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Wed, 16 Sep 2020 20:36:14 +0000 Received: from freeip.amazon.com (10.43.161.237) by EX13D20UWC001.ant.amazon.com (10.43.162.244) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 16 Sep 2020 20:36:10 +0000 Subject: Re: [PATCH v6 5/7] KVM: x86: VMX: Prevent MSR passthrough when MSR access is denied To: Aaron Lewis CC: Paolo Bonzini , Jonathan Corbet , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , KarimAllah Raslan , Dan Carpenter , kvm list , , References: <20200902125935.20646-1-graf@amazon.com> <20200902125935.20646-6-graf@amazon.com> From: Alexander Graf Message-ID: Date: Wed, 16 Sep 2020 22:36:08 +0200 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:78.0) Gecko/20100101 Thunderbird/78.2.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [10.43.161.237] X-ClientProxiedBy: EX13D44UWB001.ant.amazon.com (10.43.161.32) To EX13D20UWC001.ant.amazon.com (10.43.162.244) Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: base64 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org CgpPbiAxNi4wOS4yMCAyMjoxMywgQWFyb24gTGV3aXMgd3JvdGU6Cj4gCj4+Pgo+Pj4+ICsKPj4+ PiAgICAvKgo+Pj4+ICAgICAqIFRoZXNlIDIgcGFyYW1ldGVycyBhcmUgdXNlZCB0byBjb25maWcg dGhlIGNvbnRyb2xzIGZvciBQYXVzZS1Mb29wIEV4aXRpbmc6Cj4+Pj4gICAgICogcGxlX2dhcDog ICAgdXBwZXIgYm91bmQgb24gdGhlIGFtb3VudCBvZiB0aW1lIGJldHdlZW4gdHdvIHN1Y2Nlc3Np dmUKPj4+PiBAQCAtNjIyLDYgKzY0Miw0MSBAQCBzdGF0aWMgaW5saW5lIGJvb2wgcmVwb3J0X2Zs ZXhwcmlvcml0eSh2b2lkKQo+Pj4+ICAgICAgICAgICByZXR1cm4gZmxleHByaW9yaXR5X2VuYWJs ZWQ7Cj4+Pj4gICAgfQo+Pj4KPj4+IE9uZSB0aGluZyB0aGF0IHNlZW1zIHRvIGJlIG1pc3Npbmcg aXMgcmVtb3ZpbmcgTVNScyBmcm9tIHRoZQo+Pj4gcGVybWlzc2lvbiBiaXRtYXAgb3IgcmVzZXR0 aW5nIHRoZSBwZXJtaXNzaW9uIGJpdG1hcCB0byBpdHMgb3JpZ2luYWwKPj4+IHN0YXRlIGJlZm9y ZSBhZGRpbmcgY2hhbmdlcyBvbiB0b3Agb2YgaXQuICBUaGlzIHdvdWxkIGJlIG5lZWRlZCBvbgo+ Pj4gc3Vic2VxdWVudCBjYWxscyB0byBrdm1fdm1faW9jdGxfc2V0X21zcl9maWx0ZXIoKS4gIFdo ZW4gdGhhdCBoYXBwZW5zCj4+PiB0aGUgb3JpZ2luYWwgY2hhbmdlcyBtYWRlIGJ5IEtWTV9SRVFf TVNSX0ZJTFRFUl9DSEFOR0VEIG5lZWQgdG8gYmUKPj4+IGJhY2tlZCBvdXQgYmVmb3JlIGFwcGx5 aW5nIHRoZSBuZXcgc2V0Lgo+Pgo+PiBJJ20gbm90IHN1cmUgSSBmb2xsb3cuIFN1YnNlcXVlbnQg Y2FsbHMgdG8gc2V0X21zcl9maWx0ZXIoKSB3aWxsIGludm9rZQo+PiB0aGUgInBsZWFzZSByZXNl dCB0aGUgd2hvbGUgTVNSIHBhc3N0aHJvdWdoIGJpdG1hcCB0byBhIGNvbnNpc3RlbnQKPj4gc3Rh dGUiIHdoaWNoIHdpbGwgdGhlbiByZWFwcGx5IHRoZSBpbi1rdm0gZGVzaXJlZCBzdGF0ZSB0aHJv dWdoIHRoZQo+PiBiaXRtYXAgYW5kIGZpbHRlciBzdGF0ZSBvbiB0b3Agb24gZWFjaCBvZiB0aG9z ZS4KPj4KPiAKPiBZZXMsIHlvdSdyZSBjb3JyZWN0LiAgSSBkaXNjb3ZlcmVkIHRoaXMgYWZ0ZXIg dGhlIGZhY3QgYnkgYWRkaW5nIGEKPiB0ZXN0IHRvIHRoZSBzZWxmdGVzdCBJIHdyb3RlIGZvciB0 aGUgZGVueSBsaXN0IHN5c3RlbSB3aGljaCBJIHJldmFtcGVkCj4gdG8gd29yayBmb3IgeW91ciBm aWx0ZXIgc3lzdGVtLiAgSXQgcHJvdmVkIHRoZSBwZXJtaXNzaW9uIGJpdG1hcHMgYXJlCj4gaW4g ZmFjdCBzZXQgYXMgZXhwZWN0ZWQgb24gc3Vic2VxdWVudCBjYWxscy4gIFlvdSBjYW4gZGlzcmVn YXJkIHRoaXMKPiBjb21tZW50Lgo+IAo+IEFzIGEgc2lkZSBub3RlLCBJJ20gaGFwcHkgdG8gc2hh cmUgdGhlIHRlc3QgaWYgeW91J2QgbGlrZS4gSSBhbHNvIHVzZWQKPiBpdCB0byB1bmNvdmVyIGFu IGlzc3VlIGluIHRoZSBmaXJzdCBjb21taXQgb2YgdGhpcyBzZXJpZXMuCgpJIHJlYWxseSBlbmpv eSB0aGUgdGVzdHMgdGhhdCB5b3Ugc3VibWl0dGVkIGFuZCB3b3VsZCBsb3ZlIHRvIHNlZSB5b3Ug CmFkZCB5b3VyIHRlc3QgY292ZXJhZ2UgdG8gdGhlIGZpbHRlcmluZyBwYXRjaCBzZXQgOikKCgpU aGFua3MhCgpBbGV4CgoKCgpBbWF6b24gRGV2ZWxvcG1lbnQgQ2VudGVyIEdlcm1hbnkgR21iSApL cmF1c2Vuc3RyLiAzOAoxMDExNyBCZXJsaW4KR2VzY2hhZWZ0c2Z1ZWhydW5nOiBDaHJpc3RpYW4g U2NobGFlZ2VyLCBKb25hdGhhbiBXZWlzcwpFaW5nZXRyYWdlbiBhbSBBbXRzZ2VyaWNodCBDaGFy bG90dGVuYnVyZyB1bnRlciBIUkIgMTQ5MTczIEIKU2l0ejogQmVybGluClVzdC1JRDogREUgMjg5 IDIzNyA4NzkKCgo=