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Tsirkin" , virtualization@lists.linux-foundation.org, Robert Buhren , iommu@lists.linux-foundation.org, "Morbitzer, Mathias" 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" Ck9uIDIwMjAvMTIvMTUg5LiK5Y2INTo0OSwgS29ucmFkIFJ6ZXN6dXRlayBXaWxrIHdyb3RlOgo+ IE9uIEZyaSwgRGVjIDExLCAyMDIwIGF0IDA2OjMxOjIxUE0gKzAxMDAsIEZlbGljaXRhcyBIZXR6 ZWx0IHdyb3RlOgo+PiBIZWxsbywKPiBIaSEgUGxlYXNlIHNlZSBiZWxvdyBteSByZXNwb25zZXMu Cj4KPj4gd2UgaGF2ZSBiZWVuIGFuYWx5emluZyB0aGUgSHlwZXJ2aXNvci1PUyBpbnRlcmZhY2Ug b2YgTGludXgKPj4gYW5kIGRpc2NvdmVyZWQgYnVncyBpbiB0aGUgc3dpb3RsYi92aXJ0aW8gaW1w bGVtZW50YXRpb24gdGhhdCBjYW4gYmUKPj4gdHJpZ2dlcmVkIGZyb20gYSBtYWxpY2lvdXMgSHlw ZXJ2aXNvciAvIHZpcnR1YWwgZGV2aWNlLgo+PiBXaXRoIFNFViwgdGhlIFNXSU9UTEIgaW1wbGVt ZW50YXRpb24gaXMgZm9yY2VmdWxseSBlbmFibGVkIGFuZCB3b3VsZAo+PiBhbHdheXMgYmUgdXNl ZC4gVGh1cywgYWxsIHZpcnRpbyBkZXZpY2VzIGFuZCBvdGhlcnMgd291bGQgdXNlIGl0IHVuZGVy Cj4+IHRoZSBob29kLgo+Pgo+PiBUaGUgcmVhc29uIGZvciBhbmFseXppbmcgdGhpcyBpbnRlcmZh Y2UgaXMgdGhhdCwgdGVjaG5vbG9naWVzIHN1Y2ggYXMKPj4gSW50ZWwncyBUcnVzdGVkIERvbWFp biBFeHRlbnNpb25zIFsxXSBhbmQgQU1EJ3MgU2VjdXJlIE5lc3RlZCBQYWdpbmcgWzJdCj4+IGNo YW5nZSB0aGUgdGhyZWF0IG1vZGVsIGFzc3VtZWQgYnkgdmFyaW91cyBMaW51eCBrZXJuZWwgc3Vi c3lzdGVtcy4KPj4gVGhlc2UgdGVjaG5vbG9naWVzIHRha2UgdGhlIHByZXNlbmNlIG9mIGEgZnVs bHkgbWFsaWNpb3VzIGh5cGVydmlzb3IKPj4gaW50byBhY2NvdW50IGFuZCBhaW0gdG8gcHJvdmlk ZSBwcm90ZWN0aW9uIGZvciB2aXJ0dWFsIG1hY2hpbmVzIGluIHN1Y2gKPj4gYW4gZW52aXJvbm1l bnQuIFRoZXJlZm9yZSwgYWxsIGlucHV0IHJlY2VpdmVkIGZyb20gdGhlIGh5cGVydmlzb3Igb3Ig YW4KPj4gZXh0ZXJuYWwgZGV2aWNlIHNob3VsZCBiZSBjYXJlZnVsbHkgdmFsaWRhdGVkLiBOb3Rl IHRoYXQgdGhlc2UgaXNzdWVzCj4+IGFyZSBvZiBsaXR0bGUgKG9yIG5vKSByZWxldmFuY2UgaW4g YSAibm9ybWFsIiB2aXJ0dWFsaXphdGlvbiBzZXR1cCwKPj4gbmV2ZXJ0aGVsZXNzIHdlIGJlbGll dmUgdGhhdCBpdCBpcyByZXF1aXJlZCB0byBmaXggdGhlbSBpZiBURFggb3IgU05QIGlzCj4+IHVz ZWQuCj4+Cj4+IFdlIGFyZSBoYXBweSB0byBwcm92aWRlIG1vcmUgaW5mb3JtYXRpb24gaWYgbmVl ZGVkIQo+Pgo+PiBbMV0KPj4gaHR0cHM6Ly9zb2Z0d2FyZS5pbnRlbC5jb20vY29udGVudC93d3cv dXMvZW4vZGV2ZWxvcC9hcnRpY2xlcy9pbnRlbC10cnVzdC1kb21haW4tZXh0ZW5zaW9ucy5odG1s Cj4+Cj4+IFsyXWh0dHBzOi8vd3d3LmFtZC5jb20vZW4vcHJvY2Vzc29ycy9hbWQtc2VjdXJlLWVu Y3J5cHRlZC12aXJ0dWFsaXphdGlvbgo+Pgo+PiBCdWc6Cj4+IE9PQiBtZW1vcnkgd3JpdGUuCj4+ IGRtYV91bm1hcF9zaW5nbGUgLT4gc3dpb3RsYl90YmxfdW5tYXBfc2luZ2xlIGlzIGludm9rZWQg d2l0aCBkbWFfYWRkcgo+PiBhbmQgbGVuZ3RoIHBhcmFtZXRlcnMgdGhhdCBhcmUgdW5kZXIgY29u dHJvbCBvZiB0aGUgZGV2aWNlLgo+PiBUaGlzIGhhcHBlbnMgZS5nLiBpbiB2aXJ0aW9fcmluZzoK Pj4gaHR0cHM6Ly9lbGl4aXIuYm9vdGxpbi5jb20vbGludXgvdjUuMTAtcmM3L3NvdXJjZS9kcml2 ZXJzL3ZpcnRpby92aXJ0aW9fcmluZy5jI0wzNzgKPiBIZXlhIQo+Cj4gVGhhbmsgeW91IGZvciBw b2ludGluZyB0aGlzIG91dCEgSSd2ZSBhIGNvdXBsZSBvZiBxdWVzdGlvbnMgYW5kIGhvcGUgeW91 IGNhbgo+IGhlbHAgbWUgb3V0IHdpdGggdGhlbS4KPgo+IEFsc28gQ0MtaW5nIEFNRCAvIFREWCBm b2xrcy4KPj4gVGhpcyByYWlzZXMgdHdvIGlzc3VlczoKPj4gMSkgc3dpb3RsYl90bGJfdW5tYXBf c2luZ2xlIGZhaWxzIHRvIGNoZWNrIHdoZXRoZXIgdGhlIGluZGV4IGdlbmVyYXRlZAo+PiBmcm9t IHRoZSBkbWFfYWRkciBpcyBpbiByYW5nZSBvZiB0aGUgaW9fdGxiX29yaWdfYWRkciBhcnJheS4K PiBUaGF0IGlzIGZhaXJseSBzaW1wbGUgdG8gaW1wbGVtZW50IEkgd291bGQgdGhpbmsuIFRoYXQg aXMgaXQgY2FuIGNoZWNrCj4gdGhhdCB0aGUgZG1hX2FkZHIgaXMgZnJvbSB0aGUgUEEgaW4gdGhl IGlvX3RsYiBwb29sIHdoZW4gU1dJT1RMQj1mb3JjZQo+IGlzIHVzZWQuCgoKSSdtIG5vdCBzdXJl IHRoaXMgY2FuIGZpeCBhbGwgdGhlIGNhc2VzLiBJdCBsb29rcyB0byBtZSB3ZSBzaG91bGQgbWFw IApkZXNjcmlwdG9yIGNvaGVyZW50IGJ1dCByZWFkb25seSAod2hpY2ggaXMgbm90IHN1cHBvcnRl ZCBieSBjdXJyZW50IERNQSAKQVBJKS4KCk90aGVyd2lzZSwgZGV2aWNlIGNhbiBtb2RpZnkgdGhl IGRlc2NbaV0uYWRkci9kZXNjW2ldLmxlbiBhdCBhbnkgdGltZSB0byAKcHJldGVuZCBhIHZhbGlk IG1hcHBpbmcuCgpUaGFua3MKCgo+CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRh dGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGlu Zm8vaW9tbXU= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97F3EC4361B for ; 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Tue, 15 Dec 2020 03:20:58 +0000 (UTC) Received: from [10.72.13.123] (ovpn-13-123.pek2.redhat.com [10.72.13.123]) by smtp.corp.redhat.com (Postfix) with ESMTP id E163D5D9DC; Tue, 15 Dec 2020 03:20:49 +0000 (UTC) Subject: Re: swiotlb/virtio: unchecked device dma address and length To: Konrad Rzeszutek Wilk , Felicitas Hetzelt , ashish.kalra@amd.com, jun.nakajima@intel.com, hch@lst.de References: <20201214214950.GC18103@char.us.oracle.com> From: Jason Wang Message-ID: Date: Tue, 15 Dec 2020 11:20:48 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201214214950.GC18103@char.us.oracle.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Cc: "Radev, Martin" , david.kaplan@amd.com, "Michael S. Tsirkin" , virtualization@lists.linux-foundation.org, Robert Buhren , iommu@lists.linux-foundation.org, "Morbitzer, Mathias" X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization 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: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Ck9uIDIwMjAvMTIvMTUg5LiK5Y2INTo0OSwgS29ucmFkIFJ6ZXN6dXRlayBXaWxrIHdyb3RlOgo+ IE9uIEZyaSwgRGVjIDExLCAyMDIwIGF0IDA2OjMxOjIxUE0gKzAxMDAsIEZlbGljaXRhcyBIZXR6 ZWx0IHdyb3RlOgo+PiBIZWxsbywKPiBIaSEgUGxlYXNlIHNlZSBiZWxvdyBteSByZXNwb25zZXMu Cj4KPj4gd2UgaGF2ZSBiZWVuIGFuYWx5emluZyB0aGUgSHlwZXJ2aXNvci1PUyBpbnRlcmZhY2Ug b2YgTGludXgKPj4gYW5kIGRpc2NvdmVyZWQgYnVncyBpbiB0aGUgc3dpb3RsYi92aXJ0aW8gaW1w bGVtZW50YXRpb24gdGhhdCBjYW4gYmUKPj4gdHJpZ2dlcmVkIGZyb20gYSBtYWxpY2lvdXMgSHlw ZXJ2aXNvciAvIHZpcnR1YWwgZGV2aWNlLgo+PiBXaXRoIFNFViwgdGhlIFNXSU9UTEIgaW1wbGVt ZW50YXRpb24gaXMgZm9yY2VmdWxseSBlbmFibGVkIGFuZCB3b3VsZAo+PiBhbHdheXMgYmUgdXNl ZC4gVGh1cywgYWxsIHZpcnRpbyBkZXZpY2VzIGFuZCBvdGhlcnMgd291bGQgdXNlIGl0IHVuZGVy Cj4+IHRoZSBob29kLgo+Pgo+PiBUaGUgcmVhc29uIGZvciBhbmFseXppbmcgdGhpcyBpbnRlcmZh Y2UgaXMgdGhhdCwgdGVjaG5vbG9naWVzIHN1Y2ggYXMKPj4gSW50ZWwncyBUcnVzdGVkIERvbWFp biBFeHRlbnNpb25zIFsxXSBhbmQgQU1EJ3MgU2VjdXJlIE5lc3RlZCBQYWdpbmcgWzJdCj4+IGNo YW5nZSB0aGUgdGhyZWF0IG1vZGVsIGFzc3VtZWQgYnkgdmFyaW91cyBMaW51eCBrZXJuZWwgc3Vi c3lzdGVtcy4KPj4gVGhlc2UgdGVjaG5vbG9naWVzIHRha2UgdGhlIHByZXNlbmNlIG9mIGEgZnVs bHkgbWFsaWNpb3VzIGh5cGVydmlzb3IKPj4gaW50byBhY2NvdW50IGFuZCBhaW0gdG8gcHJvdmlk ZSBwcm90ZWN0aW9uIGZvciB2aXJ0dWFsIG1hY2hpbmVzIGluIHN1Y2gKPj4gYW4gZW52aXJvbm1l bnQuIFRoZXJlZm9yZSwgYWxsIGlucHV0IHJlY2VpdmVkIGZyb20gdGhlIGh5cGVydmlzb3Igb3Ig YW4KPj4gZXh0ZXJuYWwgZGV2aWNlIHNob3VsZCBiZSBjYXJlZnVsbHkgdmFsaWRhdGVkLiBOb3Rl IHRoYXQgdGhlc2UgaXNzdWVzCj4+IGFyZSBvZiBsaXR0bGUgKG9yIG5vKSByZWxldmFuY2UgaW4g YSAibm9ybWFsIiB2aXJ0dWFsaXphdGlvbiBzZXR1cCwKPj4gbmV2ZXJ0aGVsZXNzIHdlIGJlbGll dmUgdGhhdCBpdCBpcyByZXF1aXJlZCB0byBmaXggdGhlbSBpZiBURFggb3IgU05QIGlzCj4+IHVz ZWQuCj4+Cj4+IFdlIGFyZSBoYXBweSB0byBwcm92aWRlIG1vcmUgaW5mb3JtYXRpb24gaWYgbmVl ZGVkIQo+Pgo+PiBbMV0KPj4gaHR0cHM6Ly9zb2Z0d2FyZS5pbnRlbC5jb20vY29udGVudC93d3cv dXMvZW4vZGV2ZWxvcC9hcnRpY2xlcy9pbnRlbC10cnVzdC1kb21haW4tZXh0ZW5zaW9ucy5odG1s Cj4+Cj4+IFsyXWh0dHBzOi8vd3d3LmFtZC5jb20vZW4vcHJvY2Vzc29ycy9hbWQtc2VjdXJlLWVu Y3J5cHRlZC12aXJ0dWFsaXphdGlvbgo+Pgo+PiBCdWc6Cj4+IE9PQiBtZW1vcnkgd3JpdGUuCj4+ IGRtYV91bm1hcF9zaW5nbGUgLT4gc3dpb3RsYl90YmxfdW5tYXBfc2luZ2xlIGlzIGludm9rZWQg d2l0aCBkbWFfYWRkcgo+PiBhbmQgbGVuZ3RoIHBhcmFtZXRlcnMgdGhhdCBhcmUgdW5kZXIgY29u dHJvbCBvZiB0aGUgZGV2aWNlLgo+PiBUaGlzIGhhcHBlbnMgZS5nLiBpbiB2aXJ0aW9fcmluZzoK Pj4gaHR0cHM6Ly9lbGl4aXIuYm9vdGxpbi5jb20vbGludXgvdjUuMTAtcmM3L3NvdXJjZS9kcml2 ZXJzL3ZpcnRpby92aXJ0aW9fcmluZy5jI0wzNzgKPiBIZXlhIQo+Cj4gVGhhbmsgeW91IGZvciBw b2ludGluZyB0aGlzIG91dCEgSSd2ZSBhIGNvdXBsZSBvZiBxdWVzdGlvbnMgYW5kIGhvcGUgeW91 IGNhbgo+IGhlbHAgbWUgb3V0IHdpdGggdGhlbS4KPgo+IEFsc28gQ0MtaW5nIEFNRCAvIFREWCBm b2xrcy4KPj4gVGhpcyByYWlzZXMgdHdvIGlzc3VlczoKPj4gMSkgc3dpb3RsYl90bGJfdW5tYXBf c2luZ2xlIGZhaWxzIHRvIGNoZWNrIHdoZXRoZXIgdGhlIGluZGV4IGdlbmVyYXRlZAo+PiBmcm9t IHRoZSBkbWFfYWRkciBpcyBpbiByYW5nZSBvZiB0aGUgaW9fdGxiX29yaWdfYWRkciBhcnJheS4K PiBUaGF0IGlzIGZhaXJseSBzaW1wbGUgdG8gaW1wbGVtZW50IEkgd291bGQgdGhpbmsuIFRoYXQg aXMgaXQgY2FuIGNoZWNrCj4gdGhhdCB0aGUgZG1hX2FkZHIgaXMgZnJvbSB0aGUgUEEgaW4gdGhl IGlvX3RsYiBwb29sIHdoZW4gU1dJT1RMQj1mb3JjZQo+IGlzIHVzZWQuCgoKSSdtIG5vdCBzdXJl IHRoaXMgY2FuIGZpeCBhbGwgdGhlIGNhc2VzLiBJdCBsb29rcyB0byBtZSB3ZSBzaG91bGQgbWFw IApkZXNjcmlwdG9yIGNvaGVyZW50IGJ1dCByZWFkb25seSAod2hpY2ggaXMgbm90IHN1cHBvcnRl ZCBieSBjdXJyZW50IERNQSAKQVBJKS4KCk90aGVyd2lzZSwgZGV2aWNlIGNhbiBtb2RpZnkgdGhl IGRlc2NbaV0uYWRkci9kZXNjW2ldLmxlbiBhdCBhbnkgdGltZSB0byAKcHJldGVuZCBhIHZhbGlk IG1hcHBpbmcuCgpUaGFua3MKCgo+CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRpb25A bGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24u b3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=