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Thu, 3 Jun 2021 23:33:05 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UCswRev3Mzsf; Thu, 3 Jun 2021 23:33:04 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by smtp3.osuosl.org (Postfix) with ESMTPS id 7E26E608E1; Thu, 3 Jun 2021 23:33:04 +0000 (UTC) IronPort-SDR: 8LU5fo2lB40PXFvVhxmcQNLg2iJVMgdJI78O165E3XukC9Lf+8mnn828yDScRVKjt507zaIF5S al2VdVKzuhYQ== X-IronPort-AV: E=McAfee;i="6200,9189,10004"; a="202320922" X-IronPort-AV: E=Sophos;i="5.83,246,1616482800"; d="scan'208";a="202320922" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Jun 2021 16:33:00 -0700 IronPort-SDR: qAh/G4h1oAVmxnpXqZzvzXCuEocjpQVTLKofsVYdH1zoxAHAjOZW/w7M8EFkVDo5EB13y1/Kmd 5P5MI2NAPGSw== X-IronPort-AV: E=Sophos;i="5.83,246,1616482800"; d="scan'208";a="550880326" Received: from akleen-mobl1.amr.corp.intel.com (HELO [10.209.7.237]) ([10.209.7.237]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Jun 2021 16:32:59 -0700 Subject: Re: [PATCH v1 1/8] virtio: Force only split mode with protected guest To: Andy Lutomirski , mst@redhat.com References: <20210603004133.4079390-1-ak@linux.intel.com> <20210603004133.4079390-2-ak@linux.intel.com> <2b2dec75-a0c1-4013-ac49-a49f30d5ac3c@www.fastmail.com> <3159e1f4-77cd-e071-b6f2-a2bb83cfc69a@linux.intel.com> From: Andi Kleen Message-ID: <884f34e0-fcd2-bb82-9e9e-4269823fa9b2@linux.intel.com> Date: Thu, 3 Jun 2021 16:32:58 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: Jason Wang , the arch/x86 maintainers , Linux Kernel Mailing List , virtualization@lists.linux-foundation.org, iommu@lists.linux-foundation.org, Josh Poimboeuf , robin.murphy@arm.com, hch@lst.de X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Cj4gV2UgZG8gbm90IG5lZWQgYW4gaW5jcmVhc2luZyBwaWxlIG9mIGtsdWRnZXMKCkRvIHlvdSBt ZWFuIGRpc2FibGluZyBmZWF0dXJlcyBpcyBhIGtsdWRnZT8KCklmIHllcyBJIGRpc2FncmVlIHdp dGggdGhhdCBjaGFyYWN0ZXJpemF0aW9uLgoKCj4gdG8gbWFrZSBURFggYW5kIFNFViDigJxzZWN1 cmXigJ0uICBXZSBuZWVkIHRoZSBhY3R1YWwgbG9hZGVkIGRyaXZlciB0byBiZSBzZWN1cmUuICBU aGUgdmlydGlvIGFyY2hpdGVjdHVyZSBpcyBmdWxsIG9mIGxlZ2FjeSBub25zZW5zZSwKPiBhbmQg dGhlcmUgaXMgbm8gZ29vZCByZWFzb24gZm9yIFNFViBhbmQgVERYIHRvIGJlIGEgZ2lhbnQgc3Bl Y2lhbCBjYXNlLgoKSSBkb24ndCBrbm93IHdoZXJlIHlvdSBzZWUgYSAiZ2lhbnQgc3BlY2lhbCBj YXNlIi4gRXhjZXB0IGZvciB0aGUgCmxpbWl0ZWQgZmVhdHVyZSBuZWdvdGlhdGlvbiBhbGwgdGhl IGNoYW5nZXMgYXJlIGNvbW1vbiwgYW5kIHRoZSAKZGlzYWJsaW5nIG9mIGZlYXR1cmVzICh3aGlj aCBpcyBub3QgbmV3IEJUVywgYnV0IGFscmVhZHkgZG9uZSBlLmcuIHdpdGggCmZvcmNpbmcgRE1B IEFQSSBpbiBzb21lIGNhc2VzKSBjYW4gYmUgb2YgY291cnNlIHVzZWQgYnkgYWxsIHRoZXNlIG90 aGVyIAp0ZWNobm9sb2dpZXMgdG9vLiBCdXQgaXQganVzdCBjYW5ub3QgYmUgZG9uZSBieSBkZWZh dWx0IGZvciBldmVyeXRoaW5nIApiZWNhdXNlIGl0IHdvdWxkIGJyZWFrIGNvbXBhdGliaWxpdHku IFNvIGV2ZXJ5IHRlY2hub2xvZ3kgd2l0aCBzdWNoIApyZXF1aXJlbWVudHMgaGFzIHRvIGV4cGxp Y2l0bHkgb3B0LWluLgoKCj4KPiBBcyBJIHNhaWQgYmVmb3JlLCByZWFsIFBDSWUgKFRodW5kZXJi b2x0L1VTQi1DIG9yIGFueXRoaW5nIGVsc2UpIGhhcyB0aGUgZXhhY3Qgc2FtZSBwcm9ibGVtLiAg VGhlIGZhY3QgdGhhdCBURFggaGFzIGVuY3J5cHRlZCBtZW1vcnkgaXMsIGF0IGJlc3QsIGEgcG9v ciBwcm94eSBmb3IgdGhlIGFjdHVhbCBjb25kaXRpb24uICBUaGUgYWN0dWFsIGNvbmRpdGlvbiBp cyB0aGF0IHRoZSBob3N0IGRvZXMgbm90IHRydXN0IHRoZSBkZXZpY2UgdG8gaW1wbGVtZW50IHRo ZSB2aXJ0aW8gcHJvdG9jb2wgY29ycmVjdGx5LgoKUmlnaHQgdGhleSBjYW4gZG8gc2ltaWxhciBs aW1pdGF0aW9ucyBvZiBmZWF0dXJlIHNldHMuIEJ1dCBhZ2FpbiBpdCAKY2Fubm90IGJlIGRlZmF1 bHQuCgoKPgo+Pgo+PiBURFggYW5kIFNFViB1c2UgdGhlIGFyY2ggaG9vayB0byBlbmZvcmNlIERN QSBBUEksIHNvIHRoYXQgcGFydCBpcyBhbHNvCj4+IHNvbHZlZC4KPj4KPiBDYW4geW91IHBvaW50 IG1lIHRvIHRoZSBjb2RlIHlvdeKAmXJlIHJlZmVycmluZyB0bz8KClNlZSA0LzggaW4gdGhpcyBw YXRjaCBraXQuIEl0IHVzZXMgYW4gZXhpc3RpbmcgaG9vayB3aGljaCBpcyBhbHJlYWR5IAp1c2Vk IGluIHRyZWUgYnkgczM5MC4KCgotQW5kaQoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgt Zm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4v bGlzdGluZm8vaW9tbXU=