From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BE101C433FE for ; Thu, 10 Mar 2022 22:37:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344385AbiCJWij (ORCPT ); Thu, 10 Mar 2022 17:38:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233362AbiCJWig (ORCPT ); Thu, 10 Mar 2022 17:38:36 -0500 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9B05E53B45 for ; Thu, 10 Mar 2022 14:37:34 -0800 (PST) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-267-5rxcuN6XPMuO1eF-qzLctA-1; Thu, 10 Mar 2022 22:37:32 +0000 X-MC-Unique: 5rxcuN6XPMuO1eF-qzLctA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.28; Thu, 10 Mar 2022 22:37:30 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.028; Thu, 10 Mar 2022 22:37:30 +0000 From: David Laight To: 'Andrew Cooper' , Bharata B Rao , "linux-kernel@vger.kernel.org" CC: "linux-mm@kvack.org" , "x86@kernel.org" , "kirill.shutemov@linux.intel.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "bp@alien8.de" , "dave.hansen@linux.intel.com" , "catalin.marinas@arm.com" , "will@kernel.org" , "shuah@kernel.org" , "oleg@redhat.com" , "ananth.narayan@amd.com" Subject: RE: [RFC PATCH v0 3/6] x86: Enable Upper Address Ignore(UAI) feature Thread-Topic: [RFC PATCH v0 3/6] x86: Enable Upper Address Ignore(UAI) feature Thread-Index: AQHYNLebTUcnJFmJckKqzLkQmpfxI6y5M6Ug Date: Thu, 10 Mar 2022 22:37:30 +0000 Message-ID: References: <20220310111545.10852-1-bharata@amd.com> <20220310111545.10852-4-bharata@amd.com> <7fccb7f2-fc88-993e-e1b2-919448844112@citrix.com> In-Reply-To: <7fccb7f2-fc88-993e-e1b2-919448844112@citrix.com> Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQW5kcmV3IENvb3Blcg0KPiBTZW50OiAxMCBNYXJjaCAyMDIyIDE5OjQ3DQo+IA0KPiBP biAxMC8wMy8yMDIyIDExOjE1LCBCaGFyYXRhIEIgUmFvIHdyb3RlOg0KPiA+IGRpZmYgLS1naXQg YS9hcmNoL3g4Ni9rZXJuZWwvc2V0dXAuYyBiL2FyY2gveDg2L2tlcm5lbC9zZXR1cC5jDQo+ID4g aW5kZXggZjdhMTMyZWI3OTRkLi4xMjYxNWIxYjRhZjUgMTAwNjQ0DQo+ID4gLS0tIGEvYXJjaC94 ODYva2VybmVsL3NldHVwLmMNCj4gPiArKysgYi9hcmNoL3g4Ni9rZXJuZWwvc2V0dXAuYw0KPiA+ IEBAIC03NDAsNiArNzQwLDEyIEBAIGR1bXBfa2VybmVsX29mZnNldChzdHJ1Y3Qgbm90aWZpZXJf YmxvY2sgKnNlbGYsIHVuc2lnbmVkIGxvbmcgdiwgdm9pZCAqcCkNCj4gPiAgCXJldHVybiAwOw0K PiA+ICB9DQo+ID4NCj4gPiArc3RhdGljIGlubGluZSB2b2lkIF9faW5pdCB1YWlfZW5hYmxlKHZv aWQpDQo+ID4gK3sNCj4gPiArCWlmIChib290X2NwdV9oYXMoWDg2X0ZFQVRVUkVfVUFJKSkNCj4g PiArCQltc3Jfc2V0X2JpdChNU1JfRUZFUiwgX0VGRVJfVUFJKTsNCj4gPiArfQ0KPiA+ICsNCj4g PiAgLyoNCj4gPiAgICogRGV0ZXJtaW5lIGlmIHdlIHdlcmUgbG9hZGVkIGJ5IGFuIEVGSSBsb2Fk ZXIuICBJZiBzbywgdGhlbiB3ZSBoYXZlIGFsc28gYmVlbg0KPiA+ICAgKiBwYXNzZWQgdGhlIGVm aSBtZW1tYXAsIHN5c3RhYiwgZXRjLiwgc28gd2Ugc2hvdWxkIHVzZSB0aGVzZSBkYXRhIHN0cnVj dHVyZXMNCj4gPiBAQCAtMTE0Niw2ICsxMTUyLDggQEAgdm9pZCBfX2luaXQgc2V0dXBfYXJjaChj aGFyICoqY21kbGluZV9wKQ0KPiA+DQo+ID4gIAl4ODZfaW5pdC5wYWdpbmcucGFnZXRhYmxlX2lu aXQoKTsNCj4gPg0KPiA+ICsJdWFpX2VuYWJsZSgpOw0KPiANCj4gSSB3b3VsZCB0aGluayBpbmNy ZWRpYmx5IGNhcmVmdWxseSBiZWZvcmUgZW5hYmxpbmcgVUFJIGJ5IGRlZmF1bHQuDQo+IA0KPiBT dWZmaWNlIGl0IHRvIHNheSB0aGF0IEludGVsIHdlcmUgdGFsa2VkIGRvd24gZnJvbSA3IGJpdHMg dG8gNiwgYW5kDQo+IGFwcGFyZW50bHkgQU1EIGRpZG4ndCBnZXQgdGhlIHNhbWUgbWVtbyBmcm9t IHRoZSBvcmlnaW5hbCByZXF1ZXN0ZXJzLg0KPiANCj4gVGhlIHByb2JsZW0gaXMgdGhhdCBVQUkg KyBMQTU3IG1lYW5zIHRoYXQgYWxsIHRoZSBwb2lzb24gcG9pbnRlcnMgY2Vhc2UNCj4gZnVuY3Rp b25pbmcgYXMgYSBkZWZlbmNlLWluLWRlcHRoIG1lY2hhbmlzbSwgYW5kIGJlY29tZSBsZWdhbCBw b2ludGVycw0KPiBwb2ludGluZyBhdCByYW5kb20gcG9zaXRpb25zIGluIHVzZXIgb3Iga2VybmVs IHNwYWNlLg0KDQpJc24ndCB0aGF0IHRydWUgcmVnYXJkbGVzcyBvZiBob3cgbWFueSBiaXRzIGFy ZSAnaWdub3JlZCcuDQpBRkFJQ1QgdGhlIG9ubHkgc2FuZSB0aGluZyB3b3VsZCBiZSB0byBoYXZl IHNvbWV0aGluZyBpbiB0aGUgY3B1DQp0aGF0IHZlcmlmaWVzIHRoZSAnaWdub3JlZCcgYml0cyBt YXRjaCB2YWx1ZXMgc2V0IGluIHRoZSBQVEUuDQpUaGF0IGNvdWxkIGJlIHVzZWQgdG8gZW5zdXJl ICh3ZWxsIG1ha2UgaXQgbW9yZSBsaWtlbHkpIHRoYXQgc3RhY2sNCmFjY2VzcyBzdGF5IGluIHRo ZSBzdGFjayBhbmQgcG9pbnRlcnMgdG8gbW1hcCgpZWQgZGF0YSBzdGF5DQpwb2ludGluZyB0byB0 aGUgY29ycmVjdCBwYWdlcy4NCg0KSnVzdCBsZXR0aW5nIHVzZXIgYWRkcmVzcyBzcGFjZSBiZSBh bGlhc2VkIGEgbG90IG9mIHRpbWVzIGRvZXNuJ3QNCnNlZW0gbGlrZSBhIHNlY3VyaXR5IGZlYXR1 cmUgdG8gbWUuDQpJdCBtdXN0IGhhdmUgc29tZSBzdHJhbmdlIHVzZSBjYXNlLg0KDQoJRGF2aWQN Cg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZh cm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYg KFdhbGVzKQ0K