From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans van Kranenburg Subject: Re: Clarification regarding Meltdown and 64-bit PV guests Date: Sun, 14 Jan 2018 15:15:58 +0100 Message-ID: <5A5B661E.50303@knorrie.org> References: <20180113064223.GT29360@bitfolk.com> <20180113100850.GX29360@bitfolk.com> <7e7a5432-2921-1b10-ff61-ff9c99ea5762@knorrie.org> <4ee44af2-ea60-7154-d1be-2fe062552754@oracle.com> 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 4.84_2) (envelope-from ) id 1eaj4t-0001GN-BC for xen-devel@lists.xenproject.org; Sun, 14 Jan 2018 14:16:03 +0000 In-Reply-To: <4ee44af2-ea60-7154-d1be-2fe062552754@oracle.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Dongli Zhang Cc: Andy Smith , Lars Kurth , xen-devel@lists.xenproject.org List-Id: xen-devel@lists.xenproject.org T24gMTQvMDEvMjAxOCAxNTowMCwgRG9uZ2xpIFpoYW5nIHdyb3RlOgo+IEhpIEhhbnMsCj4gCj4g T24gMDEvMTMvMjAxOCAwNzoxMiBQTSwgSGFucyB2YW4gS3JhbmVuYnVyZyB3cm90ZToKPj4gT24g MDEvMTMvMjAxOCAxMTowOCBBTSwgQW5keSBTbWl0aCB3cm90ZToKPj4+IEhpIEhhbnMsCj4+Pgo+ Pj4gT24gU2F0LCBKYW4gMTMsIDIwMTggYXQgMTA6NDM6MDNBTSArMDEwMCwgSGFucyB2YW4gS3Jh bmVuYnVyZyB3cm90ZToKPj4+PiBCeSBpbmplY3RpbmcgYSBjb3B5IG9mIGEgaHlwZXJ2aXNvciBi ZXR3ZWVuIHRoZSBvdXRlciBsZXZlbCBoeXBlcnZpc29yCj4+Pj4gKHRoYXQncyBjYWxsZWQgTDAg cmlnaHQ/KSAoaW4gSFZNIG9yIFBWSCBtb2RlKSBhbmQgdGhlIGd1ZXN0LCBoYXZpbmcgaXQKPj4+ PiBqdXN0IHJ1biAxIGd1ZXN0LCB0aGF0ICg2NC1iaXQgUFYpIGd1ZXN0IGNhbm5vdCBhdHRhY2sg aXRzIG93biBrZXJuZWwsCj4+Pj4gYnV0IGl0IGNhbiBhdHRhY2sgdGhlIGludGVybWVkaWF0ZSBo eXBlcnZpc29yIHdoaWNoIHJlc3VsdHMgaW4gcmVhZGluZwo+Pj4+IGl0J3Mgb3duIG1lbW9yeSBm cm9tIHRoZSBmYWtlIGludGVybWVkaWF0ZSAiaG9zdCBtZW1vcnkiLgo+Pj4KPj4+IFNvIGFyZSB5 b3Ugc2F5aW5nIHRoYXQsIGNvbnNpZGVyaW5nIG9ubHkgU1AzL1ZhcmlhbnQgMy9NZWx0ZG93biwg aXQKPj4+IHdvcmtzIG91dCBsaWtlIHRoaXM6Cj4+Pgo+Pj4gPT0gNjQtYml0IFBWIG1vZGUgZ3Vl c3QgPT0KPj4+Cj4+PiAtIENhbid0IHVzZSBTUDMvVmFyaWFudCAzL01lbHRkb3duIGRpcmVjdGx5 IG9uIGl0cyBvd24ga2VybmVsLgo+Pj4KPj4+IC0gQ2FuIHVzZSBTUDMvVmFyaWFudCAzL01lbHRk b3duIG9uIHRoZSBoeXBlcnZpc29yIHRvIHJlYWQgZGF0YSBmcm9tCj4+PiAgIGh5cGVydmlzb3Ig c28gZWZmZWN0aXZlbHkgZXZlcnl0aGluZyBpbmNsdWRpbmcgb3RoZXIga2VybmVscyBhbmQKPj4+ ICAgaXRzIG93biBrZXJuZWwuCj4+Pgo+Pj4gLSBDYW4ndCBiZSBtaXRpZ2F0ZWQgYnkgS1BUSSBp biB0aGUgZ3Vlc3QuCj4+Pgo+Pj4gPT0gUFYtaW4tQ29tZXQgYW5kIFBWLWluLVZpeGVuID09Cj4+ Pgo+Pj4gLSBDYW4ndCB1c2UgU1AzL1ZhcmlhbnQgMy9NZWx0ZG93biBkaXJlY3RseSBvbiBpdHMg b3duIGtlcm5lbAo+Pj4KPj4+IC0gQ2FuJ3QgdXNlIFNQMy9WYXJpYW50IDMvTWVsdGRvd24gb24g dGhlIHJlYWwgaHlwZXJ2aXNvci4KPj4+Cj4+PiAtIENhbiBzdGlsbCB1c2UgU1AzL1ZhcmlhbnQg My9NZWx0ZG93biBvbiB0aGUgc2hpbSBoeXBlcnZpc29yIHRvCj4+PiAgIHN0aWxsIGdhaW4gYWNj ZXNzIHRvIGRhdGEgZnJvbSBpdHNlbGYuCj4+Pgo+Pj4gLSBDYW4ndCBiZSBtaXRpZ2F0ZWQgYnkg S1BUSSBpbiB0aGUgZ3Vlc3QuCj4+Pgo+Pj4gPT0gSFZNIGFuZCBQVkh2MiA9PQo+Pj4KPj4+IC0g Q2FuIHVzZSBTUDMvVmFyaWFudCAzL01lbHRkb3duIGRpcmVjdGx5IG9uIGl0cyBvd24ga2VybmVs Lgo+Pj4KPj4+IC0gQ2FuJ3QgdXNlIFNQMy9WYXJpYW50IDMvTWVsdGRvd24gb24gdGhlIGh5cGVy dmlzb3IuCj4+Pgo+Pj4gLSBDYW4gYmUgbWl0aWdhdGVkIGJ5IEtQVEkgaW4gdGhlIGd1ZXN0IChi ZWNvbWVzIG5vdCBhIFhlbiBpc3N1ZSkuCj4+Pgo+Pj4gPwo+Pgo+PiBFeGFjdGx5Lgo+IAo+IERv ZXMgdGhpcyBpbmRpY2F0ZSB0aGF0IHRoZXJlIGlzIG5vIHNvbHV0aW9uIHRvIHByZXZlbnQgYSBt YWxpY2lvdXMgdXNlciBzcGFjZQo+IHByb2dyYW0gKHJ1bm5pbmcgb24gNjQtYml0IFBWIGRvbVUp IGZyb20gcmVhZGluZyB0aGUgbWVtb3J5IG9mIGRvbVUga2VybmVsIHNwYWNlCj4gKHZpYSBtZWx0 ZG93biksIG5vIG1hdHRlciB3aGV0aGVyIGNvbWV0L3ZpeGVuIGlzIGVuYWJsZWQgb3Igbm90Pwo+ IAo+IFRoZXJlZm9yZSwgY29tZXQvdml4ZW4gaXMgb25seSB1c2VkIHRvIHByZXZlbnQgdGhlIGNy b3NzLVZNIG1lbHRkb3duIGF0dGFjay4KClllcy4KCkZvciByZWZlcmVuY2UsIEkgbG9va2VkIGJh Y2sgYXQgbXkgSVJDIGxvZ3MuIFRoaXMgaXMgdGhlIHJlbGF0ZWQKY29udmVyc2F0aW9uIGFib3V0 IGl0LCAjeGVuIElSQyBvbiBmcmVlbm9kZSwgZnJvbSBKYW4gNiAyMDE4LCB3aGVuIEkgd2FzCmZp cmluZyBvZmYgcXVlc3Rpb25zIHRvIEFuZHJldy4KCjE4OjE3IDwgS25vcnJpZT4gd2l0aCBYZW4g NC44KyBhbmQgdGhlIHB2c2hpbSBtZXRob2QgZm9yIG5vbi1wdmggZ3Vlc3QKa2VybmVscywgaXMg dGhlIHhlbiBpbXBsZW1lbnRhdGlvbiB0aGF0IGRvZXMgdGhlIHNhbWUgYXMgS1BUSSBpbnNpZGUg dGhlCmd1ZXN0IGZvciA2NGJpdCBQViBzdGlsbCBwcmVzZW50PwoxODoyMCA8IGFuZHloaHA+IGht bQoxODoyMCA8IEtub3JyaWU+IEkgdGhpbmsgdGhhdCdzIGFuIGludGVyZXN0aW5nIHF1ZXN0aW5v IDopCjE4OjIwIDwgYW5keWhocD4gdGhlIDY0Yml0IFBWIEFCSSBhbHJlYWR5IGhhcyBhbiBpc29s YXRpb24gYmV0d2VlbiBndWVzdAp1c2Vyc3BhY2UgYW5kIGd1ZXN0IGtlcm5lbAoxODoyMCA8IGFu ZHloaHA+IHNvIGluIGVmZmVjdCwgaGFzIGhhZCBLUFRJIGZvciAxMiB5ZWFycyBhbHJlYWR5Li4u CjE4OjIxIDwgYW5keWhocD4gaG93ZXZlcgoxODoyMSA8IGFuZHloaHA+IFhlbidzIG1hcHBpbmdz IGFyZSBub3QgY3VycmVudGx5IGlzb2xhdGVkLCBzbyBlaXRoZXIKZ3Vlc3QgdXNlcnNwYWNlIG9y IGd1ZXN0IGtlcm5lbCBjYW4gYXR0YWNrIFhlbiB1c2luZyBTUDMvTWVsdGRvd24KMTg6MjIgPCBL bm9ycmllPiB5ZXMsIGFzIEkgdW5kZXJzdG9vZCB0aGUgcmVhc29uIG9mIHRoZSBwdnNoaW0gZmVh dHVyZQp3YXMgdG8gZml4IGV4YWN0bHkgdGhhdAoxODoyMyA8IGFuZHloaHA+IHRoZSBMaW51eCBL UFRJIGZlYXR1cmUgc2hvdWxkIHR1cm4gaXRzZWxmIG9mZiB3aGVuIGl0CmRldGVjdHMgaXQgaXMg cnVubmluZyBhcyBhIFBWIGd1ZXN0IHVuZGVyIFhlbgoxODoyNCA8IGFuZHloaHA+IGJ1dCB0aGlz IHdhcyBxdWl0ZSBsYXRlIHRvIHRoZSBwYXJ0eSwgYW5kIGl0IGFwcGVhcnMKdGhhdCBSZWRoYXQg aGF2ZSBwdWJsaXNoZWQgYW4gdXBkYXRlIHRvIFJIRUwgNi54IHdoaWNoIGJyaWNrcyBQViBndWVz dHMgOigKMTg6MjQgPCBLbm9ycmllPiBhaCByaWdodCwgSSByZW1lbWJlciBoYXZpbmcgc2VlbiB0 aGF0IGlmIHN0YXRlbWVudCBvbmUKb2YgdGhlc2UgZGF5cyB5ZXMKMTg6MjQgPCBLbm9ycmllPiBz byBubyBuZWVkIHRvIG1hbnVhbGx5IHR1cm4gIGl0IG9mZiBpbiBleGFjdGx5IHRoYXQKc2NlbmFy aW8KMTg6MjYgPCBhbmR5aGhwPiB0aGUgUFYtc2hpbSBkb2Vzbid0IGRvIGFueXRoaW5nIGNsZXZl cgoxODoyNiA8IGFuZHloaHA+IGFsbCB3ZSBkbyBpcyBzdGljayBhIHNlY29uZCB2ZXJzaW9uIG9m IFhlbiBpbiB0aGVyZQoxODoyNiA8IGFuZHloaHA+IHNvIHdlJ3ZlIGdvdCBMMCBYZW4gcnVubmlu ZyBhIFBWSCBndWVzdCAoc28gaW4gYW4gSFZNCmNvbnRhaW5lcikuCjE4OjI2IDwgYW5keWhocD4g dGhhdCBQVkggZ3Vlc3QgaXMgYWN0dWFsbHkgYSBYZW4gcnVubmluZyBhIHNpbmdsZQpsZWdhY3kg UFYgZ3Vlc3QKMTg6MjcgPCBLbm9ycmllPiB3ZWxsLCB0aGUgY2xldmVyIHRoaW5ncyBpcyB0aGF0 IHlvdSBjYW4ndCBzZWUgb3V0c2lkZQpvZiB5b3VyIG93biBtZW1vcnkgYW55IG1vcmUgcmlnaHQK MTg6MjcgPCBLbm9ycmllPiBzL3RoaW5ncy90aGluZy8KMTg6MjcgPCBhbmR5aGhwPiB0aGUgYWx0 ZXJhdGlvbiBpcy9zaG91bGQvd2lsbCBiZSB0cmFuc3BhcmVudCBmcm9tIHRoZQpwb2ludCBvZiB2 aWV3IG9mIHRoZSBsZWdhY3kgUFYgZ3Vlc3QKMTg6MjggPCBhbmR5aGhwPiB0aGUgbGVnYWN5IFBW IGd1ZXN0IGNhbiBzdGlsbCBhdHRlbXB0IHRvIHB1bGwgb2ZmClNQMy9NZWx0ZG93biBhdHRhY2tz LCBidXQgdGhleSBzdG9wIGF0IHRoZSBMMSBYZW4KMTg6MjkgPCBhbmR5aGhwPiBzbyBhbGwgaXQg Y2FuIGRvIGlzIGRvIGlzIHJlYWQgZGV0YWlscyByZWxhdGluZyB0bwppdHNlbGYuICBJdCBjYW4n dCByZWFkIGFueXRoaW5nIGJlbG9uZ2luZyB0byBvdGhlciBWTXMKMTg6MjkgPCBLbm9ycmllPiBs aWtlLCBvdXRnb2luZyBuZXR3b3JrIHRyYWZmaWMgZnJvbSBvdGhlciBwcm9jZXNzZXMgb24KdGhl IHNhbWUgZ3Vlc3Q/CjE4OjI5IDwgS25vcnJpZT4gKHJlZ2FyZGxlc3Mgb2YgaG93IHByYWN0aWNh bCBhbmQgcmVhbGlzdGljIHRob3NlCmF0dGFja3MgYXJlKQoKLS0tLSA+OCAtLS0tCgoxODozMCA8 IGFuZHloaHA+IGl0IHNob3VsZCBiZSBub3RlZCB0aGF0IFBWLVNISU0gaXNuJ3QgYSBwZXJmZWN0 CnJlcGxhY2VtZW50IGZvciBzb21lIGtpbmQgb2YgWGVuIGJhc2VkIEtQVEkgc29sdXRpb24uICBB IHBpZWNlIG9mCnVzZXJzcGFjZSBpbnNpZGUgdGhlIFBWIGd1ZXN0IGNhbiBzdGlsbCB1c2UgU1Az IHRvIGF0dGFjayBvdGhlCnIgcHJvY2Vzc2VzIGJ5IGJ5cGFzc2luZyB0aGUgUFYgZ3Vlc3Qga2Vy bmVsIGFuZCBhdHRhY2tpbmcgdmlhIEwxIFhlbgoxODozMCA8IGFuZHloaHA+IGJ1dCB0aGF0IGlz IGEgZGFybiBzaWdodCBiZXR0ZXIgdGhhbiBoYXZpbmcgc2FpZCBwaWVjZQpvZiBQViBndWVzdCB1 c2Vyc3BhY2UgYmVpbmcgYWJsZSB0byByZWFkIGV2ZXJ5IFZNIG9uIHRoZSBlbnRpcmUgc3lzdGVt CgotLS0tID44IC0tLS0KCjE4OjMxIDwgS25vcnJpZT4geWVzCjE4OjMyIDwgYW5keWhocD4gaG93 ZXZlciwgSSd2ZSBjb21lIHRvIHRoZSBleGVjdXRpdmUgZGVjaXNpb24gdGhhdCBYZW4KY2FuJ3Qg ZG8gc29tZSBraW5kIG9mIEtQVEktYmFzZWQgc29sdXRpb24gd2l0aG91dCBhIGNoYW5nZSBpbiB0 aGUgUFYgQUJJCjE4OjMyIDwgYW5keWhocD4gYmVjYXVzZSBQViBndWVzdHMgY3VycmVudGx5IGhh dmUgdG9vIG11Y2ggY29udHJvbCBvdmVyCnRoZWlyIHBhZ2V0YWJsZXMgZm9yIFhlbiB0byBpbXBs ZW1lbnQgS1BUSSBiZWhpbmQgdGhlbQoxODozNCA8IEtub3JyaWU+IHNvdW5kcyBsaWtlIHRoaXMg aXMgdGhlIG1vbWVudCB3aGVuIFBWIGlzIGdvaW5nIHRvIGJlCmRlY2xhcmVkIGRlYWQKMTg6MzQg PCBLbm9ycmllPiB3ZWxsCjE4OjM0IDwgS25vcnJpZT4gb2YgY291cnNlIHRoZXJlJ3MgaGFyZHdh cmUgdGhhdCBjYW5ub3QgZG8gUFZICjE4OjM1IDwgS25vcnJpZT4gYnV0IEkgbWVhbiwgZm9yIHdo byBjYW4gZG8gUFZIIHdoZW5ldmVyIHRoZXkncmUgdXBkYXRlZAp0byByZWNlbnQgZ3Vlc3Qga2Vy bmVscyB0aGUgY2hhbmdlcyB3b3VsZCBjb21lIGV2ZW4gbGF0ZXIgYWdhaW4sIHNvIGZvcgp0aGVt IGl0J3MgdGhlIFBWSCB3YXkKMTg6MzYgPCBLbm9ycmllPiBhbmQgUFYgcmVtYWlucyBoYWxmLWJy b2tlbiBmb3IgYSBsb25nZXIgdGltZSBmb3Igd2hvIGNhbnQKMTg6MzYgPCBhbmR5aGhwPiBQViBp c24ndCBkZWFkIGJ5IGFueSBtZWFucywgYW5kIEknbSBnb2luZyB0byByZWZ1c2UgdG8KZGVjbGFy ZSBpdCBzbwoxODozNyA8IGFuZHloaHA+IHRoZXJlIGFyZSBzdGlsbCBsZWdpdGltYXRlIChhbmQg aW5kZWVkLCBtb2Rlcm4pCnVzZWNhc2VzIHdoZXJlIFBWIGd1ZXN0cyB3aWxsIHVuY29uZGl0aW9u YWxseSBhbHdheXMgb3V0cGVyZm9ybSBIVk0gZ3Vlc3RzCjE4OjM4IDwgYW5keWhocD4gYnV0IGFs bCBzdWNoIHVzZWNhc2VzIGhhdmUgdGhlIFBWIGd1ZXN0cyBhdCBsZWFzdCBpbgp0aGUgc2VtaS1U Q0IKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1k ZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8v bGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=