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Peter Anvin" , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, x86@kernel.org References: <20221004084335.2838-1-jgross@suse.com> <20221004084335.2838-3-jgross@suse.com> <623a323c-943b-8c69-f877-a0669b9672dc@suse.com> From: Juergen Gross In-Reply-To: <623a323c-943b-8c69-f877-a0669b9672dc@suse.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------8VLduLm00hOTbdgspvNT7QtY" X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------8VLduLm00hOTbdgspvNT7QtY Content-Type: multipart/mixed; boundary="------------5W5T68iAuXvtxEbEyzgWaqVc"; protected-headers="v1" From: Juergen Gross To: Jan Beulich Cc: Boris Ostrovsky , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, x86@kernel.org Message-ID: Subject: Re: [PATCH v2 2/3] xen/pv: refactor msr access functions to support safe and unsafe accesses References: <20221004084335.2838-1-jgross@suse.com> <20221004084335.2838-3-jgross@suse.com> <623a323c-943b-8c69-f877-a0669b9672dc@suse.com> In-Reply-To: <623a323c-943b-8c69-f877-a0669b9672dc@suse.com> --------------5W5T68iAuXvtxEbEyzgWaqVc Content-Type: multipart/mixed; boundary="------------L5DKmkRAuf0Cox0zaXser4Az" --------------L5DKmkRAuf0Cox0zaXser4Az Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 T24gMDQuMTAuMjIgMTM6MDMsIEphbiBCZXVsaWNoIHdyb3RlOg0KPiBPbiAwNC4xMC4yMDIy IDEwOjQzLCBKdWVyZ2VuIEdyb3NzIHdyb3RlOg0KPj4gUmVmYWN0b3IgYW5kIHJlbmFtZSB4 ZW5fcmVhZF9tc3Jfc2FmZSgpIGFuZCB4ZW5fd3JpdGVfbXNyX3NhZmUoKSB0bw0KPj4gc3Vw cG9ydCBib3RoIGNhc2VzIG9mIE1TUiBhY2Nlc3Nlcywgc2FmZSBvbmVzIGFuZCBwb3RlbnRp YWxseSBHUC1mYXVsdA0KPj4gZ2VuZXJhdGluZyBvbmVzLg0KPj4NCj4+IFRoaXMgd2lsbCBw cmVwYXJlIHRvIG5vIGxvbmdlciBzd2FsbG93IEdQcyBzaWxlbnRseSBpbiB4ZW5fcmVhZF9t c3IoKQ0KPj4gYW5kIHhlbl93cml0ZV9tc3IoKS4NCj4+DQo+PiBTaWduZWQtb2ZmLWJ5OiBK dWVyZ2VuIEdyb3NzIDxqZ3Jvc3NAc3VzZS5jb20+DQo+IA0KPiBSZXZpZXdlZC1ieTogSmFu IEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPg0KPiANCj4gQWxiZWl0IC4uLg0KPiANCj4+ IEBAIC05MzMsMjMgKzkzNywzOSBAQCBzdGF0aWMgdTY0IHhlbl9yZWFkX21zcl9zYWZlKHVu c2lnbmVkIGludCBtc3IsIGludCAqZXJyKQ0KPj4gICAJcmV0dXJuIHZhbDsNCj4+ICAgfQ0K Pj4gICANCj4+IC1zdGF0aWMgaW50IHhlbl93cml0ZV9tc3Jfc2FmZSh1bnNpZ25lZCBpbnQg bXNyLCB1bnNpZ25lZCBsb3csIHVuc2lnbmVkIGhpZ2gpDQo+PiArc3RhdGljIHZvaWQgc2V0 X3NlZyh1bnNpZ25lZCBpbnQgd2hpY2gsIHVuc2lnbmVkIGludCBsb3csIHVuc2lnbmVkIGlu dCBoaWdoLA0KPj4gKwkJICAgIGludCAqZXJyKQ0KPj4gICB7DQo+PiAtCWludCByZXQ7DQo+ PiAtCXVuc2lnbmVkIGludCB3aGljaDsNCj4+IC0JdTY0IGJhc2U7DQo+PiArCXU2NCBiYXNl ID0gKCh1NjQpaGlnaCA8PCAzMikgfCBsb3c7DQo+PiArDQo+PiArCWlmIChIWVBFUlZJU09S X3NldF9zZWdtZW50X2Jhc2Uod2hpY2gsIGJhc2UpID09IDApDQo+PiArCQlyZXR1cm47DQo+ PiAgIA0KPj4gLQlyZXQgPSAwOw0KPj4gKwlpZiAoZXJyKQ0KPj4gKwkJKmVyciA9IC1FSU87 DQo+IA0KPiAuLi4gSSBkb24ndCBzZWUgYSBnb29kIHJlYXNvbiB0byBvdmVycmlkZSB0aGUg ZXJyb3IgY29kZSBoYW5kZWQgdG8gdXMNCj4gYnkgdGhlIGh5cGVydmlzb3IgaGVyZTsgSSBk byByZWFsaXplIHRob3VnaCB0aGF0IHRoaXMgLi4uDQo+IA0KPj4gKwllbHNlDQo+PiArCQlX QVJOKDEsICJYZW4gc2V0X3NlZ21lbnRfYmFzZSgldSwgJWxseCkgZmFpbGVkXG4iLCB3aGlj aCwgYmFzZSk7DQo+PiArfQ0KPj4gICANCj4+ICsvKg0KPj4gKyAqIFN1cHBvcnQgd3JpdGVf bXNyX3NhZmUoKSBhbmQgd3JpdGVfbXNyKCkgc2VtYW50aWNzLg0KPj4gKyAqIFdpdGggZXJy ID09IE5VTEwgd3JpdGVfbXNyKCkgc2VtYW50aWNzIGFyZSBzZWxlY3RlZC4NCj4+ICsgKiBT dXBwbHlpbmcgYW4gZXJyIHBvaW50ZXIgcmVxdWlyZXMgZXJyIHRvIGJlIHByZS1pbml0aWFs aXplZCB3aXRoIDAuDQo+PiArICovDQo+PiArc3RhdGljIHZvaWQgeGVuX2RvX3dyaXRlX21z cih1bnNpZ25lZCBpbnQgbXNyLCB1bnNpZ25lZCBpbnQgbG93LA0KPj4gKwkJCSAgICAgdW5z aWduZWQgaW50IGhpZ2gsIGludCAqZXJyKQ0KPj4gK3sNCj4+ICAgCXN3aXRjaCAobXNyKSB7 DQo+PiAtCWNhc2UgTVNSX0ZTX0JBU0U6CQl3aGljaCA9IFNFR0JBU0VfRlM7IGdvdG8gc2V0 Ow0KPj4gLQljYXNlIE1TUl9LRVJORUxfR1NfQkFTRToJd2hpY2ggPSBTRUdCQVNFX0dTX1VT RVI7IGdvdG8gc2V0Ow0KPj4gLQljYXNlIE1TUl9HU19CQVNFOgkJd2hpY2ggPSBTRUdCQVNF X0dTX0tFUk5FTDsgZ290byBzZXQ7DQo+PiAtDQo+PiAtCXNldDoNCj4+IC0JCWJhc2UgPSAo KHU2NCloaWdoIDw8IDMyKSB8IGxvdzsNCj4+IC0JCWlmIChIWVBFUlZJU09SX3NldF9zZWdt ZW50X2Jhc2Uod2hpY2gsIGJhc2UpICE9IDApDQo+PiAtCQkJcmV0ID0gLUVJTzsNCj4gDQo+ IC4uLiB3YXMgdGhpcyB3YXkgYmVmb3JlLg0KDQpBbmQgb24gYmFyZSBtZXRhbCB3cml0ZV9t c3Jfc2FmZSgpIHdpbGwgcmV0dXJuIC1FSU8sIHRvby4NCg0KDQpKdWVyZ2VuDQo= --------------L5DKmkRAuf0Cox0zaXser4Az Content-Type: application/pgp-keys; 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