From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roger Pau =?utf-8?B?TW9ubsOp?= Subject: Re: [PATCH v1] x86/hvm: Generic instruction re-execution mechanism for execute faults Date: Wed, 21 Nov 2018 10:56:54 +0100 Message-ID: <20181121095654.6lez6zzstpl45qtt@mac> References: <20181116100624.21977-1-aisaila@bitdefender.com> <20181116170412.xrwuun3cqxll22l3@mac> <3d3ae38a-bfae-9908-dac6-163216f900e3@bitdefender.com> <20181119150824.lfquw2j2ehhvjbhk@mac> <638d0c37-68aa-6e68-480e-f3c1cc74777d@bitdefender.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gPPFq-0007TZ-91 for xen-devel@lists.xenproject.org; Wed, 21 Nov 2018 09:57:06 +0000 Content-Disposition: inline In-Reply-To: <638d0c37-68aa-6e68-480e-f3c1cc74777d@bitdefender.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Alexandru Stefan ISAILA Cc: "kevin.tian@intel.com" , "tamas@tklengyel.com" , "wei.liu2@citrix.com" , "jbeulich@suse.com" , "rcojocaru@bitdefender.com" , "george.dunlap@eu.citrix.com" , "andrew.cooper3@citrix.com" , Mihai =?utf-8?B?RG9uyJt1?= , Andrei Vlad LUTAS , "jun.nakajima@intel.com" , "xen-devel@lists.xenproject.org" , Anshul Makkar List-Id: xen-devel@lists.xenproject.org T24gTW9uLCBOb3YgMTksIDIwMTggYXQgMDM6NTY6MTRQTSArMDAwMCwgQWxleGFuZHJ1IFN0ZWZh biBJU0FJTEEgd3JvdGU6Cj4gCj4gCj4gT24gMTkuMTEuMjAxOCAxNzowOCwgUm9nZXIgUGF1IE1v bm7DqSB3cm90ZToKPiA+IE9uIE1vbiwgTm92IDE5LCAyMDE4IGF0IDAxOjMwOjA5UE0gKzAwMDAs IEFsZXhhbmRydSBTdGVmYW4gSVNBSUxBIHdyb3RlOgo+ID4+Pj4gKyAgICAvKiBOb3cgdHJhbnNm b3JtIG91ciBSV1ggdmFsdWVzIGluIGEgWEVOTUVNX2FjY2Vzc18qIGNvbnN0YW50LiAqLwo+ID4+ Pj4gKyAgICBpZiAoIHIgPT0gMCAmJiB3ID09IDAgJiYgeCA9PSAwICkKPiA+Pj4+ICsgICAgICAg IG5ld19hY2Nlc3MgPSBYRU5NRU1fYWNjZXNzX247Cj4gPj4+PiArICAgIGVsc2UgaWYgKCByID09 IDAgJiYgdyA9PSAwICYmIHggPT0gMSApCj4gPj4+PiArICAgICAgICBuZXdfYWNjZXNzID0gWEVO TUVNX2FjY2Vzc194Owo+ID4+Pj4gKyAgICBlbHNlIGlmICggciA9PSAwICYmIHcgPT0gMSAmJiB4 ID09IDAgKQo+ID4+Pj4gKyAgICAgICAgbmV3X2FjY2VzcyA9IFhFTk1FTV9hY2Nlc3NfdzsKPiA+ Pj4+ICsgICAgZWxzZSBpZiAoIHIgPT0gMCAmJiB3ID09IDEgJiYgeCA9PSAxICkKPiA+Pj4+ICsg ICAgICAgIG5ld19hY2Nlc3MgPSBYRU5NRU1fYWNjZXNzX3d4Owo+ID4+Pj4gKyAgICBlbHNlIGlm ICggciA9PSAxICYmIHcgPT0gMCAmJiB4ID09IDAgKQo+ID4+Pj4gKyAgICAgICAgbmV3X2FjY2Vz cyA9IFhFTk1FTV9hY2Nlc3NfcjsKPiA+Pj4+ICsgICAgZWxzZSBpZiAoIHIgPT0gMSAmJiB3ID09 IDAgJiYgeCA9PSAxICkKPiA+Pj4+ICsgICAgICAgIG5ld19hY2Nlc3MgPSBYRU5NRU1fYWNjZXNz X3J4Owo+ID4+Pj4gKyAgICBlbHNlIGlmICggciA9PSAxICYmIHcgPT0gMSAmJiB4ID09IDAgKQo+ ID4+Pj4gKyAgICAgICAgbmV3X2FjY2VzcyA9IFhFTk1FTV9hY2Nlc3Nfcnc7Cj4gPj4+PiArICAg IGVsc2UgaWYgKCByID09IDEgJiYgdyA9PSAxICYmIHggPT0gMSApCj4gPj4+PiArICAgICAgICBu ZXdfYWNjZXNzID0gWEVOTUVNX2FjY2Vzc19yd3g7Cj4gPj4+PiArICAgIGVsc2UKPiA+Pj4+ICsg ICAgICAgIG5ld19hY2Nlc3MgPSByZXF1aXJlZF9hY2Nlc3M7IC8qIFNob3VsZCBuZXZlciBnZXQg aGVyZS4gKi8KPiA+Pj4KPiA+Pj4gVGhlcmUgc2VlbXMgdG8gYmUgYSBsb3Qgb2YgdHJhbnNsYXRp b24gZnJvbSB4ZW5tZW1fYWNjZXNzX3QgdG8gYm9vbAo+ID4+PiBmaWVsZHMgYW5kIHRoZW4gdG8g eGVubWVtX2FjY2Vzc190IGFnYWluLiBDYW4ndCB5b3UganVzdCBhdm9pZCB0aGUKPiA+Pj4gYm9v bGVhbnM/Cj4gPj4KPiA+PiBUaGUgdHJhbnNsYXRpb24gaXMgZG9uZSBiZWNhdXNlIHRoZSByaWdo dHMgYXJlIGN1bXVsYXRpdmUgYW5kIEkgdGhpbmsKPiA+PiB0aGlzIGlzIHRoZSBjbGVhciB3YXkg dG8gZG8gdGhpcy4KPiA+IAo+ID4gU28gdGhlIHN3aXRjaCBjb252ZXJ0cyByZXF1aXJlZF9hY2Nl c3MgdXNpbmcgdGhlIGZvbGxvd2luZyByZWxhdGlvbjoKPiA+IAo+ID4gX3IgICAtPiByID0gMSB3 ID0gMCB4ID0gMAo+ID4gX3cgICAtPiByID0gMCB3ID0gMSB4ID0gMAo+ID4gX3ggICAtPiByID0g MCB3ID0gMCB4ID0gMQo+ID4gX3J4ICAtPiByID0gMSB3ID0gMSB4ID0gMAo+ID4gX3d4ICAtPiBy ID0gMCB3ID0gMSB4ID0gMQo+ID4gX3J3ICAtPiByID0gMSB3ID0gMSB4ID0gMAo+ID4gX3J3eCAt PiByID0gMSB3ID0gMSB4ID0gMQo+ID4gCj4gPiBUaGVuIHRoZSBpZiBiZWxvdyBwZXJmb3JtcyB0 aGUgZm9sbG93aW5nIHRyYW5zZm9ybWF0aW9uOgo+ID4gCj4gPiByID0gMCB3ID0gMCB4ID0gMCAt PiBfbgo+ID4gciA9IDEgdyA9IDAgeCA9IDAgLT4gX3IKPiA+IHIgPSAwIHcgPSAxIHggPSAwIC0+ IF93Cj4gPiByID0gMCB3ID0gMCB4ID0gMSAtPiBfeAo+ID4gciA9IDEgdyA9IDEgeCA9IDAgLT4g X3J3Cj4gPiByID0gMCB3ID0gMSB4ID0gMSAtPiBfd3gKPiA+IHIgPSAxIHcgPSAxIHggPSAwIC0+ IF9ydwo+ID4gciA9IDEgdyA9IDEgeCA9IDEgLT4gX3J3eAo+ID4gCj4gPiBJJ20gbm90IHN1cmUg SSB1bmRlcnN0YW5kIHRoaXMgY2h1bmsgb2YgY29kZSwgYmVjYXVzZSB5b3UgZW5kIHVwCj4gPiBn ZXR0aW5nIGV4YWN0bHkgdGhlIHNhbWUgdHlwZSB0aGF0IHlvdSBoYXZlIGFzIHRoZSBpbnB1dCwg YW5kIGEgdHlwZQo+ID4gbm90IGxpc3RlZCBoZXJlIGlzIGp1c3Qgc2lsZW50bHkgcGFzc2VkIHRo cm91Z2gsIHNvIEkgZG9uJ3Qgc2VlIHRoZQo+ID4gcG9pbnQgaW4gZG9pbmcgdGhpcyB0cmFuc2Zv cm1hdGlvbi4KPiAKPiBUaGUgZmlyc3Qgc3dpdGNoIGlzIGZvciBjdXJfYWNjZXNzIGFuZCBpdCBz ZXRzIHIsdyx4IGFjY29yZGluZ2x5LAo+IHRoZSBzZWNvbmQgc3dpdGNoIGlzIHJlcXVpcmVkX2Fj Y2VzcyB3aGVyZSByLHcseCBhcmUgYXBwZW5kZWQKPiBhbmQgdGhlbiBpbiB0aGUgbGFzdCBpZigp Li4gcGFydCBuZXdfYWNjZXNzIGlzIGFzc2lnbmVkIGFjY29yZGluZyB0byB0aGUKPiBwcmV2aW91 cyBhc3NpZ25tZW50cyBvZiByLHcseC4KCkkgd291bGQgbW92ZSB0aGUgY29kZSB0aGF0IGNvbnZl cnRzIHhlbm1lbV9hY2Nlc3NfdCBpbnRvIGEgc2VwYXJhdGUKaGVscGVyIChhcyBpdCdzIHVzZWQg aW4gdHdvIGRpZmZlcmVudCBwbGFjZXMpLCBhbmQgdXNlIGEgYml0bWFwCmluc3RlYWQgb2YgMyBi b29sZWFuIHZhcmlhYmxlcywgc28geW91IGNhbiBkbzoKCnZvaWQgY29udmVydF9hY2Nlc3MoeGVu bWVtX2FjY2Vzc190ICphY2Nlc3MsIHVuc2lnbmVkIGludCAqYXR0cikKCkFuZCBkb24ndCBuZWVk IHRvIHJlcGVhdCB0aGUgc3dpdGNoIGluIHR3byBkaWZmZXJlbnQgcGxhY2VzLgoKPiA+IAo+ID4+ Cj4gPj4+PiAgICAgICAgaWYgKCB2bV9ldmVudF9jaGVja19yaW5nKGQtPnZtX2V2ZW50X21vbml0 b3IpICYmCj4gPj4+PiAgICAgICAgICAgICBkLT5hcmNoLm1vbml0b3IuaW5ndWVzdF9wYWdlZmF1 bHRfZGlzYWJsZWQgJiYKPiA+Pj4+IC0gICAgICAgICBucGZlYy5raW5kICE9IG5wZmVjX2tpbmRf d2l0aF9nbGEgKSAvKiBkb24ndCBzZW5kIGEgbWVtX2V2ZW50ICovCj4gPj4+PiArICAgICAgICAg bnBmZWMua2luZCAhPSBucGZlY19raW5kX3dpdGhfZ2xhICYmCj4gPj4+PiArICAgICAgICAgaHZt X2Z1bmNzLnN0YXJ0X3JlZXhlY3V0ZV9pbnN0cnVjdGlvbiApIC8qIGRvbid0IHNlbmQgYSBtZW1f ZXZlbnQgKi8KPiA+Pj4+ICAgICAgICB7Cj4gPj4+PiAtICAgICAgICBodm1fZW11bGF0ZV9vbmVf dm1fZXZlbnQoRU1VTF9LSU5EX05PUk1BTCwgVFJBUF9pbnZhbGlkX29wLCBYODZfRVZFTlRfTk9f RUMpOwo+ID4+Pj4gLQo+ID4+Pj4gKyAgICAgICAgdi0+YXJjaC52bV9ldmVudC0+ZW11bGF0ZV9m bGFncyA9IDA7Cj4gPj4+PiArICAgICAgICBodm1fZnVuY3Muc3RhcnRfcmVleGVjdXRlX2luc3Ry dWN0aW9uKHYsIGdwYSwgWEVOTUVNX2FjY2Vzc19ydyk7Cj4gPj4+PiAgICAgICAgICAgIHJldHVy biB0cnVlOwo+ID4+Pj4gICAgICAgIH0KPiA+Pj4KPiA+Pj4gRG9uJ3QgeW91IG5lZWQgdG8gZmFs bGJhY2sgdG8gdXNpbmcgaHZtX2VtdWxhdGVfb25lX3ZtX2V2ZW50IGlmCj4gPj4+IHN0YXJ0X3Jl ZXhlY3V0ZV9pbnN0cnVjdGlvbiBpcyBub3QgYXZhaWxhYmxlPwo+ID4+Cj4gPj4gRmFsbGJhY2sg d2l0aCBodm1fZW11bGF0ZV9vbmVfdm1fZXZlbnQgY2FuIHJlc3VsdCBpbiBsb29zaW5nIGV2ZW50 cy4KPiA+IAo+ID4gQnV0IGJ5IGNoYW5naW5nIHRoaXMgaGVyZSB1bmNvbmRpdGlvbmFsbHkgeW91 IGFyZSByZW1vdmluZyB0aGlzCj4gPiBmdW5jdGlvbmFsaXR5IG9uIEFNRCBoYXJkd2FyZSwgd2hp Y2ggaXQgdXNlZCB0byBoYXZlIGJlZm9yZSBieSBtYWtpbmcKPiA+IHVzZSBvZiBodm1fZW11bGF0 ZV9vbmVfdm1fZXZlbnQuCj4gPiAKPiA+IEkgdGhpbmsgdGhpcyBuZWVkcyB0byBhdCBsZWFzdCBi ZSB3cml0dGVuIGluIHRoZSBjb21taXQgbWVzc2FnZS4KPiAKPiBGb3IgQU1EIEkgY291bGQgYWRk IGlmIChjcHVfaGFzX3N2bSgpKSBhbmQgY2FsbCBlbXVsYXRlX29uZV92bV9ldmVudC4gCgpJIHdv dWxkIGp1c3QgdXNlIGh2bV9lbXVsYXRlX29uZV92bV9ldmVudCBpZgpodm1fZnVuY3Muc3RhcnRf cmVleGVjdXRlX2luc3RydWN0aW9uIGlzIHVuc2V0LCBvciBlbHNlIGFuIGV4cGxhbmF0aW9uCm5l ZWRzIHRvIGJlIGFkZGVkIHRvIHRoZSBjb21taXQgbWVzc2FnZSBhYm91dCB3aHkKaHZtX2VtdWxh dGVfb25lX3ZtX2V2ZW50IGlzIG5vdCBzdWl0YWJsZS4KCkFsc28sIGFmdGVyIGxvb2tpbmcgYXQg dGhlIGNvZGUgSSdtIG5vdCBzdXJlIEkgc2VlIHdoeSB0aGlzIG5lZWRzIHRvCmJlIFZNWCBzcGVj aWZpYywgQUZBSUNUIGl0IGRvZXNuJ3QgZGlyZWN0bHkgY2FsbCBhbnkgVk1YIGZ1bmN0aW9ucz8K ClRoYW5rcywgUm9nZXIuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0 Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRl dmVs