Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933830AbeAHP0r (ORCPT + 1 other); Mon, 8 Jan 2018 10:26:47 -0500 Received: from smtp-out4.electric.net ([192.162.216.195]:62765 "EHLO smtp-out4.electric.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933081AbeAHP0p (ORCPT ); Mon, 8 Jan 2018 10:26:45 -0500 From: David Laight To: 'Ard Biesheuvel' , Will Deacon CC: "linux-arm-kernel@lists.infradead.org" , Catalin Marinas , Marc Zyngier , "Lorenzo Pieralisi" , Christoffer Dall , Linux Kernel Mailing List , Laura Abbott Subject: RE: [PATCH v2 01/11] arm64: use RET instruction for exiting the trampoline Thread-Topic: [PATCH v2 01/11] arm64: use RET instruction for exiting the trampoline Thread-Index: AQHTiI5ncZlCPTyy4k2gBgnsGsGOeaNqDUig Date: Mon, 8 Jan 2018 15:27:28 +0000 Message-ID: References: <1515157961-20963-1-git-send-email-will.deacon@arm.com> <1515157961-20963-2-git-send-email-will.deacon@arm.com> <20180108143345.GH25869@arm.com> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.33] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-Outbound-IP: 156.67.243.126 X-Env-From: David.Laight@ACULAB.COM X-Proto: esmtps X-Revdns: X-HELO: AcuMS.aculab.com X-TLS: TLSv1.2:ECDHE-RSA-AES256-SHA384:256 X-Authenticated_ID: X-PolicySMART: 3396946, 3397078 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: RnJvbTogQXJkIEJpZXNoZXV2ZWwNCj4gU2VudDogMDggSmFudWFyeSAyMDE4IDE0OjM4DQo+IFRv OiBXaWxsIERlYWNvbg0KPiBDYzogbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3Jn OyBDYXRhbGluIE1hcmluYXM7IE1hcmMgWnluZ2llcjsgTG9yZW56byBQaWVyYWxpc2k7DQo+IENo cmlzdG9mZmVyIERhbGw7IExpbnV4IEtlcm5lbCBNYWlsaW5nIExpc3Q7IExhdXJhIEFiYm90dA0K PiBTdWJqZWN0OiBSZTogW1BBVENIIHYyIDAxLzExXSBhcm02NDogdXNlIFJFVCBpbnN0cnVjdGlv biBmb3IgZXhpdGluZyB0aGUgdHJhbXBvbGluZQ0KPiANCj4gT24gOCBKYW51YXJ5IDIwMTggYXQg MTQ6MzMsIFdpbGwgRGVhY29uIDx3aWxsLmRlYWNvbkBhcm0uY29tPiB3cm90ZToNCj4gPiBPbiBT YXQsIEphbiAwNiwgMjAxOCBhdCAwMToxMzoyM1BNICswMDAwLCBBcmQgQmllc2hldXZlbCB3cm90 ZToNCj4gPj4gT24gNSBKYW51YXJ5IDIwMTggYXQgMTM6MTIsIFdpbGwgRGVhY29uIDx3aWxsLmRl YWNvbkBhcm0uY29tPiB3cm90ZToNCj4gPj4gPiBTcGVjdWxhdGlvbiBhdHRhY2tzIGFnYWluc3Qg dGhlIGVudHJ5IHRyYW1wb2xpbmUgY2FuIHBvdGVudGlhbGx5IHJlc3RlZXINCj4gPj4gPiB0aGUg c3BlY3VsYXRpdmUgaW5zdHJ1Y3Rpb24gc3RyZWFtIHRocm91Z2ggdGhlIGluZGlyZWN0IGJyYW5j aCBhbmQgaW50bw0KPiA+PiA+IGFyYml0cmFyeSBnYWRnZXRzIHdpdGhpbiB0aGUga2VybmVsLg0K PiA+PiA+DQo+ID4+ID4gVGhpcyBwYXRjaCBkZWZlbmRzIGFnYWluc3QgdGhlc2UgYXR0YWNrcyBi eSBmb3JjaW5nIGEgbWlzcHJlZGljdGlvbg0KPiA+PiA+IHRocm91Z2ggdGhlIHJldHVybiBzdGFj azogYSBkdW1teSBCTCBpbnN0cnVjdGlvbiBsb2FkcyBhbiBlbnRyeSBpbnRvDQo+ID4+ID4gdGhl IHN0YWNrLCBzbyB0aGF0IHRoZSBwcmVkaWN0ZWQgcHJvZ3JhbSBmbG93IG9mIHRoZSBzdWJzZXF1 ZW50IFJFVA0KPiA+PiA+IGluc3RydWN0aW9uIGlzIHRvIGEgYnJhbmNoLXRvLXNlbGYgaW5zdHJ1 Y3Rpb24gd2hpY2ggaXMgZmluYWxseSByZXNvbHZlZA0KPiA+PiA+IGFzIGEgYnJhbmNoIHRvIHRo ZSBrZXJuZWwgdmVjdG9ycyB3aXRoIHNwZWN1bGF0aW9uIHN1cHByZXNzZWQuDQo+ID4+ID4NCj4g Pj4NCj4gPj4gSG93IHNhZmUgaXMgaXQgdG8gYXNzdW1lIHRoYXQgZXZlcnkgbWljcm9hcmNoaXRl Y3R1cmUgd2lsbCBiZWhhdmUgYXMNCj4gPj4gZXhwZWN0ZWQgaGVyZT8gV291bGRuJ3QgaXQgYmUg c2FmZXIgaW4gZ2VuZXJhbCBub3QgdG8gcmVseSBvbiBhIG1lbW9yeQ0KPiA+PiBsb2FkIGZvciB4 MzAgaW4gdGhlIGZpcnN0IHBsYWNlPyAoc2VlIGJlbG93KSBPciBtYXkgdGhlIHNwZWN1bGF0aXZl DQo+ID4+IGV4ZWN1dGlvbiBzdGlsbCBicmFuY2ggYW55d2hlcmUgZXZlbiBpZiB0aGUgYnJhbmNo IHRhcmdldCBpcw0KPiA+PiBndWFyYW50ZWVkIHRvIGJlIGtub3duIGJ5IHRoYXQgdGltZT8NCj4g Pg0KPiA+IFRoZSBtYWluIHByb2JsZW0gd2l0aCB0aGlzIGFwcHJvYWNoIGlzIHRoYXQgRUwwIGNh biByZWFkIG91dCB0aGUgdGV4dCBhbmQNCj4gPiBmaW5kIHRoZSBrYXNsciBvZmZzZXQuDQo+IA0K PiBOb3QgcmVhbGx5IC0gdGhlIENPTkZJR19SQU5ET01JWkVfQkFTRSBwYXRoIHB1dHMgdGhlIG1v dnovbW92aw0KPiBzZXF1ZW5jZSBpbiB0aGUgbmV4dCBwYWdlLCBidXQgdGhhdCBkb2VzIGludm9s dmUgYW4gdW5jb25kaXRpb25hbA0KPiBicmFuY2guDQo+IA0KPiA+IFRoZSBtZW1vcnkgbG9hZCBp cyBmaW5lLCBiZWNhdXNlIHRoZSBkYXRhIHBhZ2UgaXMNCj4gPiB1bm1hcHBlZCBhbG9uZyB3aXRo IHRoZSBrZXJuZWwgdGV4dC4gSSdtIG5vdCBhd2FyZSBvZiBhbnkNCj4gPiBtaWNyby1hcmNoaXRl Y3R1cmVzIHdoZXJlIHRoaXMgcGF0Y2ggZG9lc24ndCBkbyB3aGF0IHdlIG5lZWQuDQo+ID4NCj4g DQo+IFdlbGwsIHRoZSBtZW1vcnkgbG9hZCBpcyB3aGF0IG1heSBpbmN1ciB0aGUgZGVsYXksIGNy ZWF0aW5nIHRoZSB3aW5kb3cNCj4gZm9yIHNwZWN1bGF0aXZlIGV4ZWN1dGlvbiBvZiB0aGUgaW5k aXJlY3QgYnJhbmNoLiBXaGF0IEkgZG9uJ3QgaGF2ZQ0KPiBlbm91Z2ggb2YgYSBoYW5kbGUgb24g aXMgd2hldGhlciB0aGlzIHNwZWN1bGF0aXZlIGV4ZWN1dGlvbiBtYXkgc3RpbGwNCj4gYnJhbmNo IHRvIHdoZXJldmVyIHRoZSBicmFuY2ggcHJlZGljdG9yIGlzIHBvaW50aW5nIGV2ZW4gaWYgdGhl DQo+IHJlZ2lzdGVyIGNvbnRhaW5pbmcgdGhlIGJyYW5jaCB0YXJnZXQgaXMgYWxyZWFkeSBhdmFp bGFibGUuDQoNCkkgd291bGQgZXhwZWN0IHRoZSBwcmVkaWN0ZWQgYWRkcmVzcyB0byBiZSB1c2Vk Lg0KTXVjaCB0aGUgc2FtZSBhcyBhIGNvbmRpdGlvbmFsIGJyYW5jaCBkb2Vzbid0IHVzZSB0aGUg ZmxhZ3MNCnZhbHVlIGF0IHRoZSB0aW1lIHRoZSBpbnN0cnVjdGlvbiBpcyBkZWNvZGVkLg0KDQoJ RGF2aWQNCg0K