From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from EUR05-AM6-obe.outbound.protection.outlook.com (EUR05-AM6-obe.outbound.protection.outlook.com [40.107.22.83]) by mx.groups.io with SMTP id smtpd.web10.6292.1594968219376476604 for ; Thu, 16 Jul 2020 23:43:41 -0700 Authentication-Results: mx.groups.io; dkim=pass header.i=@nxp.com header.s=selector2 header.b=brKAu1bJ; spf=pass (domain: nxp.com, ip: 40.107.22.83, mailfrom: wasim.khan@nxp.com) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ii7ov47e70hBHjK98Z5DPXZDrE2wR6UimyyXfVDLqVzdLDOdCTlnz+I4hBev7K6MdiwvQ+6VVRXi2g7poQtQGyLdKbJcA9aAMPBKZLVGlGAE6BYbG3vBOyEFGfhpERDrO/c+DbbLV2hWMOQNaxbSQK9Zc/LjOLBqL0wozWnW+cJkEuMxPIFK+bUvWDybJYyf2z+74EDppMqmDvJZiTpghaZdOFx9rnHk2RSnmlFBX1GcfmlfOz4zJ7YfKfXaoNoMuxqbLnx4G41YZyH0fyYl7uXgOgQHtcFOsHTa6JBYGUrHcxzjAaXSoHIUu+PlqXhiP2+XRlryg2bxmgIt4LmY1w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=/N/rra0M1cdTNtVLIhDxyLGlUICOmSb7RIaK3IkZQIo=; b=MWkKAr3qHVKlG40eHgqA/hRJckK5jnfG2Hr/un2mNQPWL+j/hAtugcPxyyanDNROhR6jbFZ6guohY17G2kOx1q8p6XyJ4qXEm3wf/uBT5wLs8qpLt5T/DM+OHjGTD4ze5+bHABoPxxMaqdld9vqDQ9SD9GJ/Zr/qi9HNtjG19MZtoAJXJLnZJienKyMhFqGx1TPyRwh+ZJrFe6exM0zeazj7t32rv4f9XvfooQNJpYqPyyO6h8S8fdbxlI5XtD8Xnjldt9ejaLcadhDyi8UNoJW2uuFwhQqzRoBmlvZT4YMdj1TkK9uh/JhkUuLHdNSe5883pJbeBAxsSWQzoH3rgw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=/N/rra0M1cdTNtVLIhDxyLGlUICOmSb7RIaK3IkZQIo=; b=brKAu1bJqrD2zJUTX7NDtDSfCl7VYE/JMpUv9A6JeYUeyonWKUn0loEMy9iUNWGMX938wmQ5tesk3G7U5D184oKifolKjq2GiYXNVE7RrtKoeQ5sttYQFCVe74BX8w73Xa9LSWwtwvhlspgZd05We0YIAo0BHm6cUaUD2pZguds= Received: from VE1PR04MB6702.eurprd04.prod.outlook.com (2603:10a6:803:123::13) by VI1PR04MB3199.eurprd04.prod.outlook.com (2603:10a6:802:3::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3174.21; Fri, 17 Jul 2020 06:43:34 +0000 Received: from VE1PR04MB6702.eurprd04.prod.outlook.com ([fe80::81c4:97a6:7592:f225]) by VE1PR04MB6702.eurprd04.prod.outlook.com ([fe80::81c4:97a6:7592:f225%7]) with mapi id 15.20.3174.026; Fri, 17 Jul 2020 06:43:34 +0000 From: "Wasim Khan" To: Laszlo Ersek , "devel@edk2.groups.io" , "afish@apple.com" , Leif Lindholm CC: Mike Kinney , "liming.gao@intel.com" Subject: Re: [edk2-devel] [edk2-discuss] Need memory barriers in IoLib for AARCH64 Thread-Topic: [edk2-devel] [edk2-discuss] Need memory barriers in IoLib for AARCH64 Thread-Index: AdZWtRvkRjqNuS0uQmiWbpxYvXBEFwBVoBtgABhb64AAL2lMgAC0/AVg Date: Fri, 17 Jul 2020 06:43:34 +0000 Message-ID: References: <0d68b7da-01c9-f696-7eb4-ebbef8a5cf0f@redhat.com> In-Reply-To: <0d68b7da-01c9-f696-7eb4-ebbef8a5cf0f@redhat.com> Accept-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: redhat.com; dkim=none (message not signed) header.d=none;redhat.com; dmarc=none action=none header.from=nxp.com; x-originating-ip: [157.47.250.187] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 74bd5927-03f4-45e9-8fcc-08d82a1cba78 x-ms-traffictypediagnostic: VI1PR04MB3199: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:6790; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: +txBOw5gN4kuAdjXta/TrIaeUHBr6QOOcXS7Q/rOo7+8cCgDoFpxtKhz1PFcO3WMQuGGOjAQMUlGHpgcOSUvYSS7hxC1dN4Hq61Gxjv909v/ZX1ncMG/sQSCKpWS+xFBmsbQnBww8viHiowplJMs8/FI48GYkIq7NTR6XaC7qEA2y5f68beImsXfIogbhOnyBo980lkFA3iYSxz5WvfLF6J+6ps9ivw2KskreSIcPISr1z8rjPUOteNk7tLSNxl1mB3Jn96ZTfYU9V/UtJSqtcK9TynUp2D7YPSMaxfrIJBErd6pXK/7ZRpGyuQpQI00nOzi07L8morlgW0NTQA7txAKV1YdVIBD7lKFhSb+qkDS4UvjkFdXJbsHcgnD9QUb0UDNv39ppxTIFkcQ3mLBAg== x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:VE1PR04MB6702.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFTY:;SFS:(6029001)(4636009)(136003)(376002)(346002)(39860400002)(366004)(396003)(44832011)(86362001)(66446008)(66946007)(64756008)(55016002)(5660300002)(8936002)(478600001)(8676002)(66556008)(9686003)(6506007)(83080400001)(33656002)(4326008)(316002)(26005)(76116006)(7696005)(186003)(54906003)(110136005)(53546011)(966005)(66476007)(71200400001)(45080400002)(2906002)(52536014)(83380400001);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata: 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 x-ms-exchange-transport-forked: True MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: VE1PR04MB6702.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 74bd5927-03f4-45e9-8fcc-08d82a1cba78 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Jul 2020 06:43:34.7979 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: c+agHpKoqcUszudNuwqv7vpwZzjcwTU702Kr9o02/EzTR/PxiQcZroK/BK0Ih77kieDk0UoU78gHkuLuSbJtxw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB3199 Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogTGFzemxvIEVyc2VrIDxs ZXJzZWtAcmVkaGF0LmNvbT4NCj4gU2VudDogTW9uZGF5LCBKdWx5IDEzLCAyMDIwIDk6MDIgUE0N Cj4gVG86IGRldmVsQGVkazIuZ3JvdXBzLmlvOyBhZmlzaEBhcHBsZS5jb207IFdhc2ltIEtoYW4N Cj4gPHdhc2ltLmtoYW5AbnhwLmNvbT4NCj4gQ2M6IE1pa2UgS2lubmV5IDxtaWNoYWVsLmQua2lu bmV5QGludGVsLmNvbT47IGxpbWluZy5nYW9AaW50ZWwuY29tOyBMZWlmDQo+IExpbmRob2xtIChO dXZpYSBhZGRyZXNzKSA8bGVpZkBudXZpYWluYy5jb20+DQo+IFN1YmplY3Q6IFJlOiBbZWRrMi1k ZXZlbF0gW2VkazItZGlzY3Vzc10gTmVlZCBtZW1vcnkgYmFycmllcnMgaW4gSW9MaWIgZm9yDQo+ IEFBUkNINjQNCj4gDQo+IE9uIDA3LzEyLzIwIDE4OjU0LCBBbmRyZXcgRmlzaCB2aWEgZ3JvdXBz LmlvIHdyb3RlOg0KPiA+DQo+ID4NCj4gPj4gT24gSnVsIDExLCAyMDIwLCBhdCAxMDoxNyBQTSwg V2FzaW0gS2hhbiA8d2FzaW0ua2hhbkBueHAuY29tPiB3cm90ZToNCj4gPj4NCj4gPj4gSGVsbG8N Cj4gPj4NCj4gPj4gQW55IGNvbW1lbnRzID8NCj4gPj4NCj4gPg0KPiA+IEkgZG9u4oCZdCBzZWUg SW9MaWJBcm0uYyBpbiBtYXN0ZXI/IEkgc2VlIElvTGliTm9Jby5jLg0KPiANCj4gVGhhdCdzIGR1 ZSB0byB0aGUgcmVuYW1lIGluIGNvbW1pdCAwODllOWMxOWE4YzENCj4gKCJNZGVQa2cvQmFzZUlv TGliSW50cmluc2ljOiBSZW5hbWUgSW9MaWJBcm0uYz0+SW9MaWJOb0lvLmMiLCAyMDIwLTA1LTA3 KSwNCj4gd2hpY2ggaGFzIGJlZW4gZmlyc3QgaW5jbHVkZWQgaW4gZWRrMi1zdGFibGUyMDIwMDUu DQo+IA0KPiBJIHRoaW5rIEFyZCBpcyBhd2F5IGF0IHRoZSBtb21lbnQsIHNvIEknbSBhZGRpbmcg TGVpZiB0byB0aGUgQ0MgbGlzdC4NCj4gDQo+IFRoYW5rcw0KPiBMYXN6bG8NCj4gDQo+ID4gVGhl IE1NSU8gZnVuY3Rpb24gbG9vayBsaWtlIEFSTSBhc3NlbWJsZXIgd2l0aCB0aGUgY29ycmVjdCBi YXJyaWVyDQo+IGluc3RydWN0aW9ucy4gVGhlIElPIG9wZXJhdGlvbnMgaW4gdGhpcyBsaWIgYXJl IHRoZSB4ODYgaW4vb3V0IGluc3RydWN0aW9ucywgc28gdGhleQ0KPiBqdXN0IEFTU0VSVCBvbiBB Uk0uDQo+ID4NCj4gPiBPbiB0aGUgWDg2IE1lbW9yeUZlbmNlKCkgaXMganVzdCBhIHNlcmlhbGl6 aW5nIGludHJpbnNpYyBmb3IgdGhlIGNvbXBpbGVyIHRvDQo+IHByZXZlbnQgb3B0aW1pemF0aW9u cyBmcm9tIGJyZWFraW5nIHRoZSBjb2RlLCBraW5kIG9mIGxpa2UgaG93IHlvdSBuZWVkIHRvDQo+ IG1ha2UgTU1JTyBhcyB2b2xhdGlsZSBpbiBDLg0KPiA+DQo+ID4gVGhhbmtzLA0KPiA+DQo+ID4g QW5kcmV3IEZpc2gNCg0KVGhhbmsgeW91IEFuZHJldyBhbmQgTGFzemxvIGZvciB5b3UgcmVzcG9u c2UuIA0KTXkgcHJvYmxlbSB3YXMgdGhhdCBiZWNhdXNlIHRoZXJlIGlzIG5vIE1lbW9yeUZlbmNl KCkgaW4gTW1pb1JlYWQvV3JpdGUgZnVuY3Rpb25zIGluIElvTGliTm9Jby5jLCBJIHdhcyBmYWNp bmcgc29tZSBzZXJpYWxpemluZyBwcm9ibGVtIHdpdGggQUFSQ0g2NC4NCkkgaGF2ZSB0d28gb3B0 aW9uczoNCkVpdGhlciBwdXQgTWVtb3J5RmVuY2UoKSBpbiBteSBjb2RlIHVuZGVyIGVkbDItcGxh dGZvcm1zIGJlZm9yZSBhbmQgYWZ0ZXIgTW1pb1JlYWQvV3JpdGUgY2FsbHMNCk9SDQpBZGQgdGhl IE1lbW9yeUZlbmNlKCkgaW4gTW1pb1JlYWQvV3JpdGUgaXRzZWxmIGZvciBJb0xpYk5vSW8uYywg bGlrZSBpdCBpcyBkb25lIGZvciBJb0xpYi5jIC4gQmVjYXVzZSBJIGRvbuKAmXQgc2VlIGFueSBo YXJtIHRvIG1ha2Ugc3VyZSB0aGF0IE1taW9SZWFkL1dyaXRlIG9wZXJhdGlvbiBhcmUgc2VyaWFs aXplZCBieSB1c2luZyBNZW1vcnlGZW5jZSgpIGluIGl0LiANCg0KSSBwcmVmZXIgbGF0ZXIgb3B0 aW9uLCBpZiB0aGVyZSBpcyBubyBzcGVjaWZpYyByZWFzb24gZm9yIG5vdCBhZGRpbmcgTWVtb3J5 RmVuY2UoKSBmb3IgSW9MaWJOb0lvLmMuDQoNCj4gPg0KPiA+Pj4gLS0tLS1PcmlnaW5hbCBNZXNz YWdlLS0tLS0NCj4gPj4+IEZyb206IFdhc2ltIEtoYW4NCj4gPj4+IFNlbnQ6IEZyaWRheSwgSnVs eSAxMCwgMjAyMCA2OjIwIFBNDQo+ID4+PiBUbzogbWljaGFlbC5kLmtpbm5leUBpbnRlbC5jb207 IGxpbWluZy5nYW9AaW50ZWwuY29tOw0KPiA+Pj4gZGV2ZWxAZWRrMi5ncm91cHMuaW8NCj4gPj4+ IFN1YmplY3Q6IFtlZGsyLWRpc2N1c3NdIE5lZWQgbWVtb3J5IGJhcnJpZXJzIGluIElvTGliIGZv ciBBQVJDSDY0DQo+ID4+Pg0KPiA+Pj4gSGVsbG8sDQo+ID4+Pg0KPiA+Pj4gTWRlUGtnL0xpYnJh cnkvQmFzZUlvTGliSW50cmluc2ljL0Jhc2VJb0xpYkludHJpbnNpYy5pbmY6DQo+ID4+PiBJb0xp YiBsaWJyYXJ5IHVzZXMgSW9MaWJBcm0uYyBmb3IgQUFSQ0g2NC9BUk0gYXJjaGl0ZWN0dXJlIGFu ZA0KPiA+Pj4gSW9MaWIuYyBmb3Igb3RoZXIgYXJjaGl0ZWN0dXJlcy4NCj4gPj4+DQo+ID4+PiBX aGlsZSBJb0xpYi5jIGFscmVhZHkgaGFzIG1lbW9yeSBiYXJyaWVycyBpbiBNbWlvV3JpdGUgZnVu Y3Rpb25zLA0KPiA+Pj4gdGhlcmUgYmFycmllcnMgYXJlIG1pc3NpbmcgaW4gSW9MaWJBcm0uYyBJ cyB0aGVyZSBhbnkgcmVhc29uIGZvcg0KPiA+Pj4gKipub3QqKiBhZGRpbmcgdGhlc2UgbWVtb3J5 IGJhcnJpZXJzIGluIElvTGliQXJtLmMgdG8gZ3VhcmFudGVlIHRoYXQNCj4gPj4+IGFsbCBNTUlP IG9wZXJhdGlvbnMgYXJlIHNlcmlhbGl6ZWQgPw0KPiA+Pj4NCj4gPj4+IEkgYW0gZmFjaW5nIHNv bWUgaXNzdWVzIGFuZCBJIG5lZWQgdG8gYWRkIG1lbW9yeSBiYXJyaWVycyBpbg0KPiA+Pj4gSW9M aWJBcm0uYyBmb3INCj4gPj4+IEFBUkNINjQgYWxzbyAuDQo+ID4+Pg0KPiA+Pj4NCj4gPj4+IFJl Z2FyZHMsDQo+ID4+PiBXYXNpbQ0KPiA+Pg0KPiA+Pg0KPiA+Pg0KPiA+DQo+ID4NCj4gPiANCj4g Pg0KPiA+DQoNCg==