From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [early RFC] ARM PCI Passthrough design document Date: Wed, 3 May 2017 13:38:32 +0100 Message-ID: <134c3cdd-ea4e-b8ec-08ae-49cb0f10d503@linaro.org> References: <20170310002934.GA29177@localhost.localdomain> <20170310032318.sfja3vqjg5u3j4ew@MacBook-Pro-de-Roger.local> <20170310152843.GH15705@char.us.oracle.com> <20170315120728.vwnjq4aykfgtq2yv@dhcp-3-128.uk.xensource.com> <20170315124201.GE28643@localhost.localdomain> <20170315125650.h6uozbqbrxpgsech@dhcp-3-128.uk.xensource.com> <20170315151135.GA8164@vbusired-lt> <20170315163839.rd7bh2ho5wun7s67@dhcp-3-128.uk.xensource.com> <20170315165400.GA7956@vbusired-lt> <20170315170050.6lzgzdhnwagep333@dhcp-3-128.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1d5tYG-0007OD-Ka for xen-devel@lists.xenproject.org; Wed, 03 May 2017 12:38:40 +0000 Received: by mail-wr0-f172.google.com with SMTP id l50so105733226wrc.3 for ; Wed, 03 May 2017 05:38:37 -0700 (PDT) In-Reply-To: <20170315170050.6lzgzdhnwagep333@dhcp-3-128.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Roger Pau Monn? , Venu Busireddy Cc: "Edgar Iglesias (edgar.iglesias@xilinx.com)" , Stefano Stabellini , Wei Chen , Steve Capper , Andrew Cooper , Jiandi An , alistair.francis@xilinx.com, Punit Agrawal , Campbell Sean , xen-devel , "manish.jaggi@caviumnetworks.com" , Shanker Donthineni List-Id: xen-devel@lists.xenproject.org SGkgUm9nZXIsCgpTb3JyeSBmb3IgdGhlIGxhdGUgYW5zd2VyLgoKT24gMTUvMDMvMTcgMTc6MDAs IFJvZ2VyIFBhdSBNb25uPyB3cm90ZToKPiBPbiBXZWQsIE1hciAxNSwgMjAxNyBhdCAxMTo1NDow N0FNIC0wNTAwLCBWZW51IEJ1c2lyZWRkeSB3cm90ZToKPj4gT24gV2VkLCBNYXIgMTUsIDIwMTcg YXQgMDQ6Mzg6MzlQTSArMDAwMCwgUm9nZXIgUGF1IE1vbm4/IHdyb3RlOgo+Pj4gT24gV2VkLCBN YXIgMTUsIDIwMTcgYXQgMTA6MTE6MzVBTSAtMDUwMCwgVmVudSBCdXNpcmVkZHkgd3JvdGU6Cj4+ Pj4gT24gV2VkLCBNYXIgMTUsIDIwMTcgYXQgMTI6NTY6NTBQTSArMDAwMCwgUm9nZXIgUGF1IE1v bm4/IHdyb3RlOgo+Pj4+PiBPbiBXZWQsIE1hciAxNSwgMjAxNyBhdCAwODo0MjowNEFNIC0wNDAw LCBLb25yYWQgUnplc3p1dGVrIFdpbGsgd3JvdGU6Cj4+Pj4+PiBPbiBXZWQsIE1hciAxNSwgMjAx NyBhdCAxMjowNzoyOFBNICswMDAwLCBSb2dlciBQYXUgTW9ubj8gd3JvdGU6Cj4+Pj4+Pj4gT24g RnJpLCBNYXIgMTAsIDIwMTcgYXQgMTA6Mjg6NDNBTSAtMDUwMCwgS29ucmFkIFJ6ZXN6dXRlayBX aWxrIHdyb3RlOgo+Pj4+Pj4+PiBPbiBGcmksIE1hciAxMCwgMjAxNyBhdCAxMjoyMzoxOFBNICsw OTAwLCBSb2dlciBQYXUgTW9ubj8gd3JvdGU6Cj4+Pj4+Pj4+PiBPbiBUaHUsIE1hciAwOSwgMjAx NyBhdCAwNzoyOTozNFBNIC0wNTAwLCBLb25yYWQgUnplc3p1dGVrIFdpbGsgd3JvdGU6Cj4+Pj4+ Pj4+Pj4gT24gVGh1LCBNYXIgMDksIDIwMTcgYXQgMDE6MjY6NDVQTSArMDAwMCwgSnVsaWVuIEdy YWxsIHdyb3RlOgo+Pj4+Pj4+Pj4+PiBIaSBLb25yYWQsCj4+Pj4+Pj4+Pj4+Cj4+Pj4+Pj4+Pj4+ IE9uIDA5LzAzLzE3IDExOjE3LCBLb25yYWQgUnplc3p1dGVrIFdpbGsgd3JvdGU6Cj4+Pj4+Pj4+ Pj4+PiBPbiBUaHUsIE1hciAwOSwgMjAxNyBhdCAxMTo1OTo1MUFNICswOTAwLCBSb2dlciBQYXUg TW9ubj8gd3JvdGU6Cj4+Pj4+Pj4+Pj4+Pj4gT24gV2VkLCBNYXIgMDgsIDIwMTcgYXQgMDI6MTI6 MDlQTSAtMDUwMCwgS29ucmFkIFJ6ZXN6dXRlayBXaWxrIHdyb3RlOgo+Pj4+Pj4+Pj4+Pj4+PiBP biBXZWQsIE1hciAwOCwgMjAxNyBhdCAwNzowNjoyM1BNICswMDAwLCBKdWxpZW4gR3JhbGwgd3Jv dGU6Cj4+Pj4+Pj4+Pj4+Pj4+IC4uIHRoaXMgYXMgZm9yIFNSLUlPViBkZXZpY2VzIHlvdSBuZWVk IHRoZSBkcml2ZXJzIHRvIGtpY2sgdGhlIGhhcmR3YXJlCj4+Pj4+Pj4+Pj4+Pj4+IHRvIGdlbmVy YXRlIHRoZSBuZXcgYnVzIGFkZHJlc3Nlcy4gQW5kIHRob3NlIChhbG9uZyB3aXRoIHRoZSBCQVIg cmVnaW9ucykgYXJlCj4+Pj4+Pj4+Pj4+Pj4+IG5vdCB2aXNpYmxlIGluIEFDUEkgKHRoZXkgYXJl IGNvbnN0cnVjdHVlZCBkeW5hbWljYWxseSkuCj4+Pj4+Pj4+Pj4+Pj4KPj4+Pj4+Pj4+Pj4+PiBU aGVyZSdzIGFscmVhZHkgY29kZSBpbiBYZW4gWzBdIHRvIGZpbmQgb3V0IHRoZSBzaXplIG9mIHRo ZSBCQVJzIG9mIFNSLUlPVgo+Pj4+Pj4+Pj4+Pj4+IGRldmljZXMsIGJ1dCBJJ20gbm90IHN1cmUg d2hhdCdzIHRoZSBpbnRlbmRlZCB1c2FnZSBvZiB0aGF0LCBkb2VzIGl0IG5lZWQgdG8KPj4+Pj4+ Pj4+Pj4+PiBoYXBwZW4gX2FmdGVyXyB0aGUgZHJpdmVyIGluIERvbTAgaGFzIGRvbmUgd2hhdGV2 ZXIgbWFnaWMgZm9yIHRoaXMgdG8gd29yaz8KPj4+Pj4+Pj4+Pj4+Cj4+Pj4+Pj4+Pj4+PiBZZXMu IFRoaXMgaXMgY2FsbGVkIHZpYSB0aGUgUEhZU0RFVk9QX3BjaV9kZXZpY2VfYWRkIGh5cGVyY2Fs bCB3aGVuCj4+Pj4+Pj4+Pj4+PiB0aGUgZGV2aWNlIGRyaXZlciBpbiBkb20wIGhhcyBmaW5pc2hl ZCAiY3JlYXRpbmciIHRoZSBWRi4gU2VlIGRyaXZlcnMveGVuL3BjaS5jCj4+Pj4+Pj4+Pj4+Cj4+ Pj4+Pj4+Pj4+IFdlIGFyZSB0aGlua2luZyB0byBub3QgdXNlIFBIWVNERVZPUF9wY2lfZGV2aWNl X2FkZCBoeXBlcmNhbGwgZm9yIEFSTSBhbmQgZG8KPj4+Pj4+Pj4+Pj4gdGhlIFBDSSBzY2Fubmlu ZyBpbiBYZW4uCj4+Pj4+Pj4+Pj4+Cj4+Pj4+Pj4+Pj4+IElmIEkgdW5kZXJzdGFuZCBjb3JyZWN0 bHkgd2hhdCB5b3Ugc2FpZCwgb25seSB0aGUgUENJIGRyaXZlciB3aWxsIGJlIGFibGUgdG8KPj4+ Pj4+Pj4+Pj4ga2ljayBTUi1JT1YgZGV2aWNlIGFuZCBYZW4gd291bGQgbm90IGJlIGFibGUgdG8g ZGV0ZWN0IHRoZSBkZXZpY2UgdW50aWwgaXQKPj4+Pj4+Pj4+Pj4gaGFzIGJlZW4gZnVsbHkgY29u ZmlndXJlZC4gU28gaXQgd291bGQgbWVhbiB0aGF0IHdlIGhhdmUgdG8ga2VlcAo+Pj4+Pj4+Pj4+ PiBQSFlTREVWT1BfcGNpX2RldmljZV9hZGQgYXJvdW5kIHRvIGtub3cgd2hlbiBYZW4gY2FuIHVz ZSB0aGUgZGV2aWNlLgo+Pj4+Pj4+Pj4+Pgo+Pj4+Pj4+Pj4+PiBBbSBJIGNvcnJlY3Q/Cj4+Pj4+ Pj4+Pj4KPj4+Pj4+Pj4+PiBZZXMuIFVubGVzcyB0aGUgUENJIGRyaXZlcnMgY29tZSB1cCB3aXRo IHNvbWUgb3RoZXIgd2F5IHRvIHRlbGwgdGhlCj4+Pj4+Pj4+Pj4gT1MgdGhhdCBvaCwgaGV5LCB0 aGVyZSBpcyB0aGlzIG5ldyBQQ0kgZGV2aWNlIHdpdGggdGhpcyBCREYuCj4+Pj4+Pj4+Pj4KPj4+ Pj4+Pj4+PiBPciB0aGUgdW5kZXJsYXlpbmcgYnVzIG9uIEFSTSBjYW4gc2VuZCBzb21lICduZXcg ZGV2aWNlJyBpbmZvcm1hdGlvbj8KPj4+Pj4+Pj4+Cj4+Pj4+Pj4+PiBIbSwgaXMgdGhpcyBzb21l dGhpbmcgc3RhbmRhcmQgYmV0d2VlbiBhbGwgdGhlIFNSLUlPViBpbXBsZW1lbnRhdGlvbnMsIG9y IGVhY2gKPj4+Pj4+Pj4+IHZlbmRvcnMgaGF2ZSB0aGVpciBvd24gc2F1Y2U/Cj4+Pj4+Pj4+Cj4+ Pj4+Pj4+IEdvc2gsIGFsbCBvZiB0aGVtIGhhdmUgdGhlaXIgb3duIHNhdWNlLiBUaGUgb25seSB0 aGluZyB0aGF0IGlzIHRoZSBzYW1lCj4+Pj4+Pj4+IGlzIHRoYXQgc3VkZGVubHkgYmVoaW5kIHRo ZSBQRiBkZXZpY2UgdGhlcmUgYXJlIFBDSSBkZXZpZXMgdGhhdCBhcmUgcmVzcG9uZGluZwo+Pj4+ Pj4+PiB0byAweGNmYyByZXF1ZXN0cy4gTUFnaWMhCj4+Pj4+Pj4KPj4+Pj4+PiBJJ20gcmVhZGlu ZyB0aGUgUENJIFNSLUlPViAxLjEgc3BlYywgYW5kIEkgdGhpbmsgd2UgZG9uJ3QgbmVlZCB0byB3 YWl0IGZvciB0aGUKPj4+Pj4+PiBkZXZpY2UgZHJpdmVyIGluIERvbTAgaW4gb3JkZXIgdG8gZ2V0 IHRoZSBpbmZvcm1hdGlvbiBvZiB0aGUgVkYgZGV2aWNlcywgd2hhdAo+Pj4+Pj4+IFhlbiBjYXJl cyBhYm91dCBpcyB0aGUgcG9zaXRpb24gb2YgdGhlIEJBUnMgKHNvIHRoYXQgdGhleSBjYW4gYmUg bWFwcGVkIGludG8KPj4+Pj4+PiBEb20wIGF0IGJvb3QpLCBhbmQgdGhlIFBDSSBTQkRGIG9mIGVh Y2ggUEYvVkYsIHNvIHRoYXQgWGVuIGNhbiB0cmFwIGFjY2Vzc2VzIHRvCj4+Pj4+Pj4gaXQuCj4+ Pj4+Pj4KPj4+Pj4+PiBBRkFJQ1QgYm90aCBvZiB0aGlzIGNhbiBiZSBvYnRhaW5lZCB3aXRob3V0 IGFueSBkcml2ZXItc3BlY2lmaWMgY29kZSwgc2luY2UKPj4+Pj4+PiBpdCdzIGFsbCBjb250YWlu ZWQgaW4gdGhlIFBDSSBTUi1JT1Ygc3BlYyAoYnV0IG1heWJlIEknbSBtaXNzaW5nIHNvbWV0aGlu ZykuCj4+Pj4+Pgo+Pj4+Pj4gQ0MtaW5nIFZlbnUsCj4+Pj4+Pgo+Pj4+Pj4gUm9nZXIsIGNvdWxk IHlvdSBwb2ludCBvdXQgd2hpY2ggb2YgdGhlIGNoYXB0ZXJzIGhhcyB0aGlzPwo+Pj4+Pgo+Pj4+ PiBUaGlzIHdvdWxkIGJlIGNoYXB0ZXIgMiAoIkluaXRpYWxpemF0aW9uIGFuZCBSZXNvdXJjZSBB bGxvY2F0aW9uIiksIGFuZCB0aGVuCj4+Pj4+IHRoZXJlJ3MgYSAiSU1QTEVNRU5UQVRJT04gTk9U RSIgdGhhdCBzaG93cyBob3cgdGhlIFBGL1ZGIGFyZSBtYXRjaGVkIHRvCj4+Pj4+IGZ1bmN0aW9u IG51bWJlcnMgaW4gcGFnZSA0NSAoSSBoYXZlIHRoZSBmb2xsb3dpbmcgY29weSwgd2hpY2ggaXMg dGhlIGxhdGVzdAo+Pj4+PiByZXZpc2lvbjogIlNpbmdsZSBSb290IEkvTyBWaXJ0dWFsaXphdGlv biBhbmQgU2hhcmluZyBTcGVjaWZpY2F0aW9uIFJldmlzaW9uCj4+Pj4+IDEuMSIgZnJvbSBKYW51 YXJ5IDIwIDIwMTAgWzBdKS4KPj4+Pj4KPj4+Pj4gVGhlIGRvY3VtZW50IGlzIHF1aXRlIGNvbXBs ZXgsIGJ1dCBpdCBpcyBhIHN0YW5kYXJkIHRoYXQgYWxsIFNSLUlPViBkZXZpY2VzCj4+Pj4+IHNo b3VsZCBmb2xsb3cgc28gQUZBSUNUIFhlbiBzaG91bGQgYmUgYWJsZSB0byBnZXQgYWxsIHRoZSBp bmZvcm1hdGlvbiB0aGF0IGl0Cj4+Pj4+IG5lZWRzIGZyb20gdGhlIFBDSSBjb25maWcgc3BhY2Ug aW4gb3JkZXIgdG8gZGV0ZWN0IHRoZSBQRi9WRiBCQVJzIGFuZCB0aGUgQkRGCj4+Pj4+IGRldmlj ZSBhZGRyZXNzZXMuCj4+Pj4+Cj4+Pj4+IFJvZ2VyLgo+Pj4+Pgo+Pj4+PiBbMF0gaHR0cHM6Ly9t ZW1iZXJzLnBjaXNpZy5jb20vd2cvUENJLVNJRy9kb2N1bWVudC9kb3dubG9hZC84MjM4Cj4+Pj4K Pj4+PiBJIGRvIG5vdCBoYXZlIGFjY2VzcyB0byB0aGlzIGRvY3VtZW50LCBzbyBJIGhhdmUgdG8g cmVseSBvbiBSZXYgMS4wCj4+Pj4gZG9jdW1lbnQsIGJ1dCBJIGRvbid0IHRoaW5rIHRoaXMgYXNw ZWN0IG9mIHRoZSBzcGVjIGNoYW5nZWQgbXVjaC4KPj4+Pgo+Pj4+IEluIGFueSBjYXNlLCBJIGFt IGFmcmFpZCBJIGFtIG5vdCBzZWVpbmcgdGhlIG92ZXJhbGwgcGljdHVyZSwgYnV0IEkKPj4+PiB3 b3VsZCBsaWtlIHRvIGNvbW1lbnQgb24gdGhlIGxhc3QgcGFydCBvZiB0aGlzIGRpc2N1c3Npb24u IEluZGVlZCwgdGhlCj4+Pj4gY29uZmlndXJhdGlvbiBzcGFjZSAoaW5jbHVkaW5nIHRoZSBTUi1J T1YgZXh0ZW5kZWQgY2FwYWJpbGl0eSkgY29udGFpbnMKPj4+PiBhbGwgdGhlIGluZm9ybWF0aW9u LCBidXQgb25seSB0aGUgaW5mb3JtYXRpb24gbmVjZXNzYXJ5IGZvciB0aGUgT1MgdG8KPj4+PiAi ZW51bWVyYXRlIiB0aGUgZGV2aWNlIChQRiBhcyB3ZWxsIGFzIFZGcykuIFRoZSBidXMgYW5kIGRl dmljZSBudW1iZXIKPj4+PiAoU0JERikgYXNzaWdubWVudCwgYW5kIHByb2dyYW1taW5nIG9mIHRo ZSBCQVJzLCBhcmUgYWxsIGRvbmUgZHVyaW5nIHRoYXQKPj4+PiBlbnVtZXJhdGlvbi4gSW4gdGhp cyBkaXNjdXNzaW9uLCB3aGljaCBlbnRpdHkgaXMgZG9pbmcgdGhlIGVudW1lcmF0aW9uPwo+Pj4+ IFhlbiwgb3IgRG9tMD8KPj4+Cj4+PiBYZW4gbmVlZHMgdG8gbGV0IERvbTAgbWFuYWdlIHRoZSBk ZXZpY2UsIGJ1dCBhdCB0aGUgc2FtZSB0aW1lIGl0IG5lZWRzIHRvCj4+PiBjb3JyZWN0bHkgbWFw IHRoZSBkZXZpY2UgQkFScyBpbnRvIERvbTAgcGh5c21hcC4gSSB0aGluayB0aGUgZWFzaWVzdCBz b2x1dGlvbgo+Pj4gaXMgdG8gbGV0IERvbTAgbWFuYWdlIHRoZSBkZXZpY2UsIGFuZCBYZW4gc2hv dWxkIHNldHVwIGEgdHJhcCB0byBkZXRlY3QgRG9tMAo+Pj4gc2V0dGluZyB0aGUgVkYgRW5hYmxl IGJpdCAoYml0IDAgaW4gU1ItSU9WIENvbnRyb2wgKDA4aCkpLCBhdCB3aGljaCBwb2ludCBYZW4K Pj4+IHdpbGwgc2l6ZSB0aGUgVkYgQkFScyAoYW5kIG1hcCB0aGVtIGludG8gRG9tMCkgYW5kIGFs c28gZW51bWVyYXRlIHRoZSBWRgo+Pj4gZGV2aWNlcy4KPj4KPj4gVGhlcmUgd2FzIGEgc2Vjb25k IHBhcnQgaW4gbXkgZWFybGllciBlbWFpbC4gQ29waWVkIGJlbG93Ogo+Pgo+PiAiSWYgWGVuIHdh aXRzIHVudGlsIERvbTAgZW51bWVyYXRlZCB0aGUgZGV2aWNlLCB0aGVuIHRoZSBCQVIgcG9zaXRp b25zCj4+IGFyZSBhbHJlYWR5IHdpdGhpbiB0aGUgRG9tMCdzIG1lbW9yeSBzcGFjZSEgTm8gZnVy dGhlciBtYXBwaW5nIGlzIG5lZWRlZCwKPj4gcmlnaHQ/Igo+Pgo+PiBBcyBJIGFza2VkLCBpZiBE b20wIGVudW1lcmF0ZXMgdGhlIGRldmljZSBhbmQgcHJvZ3JhbXMgdGhlIEJBUnMsIHRoZSBCQVIK Pj4gcmVnaW9ucyBhcmUgYWxyZWFkeSBpbiBEb20wJ3MgcGh5c2ljYWwgbWVtb3J5ISBXaGF0IGZ1 cnRoZXIgbWFwcGluZyBpcwo+PiBuZWVkZWQ/IFdoYXQgYW0gSSBtaXNzaW5nPwo+Cj4gTm8sIHRo YXQncyBub3QgdHJ1ZS4gWGVuIGlzIHRoZSBvbmUgdGhhdCBwZXJmb3JtcyB0aGUgbWFwcGluZyBp bnRvIERvbTAgcGh5c21hcAo+IG9uIFBWSCAoYW5kIEFSTSksIHNvIHVubGVzcyBYZW4gaGFzIG1h cHBlZCB0aG9zZSBCQVJzIGludG8gRG9tMCwgRG9tMCBkb2Vzbid0Cj4gaGF2ZSBhY2Nlc3MgdG8g dGhlIEJBUnMgYXQgYWxsLiBIZW5jZSBJIHRoaW5rIFhlbiBzaG91bGQgZGV0ZWN0IERvbTAgc2V0 dGluZwo+IHRoZSBWRiBFbmFibGUgYml0LCBwcm9wZXJseSBzaXplIHRoZSBWRiBCQVJzIGFuZCBt YXAgdGhlbSBpbnRvIERvbTAuCgpUaGlzIGlzIG5vdCBhY2N1cmF0ZSBmb3IgQVJNLiBJbiB0aGUg Y2FzZSBvZiBEZXZpY2UgVHJlZSwgdGhlIFBDSSBtZW1vcnkgCnNwYWNlIGlzIG1hcHBlZCB0byBE T00wIHdoZW4gYnVpbGRpbmcgaXQsIGZvciB0aGUgQUNQSSB0aG9zZSByZWdpb25zIAp3aWxsIGJl IG1hcHBlZCBvbiBmYXVsdC4KClNvIFZlbnUgaXMgcmlnaHQgZm9yIEFSTSwgYWxsIHRoZSBCQVIg cmVnaW9ucyBhcmUgYWxyZWFkeSBtYXBwZWQgaW50byAKRE9NMCdzIHBoeXNpY2FsIG1lbW9yeS4K CkNoZWVycywKCi0tIApKdWxpZW4gR3JhbGwKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3Rz Lnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=