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Peter Anvin" , X86 ML , Dave Hansen , Peter Zijlstra , LKML , Tom Lendacky , Joerg Roedel , "Konrad Rzeszutek Wilk" , "jan.setjeeilers@oracle.com" , Junaid Shahid , "oweisse@google.com" , Mike Rapoport , Alexander Graf , "mgross@linux.intel.com" , "kuzuno@gmail.com" Subject: RE: [RFC][PATCH v2 12/21] x86/pti: Use PTI stack instead of trampoline stack Thread-Topic: [RFC][PATCH v2 12/21] x86/pti: Use PTI stack instead of trampoline stack Thread-Index: AQHWvEQuYUP+foyKVkmjeD/qxWNSTKnLRB5w Date: Mon, 16 Nov 2020 21:24:37 +0000 Message-ID: <985e90259d654d7c9eb74398c5d927ee@AcuMS.aculab.com> References: <20201116144757.1920077-1-alexandre.chartre@oracle.com> <20201116144757.1920077-13-alexandre.chartre@oracle.com> In-Reply-To: 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 RnJvbTogQWxleGFuZHJlIENoYXJ0cmUNCj4gU2VudDogMTYgTm92ZW1iZXIgMjAyMCAxODoxMA0K PiANCj4gT24gMTEvMTYvMjAgNTo1NyBQTSwgQW5keSBMdXRvbWlyc2tpIHdyb3RlOg0KPiA+IE9u IE1vbiwgTm92IDE2LCAyMDIwIGF0IDY6NDcgQU0gQWxleGFuZHJlIENoYXJ0cmUNCj4gPiA8YWxl eGFuZHJlLmNoYXJ0cmVAb3JhY2xlLmNvbT4gd3JvdGU6DQo+ID4+DQo+ID4+IFdoZW4gZW50ZXJp bmcgdGhlIGtlcm5lbCBmcm9tIHVzZXJsYW5kLCB1c2UgdGhlIHBlci10YXNrIFBUSSBzdGFjaw0K PiA+PiBpbnN0ZWFkIG9mIHRoZSBwZXItY3B1IHRyYW1wb2xpbmUgc3RhY2suIExpa2UgdGhlIHRy YW1wb2xpbmUgc3RhY2ssDQo+ID4+IHRoZSBQVEkgc3RhY2sgaXMgbWFwcGVkIGJvdGggaW4gdGhl IGtlcm5lbCBhbmQgaW4gdGhlIHVzZXIgcGFnZS10YWJsZS4NCj4gPj4gVXNpbmcgYSBwZXItdGFz ayBzdGFjayB3aGljaCBpcyBtYXBwZWQgaW50byB0aGUga2VybmVsIGFuZCB0aGUgdXNlcg0KPiA+ PiBwYWdlLXRhYmxlIGluc3RlYWQgb2YgYSBwZXItY3B1IHN0YWNrIHdpbGwgYWxsb3cgZXhlY3V0 aW5nIG1vcmUgY29kZQ0KPiA+PiBiZWZvcmUgc3dpdGNoaW5nIHRvIHRoZSBrZXJuZWwgc3RhY2sg YW5kIHRvIHRoZSBrZXJuZWwgcGFnZS10YWJsZS4NCj4gPg0KPiA+IFdoeT8NCj4gDQo+IFdoZW4g ZXhlY3V0aW5nIG1vcmUgY29kZSBpbiB0aGUga2VybmVsLCB3ZSBhcmUgbGlrZWx5IHRvIHJlYWNo IGEgcG9pbnQNCj4gd2hlcmUgd2UgbmVlZCB0byBzbGVlcCB3aGlsZSB3ZSBhcmUgdXNpbmcgdGhl IHVzZXIgcGFnZS10YWJsZSwgc28gd2UgbmVlZA0KPiB0byBiZSB1c2luZyBhIHBlci10aHJlYWQg c3RhY2suDQoNCklzbid0IHRoYXQgZ29pbmcgdG8gYWxsb2NhdGUgYSBsb3QgbW9yZSBrZXJuZWwg bWVtb3J5Pw0KDQpJU1RSIHNvbWUgdGhvdWdodHMgYWJvdXQgdXNpbmcgZHluYW1pY2FsbHkgYWxs b2NhdGVkIGtlcm5lbA0Kc3RhY2tzIHdoZW4gKGF0IGxlYXN0IHNvbWUpIHdha2V1cHMgYXJlIGRv bmUgYnkgZGlyZWN0bHkNCnJlc3RhcnRpbmcgdGhlIHN5c3RlbSBjYWxsIC0gc28gdGhhdCB0aGUg c2xlZXBpbmcgdGhyZWFkDQpkb2Vzbid0IGV2ZW4gbmVlZCBhIGtlcm5lbCBzdGFjay4NCihJIGNh bid0IHJlbWVtYmVyIGlmIHRoYXQgd2FzIGxpbnV4IG9yIG9uZSBvZiB0aGUgQlNEcykNCg0KCURh dmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3Vu dCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3 Mzg2IChXYWxlcykNCg==