From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Tian, Kevin" Subject: Re: Discussion about virtual iommu support for Xen guest Date: Fri, 3 Jun 2016 11:17:12 +0000 Message-ID: References: <5746B3FA.6020401@intel.com> <5746DF93.8090803@citrix.com> <57480327.60609@intel.com> <78d122f0-c773-7fa3-1258-c551937c508e@intel.com> <575081E8.6070609@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <575081E8.6070609@citrix.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: Andrew Cooper , "Lan, Tianyu" , "jbeulich@suse.com" , "sstabellini@kernel.org" , "ian.jackson@eu.citrix.com" , "xen-devel@lists.xensource.com" , "Dong, Eddie" , "Nakajima, Jun" , "yang.zhang.wz@gmail.com" , "anthony.perard@citrix.com" , Roger Pau Monne List-Id: xen-devel@lists.xenproject.org PiBGcm9tOiBBbmRyZXcgQ29vcGVyIFttYWlsdG86YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbV0N Cj4gU2VudDogRnJpZGF5LCBKdW5lIDAzLCAyMDE2IDI6NTkgQU0NCj4gDQo+IE9uIDAyLzA2LzE2 IDE2OjAzLCBMYW4sIFRpYW55dSB3cm90ZToNCj4gPiBPbiA1LzI3LzIwMTYgNDoxOSBQTSwgTGFu IFRpYW55dSB3cm90ZToNCj4gPj4gT24gMjAxNuW5tDA15pyIMjbml6UgMTk6MzUsIEFuZHJldyBD b29wZXIgd3JvdGU6DQo+ID4+PiBPbiAyNi8wNS8xNiAwOToyOSwgTGFuIFRpYW55dSB3cm90ZToN Cj4gPj4+DQo+ID4+PiBUbyBiZSB2aWFibGUgZ29pbmcgZm9yd2FyZHMsIGFueSBzb2x1dGlvbiBt dXN0IHdvcmsgd2l0aCBQVkgvSFZNTGl0ZSBhcw0KPiA+Pj4gbXVjaCBhcyBIVk0uICBUaGlzIGFs b25lIG5lZ2F0ZXMgcWVtdSBhcyBhIHZpYWJsZSBvcHRpb24uDQo+ID4+Pg0KPiA+Pj4gRnJvbSBh IGRlc2lnbiBwb2ludCBvZiB2aWV3LCBoYXZpbmcgWGVuIG5lZWRpbmcgdG8gZGVsZWdhdGUgdG8g cWVtdSB0bw0KPiA+Pj4gaW5qZWN0IGFuIGludGVycnVwdCBpbnRvIGEgZ3Vlc3Qgc2VlbXMgYmFj a3dhcmRzLg0KPiA+Pj4NCj4gPj4NCj4gPj4gU29ycnksIEkgYW0gbm90IGZhbWlsaWFyIHdpdGgg SFZNbGl0ZS4gSFZNbGl0ZSBkb2Vzbid0IHVzZSBRZW11IGFuZA0KPiA+PiB0aGUgcWVtdSB2aXJ0 dWFsIGlvbW11IGNhbid0IHdvcmsgZm9yIGl0LiBXZSBoYXZlIHRvIHJld3JpdGUgdmlydHVhbA0K PiA+PiBpb21tdSBpbiB0aGUgWGVuLCByaWdodD8NCj4gPj4NCj4gPj4+DQo+ID4+PiBBIHdob2xl IGxvdCBvZiB0aGlzIHdvdWxkIGJlIGVhc2llciB0byByZWFzb24gYWJvdXQgaWYvd2hlbiB3ZSBn ZXQgYQ0KPiA+Pj4gYmFzaWMgcm9vdCBwb3J0IGltcGxlbWVudGF0aW9uIGluIFhlbiwgd2hpY2gg aXMgbmVjZXNzYXJ5IGZvciBIVk1MaXRlLA0KPiA+Pj4gYW5kIHdoaWNoIHdpbGwgbWFrZSB0aGUg aW50ZXJhY3Rpb24gd2l0aCBxZW11IHJhdGhlciBtb3JlIGNsZWFuLiAgSXQgaXMNCj4gPj4+IHBy b2JhYmx5IHdvcnRoIGNvb3JkaW5hdGluZyB3b3JrIGluIHRoaXMgYXJlYS4NCj4gPj4NCj4gPj4g VGhlIHZpcnR1YWwgaW9tbXUgYWxzbyBzaG91bGQgYmUgdW5kZXIgYmFzaWMgcm9vdCBwb3J0IGlu IFhlbiwgcmlnaHQ/DQo+ID4+DQo+ID4+Pg0KPiA+Pj4gQXMgZm9yIHRoZSBpbmRpdmlkdWFsIGlz c3VlIG9mIDI4OHZjcHUgc3VwcG9ydCwgdGhlcmUgYXJlIGFscmVhZHkNCj4gPj4+IGlzc3Vlcw0K PiA+Pj4gd2l0aCA2NHZjcHUgZ3Vlc3RzIGF0IHRoZSBtb21lbnQuIFdoaWxlIGl0IGlzIGNlcnRh aW5seSBmaW5lIHRvIHJlbW92ZQ0KPiA+Pj4gdGhlIGhhcmQgbGltaXQgYXQgMjU1IHZjcHVzLCB0 aGVyZSBpcyBhIGxvdCBvZiBvdGhlciB3b3JrIHJlcXVpcmVkIHRvDQo+ID4+PiBldmVuIGdldCAx Mjh2Y3B1IGd1ZXN0cyBzdGFibGUuDQo+ID4+DQo+ID4+DQo+ID4+IENvdWxkIHlvdSBnaXZlIHNv bWUgcG9pbnRzIHRvIHRoZXNlIGlzc3Vlcz8gV2UgYXJlIGVuYWJsaW5nIG1vcmUgdmNwdXMNCj4g Pj4gc3VwcG9ydCBhbmQgaXQgY2FuIGJvb3QgdXAgMjU1IHZjcHVzIHdpdGhvdXQgSVIgc3VwcG9y dCBiYXNpY2FsbHkuIEl0J3MNCj4gPj4gdmVyeSBoZWxwZnVsIHRvIGxlYXJuIGFib3V0IGtub3du IGlzc3Vlcy4NCj4gPj4NCj4gPj4gV2Ugd2lsbCBhbHNvIGFkZCBtb3JlIHRlc3RzIGZvciAxMjgg dmNwdXMgaW50byBvdXIgcmVndWxhciB0ZXN0IHRvIGZpbmQNCj4gPj4gcmVsYXRlZCBidWdzLiBJ bmNyZWFzaW5nIG1heCB2Y3B1IHRvIDI1NSBzaG91bGQgYmUgYSBnb29kIHN0YXJ0Lg0KPiA+DQo+ ID4gSGkgQW5kcmV3Og0KPiA+IENvdWxkIHlvdSBnaXZlIG1vcmUgaW5wdXRzIGFib3V0IGlzc3Vl cyB3aXRoIDY0IHZjcHVzIGFuZCB3aGF0IG5lZWRzIHRvDQo+ID4gYmUgZG9uZSB0byBtYWtlIDEy OHZjcHUgZ3Vlc3Qgc3RhYmxlPyBXZSBob3BlIHRvIGRvIHNvbWV0aGluZ3MgdG8NCj4gPiBpbXBy b3ZlIHRoZW0uDQo+ID4NCj4gPiBXaGF0J3MgcHJvZ3Jlc3Mgb2YgUENJIGhvc3QgYnJpZGdlIGlu IFhlbj8gRnJvbSB5b3VyIG9waW5pb24sIHdlIHNob3VsZA0KPiA+IGRvIHRoYXQgZmlyc3QsIHJp Z2h0PyBUaGFua3MuDQo+IA0KPiBWZXJ5IHNvcnJ5IGZvciB0aGUgZGVsYXkuDQo+IA0KPiBUaGVy ZSBhcmUgbXVsdGlwbGUgaW50ZXJhY3RpbmcgaXNzdWVzIGhlcmUuICBPbiB0aGUgb25lIHNpZGUs IGl0IHdvdWxkDQo+IGJlIHVzZWZ1bCBpZiB3ZSBjb3VsZCBoYXZlIGEgY2VudHJhbCBwb2ludCBv ZiBjb29yZGluYXRpb24gb24NCj4gUFZIL0hWTUxpdGUgd29yay4gIFJvZ2VyIC0gYXMgdGhlIHBl cnNvbiB3aG8gbGFzdCBkaWQgSFZNTGl0ZSB3b3JrLA0KPiB3b3VsZCB5b3UgbWluZCBvcmdhbmlz aW5nIHRoYXQ/DQo+IA0KPiBGb3IgdGhlIHFlbXUveGVuIGludGVyYWN0aW9uLCB0aGUgY3VycmVu dCBzdGF0ZSBpcyB3b2VmdWwgYW5kIGEgdGFuZ2xlZA0KPiBtZXNzLiAgSSB3aXNoIHRvIGVuc3Vy ZSB0aGF0IHdlIGRvbid0IG1ha2UgYW55IGRldmVsb3BtZW50IGRlY2lzaW9ucw0KPiB3aGljaCBt YWtlcyB0aGUgc2l0dWF0aW9uIHdvcnNlLg0KPiANCj4gSW4geW91ciBjYXNlLCB0aGUgdHdvIG1v dGl2YXRpb25zIGFyZSBxdWl0ZSBkaWZmZXJlbnQgSSB3b3VsZCByZWNvbW1lbmQNCj4gZGVhbGlu ZyB3aXRoIHRoZW0gaW5kZXBlbmRlbnRseS4NCj4gDQo+IElJUkMsIHRoZSBpc3N1ZSB3aXRoIG1v cmUgdGhhbiAyNTUgY3B1cyBhbmQgaW50ZXJydXB0IHJlbWFwcGluZyBpcyB0aGF0DQo+IHlvdSBj YW4gb25seSB1c2UgeDJhcGljIG1vZGUgd2l0aCBtb3JlIHRoYW4gMjU1IGNwdXMsIGFuZCBJT0FQ SUMgUlRFcw0KPiBjYW4ndCBiZSBwcm9ncmFtbWVkIHRvIGdlbmVyYXRlIHgyYXBpYyBpbnRlcnJ1 cHRzPyAgSW4gcHJpbmNpcGxlLCBpZiB5b3UNCj4gZG9uJ3QgaGF2ZSBhbiBJT0FQSUMsIGFyZSB0 aGVyZSBhbnkgb3RoZXIgaXNzdWVzIHRvIGJlIGNvbnNpZGVyZWQ/ICBXaGF0DQo+IGhhcHBlbnMg aWYgeW91IGNvbmZpZ3VyZSB0aGUgTEFQSUNzIGluIHgyYXBpYyBtb2RlLCBidXQgaGF2ZSB0aGUg SU9BUElDDQo+IGRlbGl2ZXIgeGFwaWMgaW50ZXJydXB0cz8NCg0KVGhlIGtleSBpcyB0aGUgQVBJ QyBJRC4gVGhlcmUgaXMgbm8gbW9kaWZpY2F0aW9uIHRvIGV4aXN0aW5nIFBDSSBNU0kgYW5kDQpJ T0FQSUMgd2l0aCB0aGUgaW50cm9kdWN0aW9uIG9mIHgyYXBpYy4gUENJIE1TSS9JT0FQSUMgY2Fu IG9ubHkgc2VuZA0KaW50ZXJydXB0IG1lc3NhZ2UgY29udGFpbmluZyA4Yml0IEFQSUMgSUQsIHdo aWNoIGNhbm5vdCBhZGRyZXNzID4yNTUNCmNwdXMuIEludGVycnVwdCByZW1hcHBpbmcgc3VwcG9y dHMgMzJiaXQgQVBJQyBJRCBzbyBpdCdzIG5lY2Vzc2FyeSB0bw0KZW5hYmxlID4yNTUgY3B1cyB3 aXRoIHgyYXBpYyBtb2RlLg0KDQpJZiBMQVBJQyBpcyBpbiB4MmFwaWMgd2hpbGUgaW50ZXJydXB0 IHJlbWFwcGluZyBpcyBkaXNhYmxlZCwgSU9BUElDIGNhbm5vdA0KZGVsaXZlciBpbnRlcnJ1cHRz IHRvIGFsbCBjcHVzIGluIHRoZSBzeXN0ZW0gaWYgI2NwdSA+IDI1NS4NCg0KPiANCj4gT24gdGhl IG90aGVyIHNpZGUgb2YgdGhpbmdzLCB3aGF0IGlzIElHRCBwYXNzdGhyb3VnaCBnb2luZyB0byBs b29rIGxpa2UNCj4gaW4gU2t5bGFrZT8gIElzIHRoZXJlIGFueSBkZXZpY2UtbW9kZWwgaW50ZXJh Y3Rpb24gcmVxdWlyZWQgKGkuZS4gdGhlDQo+IG9wcmVnaW9uKSwgb3Igd2lsbCBpdCB3b3JrIGFz IGEgY29tcGxldGVseSBzdGFuZGFsb25lIGRldmljZT8gIFdoYXQgYXJlDQo+IHlvdXIgcGxhbnMg d2l0aCB0aGUgaW50ZXJhY3Rpb24gb2YgdmlydHVhbCBncmFwaGljcyBhbmQgc2hhcmVkIHZpcnR1 YWwNCj4gbWVtb3J5Pw0KPiANCg0KVGhlIHBsYW4gaXMgdG8gdXNlIGEgc28tY2FsbGVkIHVuaXZl cnNhbCBwYXNzLXRocm91Z2ggZHJpdmVyIGluIHRoZSBndWVzdA0Kd2hpY2ggb25seSBhY2Nlc3Nl cyBzdGFuZGFyZCBQQ0kgcmVzb3VyY2UgKHcvbyBvcHJlZ2lvbiwgUENIL01DSCwgZXRjLikNCg0K LS0tLQ0KSGVyZSBpcyBhIGJyaWVmIG9mIHBvdGVudGlhbCB1c2FnZXMgcmVseWluZyBvbiB2SU9N TVU6DQoNCmEpIGVuYWJsZSA+MjU1IHZjcHVzIG9uIFhlb24gUGhpLCBhcyB0aGUgaW5pdGlhbCBw dXJwb3NlIG9mIHRoaXMgdGhyZWFkLiANCkl0IHJlcXVpcmVzIGludGVycnVwdCByZW1hcHBpbmcg Y2FwYWJpbGl0eSBwcmVzZW50IG9uIHZJT01NVTsNCg0KYikgc3VwcG9ydCBndWVzdCBTVk0gKFNo YXJlZCBWaXJ0dWFsIE1lbW9yeSksIHdoaWNoIHJlbGllcyBvbiB0aGUNCjFzdCBsZXZlbCB0cmFu c2xhdGlvbiB0YWJsZSBjYXBhYmlsaXR5IChHVkEtPkdQQSkgb24gdklPTU1VLiBwSU9NTVUNCm5l ZWRzIHRvIGVuYWJsZSBib3RoIDFzdCBsZXZlbCBhbmQgMm5kIGxldmVsIHRyYW5zbGF0aW9uIGlu IG5lc3RlZA0KbW9kZSAoR1ZBLT5HUEEtPkhQQSkgZm9yIHBhc3N0aHJvdWdoIGRldmljZS4gSUdE IHBhc3N0aHJvdWdoIGlzDQp0aGUgbWFpbiB1c2FnZSB0b2RheSAodG8gc3VwcG9ydCBPcGVuQ0wg Mi4wIFNWTSBmZWF0dXJlKS4gSW4gdGhlDQpmdXR1cmUgU1ZNIG1pZ2h0IGJlIHVzZWQgYnkgb3Ro ZXIgSS9PIGRldmljZXMgdG9vOw0KDQpjKSBzdXBwb3J0IFZGSU8tYmFzZWQgdXNlciBzcGFjZSBk cml2ZXIgKGUuZy4gRFBESykgaW4gdGhlIGd1ZXN0LA0Kd2hpY2ggcmVsaWVzIG9uIHRoZSAybmQg bGV2ZWwgdHJhbnNsYXRpb24gY2FwYWJpbGl0eSAoSU9WQS0+R1BBKSBvbiANCnZJT01NVS4gcElP TU1VIDJuZCBsZXZlbCBiZWNvbWVzIGEgc2hhZG93aW5nIHN0cnVjdHVyZSBvZg0KdklPTU1VIDJu ZCBsZXZlbCBieSByZXBsYWNpbmcgR1BBIHdpdGggSFBBIChiZWNvbWVzIElPVkEtPkhQQSk7DQoN Ci0tLS0NCkFuZCBiZWxvdyBpcyBteSB0aG91Z2h0IHZpYWJpbGl0eSBvZiBpbXBsZW1lbnRpbmcg dklPTU1VIGluIFFlbXU6DQoNCmEpIGVuYWJsZSA+MjU1IHZjcHVzOg0KDQoJbyBFbmFibGUgUTM1 IGluIFFlbXUtWGVuOw0KCW8gQWRkIGludGVycnVwdCByZW1hcHBpbmcgaW4gUWVtdSB2SU9NTVU7 DQoJbyBWaXJ0dWFsIGludGVycnVwdCBpbmplY3Rpb24gaW4gaHlwZXJ2aXNvciBuZWVkcyB0byBr bm93IHZpcnR1YWwNCmludGVycnVwdCByZW1hcHBpbmcgKElSKSBzdHJ1Y3R1cmUsIHNpbmNlIElS IGlzIGJlaGluZCB2SU9BUElDL3ZNU0ksDQp3aGljaCByZXF1aXJlcyBuZXcgaHlwZXJ2aXNvciBp bnRlcmZhY2VzIGFzIEFuZHJldyBwb2ludGVkIG91dDoNCgkJKiBlaXRoZXIgZm9yIGh5cGVydmlz b3IgdG8gcXVlcnkgSVIgZnJvbSBRZW11IHdoaWNoIGlzIG5vdA0KZ29vZDsNCgkJKiBvciBmb3Ig UWVtdSB0byByZWdpc3RlciBJUiBpbmZvIHRvIGh5cGVydmlzb3Igd2hpY2ggbWVhbnMNCnBhcnRp YWwgSVIga25vd2xlZGdlIGltcGxlbWVudGVkIGluIGh5cGVydmlzb3IgKHRoZW4gd2h5IG5vdCBw dXR0aW5nDQp3aG9sZSBJUiBlbXVsYXRpb24gaW4gWGVuPykNCg0KYikgc3VwcG9ydCBTVk0NCg0K CW8gRW5hYmxlIFEzNSBpbiBRZW11LVhlbjsNCglvIEFkZCAxc3QgbGV2ZWwgdHJhbnNsYXRpb24g Y2FwYWJpbGl0eSBpbiBRZW11IHZJT01NVTsNCglvIFZULWQgY29udGV4dCBlbnRyeSBwb2ludHMg dG8gZ3Vlc3QgMXN0IGxldmVsIHRyYW5zbGF0aW9uIHRhYmxlDQp3aGljaCBpcyBuZXN0LXRyYW5z bGF0ZWQgYnkgMm5kIGxldmVsIHRyYW5zbGF0aW9uIHRhYmxlIHNvIHZJT01NVQ0Kc3RydWN0dXJl IGNhbiBiZSBkaXJlY3RseSBsaW5rZWQuIEl0IG1lYW5zOg0KCQkqIFhlbiBJT01NVSBkcml2ZXIg ZW5hYmxlcyBuZXN0ZWQgbW9kZTsNCgkJKiBJbnRyb2R1Y2UgYSBuZXcgaHlwZXJjYWxsIHNvIFFl bXUgdklPTU1VIGNhbiByZWdpc3Rlcg0KR1BBIHJvb3Qgb2YgZ3Vlc3QgMXN0IGxldmVsIHRyYW5z bGF0aW9uIHRhYmxlIHdoaWNoIGlzIHRoZW4gd3JpdHRlbg0KdG8gY29udGV4dCBlbnRyeSBpbiBw SU9NTVU7DQoNCmMpIHN1cHBvcnQgVkZJTy1iYXNlZCB1c2VyIHNwYWNlIGRyaXZlcg0KDQoJbyBF bmFibGUgUTM1IGluIFFlbXUtWGVuOw0KCW8gTGV2ZXJhZ2UgZXhpc3RpbmcgMm5kIGxldmVsIHRy YW5zbGF0aW9uIGltcGxlbWVudGF0aW9uIGluIFFlbXUgDQp2SU9NTVU7DQoJbyBDaGFuZ2UgWGVu IElPTU1VIHRvIHN1cHBvcnQgKElPVkEtPkhQQSkgdHJhbnNsYXRpb24gd2hpY2gNCm1lYW5zIGRl Y291cGxlIGN1cnJlbnQgbG9naWMgZnJvbSBQMk0gbGF5ZXIgKG9ubHkgZm9yIEdQQS0+SFBBKTsN CglvIEFzIGEgbWVhbnMgb2Ygc2hhZG93aW5nIGFwcHJvYWNoLCBYZW4gSU9NTVUgZHJpdmVyIG5l ZWRzIHRvDQprbm93IGJvdGggKElPVkEtPkdQQSkgYW5kIChHUEEtPkhQQSkgaW5mbyB0byB1cGRh dGUgKElPVkEtPkhQQSkNCm1hcHBpbmcgaW4gY2FzZSBvZiBhbnkgb25lIGlzIGNoYW5nZWQuIFNv IG5ldyBpbnRlcmZhY2UgaXMgcmVxdWlyZWQNCmZvciBRZW11IHZJT01NVSB0byBwcm9wYWdhdGUg KElPVkEtPkdQQSkgaW5mbyBpbnRvIFhlbiBoeXBlcnZpc29yDQp3aGljaCBtYXkgbmVlZCB0byBi ZSBmdXJ0aGVyIGNhY2hlZC4gDQoNCi0tLS0NCg0KQWZ0ZXIgd3JpdGluZyBkb3duIGFib3ZlIGRl dGFpbCwgbG9va3MgaXQncyBjbGVhciB0aGF0IHB1dHRpbmcgdklPTU1VDQppbiBRZW11IGlzIG5v dCBhIGNsZWFuIGRlc2lnbiBmb3IgYSkgYW5kIGMpLiBGb3IgYikgdGhlIGh5cGVydmlzb3INCmNo YW5nZSBpcyBub3QgdGhhdCBoYWNreSwgYnV0IGZvciBpdCBhbG9uZSBzZWVtcyBub3Qgc3Ryb25n IHRvIHB1cnN1ZQ0KUWVtdSBwYXRoLiBTZWVtcyB3ZSBtYXkgaGF2ZSB0byBnbyB3aXRoIGh5cGVy dmlzb3IgYmFzZWQgDQphcHByb2FjaC4uLg0KDQpBbnl3YXkgc3RvcCBoZXJlLiBXaXRoIGFib3Zl IGJhY2tncm91bmQgbGV0J3Mgc2VlIHdoZXRoZXIgb3RoZXJzDQptYXkgaGF2ZSBhIGJldHRlciB0 aG91Z2h0IGhvdyB0byBhY2NlbGVyYXRlIFRUTSBvZiB0aG9zZSB1c2FnZXMNCmluIFhlbi4gWGVu IG9uY2UgaXMgYSBsZWFkaW5nIGh5cGVydmlzb3IgZm9yIG1hbnkgbmV3IGZlYXR1cmVzLCBidXQN CnJlY2VudGx5IGl0IGlzIG5vdCBzdXN0YWluaW5nLiBJZiBhYm92ZSB1c2FnZXMgY2FuIGJlIGVu YWJsZWQgZGVjb3VwbGVkDQpmcm9tIEhWTWxpdGUvdmlydHVhbF9yb290X3BvcnQgZWZmb3J0LCB0 aGVuIHdlIGNhbiBoYXZlIHN0YWdlZCBwbGFuDQp0byBtb3ZlIGZhc3RlciAoZmlyc3QgZm9yIEhW TSwgbGF0ZXIgZm9yIEhWTUxpdGUpLiA6LSkNCg0KVGhhbmtzDQpLZXZpbg0KX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlz dApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK