From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH RFC] xen: prevent PVH Dom0 from having pages with more than one ref Date: Fri, 13 Jun 2014 10:23:53 +0100 Message-ID: <539AC329.3050109@citrix.com> References: <1402650748-61744-1-git-send-email-roger.pau@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1WvNiJ-0007xs-Of for xen-devel@lists.xenproject.org; Fri, 13 Jun 2014 09:24:00 +0000 In-Reply-To: <1402650748-61744-1-git-send-email-roger.pau@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Roger Pau Monne Cc: xen-devel@lists.xenproject.org, Keir Fraser , Jan Beulich List-Id: xen-devel@lists.xenproject.org T24gMTMvMDYvMTQgMTA6MTIsIFJvZ2VyIFBhdSBNb25uZSB3cm90ZToKPiBXaXRoIHRoZSBjdXJy ZW50IGltcGxlbWVudGF0aW9uIG9mIHRoZSBEb20wIGRvbWFpbiBidWlsZGVyIGEgUFZIIERvbTAK PiBlbmRzIHVwIHdpdGggcGFnZXMgdGhhdCBoYXZlIDIgcmVmZXJlbmNlcywgd2hpY2ggbWVhbnMg dGhleSBhcmUgbm90Cj4gZnJlZWQgd2hlbiBEb20wIGJhbGxvb25zIG1lbW9yeSBkb3duLiBUaGlz IGxlYWRzIHRvIHRob3NlIHBhZ2VzCj4gbm90IGJlaW5nIGZyZWVkIGluIGd1ZXN0X3JlbW92ZV9w YWdlLCBzbyB0aGV5IGFyZSBsZWFrZWQgYW5kIHRoZQo+IG1lbW9yeSBhY2NvdW50aW5nIGJldHdl ZW4gWGVuIGFuZCBEb20wIGRpZmZlcnMsIGJlY2F1c2UgRG9tMCBPUwo+IGFjdHVhbGx5IHRoaW5r cyB0aGV5IGFyZSBmcmVlZCwgYnV0IGQtPnRvdF9wYWdlcyBpcyBub3QgZGVjcmVhc2VkLgo+Cj4g U2lnbmVkLW9mZi1ieTogUm9nZXIgUGF1IE1vbm7DqSA8cm9nZXIucGF1QGNpdHJpeC5jb20+Cj4g Q2M6IEtlaXIgRnJhc2VyIDxrZWlyQHhlbi5vcmc+Cj4gQ2M6IEphbiBCZXVsaWNoIDxqYmV1bGlj aEBzdXNlLmNvbT4KPiBDYzogTXVrZXNoIFJhdGhvciA8bXVrZXNoLnJhdGhvckBvcmFjbGUuY29t Pgo+IC0tLQoKSW4gd2hpY2ggc2NlbmFyaW9zIGRvIHBhZ2VzIGdldCB0d28gcmVmcywgYW5kIHdo eSBkbyB5b3UgY29uc2lkZXIgdGhpcwp0byBiZSB2YWxpZD8KCihPciBpbiBvdGhlciB3b3Jkcywg bXkgZ3V0IGZlZWwgaXMgdGhhdCB0aGlzIHBhdGNoIGlzIHdyb25nLCBidXQgdGhlcmUKaXMgaW5z dWZmaWNpZW50IGluZm9ybWF0aW9uIHRvIGRlY2lkZSBvbmUgd2F5IG9yIGFub3RoZXIuKQoKfkFu ZHJldwoKPiAgeGVuL2FyY2gveDg2L2RvbWFpbl9idWlsZC5jIHwgICAxMCArKysrKystLS0tCj4g IDEgZmlsZXMgY2hhbmdlZCwgNiBpbnNlcnRpb25zKCspLCA0IGRlbGV0aW9ucygtKQo+Cj4gZGlm ZiAtLWdpdCBhL3hlbi9hcmNoL3g4Ni9kb21haW5fYnVpbGQuYyBiL3hlbi9hcmNoL3g4Ni9kb21h aW5fYnVpbGQuYwo+IGluZGV4IGJhNDJmYzkuLjcwNzNkYWMgMTAwNjQ0Cj4gLS0tIGEveGVuL2Fy Y2gveDg2L2RvbWFpbl9idWlsZC5jCj4gKysrIGIveGVuL2FyY2gveDg2L2RvbWFpbl9idWlsZC5j Cj4gQEAgLTExMzcsMTAgKzExMzcsMTIgQEAgaW50IF9faW5pdCBjb25zdHJ1Y3RfZG9tMCgKPiAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgTDFfUFJPVCA6IENPTVBBVF9MMV9Q Uk9UKSk7Cj4gICAgICAgICAgbDF0YWIrKzsKPiAgCj4gLSAgICAgICAgcGFnZSA9IG1mbl90b19w YWdlKG1mbik7Cj4gLSAgICAgICAgaWYgKCAocGFnZS0+dS5pbnVzZS50eXBlX2luZm8gPT0gMCkg JiYKPiAtICAgICAgICAgICAgICFnZXRfcGFnZV9hbmRfdHlwZShwYWdlLCBkLCBQR1Rfd3JpdGFi bGVfcGFnZSkgKQo+IC0gICAgICAgICAgICBCVUcoKTsKPiArICAgICAgICBpZiAoICFpc19wdmhf ZG9tYWluKGQpICkgewo+ICsgICAgICAgICAgICBwYWdlID0gbWZuX3RvX3BhZ2UobWZuKTsKPiAr ICAgICAgICAgICAgaWYgKCAocGFnZS0+dS5pbnVzZS50eXBlX2luZm8gPT0gMCkgJiYKPiArICAg ICAgICAgICAgICAgICAhZ2V0X3BhZ2VfYW5kX3R5cGUocGFnZSwgZCwgUEdUX3dyaXRhYmxlX3Bh Z2UpICkKPiArICAgICAgICAgICAgICAgIEJVRygpOwo+ICsgICAgICAgIH0KPiAgICAgIH0KPiAg Cj4gICAgICBpZiAoIGlzX3B2XzMyb242NF9kb21haW4oZCkgKQoKCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVu LWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==