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Peter Anvin" , xen-devel@lists.xenproject.org, x86@kernel.org, linux-kernel@vger.kernel.org References: <20220926141849.21805-1-jgross@suse.com> <20220926141849.21805-2-jgross@suse.com> From: Juergen Gross In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------PJ4Udd0XK2Rtt0I3S2SvuWIB" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------PJ4Udd0XK2Rtt0I3S2SvuWIB Content-Type: multipart/mixed; boundary="------------r3nF5HDYlE0AGuY25mLAcUj2"; 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, x86@kernel.org, linux-kernel@vger.kernel.org Message-ID: <3f69b45d-d8c3-1e23-7fc9-87ffb436ad29@suse.com> Subject: Re: [PATCH 1/3] xen/pv: allow pmu msr accesses to cause GP References: <20220926141849.21805-1-jgross@suse.com> <20220926141849.21805-2-jgross@suse.com> In-Reply-To: --------------r3nF5HDYlE0AGuY25mLAcUj2 Content-Type: multipart/mixed; boundary="------------AHBNTk7j2H0z0YTVyqy04fL6" --------------AHBNTk7j2H0z0YTVyqy04fL6 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 T24gMjYuMDkuMjIgMTc6MjksIEphbiBCZXVsaWNoIHdyb3RlOg0KPiBPbiAyNi4wOS4yMDIy IDE2OjE4LCBKdWVyZ2VuIEdyb3NzIHdyb3RlOg0KPj4gVG9kYXkgcG11X21zcl9yZWFkKCkg YW5kIHBtdV9tc3Jfd3JpdGUoKSBmYWxsIGJhY2sgdG8gdGhlIHNhZmUgdmFyaWFudHMNCj4+ IG9mIHJlYWQvd3JpdGUgTVNSIGluIGNhc2UgdGhlIE1TUiBhY2Nlc3MgaXNuJ3QgZW11bGF0 ZWQgdmlhIFhlbi4gQWxsb3cNCj4+IHRoZSBjYWxsZXIgdG8gc2VsZWN0IHRoZSBwb3RlbnRp YWxseSBmYXVsdGluZyB2YXJpYW50IGJ5IHBhc3NpbmcgTlVMTA0KPj4gZm9yIHRoZSBlcnJv ciBwb2ludGVyLg0KPiANCj4gTWF5YmUgbWFrZSB0aGlzICJ0aGUgc29sZSBjYWxsZXIiIG9y IHNvbWUgc3VjaD8gQmVjYXVzZSBpZiB0aGVyZSB3ZXJlDQo+IG11bHRpcGxlLCB0aGV5IG1p Z2h0IGVhc2lseSBkaXNhZ3JlZSBvbiB3aGF0IHRoZSBiZXN0IG1lYW5pbmcgb2YgcGFzc2lu Zw0KPiBOVUxMIGlzLg0KDQpPa2F5Lg0KDQo+IA0KPj4gLS0tIGEvYXJjaC94ODYveGVuL3Bt dS5jDQo+PiArKysgYi9hcmNoL3g4Ni94ZW4vcG11LmMNCj4+IEBAIC0yOTMsMjIgKzI5Mywy NCBAQCBzdGF0aWMgYm9vbCB4ZW5fYW1kX3BtdV9lbXVsYXRlKHVuc2lnbmVkIGludCBtc3Is IHU2NCAqdmFsLCBib29sIGlzX3JlYWQpDQo+PiAgIGJvb2wgcG11X21zcl9yZWFkKHVuc2ln bmVkIGludCBtc3IsIHVpbnQ2NF90ICp2YWwsIGludCAqZXJyKQ0KPj4gICB7DQo+PiAgIAlp ZiAoYm9vdF9jcHVfZGF0YS54ODZfdmVuZG9yICE9IFg4Nl9WRU5ET1JfSU5URUwpIHsNCj4+ IC0JCWlmIChpc19hbWRfcG11X21zcihtc3IpKSB7DQo+PiAtCQkJaWYgKCF4ZW5fYW1kX3Bt dV9lbXVsYXRlKG1zciwgdmFsLCAxKSkNCj4+IC0JCQkJKnZhbCA9IG5hdGl2ZV9yZWFkX21z cl9zYWZlKG1zciwgZXJyKTsNCj4+IC0JCQlyZXR1cm4gdHJ1ZTsNCj4+ICsJCWlmICghaXNf YW1kX3BtdV9tc3IobXNyKSkNCj4+ICsJCQlyZXR1cm4gZmFsc2U7DQo+PiArCQlpZiAoIXhl bl9hbWRfcG11X2VtdWxhdGUobXNyLCB2YWwsIDEpKSB7DQo+PiArCQkJKnZhbCA9IGVyciA/ IG5hdGl2ZV9yZWFkX21zcl9zYWZlKG1zciwgZXJyKQ0KPj4gKwkJCQkgICA6IG5hdGl2ZV9y ZWFkX21zcihtc3IpOw0KPj4gICAJCX0NCj4+ICsJCXJldHVybiB0cnVlOw0KPiANCj4gTWlu b3IgcmVtYXJrOiBGb2xkIHRoaXMgYW5kIC4uLg0KPiANCj4+ICAgCX0gZWxzZSB7DQo+PiAg IAkJaW50IHR5cGUsIGluZGV4Ow0KPj4gICANCj4+IC0JCWlmIChpc19pbnRlbF9wbXVfbXNy KG1zciwgJnR5cGUsICZpbmRleCkpIHsNCj4+IC0JCQlpZiAoIXhlbl9pbnRlbF9wbXVfZW11 bGF0ZShtc3IsIHZhbCwgdHlwZSwgaW5kZXgsIDEpKQ0KPj4gLQkJCQkqdmFsID0gbmF0aXZl X3JlYWRfbXNyX3NhZmUobXNyLCBlcnIpOw0KPj4gLQkJCXJldHVybiB0cnVlOw0KPj4gKwkJ aWYgKCFpc19pbnRlbF9wbXVfbXNyKG1zciwgJnR5cGUsICZpbmRleCkpDQo+PiArCQkJcmV0 dXJuIGZhbHNlOw0KPj4gKwkJaWYgKCF4ZW5faW50ZWxfcG11X2VtdWxhdGUobXNyLCB2YWws IHR5cGUsIGluZGV4LCAxKSkgew0KPj4gKwkJCSp2YWwgPSBlcnIgPyBuYXRpdmVfcmVhZF9t c3Jfc2FmZShtc3IsIGVycikNCj4+ICsJCQkJICAgOiBuYXRpdmVfcmVhZF9tc3IobXNyKTsN Cj4+ICAgCQl9DQo+PiArCQlyZXR1cm4gdHJ1ZTsNCj4gDQo+IC4uLiB0aGlzIGJ5IG1vdmlu ZyB0aGVtIC4uLg0KPiANCj4+ICAgCX0NCj4+IC0NCj4+IC0JcmV0dXJuIGZhbHNlOw0KPj4g ICB9DQo+IA0KPiAuLi4gYWJvdmUgaGVyZT8gWW91IG1pZ2h0IGV2ZW4gZGUtZHVwbGljYXRl IHRoZSBuYXRpdmVfcmVhZF9tc3J7LF9zYWZlfSgpDQo+IGludm9jYXRpb25zIGJ5IG1vdmlu ZyB0aGVtIG91dCBvZiB0aGUgaWYvZWxzZSAuLi4NCg0KT2gsIG5pY2UgaWRlYSENCg0KDQpK dWVyZ2VuDQoNCg== --------------AHBNTk7j2H0z0YTVyqy04fL6 Content-Type: application/pgp-keys; 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