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 X-Spam-Level: X-Spam-Status: No, score=-7.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A67A2C4361A for ; Fri, 4 Dec 2020 22:42:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F21822287 for ; Fri, 4 Dec 2020 22:42:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730109AbgLDWmY (ORCPT ); Fri, 4 Dec 2020 17:42:24 -0500 Received: from smtp-fw-6001.amazon.com ([52.95.48.154]:37410 "EHLO smtp-fw-6001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725885AbgLDWmY (ORCPT ); Fri, 4 Dec 2020 17:42:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1607121743; x=1638657743; h=from:to:cc:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version:subject; bh=6hs//QrCHK+YcsZyMw98VFZ/lzLh1j36/CtcngXJqIs=; b=tPgnsQlvWNRjV7vN28MRw6tQ/vAfn5cErjbaE9jpmkEcSvPp6OI5X3Mo 49hBumLgBfoIZeM2eBs8pb6apYAUQdG/OW7eC/BIcPaM7JU4knP/OH3fM PF+AxidRkY1n1JSyyaxMpFDGQ399miEu4cR0nrMemK0ERjsT75YXboMs/ 0=; X-IronPort-AV: E=Sophos;i="5.78,393,1599523200"; d="scan'208";a="70689492" Subject: Re: [PATCH v3 3/5] x86/mm: Optionally flush L1D on context switch Thread-Topic: [PATCH v3 3/5] x86/mm: Optionally flush L1D on context switch Received: from iad12-co-svc-p1-lb1-vlan2.amazon.com (HELO email-inbound-relay-1a-807d4a99.us-east-1.amazon.com) ([10.43.8.2]) by smtp-border-fw-out-6001.iad6.amazon.com with ESMTP; 04 Dec 2020 22:41:36 +0000 Received: from EX13MTAUWB001.ant.amazon.com (iad12-ws-svc-p26-lb9-vlan2.iad.amazon.com [10.40.163.34]) by email-inbound-relay-1a-807d4a99.us-east-1.amazon.com (Postfix) with ESMTPS id B12E2A2024; Fri, 4 Dec 2020 22:41:32 +0000 (UTC) Received: from EX13D01UWB002.ant.amazon.com (10.43.161.136) by EX13MTAUWB001.ant.amazon.com (10.43.161.249) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 4 Dec 2020 22:41:31 +0000 Received: from EX13D01UWB002.ant.amazon.com (10.43.161.136) by EX13d01UWB002.ant.amazon.com (10.43.161.136) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 4 Dec 2020 22:41:31 +0000 Received: from EX13D01UWB002.ant.amazon.com ([10.43.161.136]) by EX13d01UWB002.ant.amazon.com ([10.43.161.136]) with mapi id 15.00.1497.006; Fri, 4 Dec 2020 22:41:31 +0000 From: "Singh, Balbir" To: "tglx@linutronix.de" , "mingo@redhat.com" CC: "linux-kernel@vger.kernel.org" , "peterz@infradead.org" , "keescook@chromium.org" , "torvalds@linux-foundation.org" , "jpoimboe@redhat.com" , "x86@kernel.org" , "tony.luck@intel.com" , "dave.hansen@intel.com" , "thomas.lendacky@amd.com" , "benh@kernel.crashing.org" Thread-Index: AQHWxIrq8Jio7utIHE6rhTXabR6UW6nnfa6AgAAWZwA= Date: Fri, 4 Dec 2020 22:41:31 +0000 Message-ID: <2f66f668210388ab8d80060c605a1c8634e9a1c9.camel@amazon.com> References: <20201127065938.8200-1-sblbir@amazon.com> <20201127065938.8200-4-sblbir@amazon.com> <87lfed9sje.fsf@nanos.tec.linutronix.de> In-Reply-To: <87lfed9sje.fsf@nanos.tec.linutronix.de> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.43.160.229] Content-Type: text/plain; charset="utf-8" Content-ID: <36053285E9825343ADFC6B9131CDF2FB@amazon.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gRnJpLCAyMDIwLTEyLTA0IGF0IDIyOjIxICswMTAwLCBUaG9tYXMgR2xlaXhuZXIgd3JvdGU6 DQo+IENBVVRJT046IFRoaXMgZW1haWwgb3JpZ2luYXRlZCBmcm9tIG91dHNpZGUgb2YgdGhlIG9y Z2FuaXphdGlvbi4gRG8gbm90IGNsaWNrIGxpbmtzIG9yIG9wZW4gYXR0YWNobWVudHMgdW5sZXNz IHlvdSBjYW4gY29uZmlybSB0aGUgc2VuZGVyIGFuZCBrbm93IHRoZSBjb250ZW50IGlzIHNhZmUu DQo+IA0KPiANCj4gDQo+IE9uIEZyaSwgTm92IDI3IDIwMjAgYXQgMTc6NTksIEJhbGJpciBTaW5n aCB3cm90ZToNCj4gPiANCj4gPiArICAgICAvKg0KPiA+ICsgICAgICAqIEZsdXNoIG9ubHkgaWYg U01UIGlzIGRpc2FibGVkIGFzIHBlciB0aGUgY29udHJhY3QsIHdoaWNoIGlzIGNoZWNrZWQNCj4g PiArICAgICAgKiB3aGVuIHRoZSBmZWF0dXJlIGlzIGVuYWJsZWQuDQo+ID4gKyAgICAgICovDQo+ ID4gKyAgICAgaWYgKHNjaGVkX3NtdF9hY3RpdmUoKSAmJiAhdGhpc19jcHVfcmVhZChjcHVfaW5m by5zbXRfYWN0aXZlKSAmJg0KPiA+ICsgICAgICAgICAgICAgKHByZXZfbW0gJiBMQVNUX1VTRVJf TU1fTDFEX0ZMVVNIKSkNCj4gPiArICAgICAgICAgICAgIGwxZF9mbHVzaF9odygpOw0KPiANCj4g U28gaWYgU01UIGlzIGNvbXBsZXRlbHkgZGlzYWJsZWQgdGhlbiBubyBmbHVzaD8gU2hvdWxkbid0 IHRoZSBsb2dpYyBiZToNCj4gDQo+ICAgICBpZiAoKCFzY2hlZF9zbXRfYWN0aXZlKCkgfHwgIXRo aXNfY3B1X3JlYWQoY3B1X2luZm8uc210X2FjdGl2ZSkgJiYNCj4gICAgICAgICAgKHByZXZfbW0g JiBMQVNUX1VTRVJfTU1fTDFEX0ZMVVNIKSkNCj4gDQo+IEhtbT8NCj4gDQo+IEJ1dCB0aGF0J3Mg YmFkLCBiZWNhdXNlIGl0J3MgbG90J3Mgb2YgY29uZGl0aW9ucyB0byBldmFsdWF0ZSBmb3IgZXZl cnkNCj4gc3dpdGNoX21tIHdoZXJlIG1vc3Qgb2YgdGhlbSBhcmUgbm90IGludGVyZXN0ZWQgaW4g aXQgYXQgYWxsLg0KPiANCj4gTGV0IG1lIHJlYWQgdGhyb3VnaCB0aGUgcmVzdCBvZiB0aGUgcGls ZS4NCj4NCg0KDQpXZSBkb24ndCBuZWVkIHRoaXMgYW55bW9yZSB3aXRoIHRoZSBuZXcgY2hlY2tz IGZvciBwcmVlbXB0aW5nIGtpbGxpbmcNCm9mIHRoZSB0YXNrLCBzbyBpdCBjYW4gYmUgcmVtb3Zl ZA0KDQpCYWxiaXIgDQo=