From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH 1/2] xen/arm32: Introduce alternative runtime patching Date: Fri, 24 Mar 2017 10:48:29 +0000 Message-ID: References: <1489658019-22486-1-git-send-email-Wei.Chen@arm.com> <1489658019-22486-2-git-send-email-Wei.Chen@arm.com> <077fcef2-7b3f-ebba-331b-35651b0cba5b@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Wei Chen , Xen-devel Cc: "sstabellini@kernel.org" , "ross.lagerwall@citrix.com" , Kaly Xin , nd , Steve Capper List-Id: xen-devel@lists.xenproject.org T24gMDMvMTcvMjAxNyAwNjozNSBBTSwgV2VpIENoZW4gd3JvdGU6Cj4gSGkgSnVsaWVuLAoKSGkg V2VpLAoKU29ycnkgZm9yIHRoZSBsYXRlIGFuc3dlciwgSSBtaXNzZWQgdGhhdCBlLW1haWwuCgo+ IE9uIDIwMTcvMy8xNyA2OjI0LCBKdWxpZW4gR3JhbGwgd3JvdGU6Cj4+IE9uIDAzLzE2LzIwMTcg MDk6NTMgQU0sIFdlaSBDaGVuIHdyb3RlOgoKWy4uLl0KCj4+PiArLyoKPj4+ICsgKiBEZWNvZGUg dGhlIGJyYW5jaCBvZmZzZXQgZnJvbSBhIGJyYW5jaCBpbnN0cnVjdGlvbidzIGltbSBmaWVsZC4K Pj4+ICsgKiBUaGUgYnJhbmNoIG9mZnNldCBpcyBhIHNpZ25lZCB2YWx1ZSwgc28gaXQgY2FuIGJl IHVzZWQgdG8gY29tcHV0ZQo+Pj4gKyAqIGEgbmV3IGJyYW5jaCB0YXJnZXQuCj4+PiArICovCj4+ PiAraW50MzJfdCBhYXJjaDMyX2dldF9icmFuY2hfb2Zmc2V0KHVpbnQzMl90IGluc24pCj4+PiAr ewo+Pj4gKyAgICB1aW50MzJfdCBpbW07Cj4+PiArCj4+PiArICAgIC8qIFJldHJpZXZlIGltbSBm cm9tIGJyYW5jaCBpbnN0cnVjdGlvbi4gKi8KPj4+ICsgICAgaW1tID0gKCBpbnNuID4+IEJSQU5D SF9JTlNOX0lNTV9TSElGVCApICYgQlJBTkNIX0lOU05fSU1NX01BU0s7Cj4+PiArCj4+PiArICAg IC8qCj4+PiArICAgICAqIENoZWNrIHRoZSBpbW0gc2lnbmVkIGJpdC4gSWYgdGhlIGltbSBpcyBh IG5lZ2F0aXZlIHZhbHVlLCB3ZQo+Pj4gKyAgICAgKiBoYXZlIHRvIGV4dGVuZCB0aGUgaW1tIHRv IGEgZnVsbCAzMiBiaXQgbmVnYXRpdmUgdmFsdWUuCj4+PiArICAgICAqLwo+Pj4gKyAgICBpZiAo IGltbSAmIEJJVCgyMykgKQo+Pj4gKyAgICAgICAgaW1tIHw9IEdFTk1BU0soMzEsIDI0KTsKPj4+ ICsKPj4+ICsgICAgcmV0dXJuIChpbnQzMl90KShpbW0gPDwgMik7Cj4+PiArfQo+Pj4gKwo+Pj4g Ky8qCj4+PiArICogRW5jb2RlIHRoZSBkaXNwbGFjZW1lbnQgb2YgYSBicmFuY2ggaW4gdGhlIGlt bSBmaWVsZCBhbmQgcmV0dXJuIHRoZQo+Pj4gKyAqIHVwZGF0ZWQgaW5zdHJ1Y3Rpb24uCj4+PiAr ICovCj4+PiArdWludDMyX3QgYWFyY2gzMl9zZXRfYnJhbmNoX29mZnNldCh1aW50MzJfdCBpbnNu LCBpbnQzMl90IG9mZnNldCkKPj4+ICt7Cj4+PiArICAgIGlmICggb2Zmc2V0ICYgMHgzICkKPj4+ ICsgICAgewo+Pj4gKyAgICAgICAgcHJpbnRrKFhFTkxPR19FUlIKPj4+ICsgICAgICAgICAgICAg ICAiJXM6IEFSTTMyIGluc3RydWN0aW9ucyBtdXN0IGJlIHdvcmQgYWxpZ25lZC5cbiIsIF9fZnVu Y19fKTsKPj4KPj4gVGhpcyBlcnJvciBtZXNzYWdlIGxvb2tzIHdyb25nIHRvIG1lLiBUaGUgb2Zm c2V0IGlzIG5vdCBhbiBpbnN0cnVjdGlvbi4KPj4gQnV0IGRvIHdlIHJlYWxseSBjYXJlIGFib3V0 IGNoZWNraW5nIHRoYXQgb2Zmc2V0IGlzIGFsaWduZWQgdG8gNC1iaXQ/Cj4+IEFmdGVyIGFsbCB3 ZSB3aWxsIHNoaWZ0IHRoZSB2YWx1ZSBsYXRlciBvbi4KPj4KPgo+IEkgdGhpbmsgd2UgbXVzdCBj YXJlIGFib3V0IHRoZSBvZmZzZXQgYWxpZ25tZW50LiBFdmVuIHRob3VnaCB3ZSB3aWxsCj4gc2hp ZnQgdGhlIGxhc3QgdHdvIGJpdHMgbGF0ZXIgb24uIEJ1dCBhIHVuYWxpZ25lZCBvZmZzZXQgaXRz ZWxmCj4gaW5kaWNhdGVzIHNvbWUgcHJvYmxlbXMgKENvbXBpbGVyIGlzc3VlIG9yIHRhcmdldCBv ZmZzZXQgY2FsY3VsYXRlIGJ1ZykuCj4gSWYgd2UgaWdub3JlIGl0LCB3ZSB3aWxsIGlnbm9yZSBz b21lIHBvdGVudGlhbCBwcm9ibGVtcy4KCkkgZG9uJ3QgdGhpbmsgdGhpcyBpcyByZWFsbHkgaW1w b3J0YW50LiBJIGxvb2tlZCBhdCB0aGUgQVJNNjQgCmNvdW50ZXJwYXJ0IChzZWUgYWFyY2g2NF9z ZXRfYnJhbmNoX29mZnNldCkgYW5kIHdlIGRvbid0IGRvIHRoZSBjaGVjay4KCj4KPiBBYm91dCB0 aGUgbWVzc2FnZSBjYW4gd2UgY2hhbmdlIHRvOgo+ICJUYXJnZXQgQVJNMzIgaW5zdHJ1Y3Rpb25z IG11c3QgYmUgcGxhY2VkIG9uIHdvcmQgYWxpZ25lZCBhZGRyZXNzZXM/IgoKVGhhdCB3b3VsZCBi ZSBvay4KCgpbLi4uXQoKPj4+ICAvKgo+Pj4gZGlmZiAtLWdpdCBhL3hlbi9pbmNsdWRlL2FzbS1h cm0vYXJtMzIvaW5zbi5oIGIveGVuL2luY2x1ZGUvYXNtLWFybS9hcm0zMi9pbnNuLmgKPj4+IG5l dyBmaWxlIG1vZGUgMTAwNjQ0Cj4+PiBpbmRleCAwMDAwMDAwLi4wNDVhY2MzCj4+PiAtLS0gL2Rl di9udWxsCj4+PiArKysgYi94ZW4vaW5jbHVkZS9hc20tYXJtL2FybTMyL2luc24uaAo+Pj4gQEAg LTAsMCArMSw1NyBAQAo+Pj4gKy8qCj4+PiArICAqIENvcHlyaWdodCAoQykgMjAxNyBBUk0gTHRk Lgo+Pj4gKyAgKgo+Pj4gKyAgKiBUaGlzIHByb2dyYW0gaXMgZnJlZSBzb2Z0d2FyZTsgeW91IGNh biByZWRpc3RyaWJ1dGUgaXQgYW5kL29yIG1vZGlmeQo+Pj4gKyAgKiBpdCB1bmRlciB0aGUgdGVy bXMgb2YgdGhlIEdOVSBHZW5lcmFsIFB1YmxpYyBMaWNlbnNlIHZlcnNpb24gMiBhcwo+Pj4gKyAg KiBwdWJsaXNoZWQgYnkgdGhlIEZyZWUgU29mdHdhcmUgRm91bmRhdGlvbi4KPj4+ICsgICoKPj4+ ICsgICogVGhpcyBwcm9ncmFtIGlzIGRpc3RyaWJ1dGVkIGluIHRoZSBob3BlIHRoYXQgaXQgd2ls bCBiZSB1c2VmdWwsCj4+PiArICAqIGJ1dCBXSVRIT1VUIEFOWSBXQVJSQU5UWTsgd2l0aG91dCBl dmVuIHRoZSBpbXBsaWVkIHdhcnJhbnR5IG9mCj4+PiArICAqIE1FUkNIQU5UQUJJTElUWSBvciBG SVRORVNTIEZPUiBBIFBBUlRJQ1VMQVIgUFVSUE9TRS4gIFNlZSB0aGUKPj4+ICsgICogR05VIEdl bmVyYWwgUHVibGljIExpY2Vuc2UgZm9yIG1vcmUgZGV0YWlscy4KPj4+ICsgICoKPj4+ICsgICog WW91IHNob3VsZCBoYXZlIHJlY2VpdmVkIGEgY29weSBvZiB0aGUgR05VIEdlbmVyYWwgUHVibGlj IExpY2Vuc2UKPj4+ICsgICogYWxvbmcgd2l0aCB0aGlzIHByb2dyYW0uICBJZiBub3QsIHNlZSA8 aHR0cDovL3d3dy5nbnUub3JnL2xpY2Vuc2VzLz4uCj4+PiArICAqLwo+Pj4gKyNpZm5kZWYgX19B UkNIX0FSTV9BUk0zMl9JTlNOCj4+PiArI2RlZmluZSBfX0FSQ0hfQVJNX0FSTTMyX0lOU04KPj4+ ICsKPj4+ICsjaW5jbHVkZSA8eGVuL3R5cGVzLmg+Cj4+PiArCj4+PiArI2RlZmluZSBfX0FBUkNI MzJfSU5TTl9GVU5DUyhhYmJyLCBtYXNrLCB2YWwpICAgXAo+Pj4gK3N0YXRpYyBhbHdheXNfaW5s aW5lIGJvb2xfdCBhYXJjaDMyX2luc25faXNfIyNhYmJyKHVpbnQzMl90IGNvZGUpIFwKPj4+ICt7 ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICBcCj4+PiArICAgIHJldHVybiAoY29kZSAmIChtYXNrKSkgPT0gKHZhbCk7ICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgXAo+Pj4gK30KPj4+ICsKPj4+ICtfX0FBUkNIMzJfSU5T Tl9GVU5DUyhiLCAgMHgwRjAwMDAwMCwgMHgwQTAwMDAwMCkKPj4KPj4gTG9va2luZyBhdCB0aGUg QVJNIEFSTSAoQTguOC4xOCBpbiBEREk0MDZDLmMpIHdoZW4gY29uZCA9IDBiMTExMSwgdGhpcwo+ PiB3aWxsIGJlIGEgYnguIFRoYW5rZnVsbHkgd2UgYWxzbyB3YW50IHRvIGNhdGNoIHRoZW0uCj4+ Cj4+IEkgdGhpbmsgdGhpcyBuZWVkcyB0byBiZSBzcGVsbGVkIG91dCBpbiB0aGUgY29kZSB0byBo ZWxwIHRoZSByZWFkZXIKPj4gdW5kZXJzdGFuZCBob3cgYnggaXMgaGFuZGxlZC4KPj4KPgo+IFNv cnJ5LCBJIGFtIG5vdCB2ZXJ5IGNsZWFyIGFib3V0IHRoaXMgY29tbWVudC4gSSByZWFkIHRoZSAo QTUuNyBpbgo+IERESTQwNkMuYykgYW5kIGNvdWxkIG5vdCBmaW5kIGJ4IHVuY29uZGl0aW9uYWwg aW5zdHJ1Y3Rpb25zIGxpc3QuCj4gRGlkIHlvdSBtZWFuIHRoZSB1bmNvbmRpdGlvbmFsIGJsL2Js eD8KCkkgbWVhbnQgYmx4IHJhdGhlciB0aGFuIGJ4IGluIG15IHByZXZpb3VzIGUtbWFpbC4gU29y cnkuCgo+Cj4gQW55aG93IEkgdGhpbmsgeW91ciBjb25jZXJuIGlzIHJpZ2h0LiBXZSBoYXZlIHRv IGNvdmVyIHRoZSBjb25kaXRpb24KPiBmaWVsZC4gU29tZSB1bmNvbmRpdGlvbmFsIGluc3RydWN0 aW9ucyBtYXkgaGF2ZSBhIGNvbmZsaWN0ZWQgb3AgZmllbGQKPiBhcyBjb25kaXRpb25hbCBicmFu Y2ggaW5zdHJ1Y3Rpb25zLgoKVGhlIG9ubHkgdW5jb25kaXRpb25hbCBpbnN0cnVjdGlvbiB3aXRo IHRoZSBzYW1lIGVuY29kaW5nIGlzIGJseC4gU28gaXQgCmlzIGZpbmUuIEJ1dCB0aGlzIGVpdGhl ciBuZWVkIHRvIGJlOgoJMSkgcHJvcGVybHkgZG9jdW1lbnRlZAoJMikgaW50cm9kdWNpbmcgYSBi bHggbWFjcm8KCkNoZWVycywKCi0tIApKdWxpZW4gR3JhbGwKCl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRl dmVsQGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=