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Wed, 19 Aug 2020 15:26:44 +0000 (UTC) Received: from EX13D20UWC001.ant.amazon.com (10.43.162.244) by EX13MTAUWC001.ant.amazon.com (10.43.162.135) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 19 Aug 2020 15:26:43 +0000 Received: from 38f9d3867b82.ant.amazon.com (10.43.161.71) by EX13D20UWC001.ant.amazon.com (10.43.162.244) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 19 Aug 2020 15:26:42 +0000 Subject: Re: [PATCH v3 07/12] KVM: x86: Ensure the MSR bitmap never clears userspace tracked MSRs To: Aaron Lewis , CC: , , References: <20200818211533.849501-1-aaronlewis@google.com> <20200818211533.849501-8-aaronlewis@google.com> From: Alexander Graf Message-ID: <522d8a2f-8047-32f6-a329-c9ace7bf3693@amazon.com> Date: Wed, 19 Aug 2020 17:26:37 +0200 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20200818211533.849501-8-aaronlewis@google.com> Content-Language: en-US X-Originating-IP: [10.43.161.71] X-ClientProxiedBy: EX13D06UWC003.ant.amazon.com (10.43.162.86) To EX13D20UWC001.ant.amazon.com (10.43.162.244) Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: base64 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org CgpPbiAxOC4wOC4yMCAyMzoxNSwgQWFyb24gTGV3aXMgd3JvdGU6Cj4gCj4gU0RNIHZvbHVtZSAz OiAyNC42LjkgIk1TUi1CaXRtYXAgQWRkcmVzcyIgYW5kIEFQTSB2b2x1bWUgMjogMTUuMTEgIk1T Cj4gaW50ZXJjZXB0cyIgZGVzY3JpYmUgTVNSIHBlcm1pc3Npb24gYml0bWFwcy4gIFBlcm1pc3Np b24gYml0bWFwcyBhcmUKPiB1c2VkIHRvIGNvbnRyb2wgd2hldGhlciBhbiBleGVjdXRpb24gb2Yg cmRtc3Igb3Igd3Jtc3Igd2lsbCBjYXVzZSBhCj4gdm0gZXhpdC4gIEZvciB1c2Vyc3BhY2UgdHJh Y2tlZCBNU1JzIGl0IGlzIHJlcXVpcmVkIHRoZXkgY2F1c2UgYSB2bQo+IGV4aXQsIHNvIHRoZSBo b3N0IGlzIGFibGUgdG8gZm9yd2FyZCB0aGUgTVNSIHRvIHVzZXJzcGFjZS4gIFRoaXMgY2hhbmdl Cj4gYWRkcyB2bXgvc3ZtIHN1cHBvcnQgdG8gZW5zdXJlIHRoZSBwZXJtaXNzaW9uIGJpdG1hcCBp cyBwcm9wZXJseSBzZXQgdG8KPiBjYXVzZSBhIHZtX2V4aXQgdG8gdGhlIGhvc3Qgd2hlbiByZG1z ciBvciB3cm1zciBpcyB1c2VkIGJ5IG9uZSBvZiB0aGUKPiB1c2Vyc3BhY2UgdHJhY2tlZCBNU1Jz LiAgQWxzbywgdG8gYXZvaWQgcmVwZWF0ZWRseSBzZXR0aW5nIHRoZW0sCj4ga3ZtX21ha2VfcmVx dWVzdCgpIGlzIHVzZWQgdG8gY29hbGVzY2UgdGhlc2UgaW50byBhIHNpbmdsZSBjYWxsLgo+IAo+ IFNpZ25lZC1vZmYtYnk6IEFhcm9uIExld2lzIDxhYXJvbmxld2lzQGdvb2dsZS5jb20+Cj4gUmV2 aWV3ZWQtYnk6IE9saXZlciBVcHRvbiA8b3VwdG9uQGdvb2dsZS5jb20+CgpUaGlzIGlzIGluY29t cGxldGUsIGFzIGl0IGRvZXNuJ3QgY292ZXIgYWxsIG9mIHRoZSB4MmFwaWMgcmVnaXN0ZXJzLiAK VGhlcmUgYXJlIGFsc28gYSBmZXcgTVNScyB0aGF0IElJUkMgYXJlIGhhbmRsZWQgZGlmZmVyZW50 bHkgZnJvbSB0aGlzIApsb2dpYywgc3VjaCBhcyBFRkVSLgoKSSdtIHJlYWxseSBjdXJpb3VzIGlm IHRoaXMgaXMgd29ydGggdGhlIGVmZm9ydD8gSSB3b3VsZCBiZSBpbmNsaW5lZCB0byAKc2F5IHRo YXQgTVNScyB0aGF0IEtWTSBoYXMgZGlyZWN0IGFjY2VzcyBmb3IgbmVlZCBzcGVjaWFsIGhhbmRs aW5nIG9uZSAKd2F5IG9yIGFub3RoZXIuCgoKQWxleAoKCgpBbWF6b24gRGV2ZWxvcG1lbnQgQ2Vu dGVyIEdlcm1hbnkgR21iSApLcmF1c2Vuc3RyLiAzOAoxMDExNyBCZXJsaW4KR2VzY2hhZWZ0c2Z1 ZWhydW5nOiBDaHJpc3RpYW4gU2NobGFlZ2VyLCBKb25hdGhhbiBXZWlzcwpFaW5nZXRyYWdlbiBh bSBBbXRzZ2VyaWNodCBDaGFybG90dGVuYnVyZyB1bnRlciBIUkIgMTQ5MTczIEIKU2l0ejogQmVy bGluClVzdC1JRDogREUgMjg5IDIzNyA4NzkKCgo=