From mboxrd@z Thu Jan 1 00:00:00 1970 From: Razvan Cojocaru Subject: Re: [PATCH v1] x86/hvm: Generic instruction re-execution mechanism for execute faults Date: Thu, 22 Nov 2018 20:24:52 +0200 Message-ID: References: <20181116170412.xrwuun3cqxll22l3@mac> <20181122100554.pyqqa5iw6g27erkv@mac> <7efdfb5e-044b-f2a3-6562-d3468997096a@bitdefender.com> <20181122105821.6ihjcq5dy2lqjj6j@mac> <98f57a8a-288d-45ec-ef01-889fce63eeff@bitdefender.com> <20181122144924.ffy6xxwqugoj24nj@mac> <20181122153756.au3ntxgfqjjhd6sb@mac> <20181122170801.pzdoif2g73aamnmu@mac> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gPtev-0008N6-3w for xen-devel@lists.xenproject.org; Thu, 22 Nov 2018 18:25:01 +0000 In-Reply-To: <20181122170801.pzdoif2g73aamnmu@mac> Content-Language: en-US-large List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Cc: "kevin.tian@intel.com" , "tamas@tklengyel.com" , "wei.liu2@citrix.com" , "jbeulich@suse.com" , "george.dunlap@eu.citrix.com" , "andrew.cooper3@citrix.com" , =?UTF-8?Q?Mihai_Don=c8=9bu?= , Andrei Vlad LUTAS , "jun.nakajima@intel.com" , Alexandru Stefan ISAILA , "xen-devel@lists.xenproject.org" , Anshul Makkar List-Id: xen-devel@lists.xenproject.org T24gMTEvMjIvMTggNzowOCBQTSwgUm9nZXIgUGF1IE1vbm7DqSB3cm90ZToKPiBPbiBUaHUsIE5v diAyMiwgMjAxOCBhdCAwNjo1MjowN1BNICswMjAwLCBSYXp2YW4gQ29qb2NhcnUgd3JvdGU6Cj4+ IE9uIDExLzIyLzE4IDU6MzcgUE0sIFJvZ2VyIFBhdSBNb25uw6kgd3JvdGU6Cj4+PiBJIGRvbid0 IHRoaW5rIHlvdSBhcmUgc3VwcG9zZWQgdG8gdHJ5IHRvIHBhdXNlIG90aGVyIHZjcHVzIHdoaWxl Cj4+PiBob2xkaW5nIGEgbG9jaywgYXMgeW91IGNhbiBzZWUgaXQncyBxdWl0ZSBsaWtlbHkgdGhh dCB5b3Ugd2lsbCBlbmQgdXAKPj4+IGRlYWRsb2NraW5nIGJlY2F1c2UgdGhlIHZDUFUgeW91IGFy ZSB0cnlpbmcgdG8gcGF1c2UgaXMgc3R1Y2sgd2FpdGluZwo+Pj4gb24gdGhlIGxvY2sgdGhhdCB5 b3UgYXJlIGhvbGRpbmcuCj4+Pgo+Pj4gWW91IHNob3VsZCBmaWd1cmUgb3V0IHdoZXRoZXIgeW91 IGNhbiBnZXQgaW50byB2bXhfc3RhcnRfcmVleGVjdXRlCj4+PiB3aXRob3V0IGhvbGRpbmcgYW55 IGxvY2tzLCBvciBhbHRlcm5hdGl2ZWx5IGRyb3AgdGhlIGxvY2ssIHBhdXNlIHRoZQo+Pj4gdkNQ VXMgYW5kIHBpY2sgdGhlIGxvY2sgYWdhaW4uCj4+Pgo+Pj4gU2VlIGZvciBleGFtcGxlIGhvdyBo YXBfdHJhY2tfZGlydHlfdnJhbSByZWxlYXNlcyB0aGUgbG9jayBiZWZvcmUKPj4+IGF0dGVtcHRp bmcgdG8gcGF1c2UgdGhlIGRvbWFpbiBmb3IgdGhpcyBzYW1lIHJlYXNvbi4KPj4KPj4gUmlnaHQs IHRoaXMgd2lsbCB0YWtlIG1vcmUgdGhpbmtpbmcuCj4+Cj4+IEkndmUgdW5sb2NrZWQgdGhlIHAy bSBmb3IgdGVzdGluZyBhbmQgdGhlIGluaXRpYWwgaGFuZyBpcyBnb25lLCBob3dldmVyCj4+IHRo ZSBzYW1lIHByb2JsZW0gbm93IGFwcGxpZXMgdG8gcmV4ZWNfbG9jazogbm90aGluZyBwcmV2ZW50 cyB0d28gb3IgbW9yZQo+PiBWQ1BVcyBmcm9tIGFycml2aW5nIGluIHZteF9zdGFydF9yZWV4ZWN1 dGVfaW5zdHJ1Y3Rpb24oKSBzaW11bHRhbmVvdXNseSwKPj4gYXQgd2hpY2ggcG9pbnQgb25lIG9m IHRoZW0gbWlnaHQgdGFrZSB0aGUgbG9jayBhbmQgdHJ5IHRvIHBhdXNlIHRoZQo+PiBvdGhlciwg d2hpbGUgdGhlIG90aGVyIGlzIHdhaXRpbmcgdG8gdGFrZSB0aGUgbG9jaywgd2l0aCBwcmVkaWN0 YWJsZQo+PiByZXN1bHRzLgo+Pgo+PiBPbiB0aGUgb3RoZXIgaGFuZCwgcmVsZWFzaW5nIHJleGVj X2xvY2sgYXMgd2VsbCB3aWxsIGFsbG93IHR3byBWQ1BVcyB0bwo+PiBlbmQgdXAgdHJ5aW5nIHRv IHBhdXNlIGVhY2ggb3RoZXIgKGVzcGVjaWFsbHkgdW5wbGVhc2FudCBpbiBhIDIgVkNQVQo+PiBn dWVzdCkuIEF0IGFueSBnaXZlbiBtb21lbnQsIHRoZXJlIHNob3VsZCBiZSBvbmx5IG9uZSBWQ1BV IGFsaXZlIGFuZAo+PiB0cnlpbmcgdG8gcmVleGVjdXRlIGFuIGluc3RydWN0aW9uIC0gYW5kIGF0 IGxlYXN0IG9uZSBWQ1BVIGFsaXZlIG9uIHRoZQo+PiBndWVzdC4KPj4KPj4gV2UnbGwgZ2V0IG1v cmUgY29mZmVlLCBhbmQgb2YgY291cnNlIHN1Z2dlc3Rpb25zIGFyZSBhcHByZWNpYXRlZCAoYXMg aGFzCj4+IGJlZW4gYWxsIHlvdXIgaGVscCkuCj4gCj4gSG0sIEkgZG9uJ3QgdGhpbmsgaXQncyBn ZW5lcmFsbHkgc2FmZSB0byB0cnkgdG8gcGF1c2UgZG9tYWluIHZDUFVzCj4gZnJvbSB0aGUgc2Ft ZSBkb21haW4gY29udGV4dCwgYXMgeW91IHNheSBpdCdzIGxpa2VseSB0byBkZWFkbG9jayBzaW5j ZQo+IHR3byB2Q1BVcyBmcm9tIHRoZSBzYW1lIGRvbWFpbiBtaWdodCB0cnkgdG8gcGF1c2Ugb25l IGFub3RoZXIuCj4gCj4gTXkga25vd2xlZGdlIG9mIGFsbCB0aGlzIGludHJvc3BlY3Rpb24gbG9n aWMgaXMgdmVyeSB2YWd1ZSwgZG8geW91Cj4gcmVhbGx5IG5lZWQgdG8gc3RvcCB0aGUgb3RoZXIg dkNQVXMgd2hpbGUgcGVyZm9ybWluZyB0aGlzIHJlZXhlY3V0aW9uPwo+IAo+IFdoYXQgYXJlIHlv dSB0cnlpbmcgdG8gcHJldmVudCBieSBwYXVzaW5nIG90aGVyIHZDUFVzPwoKWWVzLCB0aGF0J3Mg dW5mb3J0dW5hdGVseSB2ZXJ5IG5lY2Vzc2FyeS4KClRoZSBzY2VuYXJpbyBpcyB0aGlzOiBmb3Ig aW50cm9zcGVjdGlvbiBwdXJwb3NlcywgYSBidW5jaCBvZiBwYWdlcyBhcmUKbWFya2VkIHJlYWQt b25seSBpbiB0aGUgRVBUIChvciBuby1leGVjdXRlLCBidXQgZm9yIHRoZSBwdXJwb3NlcyBvZiB0 aGlzCmV4YW1wbGUgbGV0J3Mgc3RpY2sgdG8gcmVhZC1vbmx5KS4KCk5vdywgd2UnbGwgZ2V0IHZt X2V2ZW50cyB3aGVuZXZlciBhbiBpbnN0cnVjdGlvbiB3aWxsIHRyeSB0byB3cml0ZSBpbnRvCm9u ZSBvZiB0aG9zZS4gVm1fZXZlbnRzIGFyZSBleHBlbnNpdmUsIHNvIHdlIF9yZWFsbHlfIHdhbnQg dG8gZ2V0IGFzIGZldwpvZiB0aG9zZSBhcyBwb3NzaWJsZSB3aGlsZSBzdGlsbCBrZWVwaW5nIHRo ZSBndWVzdCBwcm90ZWN0ZWQuIFNvIHdlIHdhbnQKdG8gZmlsdGVyIG91dCBpcnJlbGV2YW50IG9u ZXMuCgpUaGUgbWFpbiBjYXRlZ29yeSBvZiBpcnJlbGV2YW50IG9uZXMgYXJlIGZhdWx0cyBjYXVz ZWQgYnkgd2Fsa2luZyB0aGUKZ3Vlc3QncyBwYWdlIHRhYmxlLiBXZSBvbmx5IHdhbnQgZXZlbnRz IGNhdXNlZCBieSBhbiBhY3R1YWwgd3JpdGUgaW50byBhCnByb3RlY3RlZCBwYWdlIGJ5IGFuIGFj dHVhbCBpbnN0cnVjdGlvbiBydW5uaW5nIGF0IFJJUCBpbiB0aGUgZ3Vlc3QuCgpTbywgd2UgZG9u J3Qgd2FudCB0byBnZXQgdGhvc2Ugdm1fZXZlbnRzIHdoZXJlIG5wZmVjLmtpbmQgIT0KbnBmZWNf a2luZF93aXRoX2dsYSBpbiBwMm1fbWVtX2FjY2Vzc19jaGVjaygpLCBoZW5jZSB0aGlzIHBhdGNo OgoKaHR0cHM6Ly94ZW5iaXRzLnhlbi5vcmcvZ2l0d2ViLz9wPXhlbi5naXQ7YT1jb21taXRkaWZm O2g9YzUzODdjNGQ3NTYwMmRiYjJmMGQzZDk2MWE1YzRiOGZhZjM4NzNkYgoKX0hvd2V2ZXJfLCBw bGVhc2UgcGljdHVyZSBhbiBpbnN0cnVjdGlvbiB0aGF0IGJvdGggd3JpdGVzIGludG8gYSBwYWdl IFAxCndlJ3JlIGludGVyZXN0ZWQgaW4sIF9hbmRfIGNhdXNlcyBhIHdyaXRlIGludG8gYSByZWFk LW9ubHkgcGFnZS13YWxrCnJlbGF0ZWQgcGFnZSBQMi4gRW11bGF0aW5nIHRoZSBjdXJyZW50IGlu c3RydWN0aW9uLCBhcyB0aGUgdXBzdHJlYW0KcGF0Y2ggZG9lcywgZG9lcyBlbGltaW5hdGUgdGhl IHZtX2V2ZW50IGNhdXNlZCBieSB3cml0aW5nIGludG8gUDIsIGJ1dAp3aXRoIHRoZSB1bmZvcnR1 bmF0ZSBzaWRlLWVmZmVjdCBvZiBsb3NpbmcgYSBwb3RlbnRpYWxseSBjcml0aWNhbCBldmVudApm b3IgdGhlIHdyaXRlIGludG8gUDEuCgpXaGF0IHRoaXMgcGF0Y2ggYXR0ZW1wdHMgdG8gZG8gaXMg dG8gbWFyayBQMSByd3ggKHNvIGFsbG93IHRoZSB3cml0ZSksCnRoZW4gcHV0IHRoZSBmYXVsdGlu ZyBWQ1BVIGludG8gc2luZ2xlc3RlcCBtb2RlLCB0aGVuIHJlc3RvcmUgdGhlCnJlc3RyaWN0aW9u cyBhZnRlciBpdCBoYXMgZmluaXNoZWQgc2luZ2xlIHN0ZXBwaW5nLiBCeSBub3cgaXQncyBvYnZp b3VzCndoeSBhbGwgdGhlIG90aGVyIFZDUFVzIG5lZWQgdG8gYmUgcGF1c2VkOiBvbmUgb2YgdGhl bSBtaWdodCBkbyBhCm1hbGljaW91cyB3cml0ZSBpbnRvIFAxIHRoYXQgc2lsZW50bHkgc3VjY2Vl ZHMgKHNpbmNlIHRoZSBFUFQgaXMgc2hhcmVkCmFtb25nIGFsbCBWQ1BVcyAtIHB1dHRpbmcgYWx0 cDJtIGFzaWRlIGZvciBhIG1vbWVudCkuIFdlIGRvbid0IHdhbnQgdGhhdC4KCkFsdGVybmF0aXZl bHksIHdlJ2QgYmUgaGFwcHkgd2l0aCBzaW1wbHkgYmVpbmcgYWJsZSB0byBzZXQgdGhlIHJlbGV2 YW50CkEvRCBiaXRzIGluIHRoZSBwYWdlcyB0b3VjaGVkIGJ5IHRoZSBwYWdlIHdhbGssIGJ1dCBh ZnRlciBsZW5naHR5Cm5lZ290aWF0aW9ucyB0aGF0IGNhbiBiZSBmb3VuZCBpbiB0aGUgeGVuLWRl dmVsIGFyY2hpdmVzIHdlIHdlcmUgdW5hYmxlCnRvIGZpbmQgYSBzYWZlLCBhcmNoaXRlY3R1cmFs bHkgY29ycmVjdCB3YXkgb2YgZG9pbmcgdGhhdC4KCkkgaG9wZSB0aGlzIHNoZWRzIHNvbWUgbGln aHQgb24gaXQuCgoKVGhhbmtzLApSYXp2YW4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3Rz LnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0 aW5mby94ZW4tZGV2ZWw=