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=-6.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham 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 ADF54C31E50 for ; Sun, 16 Jun 2019 15:44:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 769F42085A for ; Sun, 16 Jun 2019 15:44:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727350AbfFPPoQ (ORCPT ); Sun, 16 Jun 2019 11:44:16 -0400 Received: from mga18.intel.com ([134.134.136.126]:7286 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725895AbfFPPoP (ORCPT ); Sun, 16 Jun 2019 11:44:15 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Jun 2019 08:44:15 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,382,1557212400"; d="scan'208";a="185491381" Received: from fmsmsx106.amr.corp.intel.com ([10.18.124.204]) by fmsmga002.fm.intel.com with ESMTP; 16 Jun 2019 08:44:14 -0700 Received: from fmsmsx116.amr.corp.intel.com (10.18.116.20) by FMSMSX106.amr.corp.intel.com (10.18.124.204) with Microsoft SMTP Server (TLS) id 14.3.439.0; Sun, 16 Jun 2019 08:44:14 -0700 Received: from crsmsx104.amr.corp.intel.com (172.18.63.32) by fmsmsx116.amr.corp.intel.com (10.18.116.20) with Microsoft SMTP Server (TLS) id 14.3.439.0; Sun, 16 Jun 2019 08:44:14 -0700 Received: from crsmsx101.amr.corp.intel.com ([169.254.1.187]) by CRSMSX104.amr.corp.intel.com ([169.254.6.16]) with mapi id 14.03.0439.000; Sun, 16 Jun 2019 09:44:12 -0600 From: "Bae, Chang Seok" To: Andy Lutomirski , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Andi Kleen CC: LKML Subject: Re: [PATCH v7 01/18] x86/fsgsbase/64: Fix ARCH_SET_FS/GS behaviors for a remote task Thread-Topic: [PATCH v7 01/18] x86/fsgsbase/64: Fix ARCH_SET_FS/GS behaviors for a remote task Thread-Index: AQHVBb/onKwUkeAk7kuRgUjnvLmEiKZh3xmAgDpUuACAAtnzgA== Date: Sun, 16 Jun 2019 15:44:11 +0000 Message-ID: <9040CFCD-74BD-4C17-9A01-B9B713CF6B10@intel.com> References: <1557309753-24073-1-git-send-email-chang.seok.bae@intel.com> <1557309753-24073-2-git-send-email-chang.seok.bae@intel.com> <74F4F506-2913-4013-9D81-A0C69FA8CDF1@intel.com> <6420E1A5-B5AD-4028-AA91-AA4D5445AC83@intel.com> In-Reply-To: <6420E1A5-B5AD-4028-AA91-AA4D5445AC83@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.254.190.226] Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQo+IE9uIEp1biAxNCwgMjAxOSwgYXQgMTM6MTEsIEJhZSwgQ2hhbmcgU2VvayA8Y2hhbmcuc2Vv ay5iYWVAaW50ZWwuY29tPiB3cm90ZToNCj4+IA0KPj4gT24gTWF5IDgsIDIwMTksIGF0IDEwOjI1 LCBCYWUsIENoYW5nIFNlb2sgPGNoYW5nLnNlb2suYmFlQGludGVsLmNvbT4gd3JvdGU6DQo+PiAN Cj4+PiBPbiBNYXkgOCwgMjAxOSwgYXQgMDM6MDIsIEJhZSwgQ2hhbmcgU2VvayA8Y2hhbmcuc2Vv ay5iYWVAaW50ZWwuY29tPiB3cm90ZToNCj4+PiANCj4+PiBkaWZmIC0tZ2l0IGEvYXJjaC94ODYv a2VybmVsL3B0cmFjZS5jIGIvYXJjaC94ODYva2VybmVsL3B0cmFjZS5jDQo+Pj4gaW5kZXggNGI4 ZWUwNS4uMzMwOWNmZSAxMDA2NDQNCj4+PiAtLS0gYS9hcmNoL3g4Ni9rZXJuZWwvcHRyYWNlLmMN Cj4+PiArKysgYi9hcmNoL3g4Ni9rZXJuZWwvcHRyYWNlLmMNCj4+PiBAQCAtMzk2LDIyICszOTYs MTIgQEAgc3RhdGljIGludCBwdXRyZWcoc3RydWN0IHRhc2tfc3RydWN0ICpjaGlsZCwNCj4+PiAJ Y2FzZSBvZmZzZXRvZihzdHJ1Y3QgdXNlcl9yZWdzX3N0cnVjdCxmc19iYXNlKToNCj4+PiAJCWlm ICh2YWx1ZSA+PSBUQVNLX1NJWkVfTUFYKQ0KPj4+IAkJCXJldHVybiAtRUlPOw0KPj4+IC0JCS8q DQo+Pj4gLQkJICogV2hlbiBjaGFuZ2luZyB0aGUgRlMgYmFzZSwgdXNlIGRvX2FyY2hfcHJjdGxf NjQoKQ0KPj4+IC0JCSAqIHRvIHNldCB0aGUgaW5kZXggdG8gemVybyBhbmQgdG8gc2V0IHRoZSBi YXNlDQo+Pj4gLQkJICogYXMgcmVxdWVzdGVkLg0KPj4+IC0JCSAqLw0KPj4+IC0JCWlmIChjaGls ZC0+dGhyZWFkLmZzYmFzZSAhPSB2YWx1ZSkNCj4+PiAtCQkJcmV0dXJuIGRvX2FyY2hfcHJjdGxf NjQoY2hpbGQsIEFSQ0hfU0VUX0ZTLCB2YWx1ZSk7DQo+Pj4gKwkJeDg2X2ZzYmFzZV93cml0ZV9j cHUoY2hpbGQsIHZhbHVlKTsNCj4gDQo+IFRoaXMgc2hvdWxkIGJlIHg4Nl9mc2Jhc2Vfd3JpdGVf dGFzaygpIGluc3RlYWQgb2YgKmNwdSgpDQo+IA0KPj4+IAkJcmV0dXJuIDA7DQo+Pj4gCWNhc2Ug b2Zmc2V0b2Yoc3RydWN0IHVzZXJfcmVnc19zdHJ1Y3QsZ3NfYmFzZSk6DQo+Pj4gLQkJLyoNCj4+ PiAtCQkgKiBFeGFjdGx5IHRoZSBzYW1lIGhlcmUgYXMgdGhlICVmcyBoYW5kbGluZyBhYm92ZS4N Cj4+PiAtCQkgKi8NCj4+PiAJCWlmICh2YWx1ZSA+PSBUQVNLX1NJWkVfTUFYKQ0KPj4+IAkJCXJl dHVybiAtRUlPOw0KPj4+IC0JCWlmIChjaGlsZC0+dGhyZWFkLmdzYmFzZSAhPSB2YWx1ZSkNCj4+ PiAtCQkJcmV0dXJuIGRvX2FyY2hfcHJjdGxfNjQoY2hpbGQsIEFSQ0hfU0VUX0dTLCB2YWx1ZSk7 DQo+Pj4gKwkJeDg2X2dzYmFzZV93cml0ZV9jcHUoY2hpbGQsIHZhbHVlKTsNCj4gDQo+IFRoaXMg c2hvdWxkIGJlIGFsc28geDg2X2dzYmFzZV93cml0ZV90YXNrKCkgaW5zdGVhZCBvZiAqY3B1KCkN Cj4gDQo+Pj4gDQo+PiANCj4+IEhtbSwgc29ycnkgdGhlcmUgaXMgYSBnbGl0Y2guICBBdCBsZWFz dCwgaW50ZW5kZWQgdGhpcyB0aXRsZSB0byBiZQ0KPj4g4oCcRml4IHB0cmFjZS1pbmR1Y2VkIEZT L0dTQkFTRSB3cml0ZSBiZWhhdmlvcuKAnSBhbmQgbm8gY2hhbmdlcw0KPj4gaW4gdGhlIFBSQ1RM LiBXaWxsIGZpeCBpbiB0aGUgbmV4dCB2ZXJzaW9uLg0KPj4gDQo+IA0KPiBIaSBUaG9tYXMsIA0K PiANCj4gRHVlIHRvIHRoZSBpc3N1ZXMgb24gdGhpcyBwYXRjaCAtIG15IGFwb2xvZ2llcywgSSB3 YXMgb3JpZ2luYWxseQ0KPiBjb25zaWRlcmluZyB0aGUgdjguIEdpdmVuIHlvdXIgcmUtd3JpdGUg YW5kIGNvbW1lbnRzIG9uIHRoZSBsYXN0IA0KPiBwYXRjaCAodGhlIGRvY3VtZW50YXRpb24pLCBh dCBsZWFzdCBJIHdhbnQvbmVlZCB0byBnaXZlIG15IGhlYWRzLXVwLg0KPiANCj4gVGhhbmtzLA0K PiBDaGFuZw0KDQpbIEluY2x1ZGUgTEtNTCBiYWNrLiBVbmludGVudGlvbmFsbHksIGl0IHdhcyBt aXNzZWQuIF0NCg0KTG9va3MgYnVpbGQgZXJyb3Igd2FzIHJlcG9ydGVkIHdpdGggdGhpcy4gU29y cnkgYWdhaW4gZm9yIHRoZSBub2lzZS4NCkJlbG93IHBhdGNoIHdhcyBwcmVwYXJlZCB0byBmaXgg YW5kIHRvIHNlbmQgd2l0aCB2ODoNCg0KRnJvbSBjOWFhN2Y2YzczMDZhYTQ2YjNlY2JiMjY2OTg5 NzE4YzFiMWRjODVlIE1vbiBTZXAgMTcgMDA6MDA6MDAgMjAwMQ0KRnJvbTogIkNoYW5nIFMuIEJh ZSIgPGNoYW5nLnNlb2suYmFlQGludGVsLmNvbT4NCkRhdGU6IFdlZCwgMSBNYXkgMjAxOSAwODow Njo0NSAtMDcwMA0KU3ViamVjdDogeDg2L2ZzZ3NiYXNlLzY0OiBGaXggcHRyYWNlLWluZHVjZWQg RlMvR1NCQVNFIHdyaXRpbmcgYmVoYXZpb3JzDQoNCldoZW4gYSBwdHJhY2VyIHdyaXRlcyB0byBh IHB0cmFjZWUncyBGUy9HU0JBU0Ugd2l0aCBhIGRpZmZlcmVudCB2YWx1ZSwNCnRoZSBzZWxlY3Rv ciBpcyBhbHNvIGNsZWFyZWQuIFRoaXMgYmVoYXZpb3IgaXMgbm90IHN0cmFpZ2h0Zm9yd2FyZC4N Cg0KVGhlIGNoYW5nZSB3aWxsIG1ha2UgdGhlIGJlaGF2aW9yIHNpbXBsZSBhbmQgc2Vuc2libGUs IGFzIGl0IHdpbGwNCihvbmx5KSB1cGRhdGUgdGhlIGJhc2Ugd2hlbiByZXF1ZXN0ZWQuIEFsc28s IHRoZSBjb25kaXRpb24gY2hlY2sgZm9yDQpjb21wYXJpbmcgdGhlIGJhc2UgaXMgcmVtb3ZlZCB0 byBtYWtlIG1vcmUgc2ltcGxlLiBJdCBtaWdodCBzYXZlIGEgZmV3DQpjeWNsZXMsIGJ1dCB0aGlz IHBhdGggaXMgbm90IHBlcmZvcm1hbmNlIGNyaXRpY2FsLg0KDQpUaGUgb25seSByZWNvZ25pemFi bGUgZG93bnNpZGUgb2YgdGhpcyBjaGFuZ2UgaXMgd2hlbiB3cml0aW5nIHRoZSBiYXNlDQppZiB0 aGUgc2VsZWN0b3IgaXMgYWxyZWFkeSBub256ZXJvLiBUaGUgYmFzZSB3aWxsIGJlIHJlbG9hZGVk IGFjY29yZGluZw0KdG8gdGhlIHNlbGVjdG9yLiBCdXQgdGhlIGNhc2UgaXMgaGlnaGx5IHVuZXhw ZWN0ZWQgaW4gcmVhbCB1c2FnZXMuDQoNClN1Z2dlc3RlZC1ieTogQW5keSBMdXRvbWlyc2tpIDxs dXRvQGtlcm5lbC5vcmc+DQpTaWduZWQtb2ZmLWJ5OiBDaGFuZyBTLiBCYWUgPGNoYW5nLnNlb2su YmFlQGludGVsLmNvbT4NCkNjOiBUaG9tYXMgR2xlaXhuZXIgPHRnbHhAbGludXRyb25peC5kZT4N CkNjOiBJbmdvIE1vbG5hciA8bWluZ29Aa2VybmVsLm9yZz4NCkNjOiBILiBQZXRlciBBbnZpbiA8 aHBhQHp5dG9yLmNvbT4NCkNjOiBBbmRpIEtsZWVuIDxha0BsaW51eC5pbnRlbC5jb20+DQotLS0N CiBhcmNoL3g4Ni9rZXJuZWwvcHRyYWNlLmMgfCAxNCArKy0tLS0tLS0tLS0tLQ0KIDEgZmlsZSBj aGFuZ2VkLCAyIGluc2VydGlvbnMoKyksIDEyIGRlbGV0aW9ucygtKQ0KDQpkaWZmIC0tZ2l0IGEv YXJjaC94ODYva2VybmVsL3B0cmFjZS5jIGIvYXJjaC94ODYva2VybmVsL3B0cmFjZS5jDQppbmRl eCBhMTY2Yzk2Li4zMTA4Y2RjIDEwMDY0NA0KLS0tIGEvYXJjaC94ODYva2VybmVsL3B0cmFjZS5j DQorKysgYi9hcmNoL3g4Ni9rZXJuZWwvcHRyYWNlLmMNCkBAIC0zOTcsMjIgKzM5NywxMiBAQCBz dGF0aWMgaW50IHB1dHJlZyhzdHJ1Y3QgdGFza19zdHJ1Y3QgKmNoaWxkLA0KIAljYXNlIG9mZnNl dG9mKHN0cnVjdCB1c2VyX3JlZ3Nfc3RydWN0LGZzX2Jhc2UpOg0KIAkJaWYgKHZhbHVlID49IFRB U0tfU0laRV9NQVgpDQogCQkJcmV0dXJuIC1FSU87DQotCQkvKg0KLQkJICogV2hlbiBjaGFuZ2lu ZyB0aGUgRlMgYmFzZSwgdXNlIGRvX2FyY2hfcHJjdGxfNjQoKQ0KLQkJICogdG8gc2V0IHRoZSBp bmRleCB0byB6ZXJvIGFuZCB0byBzZXQgdGhlIGJhc2UNCi0JCSAqIGFzIHJlcXVlc3RlZC4NCi0J CSAqLw0KLQkJaWYgKGNoaWxkLT50aHJlYWQuZnNiYXNlICE9IHZhbHVlKQ0KLQkJCXJldHVybiBk b19hcmNoX3ByY3RsXzY0KGNoaWxkLCBBUkNIX1NFVF9GUywgdmFsdWUpOw0KKwkJeDg2X2ZzYmFz ZV93cml0ZV90YXNrKGNoaWxkLCB2YWx1ZSk7DQogCQlyZXR1cm4gMDsNCiAJY2FzZSBvZmZzZXRv ZihzdHJ1Y3QgdXNlcl9yZWdzX3N0cnVjdCxnc19iYXNlKToNCi0JCS8qDQotCQkgKiBFeGFjdGx5 IHRoZSBzYW1lIGhlcmUgYXMgdGhlICVmcyBoYW5kbGluZyBhYm92ZS4NCi0JCSAqLw0KIAkJaWYg KHZhbHVlID49IFRBU0tfU0laRV9NQVgpDQogCQkJcmV0dXJuIC1FSU87DQotCQlpZiAoY2hpbGQt PnRocmVhZC5nc2Jhc2UgIT0gdmFsdWUpDQotCQkJcmV0dXJuIGRvX2FyY2hfcHJjdGxfNjQoY2hp bGQsIEFSQ0hfU0VUX0dTLCB2YWx1ZSk7DQorCQl4ODZfZ3NiYXNlX3dyaXRlX3Rhc2soY2hpbGQs IHZhbHVlKTsNCiAJCXJldHVybiAwOw0KICNlbmRpZg0KIAl9DQotLSANCjIuNy40DQoNCg0K