From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergej Proskurin Subject: Re: [RFC PATCH v2 5/8] arm/mem_access: Add software guest-page-table walk Date: Thu, 8 Jun 2017 14:43:47 +0200 Message-ID: <0da289b1-e2ef-672e-3a3d-0ac86fc1d663@sec.in.tum.de> References: <20170601151906.10213-1-proskurin@sec.in.tum.de> <20170601151906.10213-6-proskurin@sec.in.tum.de> <3a019bbf-6ebe-85b0-4d97-90ccb6295035@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dIwn6-0006gz-2y for xen-devel@lists.xenproject.org; Thu, 08 Jun 2017 12:43:56 +0000 In-Reply-To: <3a019bbf-6ebe-85b0-4d97-90ccb6295035@arm.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: Julien Grall , xen-devel@lists.xenproject.org Cc: Stefano Stabellini List-Id: xen-devel@lists.xenproject.org SGkgSnVsaWVuLAoKWy4uLl0KCj4gSSBrbm93IEkgc3VnZ2VzdGVkIHRvIG1vdmUgaW4gcDJtLmMu IExvb2tpbmcgYXQgdGhlIGRpZmYgc3RhdCwgdGhpcwo+IHdpbGwgaW5jcmVhc2UgcXVpdGUgYSBs b3QgcDJtLmMgd2hpY2ggaXMgYWxyZWFkeSBiaWcuCj4KPiBIb3cgYWJvdXQgaW50cm9kdWNpbmcg YSBmaWxlIGd1ZXN0X3dhbGsuYyB3aGljaCBjb250YWluIHRoZSBuZXcKPiBmdW5jdGlvbnM/Cj4K Ck5vIHByb2JsZW0gYXQgYWxsLiBJIHdpbGwgZ2xhZGx5IG1vdmUgdGhlIGZ1bmN0aW9uYWxpdHkg aW50byBhIHNlcGFyYXRlCmZpbGUuCgo+Cj4+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAg IHZhZGRyX3QgZ3ZhLCBwYWRkcl90ICppcGEsCj4+ICsgICAgICAgICAgICAgICAgICAgICAgICAg ICAgIHVuc2lnbmVkIGludCAqcGVybV9ybykKPgo+IEkgYW0gYSBiaXQgY29uZnVzZWQgd2l0aCBw ZXJtX3JvLiBXaWxsIHlvdSBvbmx5IHJldHVybiAwLzE/IElmIHNvIGl0Cj4gc2hvdWxkIGJlIGEg Ym9vbC4KPgo+IEJ1dCB3ZSBsaWtlbHkgd2FudCB0byBrbm93IG1vcmUgcGVybWlzc2lvbiBzdWNo IGFzIHRoZSBleGVjdXRpb24gYml0Li4uCj4KClllcywgSSBhZ3JlZSB0aGF0IHdlIHNob3VsZCBy ZXR1cm4gbW9yZSBwZXJtaXNzaW9ucyBiYWNrIHRvIHRoZSBjYWxsZXIuCkkgc3VnZ2VzdCB0aGF0 IHdlIGFncmVlIG9uIHJlcXVpcmVkIHBlcm1pc3Npb25zIGF0IHRoaXMgcG9pbnQsIGFzIGRvIG5v dApvbmx5IGhhdmUgdGhlIGV4ZWN1dGlvbiBiaXQgKCFYTikgYnV0IGFsc28gd2UgZGlzdGluZ3Vp c2ggYmV0d2VlbiB0aGUKUHJpdmlsZWdlZCBYTiAoUFhOKSBiaXQgaW4gdGhlIGxvbmctZGVzY3Jp cHRvciBmb3JtYXQsIGFzIHdlbGwgYXMgdGhlCmFjY2VzcyBwZXJtaXNzaW9ucyBiaXRzIChBUFsy OnhdKSwgd2hpY2ggaW5mb3JtIHdoaWNoIEVML1BMIGlzIGFsbG93ZWQKdG8gYWNjZXNzIChSV1gp IHRoZSBwYXJ0aWN1bGFyIG1lbW9yeSByZWdpb24uCgpPciBkbyB5b3UgdGhpbmsgcmV0dXJuaW5n IGFuIGFkZGl0aW9uYWwgZXhlY3V0ZSBiaXQgKCFYTikgd291bGQgc3VmZmljZQpmb3Igbm93LCBh cyB3ZSBkb24ndCByZWFsbHkgY2FyZSBhYm91dCBleGVjdXRpb24gcGVybWlzc2lvbnMgYXQKZGlm ZmVyZW50IEVMJ3MvUEwncyBhdCB0aGlzIHBvaW50PwoKPgo+Cj4gVGhlIG5hbWUgZ3B0IGlzIG5v dCB2ZXJ5IHVzZWQgaW4gWGVuIGFuZCB3b3VsZCBwcmVmZXIgYSBjbGVhcmVyIG5hbWUKPiBzdWNo IGFzIHRoZSB4ODYgb25lICJndWVzdF93YWxrX3RhYmxlcyIuCgpTb3VuZHMgZ29vZCB0byBtZS4g SSBoYXZlIGNoYW5nZWQgdGhlIG5hbWVzIHRvIGd1ZXN0X3dhbGtfKHRhYmxlc3xzZHxsZCkuCgo+ Cj4+ICsgICAgICAgICAgICAgICAgIHBhZGRyX3QgKmlwYSwgdW5zaWduZWQgaW50ICpwZXJtX3Jv KQo+PiArewo+PiArICAgIHVpbnQzMl90IHNjdGxyID0gUkVBRF9TWVNSRUcoU0NUTFJfRUwxKTsK Pj4gKyAgICByZWdpc3Rlcl90IHRjciA9IFJFQURfU1lTUkVHKFRDUl9FTDEpOwo+PiArI2lmZGVm IENPTkZJR19BUk1fNjQKPj4gKyAgICBzdHJ1Y3QgZG9tYWluICpkID0gcDJtLT5kb21haW47Cj4+ ICsjZW5kaWYKPgo+IFRoZSBvbmx5IHBsYWNlIHVzZSAqZCBpcyBpbiB0aGUgaXNfMzJiaXRfZG9t YWluLCBzbyBubyBuZWVkIHRvIGFkZAo+IHNvbWUgI2lmZGVmIGFuZCBkZWZpbmUgdGhlIHZhcmlh YmxlLgo+CgpbLi4uXQoKPj4gKwo+PiArI2lmZGVmIENPTkZJR19BUk1fNjQKPj4gKyAgICBpZiAo IGlzXzMyYml0X2RvbWFpbihkKSApCj4+ICsjZW5kaWYKPgo+IGlzXzMyYml0X2RvbWFpbiBleGlz dHMgZm9yIDMyLWJpdCBYZW4uIFNvIG5vdCBuZWVkIHRvIGhhdmUgdGhpcyAjaWZkZWYuCj4KClRy dWUuIFRoZSByZWFzb24gZm9yIHRoaXMgI2lmZGVmIGlzIHRoYXQgc2luY2UgaXNfMzJiaXRfZG9t YWluKGQpCnJlc29sdmVzIHRvIGEgKDEpIG9uIEFSTXY3LCB0aGUgY29tcGlsZXIgY29tcGxhaW5l ZCBhYm91dCB0aGUgZmFjdCB0aGF0CnRoZSB2YXJpYWJsZSBzdHJ1Y3QgZG9tYWluICpkIHdhcyBu b3QgdXNlZC4gVG8gcmVzb2x2ZSB0aGlzLCBJIGNhbgpzaW1wbHkgdXNlIHAybS0+ZG9tYWluIGF0 IHRoaXMgcG9pbnQgYW5kIHJlbW92ZSB0aGUgbG9jYWwgdmFyaWFibGUKY29tcGxldGVseS4gQWx0 ZXJuYXRpdmVseSwgSSBjb3VsZCB1c2Ugc3RydWN0IGRvbWFpbiAqZCBhcyBhIGZ1bmN0aW9uCnBh cmFtZXRlciBpbnN0ZWFkIG9mIHN0cnVjdCBwMm1fZG9tYWluICpwMm0uIEkgYmVsaWV2ZSBpdCB3 b3VsZCBiZQpjbGVhbmVyIHRvIHByb3ZpZGUgdGhlIGRvbWFpbiBpbnN0ZWFkIG9mIHRoZSBwMm0g YXMgcGFyYW1ldGVyLCBhcyB3ZQpkb24ndCByZWFsbHkgbmVlZCB0aGUgcDJtLiBXaGF0IHdvdWxk IHlvdSBwcmVmZXI/CgpDaGVlcnMsCn5TZXJnZWoKCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBs aXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK