devel@lists.xenproject.org" , "Boris Ostrovsky" Subject: RE: [Xen-devel] [PATCH] x86/xen: allow userspace access during hypercalls Date: Mon, 26 Jun 2017 13:24:55 +0000 Message-ID: <6a2c9fea81ef4e4ba7d533dba604223b@AMSPEX02CL03.citrite.net> References: <1498222072-18217-1-git-send-email-marmarek@invisiblethingslab.com> <6f8113d8-10a2-b23f-16c1-8b97b2fba0bb@suse.com> <20170626124505.GV1268@mail-itl> <2a846dd6006c46819c563113b6255d85@AMSPEX02CL03.citrite.net> <20170626132157.GW1268@mail-itl> In-Reply-To: <20170626132157.GW1268@mail-itl> Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KPiBGcm9tOiAnTWFyZWsgTWFyY3p5a293c2tp LUfDs3JlY2tpJw0KPiBbbWFpbHRvOm1hcm1hcmVrQGludmlzaWJsZXRoaW5nc2xhYi5jb21dDQo+ IFNlbnQ6IDI2IEp1bmUgMjAxNyAxNDoyMg0KPiBUbzogUGF1bCBEdXJyYW50IDxQYXVsLkR1cnJh bnRAY2l0cml4LmNvbT4NCj4gQ2M6IEp1ZXJnZW4gR3Jvw58gPGpncm9zc0BzdXNlLmNvbT47IEFu ZHJldyBDb29wZXINCj4gPEFuZHJldy5Db29wZXIzQGNpdHJpeC5jb20+OyB4ODZAa2VybmVsLm9y ZzsgbGludXgtDQo+IGtlcm5lbEB2Z2VyLmtlcm5lbC5vcmc7IHN0YWJsZUB2Z2VyLmtlcm5lbC5v cmc7IHhlbi0NCj4gZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmc7IEJvcmlzIE9zdHJvdnNreSA8 Ym9yaXMub3N0cm92c2t5QG9yYWNsZS5jb20+DQo+IFN1YmplY3Q6IFJlOiBbWGVuLWRldmVsXSBb UEFUQ0hdIHg4Ni94ZW46IGFsbG93IHVzZXJzcGFjZSBhY2Nlc3MgZHVyaW5nDQo+IGh5cGVyY2Fs bHMNCj4gDQo+IE9uIE1vbiwgSnVuIDI2LCAyMDE3IGF0IDAxOjA5OjU4UE0gKzAwMDAsIFBhdWwg RHVycmFudCB3cm90ZToNCj4gPiA+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+ID4gPiBG cm9tOiBYZW4tZGV2ZWwgW21haWx0bzp4ZW4tZGV2ZWwtYm91bmNlc0BsaXN0cy54ZW4ub3JnXSBP biBCZWhhbGYgT2YNCj4gPiA+IE1hcmVrIE1hcmN6eWtvd3NraS1Hw7NyZWNraQ0KPiA+ID4gU2Vu dDogMjYgSnVuZSAyMDE3IDEzOjQ1DQo+ID4gPiBUbzogSnVlcmdlbiBHcm/DnyA8amdyb3NzQHN1 c2UuY29tPg0KPiA+ID4gQ2M6IEFuZHJldyBDb29wZXIgPEFuZHJldy5Db29wZXIzQGNpdHJpeC5j b20+OyB4ODZAa2VybmVsLm9yZzsNCj4gbGludXgtDQo+ID4gPiBrZXJuZWxAdmdlci5rZXJuZWwu b3JnOyBzdGFibGVAdmdlci5rZXJuZWwub3JnOyB4ZW4tDQo+ID4gPiBkZXZlbEBsaXN0cy54ZW5w cm9qZWN0Lm9yZzsgQm9yaXMgT3N0cm92c2t5DQo+IDxib3Jpcy5vc3Ryb3Zza3lAb3JhY2xlLmNv bT4NCj4gPiA+IFN1YmplY3Q6IFJlOiBbWGVuLWRldmVsXSBbUEFUQ0hdIHg4Ni94ZW46IGFsbG93 IHVzZXJzcGFjZSBhY2Nlc3MgZHVyaW5nDQo+ID4gPiBoeXBlcmNhbGxzDQo+ID4gPg0KPiA+ID4g T24gTW9uLCBKdW4gMjYsIDIwMTcgYXQgMDI6MDU6NDhQTSArMDIwMCwgSnVlcmdlbiBHcm/DnyB3 cm90ZToNCj4gPiA+ID4gT24gMDYvMjMvMjAxNyAwMjo0NyBQTSwgTWFyZWsgTWFyY3p5a293c2tp LUfDs3JlY2tpIHdyb3RlOg0KPiA+ID4gPiA+IFVzZXJzcGFjZSBhcHBsaWNhdGlvbiBjYW4gZG8g YSBoeXBlcmNhbGwgdGhyb3VnaCAvZGV2L3hlbi9wcml2Y21kLA0KPiBhbmQNCj4gPiA+ID4gPiBz b21lIGZvciBzb21lIGh5cGVyY2FsbHMgYXJndW1lbnQgaXMgYSBwb2ludGVycyB0byB1c2VyLXBy b3ZpZGVkDQo+ID4gPiA+ID4gc3RydWN0dXJlLiBXaGVuIFNNQVAgaXMgc3VwcG9ydGVkIGFuZCBl bmFibGVkLCBoeXBlcnZpc29yIGNhbid0DQo+IGFjY2Vzcy4NCj4gPiA+ID4gPiBTbywgbGV0cyBh bGxvdyBpdC4NCj4gPiA+ID4NCj4gPiA+ID4gV2hhdCBhYm91dCBIWVBFUlZJU09SX2RtX29wPw0K PiA+ID4NCj4gPiA+IEluZGVlZCwgYXJndW1lbnRzIGNvcGllZCB0byBrZXJuZWwgc3BhY2UgdGhl cmUgYXJlIG9ubHkgYWRkcmVzc2VzIG9mDQo+ID4gPiBidWZmZXJzLiBXaWxsIHNlbmQgdjIgaW4g YSBtb21lbnQuDQo+ID4gPiBCdXQgSSBjYW4ndCB0ZXN0IGl0IHJpZ2h0IG5vdywgYXMgZm9yIG15 IHVuZGVyc3RhbmRpbmcgdGhpcyByZXF1aXJlDQo+ID4gPiBIVk0vUFZIdjIgZG9tMCBvciBzdHVi ZG9tYWluLi4uDQo+ID4gPg0KPiA+DQo+ID4gTm8sIHlvdSBkb24ndCBuZWVkIGFueXRoaW5nIHBh cnRpY3VsYXJseSBzcGVjaWFsIHRvIHVzZSBkbV9vcC4gSnVzdCB1cC10by0NCj4gZGF0ZSB4ZW4s IHByaXZjbWQsIGFuZCBRRU1VLiBRRU1VIHNob3VsZCBlbmQgdXAgdXNpbmcgZG1fb3AgYnkgZGVm YXVsdA0KPiBpZiBhbGwgdGhyZWUgYXJlIGluIHBsYWNlLg0KPiANCj4gQnV0IHRoZSBpc3N1ZSB0 aGlzIHBhdGNoIGZpeGVzIGFwcGxpZXMgb25seSB0byBoeXBlcmNhbGxzIGlzc3VlZCBmcm9tIEhW TS4NCg0KT2gsIEkgc2VlIHdoYXQgeW91IG1lYW4uIFdlbGwgSSBndWVzcyB5b3UgY291bGQgbWFu dWFsbHkgcnVuIFFFTVUgZnJvbSBhbiBIVk0gZG9tYWluLCBidXQgaXQgd291bGQgYmUgYSBiaXQg b2YgYSBmYWZmIHRvIHNldCB1cC4NCg0KICBQYXVsDQoNCj4gDQo+IC0tDQo+IEJlc3QgUmVnYXJk cywNCj4gTWFyZWsgTWFyY3p5a293c2tpLUfDs3JlY2tpDQo+IEludmlzaWJsZSBUaGluZ3MgTGFi DQo+IEE6IEJlY2F1c2UgaXQgbWVzc2VzIHVwIHRoZSBvcmRlciBpbiB3aGljaCBwZW9wbGUgbm9y bWFsbHkgcmVhZCB0ZXh0Lg0KPiBROiBXaHkgaXMgdG9wLXBvc3Rpbmcgc3VjaCBhIGJhZCB0aGlu Zz8NCg==