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: Fri, 23 Nov 2018 09:54:02 +0100 Message-ID: <20181123085402.663pdh75rhqtxsf4@mac> References: 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 1gQ7E8-0006BO-Mo for xen-devel@lists.xenproject.org; Fri, 23 Nov 2018 08:54:16 +0000 Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Razvan Cojocaru Cc: "kevin.tian@intel.com" , "tamas@tklengyel.com" , "wei.liu2@citrix.com" , "jbeulich@suse.com" , "george.dunlap@eu.citrix.com" , "andrew.cooper3@citrix.com" , Mihai =?utf-8?B?RG9uyJt1?= , Andrei Vlad LUTAS , "jun.nakajima@intel.com" , Alexandru Stefan ISAILA , "xen-devel@lists.xenproject.org" List-Id: xen-devel@lists.xenproject.org T24gVGh1LCBOb3YgMjIsIDIwMTggYXQgMDg6MjQ6NTJQTSArMDIwMCwgUmF6dmFuIENvam9jYXJ1 IHdyb3RlOgo+IE9uIDExLzIyLzE4IDc6MDggUE0sIFJvZ2VyIFBhdSBNb25uw6kgd3JvdGU6Cj4g PiBPbiBUaHUsIE5vdiAyMiwgMjAxOCBhdCAwNjo1MjowN1BNICswMjAwLCBSYXp2YW4gQ29qb2Nh cnUgd3JvdGU6Cj4gPj4gT24gMTEvMjIvMTggNTozNyBQTSwgUm9nZXIgUGF1IE1vbm7DqSB3cm90 ZToKPiA+Pj4gSSBkb24ndCB0aGluayB5b3UgYXJlIHN1cHBvc2VkIHRvIHRyeSB0byBwYXVzZSBv dGhlciB2Y3B1cyB3aGlsZQo+ID4+PiBob2xkaW5nIGEgbG9jaywgYXMgeW91IGNhbiBzZWUgaXQn cyBxdWl0ZSBsaWtlbHkgdGhhdCB5b3Ugd2lsbCBlbmQgdXAKPiA+Pj4gZGVhZGxvY2tpbmcgYmVj YXVzZSB0aGUgdkNQVSB5b3UgYXJlIHRyeWluZyB0byBwYXVzZSBpcyBzdHVjayB3YWl0aW5nCj4g Pj4+IG9uIHRoZSBsb2NrIHRoYXQgeW91IGFyZSBob2xkaW5nLgo+ID4+Pgo+ID4+PiBZb3Ugc2hv dWxkIGZpZ3VyZSBvdXQgd2hldGhlciB5b3UgY2FuIGdldCBpbnRvIHZteF9zdGFydF9yZWV4ZWN1 dGUKPiA+Pj4gd2l0aG91dCBob2xkaW5nIGFueSBsb2Nrcywgb3IgYWx0ZXJuYXRpdmVseSBkcm9w IHRoZSBsb2NrLCBwYXVzZSB0aGUKPiA+Pj4gdkNQVXMgYW5kIHBpY2sgdGhlIGxvY2sgYWdhaW4u Cj4gPj4+Cj4gPj4+IFNlZSBmb3IgZXhhbXBsZSBob3cgaGFwX3RyYWNrX2RpcnR5X3ZyYW0gcmVs ZWFzZXMgdGhlIGxvY2sgYmVmb3JlCj4gPj4+IGF0dGVtcHRpbmcgdG8gcGF1c2UgdGhlIGRvbWFp biBmb3IgdGhpcyBzYW1lIHJlYXNvbi4KPiA+Pgo+ID4+IFJpZ2h0LCB0aGlzIHdpbGwgdGFrZSBt b3JlIHRoaW5raW5nLgo+ID4+Cj4gPj4gSSd2ZSB1bmxvY2tlZCB0aGUgcDJtIGZvciB0ZXN0aW5n IGFuZCB0aGUgaW5pdGlhbCBoYW5nIGlzIGdvbmUsIGhvd2V2ZXIKPiA+PiB0aGUgc2FtZSBwcm9i bGVtIG5vdyBhcHBsaWVzIHRvIHJleGVjX2xvY2s6IG5vdGhpbmcgcHJldmVudHMgdHdvIG9yIG1v cmUKPiA+PiBWQ1BVcyBmcm9tIGFycml2aW5nIGluIHZteF9zdGFydF9yZWV4ZWN1dGVfaW5zdHJ1 Y3Rpb24oKSBzaW11bHRhbmVvdXNseSwKPiA+PiBhdCB3aGljaCBwb2ludCBvbmUgb2YgdGhlbSBt aWdodCB0YWtlIHRoZSBsb2NrIGFuZCB0cnkgdG8gcGF1c2UgdGhlCj4gPj4gb3RoZXIsIHdoaWxl IHRoZSBvdGhlciBpcyB3YWl0aW5nIHRvIHRha2UgdGhlIGxvY2ssIHdpdGggcHJlZGljdGFibGUK PiA+PiByZXN1bHRzLgo+ID4+Cj4gPj4gT24gdGhlIG90aGVyIGhhbmQsIHJlbGVhc2luZyByZXhl Y19sb2NrIGFzIHdlbGwgd2lsbCBhbGxvdyB0d28gVkNQVXMgdG8KPiA+PiBlbmQgdXAgdHJ5aW5n IHRvIHBhdXNlIGVhY2ggb3RoZXIgKGVzcGVjaWFsbHkgdW5wbGVhc2FudCBpbiBhIDIgVkNQVQo+ ID4+IGd1ZXN0KS4gQXQgYW55IGdpdmVuIG1vbWVudCwgdGhlcmUgc2hvdWxkIGJlIG9ubHkgb25l IFZDUFUgYWxpdmUgYW5kCj4gPj4gdHJ5aW5nIHRvIHJlZXhlY3V0ZSBhbiBpbnN0cnVjdGlvbiAt IGFuZCBhdCBsZWFzdCBvbmUgVkNQVSBhbGl2ZSBvbiB0aGUKPiA+PiBndWVzdC4KPiA+Pgo+ID4+ IFdlJ2xsIGdldCBtb3JlIGNvZmZlZSwgYW5kIG9mIGNvdXJzZSBzdWdnZXN0aW9ucyBhcmUgYXBw cmVjaWF0ZWQgKGFzIGhhcwo+ID4+IGJlZW4gYWxsIHlvdXIgaGVscCkuCj4gPiAKPiA+IEhtLCBJ IGRvbid0IHRoaW5rIGl0J3MgZ2VuZXJhbGx5IHNhZmUgdG8gdHJ5IHRvIHBhdXNlIGRvbWFpbiB2 Q1BVcwo+ID4gZnJvbSB0aGUgc2FtZSBkb21haW4gY29udGV4dCwgYXMgeW91IHNheSBpdCdzIGxp a2VseSB0byBkZWFkbG9jayBzaW5jZQo+ID4gdHdvIHZDUFVzIGZyb20gdGhlIHNhbWUgZG9tYWlu IG1pZ2h0IHRyeSB0byBwYXVzZSBvbmUgYW5vdGhlci4KPiA+IAo+ID4gTXkga25vd2xlZGdlIG9m IGFsbCB0aGlzIGludHJvc3BlY3Rpb24gbG9naWMgaXMgdmVyeSB2YWd1ZSwgZG8geW91Cj4gPiBy ZWFsbHkgbmVlZCB0byBzdG9wIHRoZSBvdGhlciB2Q1BVcyB3aGlsZSBwZXJmb3JtaW5nIHRoaXMg cmVleGVjdXRpb24/Cj4gPiAKPiA+IFdoYXQgYXJlIHlvdSB0cnlpbmcgdG8gcHJldmVudCBieSBw YXVzaW5nIG90aGVyIHZDUFVzPwo+IAo+IFllcywgdGhhdCdzIHVuZm9ydHVuYXRlbHkgdmVyeSBu ZWNlc3NhcnkuCj4gCj4gVGhlIHNjZW5hcmlvIGlzIHRoaXM6IGZvciBpbnRyb3NwZWN0aW9uIHB1 cnBvc2VzLCBhIGJ1bmNoIG9mIHBhZ2VzIGFyZQo+IG1hcmtlZCByZWFkLW9ubHkgaW4gdGhlIEVQ VCAob3Igbm8tZXhlY3V0ZSwgYnV0IGZvciB0aGUgcHVycG9zZXMgb2YgdGhpcwo+IGV4YW1wbGUg bGV0J3Mgc3RpY2sgdG8gcmVhZC1vbmx5KS4KPiAKPiBOb3csIHdlJ2xsIGdldCB2bV9ldmVudHMg d2hlbmV2ZXIgYW4gaW5zdHJ1Y3Rpb24gd2lsbCB0cnkgdG8gd3JpdGUgaW50bwo+IG9uZSBvZiB0 aG9zZS4gVm1fZXZlbnRzIGFyZSBleHBlbnNpdmUsIHNvIHdlIF9yZWFsbHlfIHdhbnQgdG8gZ2V0 IGFzIGZldwo+IG9mIHRob3NlIGFzIHBvc3NpYmxlIHdoaWxlIHN0aWxsIGtlZXBpbmcgdGhlIGd1 ZXN0IHByb3RlY3RlZC4gU28gd2Ugd2FudAo+IHRvIGZpbHRlciBvdXQgaXJyZWxldmFudCBvbmVz Lgo+IAo+IFRoZSBtYWluIGNhdGVnb3J5IG9mIGlycmVsZXZhbnQgb25lcyBhcmUgZmF1bHRzIGNh dXNlZCBieSB3YWxraW5nIHRoZQo+IGd1ZXN0J3MgcGFnZSB0YWJsZS4gV2Ugb25seSB3YW50IGV2 ZW50cyBjYXVzZWQgYnkgYW4gYWN0dWFsIHdyaXRlIGludG8gYQo+IHByb3RlY3RlZCBwYWdlIGJ5 IGFuIGFjdHVhbCBpbnN0cnVjdGlvbiBydW5uaW5nIGF0IFJJUCBpbiB0aGUgZ3Vlc3QuCj4gCj4g U28sIHdlIGRvbid0IHdhbnQgdG8gZ2V0IHRob3NlIHZtX2V2ZW50cyB3aGVyZSBucGZlYy5raW5k ICE9Cj4gbnBmZWNfa2luZF93aXRoX2dsYSBpbiBwMm1fbWVtX2FjY2Vzc19jaGVjaygpLCBoZW5j ZSB0aGlzIHBhdGNoOgo+IAo+IGh0dHBzOi8veGVuYml0cy54ZW4ub3JnL2dpdHdlYi8/cD14ZW4u Z2l0O2E9Y29tbWl0ZGlmZjtoPWM1Mzg3YzRkNzU2MDJkYmIyZjBkM2Q5NjFhNWM0YjhmYWYzODcz ZGIKPiAKPiBfSG93ZXZlcl8sIHBsZWFzZSBwaWN0dXJlIGFuIGluc3RydWN0aW9uIHRoYXQgYm90 aCB3cml0ZXMgaW50byBhIHBhZ2UgUDEKPiB3ZSdyZSBpbnRlcmVzdGVkIGluLCBfYW5kXyBjYXVz ZXMgYSB3cml0ZSBpbnRvIGEgcmVhZC1vbmx5IHBhZ2Utd2Fsawo+IHJlbGF0ZWQgcGFnZSBQMi4g RW11bGF0aW5nIHRoZSBjdXJyZW50IGluc3RydWN0aW9uLCBhcyB0aGUgdXBzdHJlYW0KPiBwYXRj aCBkb2VzLCBkb2VzIGVsaW1pbmF0ZSB0aGUgdm1fZXZlbnQgY2F1c2VkIGJ5IHdyaXRpbmcgaW50 byBQMiwgYnV0Cj4gd2l0aCB0aGUgdW5mb3J0dW5hdGUgc2lkZS1lZmZlY3Qgb2YgbG9zaW5nIGEg cG90ZW50aWFsbHkgY3JpdGljYWwgZXZlbnQKPiBmb3IgdGhlIHdyaXRlIGludG8gUDEuCgpIb3cg Y291bGQgdGhlIGV2ZW50IGZvciBQMSBiZSBsb3N0PyBJZiB0aGUgaW5zdHJ1Y3Rpb24gd3JpdGVz IHRvIGJvdGgKUDEgYW5kIFAyLCB5b3UgYWxyZWFkeSBnb3Qgc29tZSBraW5kIG9mIGV2ZW50IHNp bmNlIHdyaXRpbmcgdG8gUDEKd291bGQgdHJpZ2dlciBhIGZhdWx0LiBUaGVuIHlvdSBjYW4ganVz dCBkaXNjYXJkIHRoZSBQMiBwYXJ0LCBmb3J3YXJkCnRoZSBQMSBhY2Nlc3MgYW5kIGp1c3QgZW11 bGF0ZSB0aGUgaW5zdHJ1Y3Rpb24/CgooSSBndWVzcyBJJ20gbWlzc2luZyBzb21ldGhpbmcgb24g dGhlIGFib3ZlKQoKPiBXaGF0IHRoaXMgcGF0Y2ggYXR0ZW1wdHMgdG8gZG8gaXMgdG8gbWFyayBQ MSByd3ggKHNvIGFsbG93IHRoZSB3cml0ZSksCj4gdGhlbiBwdXQgdGhlIGZhdWx0aW5nIFZDUFUg aW50byBzaW5nbGVzdGVwIG1vZGUsIHRoZW4gcmVzdG9yZSB0aGUKPiByZXN0cmljdGlvbnMgYWZ0 ZXIgaXQgaGFzIGZpbmlzaGVkIHNpbmdsZSBzdGVwcGluZy4gQnkgbm93IGl0J3Mgb2J2aW91cwo+ IHdoeSBhbGwgdGhlIG90aGVyIFZDUFVzIG5lZWQgdG8gYmUgcGF1c2VkOiBvbmUgb2YgdGhlbSBt aWdodCBkbyBhCj4gbWFsaWNpb3VzIHdyaXRlIGludG8gUDEgdGhhdCBzaWxlbnRseSBzdWNjZWVk cyAoc2luY2UgdGhlIEVQVCBpcyBzaGFyZWQKPiBhbW9uZyBhbGwgVkNQVXMgLSBwdXR0aW5nIGFs dHAybSBhc2lkZSBmb3IgYSBtb21lbnQpLiBXZSBkb24ndCB3YW50IHRoYXQuCgpDYW4ndCB5b3Ug anVzdCBjaGFuZ2UgdGhlIHAybSBvZiBhIHNpbmdsZSB2Q1BVPyBFaXRoZXIgdXNpbmcgYWx0cDJt IG9yCnNvbWUgb3RoZXIgbWVjaGFuaXNtLgoKQWxzbyBrZWVwIGluIG1pbmQgdGhhdCB0aGlzIHBh dXNlIGFwcHJvYWNoIG1pZ2h0IHdvcmsgZm9yIGd1ZXN0cyB3aXRoCmEgcmVsYXRpdmVseSBzbWFs bCBudW1iZXIgb2YgdkNQVXMsIGJ1dCBJJ20gdW5zdXJlIHRoaXMgaXMgZ29pbmcgdG8Kd29yayBm b3IgZ3Vlc3RzIHdpdGggaGlnaCBudW1iZXIgb2YgdkNQVXMsIHBhdXNpbmcgYWxsIHZDUFVzIGZv ciBlYWNoCnRyYXBwZWQgaW5zdHJ1Y3Rpb24gaXMgbGlrZWx5IGdvaW5nIHRvIHN0YWxsIHRoZSBn dWVzdC4KClRoYW5rcywgUm9nZXIuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5w cm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8v eGVuLWRldmVs