From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: Discussion about virtual iommu support for Xen guest Date: Thu, 26 May 2016 12:35:47 +0100 Message-ID: <5746DF93.8090803@citrix.com> References: <5746B3FA.6020401@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <5746B3FA.6020401@intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Lan Tianyu , jbeulich@suse.com, sstabellini@kernel.org, ian.jackson@eu.citrix.com, xen-devel@lists.xensource.com, kevin.tian@intel.com, "Dong, Eddie" , "Nakajima, Jun" , yang.zhang.wz@gmail.com, anthony.perard@citrix.com List-Id: xen-devel@lists.xenproject.org T24gMjYvMDUvMTYgMDk6MjksIExhbiBUaWFueXUgd3JvdGU6Cj4gSGkgQWxsOgo+IFdlIHRyeSBw dXNoaW5nIHZpcnR1YWwgaW9tbXUgc3VwcG9ydCBmb3IgWGVuIGd1ZXN0IGFuZCB0aGVyZSBhcmUg c29tZQo+IGZlYXR1cmVzIGJsb2NrZWQgYnkgaXQuCj4KPiBNb3RpdmF0aW9uOgo+IC0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tCj4gMSkgQWRkIFNWTShTaGFyZWQgVmlydHVhbCBNZW1vcnkpIHN1cHBv cnQgZm9yIFhlbiBndWVzdAo+IFRvIHN1cHBvcnQgaUdGWCBwYXNzLXRocm91Z2ggZm9yIFNWTSBl bmFibGVkIGRldmljZXMsIGl0IHJlcXVpcmVzCj4gdmlydHVhbCBpb21tdSBzdXBwb3J0IHRvIGVt dWxhdGUgcmVsYXRlZCByZWdpc3RlcnMgYW5kIGludGVyY2VwdC9oYW5kbGUKPiBndWVzdCBTVk0g Y29uZmlndXJlIGluIHRoZSBWTU0uCj4KPiAyKSBJbmNyZWFzZSBtYXggdmNwdSBzdXBwb3J0IGZv ciBvbmUgVk0uCj4KPiBTbyBmYXIsIG1heCB2Y3B1IGZvciBYZW4gaHZtIGd1ZXN0IGlzIDEyOC4g Rm9yIEhQQyhIaWdoIFBlcmZvcm1hbmNlCj4gQ29tcHV0aW5nKSBjbG91ZCBjb21wdXRpbmcsIGl0 IHJlcXVpcmVzIG1vcmUgdmNwdXMgc3VwcG9ydCBpbiBhIHNpbmdsZQo+IFZNLiBUaGUgdXNhZ2Ug bW9kZWwgaXMgdG8gY3JlYXRlIGp1c3Qgb25lIFZNIG9uIGEgbWFjaGluZSB3aXRoIHRoZQo+IHNh bWUgbnVtYmVyIHZjcHVzIGFzIGxvZ2ljYWwgY3B1cyBvbiB0aGUgaG9zdCBhbmQgcGluIHZjcHUg b24gZWFjaAo+IGxvZ2ljYWwgY3B1IGluIG9yZGVyIHRvIGdldCBnb29kIGNvbXB1dGUgcGVyZm9y bWFuY2UuCj4KPiBJbnRlbCBYZW9uIHBoaSBLTkwoS25pZ2h0cyBMYW5kaW5nKSBpcyBkZWRpY2F0 ZWQgdG8gSFBDIG1hcmtldCBhbmQKPiBzdXBwb3J0cyAyODggbG9naWNhbCBjcHVzLiBTbyB3ZSBo b3BlIFZNIGNhbiBzdXBwb3J0IDI4OCB2Y3B1Cj4gdG8gbWVldCBIUEMgcmVxdWlyZW1lbnQuCj4K PiBDdXJyZW50IExpbnV4IGtlcm5lbCByZXF1aXJlcyBJUihpbnRlcnJ1cHQgcmVtYXBwaW5nKSB3 aGVuIE1BWCBBUElDCj4gSUQgaXMgPiAyNTUgYmVjYXVzZSBpbnRlcnJ1cHQgb25seSBjYW4gYmUg ZGVsaXZlcmVkIGFtb25nIDB+MjU1IGNwdXMKPiB3aXRob3V0IElSLiBJUiBpbiBWTSByZWxpZXMg b24gdGhlIHZpcnR1YWwgaW9tbXUgc3VwcG9ydC4KPgo+IEtWTSBWaXJ0dWFsIGlvbW11IHN1cHBv cnQgc3RhdHVzCj4gLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tCj4gQ3VycmVudCwgUWVtdSBoYXMg YSBiYXNpYyB2aXJ0dWFsIGlvbW11IHRvIGRvIGFkZHJlc3MgdHJhbnNsYXRpb24gZm9yCj4gdmly dHVhbCBkZXZpY2UgYW5kIGl0IG9ubHkgd29ya3MgZm9yIHRoZSBRMzUgbWFjaGluZSB0eXBlLiBL Vk0gcmV1c2VzIGl0Cj4gYW5kIFJlZGhhdCBpcyBhZGRpbmcgSVIgdG8gc3VwcG9ydCBtb3JlIHRo YW4gMjU1IHZjcHVzLgo+Cj4gSG93IHRvIGFkZCB2aXJ0dWFsIGlvbW11IGZvciBYZW4/Cj4gLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLQo+IEZpcnN0IGlkZWEgY2FtZSB0byBteSBtaW5kIGlzIHRv IHJldXNlIFFlbXUgdmlydHVhbCBpb21tdSBidXQgWGVuIGRpZG4ndAo+IHN1cHBvcnQgUTM1IHNv IGZhci4gRW5hYmxpbmcgUTM1IGZvciBYZW4gc2VlbXMgbm90IGEgc2hvcnQgdGVybSB0YXNrLgo+ IEFudGhvbnkgZGlkIHNvbWUgcmVsYXRlZCBqb2JzIGJlZm9yZS4KPgo+IEknZCBsaWtlIHRvIHNl ZSB5b3VyIGNvbW1lbnRzIGFib3V0IGhvdyB0byBpbXBsZW1lbnQgdmlydHVhbCBpb21tdSBmb3Ig WGVuLgo+Cj4gMSkgUmV1c2UgUWVtdSB2aXJ0dWFsIGlvbW11IG9yIHdyaXRlIGEgc2VwYXJhdGUg b25lIGZvciBYZW4/Cj4gMikgRW5hYmxlIFEzNSBmb3IgWGVuIHRvIHJldXNlIFFlbXUgdmlydHVh bCBpb21tdT8KPgo+IFlvdXIgY29tbWVudHMgYXJlIHZlcnkgYXBwcmVjaWF0ZWQuIFRoYW5rcyBh IGxvdC4KClRvIGJlIHZpYWJsZSBnb2luZyBmb3J3YXJkcywgYW55IHNvbHV0aW9uIG11c3Qgd29y ayB3aXRoIFBWSC9IVk1MaXRlIGFzCm11Y2ggYXMgSFZNLiAgVGhpcyBhbG9uZSBuZWdhdGVzIHFl bXUgYXMgYSB2aWFibGUgb3B0aW9uLgoKRnJvbSBhIGRlc2lnbiBwb2ludCBvZiB2aWV3LCBoYXZp bmcgWGVuIG5lZWRpbmcgdG8gZGVsZWdhdGUgdG8gcWVtdSB0bwppbmplY3QgYW4gaW50ZXJydXB0 IGludG8gYSBndWVzdCBzZWVtcyBiYWNrd2FyZHMuCgoKQSB3aG9sZSBsb3Qgb2YgdGhpcyB3b3Vs ZCBiZSBlYXNpZXIgdG8gcmVhc29uIGFib3V0IGlmL3doZW4gd2UgZ2V0IGEKYmFzaWMgcm9vdCBw b3J0IGltcGxlbWVudGF0aW9uIGluIFhlbiwgd2hpY2ggaXMgbmVjZXNzYXJ5IGZvciBIVk1MaXRl LAphbmQgd2hpY2ggd2lsbCBtYWtlIHRoZSBpbnRlcmFjdGlvbiB3aXRoIHFlbXUgcmF0aGVyIG1v cmUgY2xlYW4uICBJdCBpcwpwcm9iYWJseSB3b3J0aCBjb29yZGluYXRpbmcgd29yayBpbiB0aGlz IGFyZWEuCgoKQXMgZm9yIHRoZSBpbmRpdmlkdWFsIGlzc3VlIG9mIDI4OHZjcHUgc3VwcG9ydCwg dGhlcmUgYXJlIGFscmVhZHkgaXNzdWVzCndpdGggNjR2Y3B1IGd1ZXN0cyBhdCB0aGUgbW9tZW50 LiAgV2hpbGUgaXQgaXMgY2VydGFpbmx5IGZpbmUgdG8gcmVtb3ZlCnRoZSBoYXJkIGxpbWl0IGF0 IDI1NSB2Y3B1cywgdGhlcmUgaXMgYSBsb3Qgb2Ygb3RoZXIgd29yayByZXF1aXJlZCB0bwpldmVu IGdldCAxMjh2Y3B1IGd1ZXN0cyBzdGFibGUuCgp+QW5kcmV3CgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1k ZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHA6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=