From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Edgar E. Iglesias" Subject: Re: [early RFC] ARM PCI Passthrough design document Date: Wed, 22 Feb 2017 05:03:41 +0100 Message-ID: <20170222040341.GA7695@toto> References: <56a2cd48-f7cf-25ca-2bfe-cabf02d34df3@linaro.org> <8ca91073-09e7-57ca-9063-b47e0aced39d@linaro.org> <20170131165310.GJ14990@toto> <8ed41863-e7de-e0da-b1d3-e41748245cf1@linaro.org> <20170131190643.GK14990@toto> <20170202153357.GA14990@toto> <1ac7c634-b517-4e17-77e5-337439b804b1@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 1cgO9r-000523-I4 for xen-devel@lists.xenproject.org; Wed, 22 Feb 2017 04:04:03 +0000 Content-Disposition: inline In-Reply-To: <1ac7c634-b517-4e17-77e5-337439b804b1@linaro.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Julien Grall Cc: Stefano Stabellini , Wei Chen , Campbell Sean , Andrew Cooper , Jiandi An , Punit Agrawal , alistair.francis@xilinx.com, xen-devel , Roger Pau =?iso-8859-1?Q?Monn=E9?= , "manish.jaggi@caviumnetworks.com" , Shanker Donthineni , Steve Capper List-Id: xen-devel@lists.xenproject.org T24gTW9uLCBGZWIgMTMsIDIwMTcgYXQgMDM6MzU6MTlQTSArMDAwMCwgSnVsaWVuIEdyYWxsIHdy b3RlOgo+IE9uIDAyLzAyLzE3IDE1OjMzLCBFZGdhciBFLiBJZ2xlc2lhcyB3cm90ZToKPiA+T24g V2VkLCBGZWIgMDEsIDIwMTcgYXQgMDc6MDQ6NDNQTSArMDAwMCwgSnVsaWVuIEdyYWxsIHdyb3Rl Ogo+ID4+T24gMzEvMDEvMjAxNyAxOTowNiwgRWRnYXIgRS4gSWdsZXNpYXMgd3JvdGU6Cj4gPj4+ T24gVHVlLCBKYW4gMzEsIDIwMTcgYXQgMDU6MDk6NTNQTSArMDAwMCwgSnVsaWVuIEdyYWxsIHdy b3RlOgo+ID4+VGhhbmsgeW91IGZvciB0aGUgZG9jdW1lbnRhdGlvbi4gSSBhbSB0cnlpbmcgdG8g dW5kZXJzdGFuZCBpZiB3ZSBjb3VsZCBtb3ZlCj4gPj5pbml0aWFsaXphdGlvbiBpbiBYZW4gYXMg c3VnZ2VzdGVkIGJ5IFN0ZWZhbm8uIEkgbG9va2VkIGF0IHRoZSBkcml2ZXIgaW4KPiA+PkxpbnV4 IGFuZCB0aGUgY29kZSBsb29rcyBzaW1wbGUgbm90IG1hbnkgZGVwZW5kZW5jaWVzLiBIb3dldmVy LCBJIHdhcyBub3QKPiA+PmFibGUgdG8gZmluZCB3aGVyZSB0aGUgR2lnYWJpdCBUcmFuc2NlaXZl cnMgYXJlIGNvbmZpZ3VyZWQuIERvIHlvdSBoYXZlIGFueQo+ID4+bGluayB0byB0aGUgY29kZSBm b3IgdGhhdD8KPiA+Cj4gPkhpIEp1bGllbiwKPiAKPiBIaSBFZGdhciwKCkhpIEp1bGllbiwKClNv cnJ5IGZvciB0aGUgbGF0ZSByZXBseS4uCgoKPiAKPiA+Cj4gPkkgc3VzcGVjdCB0aGF0IHRoaXMg c2V0dXAgaGFzIHByZXZpb3VzbHkgYmVlbiBkb25lIGJ5IHRoZSBpbml0aWFsIGJvb3Rsb2FkZXIK PiA+YXV0by1nZW5lcmF0ZWQgZnJvbSBkZXNpZ24gY29uZmlndXJhdGlvbiB0b29scy4KPiA+Cj4g Pk5vdywgdGhpcyBpcyBtb3ZpbmcgaW50byBMaW51eC4KPiAKPiBEbyB5b3Uga25vdyB3aHkgdGhl eSBkZWNpZGUgdG8gbW92ZSB0aGUgY29kZSBpbiBMaW51eD8gV2hhdCB3b3VsZCBiZSB0aGUKPiBw cm9ibGVtIHRvIGxldCB0aGUgYm9vdGxvYWRlciBjb25maWd1cmluZyB0aGUgR1Q/CgoKTm8sIEkn bSBub3Qgc3VyZSB3aHkgdGhpcyBhcHByb2FjaCB3YXMgbm90IHVzZWQuIFRoZSBvbmx5IHRoaW5n IEkgY2FuIHRoaW5rIG9mCmlzIGEgcnVudGltZSBjb25maWd1cmF0aW9uIGFwcHJvYWNoLgoKCj4g Cj4gPlRoZXJlJ3MgYSBzcGVjaWZpYyBkcml2ZXIgdGhhdCBkb2VzIHRoYXQgYnV0IEFGQUlDUywg aXQgaGFzIG5vdCBiZWVuIHVwc3RyZWFtZWQgeWV0Lgo+ID5Zb3UgY2FuIHNlZSBpdCBoZXJlOgo+ ID5odHRwczovL2dpdGh1Yi5jb20vWGlsaW54L2xpbnV4LXhsbngvYmxvYi9tYXN0ZXIvZHJpdmVy cy9waHkvcGh5LXp5bnFtcC5jCj4gPgo+ID5EVFMgbm9kZXMgdGhhdCBuZWVkIGEgUEhZIGNhbiB0 aGVuIGp1c3QgcmVmZXIgdG8gaXQsIGhlcmUncyBhbiBleGFtcGxlIGZyb20gU0FUQToKPiA+JnNh dGEgewo+ID4gICAgICAgIHBoeS1uYW1lcyA9ICJzYXRhLXBoeSI7Cj4gPiAgICAgICAgcGh5cyA9 IDwmbGFuZTMgUEhZX1RZUEVfU0FUQSAxIDMgMTUwMDAwMDAwPjsKPiA+fTsKPiA+Cj4gPkknbGwg c2VlIGlmIEkgY2FuIGZpbmQgd29ya2luZyBleGFtcGxlcyBmb3IgUENJZSBvbiB0aGUgWkNVMTAy LiBUaGVuIEknbGwgc2hhcmUKPiA+RFRTLCBLZXJuZWwgZXRjLgo+IAo+IEkndmUgZm91bmQgYSBk ZXZpY2UgdHJlZSBvbiB0aGUgZ2l0aHViIGZyb20gdGhlIFpDVTEwMjogenlucW1wLXpjdTEwMi5k dHMsCj4gaXQgbG9va3MgbGlrZSB0aGVyZSBpcyBubyB1c2Ugb2YgUEhZIGZvciB0aGUgcGNpZSBz byBmYXIuCj4gCj4gTGV0cyBpbWFnaW5lIGluIHRoZSBmdXR1cmUsIHBjaWUgd2lsbCB1c2UgdGhl IFBIWS4gSWYgd2UgZGVjaWRlIHRvCj4gaW5pdGlhbGl6ZSB0aGUgaG9zdGJyaWRnZSBpbiBYZW4s IHdlIHdvdWxkIGFsc28gaGF2ZSB0byBwdWxsIHRoZSBQSFkgY29kZSBpbgo+IHRoZSBoeXBlcnZp c29yLiBMZWF2aW5nIGFzaWRlIHRoZSBwcm9ibGVtIHRvIHB1bGwgbW9yZSBjb2RlIGluIFhlbiwg dGhpcyBpcwo+IG5vdCBuaWNlIGJlY2F1c2UgdGhlIFBIWSBpcyB1c2VkIGJ5IGRpZmZlcmVudCBj b21wb25lbnRzIChlLmcgU0FUQSwgVVNCKS4gU28KPiBYZW4gYW5kIERPTTAgd291bGQgaGF2ZSB0 byBzaGFyZSB0aGUgUEhZLgo+IAo+IEZvciBYZW4gUE9WLCB0aGUgYmVzdCBzb2x1dGlvbiB3b3Vs ZCBiZSB0aGUgYm9vdGxvYWRlciBpbml0aWFsaXppbmcgdGhlIFBIWQo+IGJlY2F1c2Ugc3RhcnRp bmcgWGVuLiBTbyB3ZSBjYW4ga2VlcCBhbGwgdGhlIGhvc3RicmlkZ2UgKGluaXRpYWxpemF0aW9u ICsKPiBhY2Nlc3MpIGluIFhlbi4KPiAKPiBJZiBpdCBpcyBub3QgcG9zc2libGUsIHRoZW4gSSB3 b3VsZCBwcmVmZXIgdG8gc2VlIHRoZSBob3N0YnJpZGdlCj4gaW5pdGlhbGl6YXRpb24gaW4gRE9N MC4KClllcywgSSBhZ3JlZSB0aGF0IHRoZSBHVCBzZXR1cCBpbiB0aGUgYm9vdGxvYWRlciBpcyB2 ZXJ5IGF0dHJhY3RpdmUuCkkgZG9uJ3QgdGhpbmsgaHRlIHNldHVwIHNlcXVlbmNlIGlzIGNvbXBs aWNhdGVkLCB3ZSBjYW4gcGVyaGFwcyBldmVuIGRvIGl0Cm9uIHRoZSBjb21tYW5kbGluZSBpbiB1 LWJvb3Qgb3IgeHNkYi4gSSdsbCBoYXZlIHRvIGNoZWNrLgoKCj4gCj4gPgo+ID5JZiB5b3UgYXJl IGxvb2tpbmcgZm9yIGEgcGxhdGZvcm0gdG8gZ2V0IHN0YXJ0ZWQsIGFuIG9wdGlvbiBjb3VsZCBi ZSBpZiBJIGdldCB5b3UgYSBidWlsZCBvZgo+ID5vdXIgUUVNVSB0aGF0IGluY2x1ZGVzIG1vZGVs cyBmb3IgdGhlIFBDSWUgY29udHJvbGxlciwgTVNJIGFuZCBTTU1VIGNvbm5lY3Rpb25zLgo+ID5U aGVzZSBtb2RlbHMgYXJlIGZyaWVuZGx5IHdydC4gUEhZIGNvbmZpZ3MgYW5kIGluaXRpYWxpemF0 aW9uIHNlcXVlbmNlcywgaXQgd2lsbAo+ID5hY2NlcHQgcHJldHR5IG11Y2ggYW55IHNlcXVlbmNl IGFuZCBzdGlsbCB3b3JrLiBUaGlzIHdvdWxkIGFsbG93IHlvdSB0byBmb2N1cyBvbgo+ID5hcmNo aXRlY3R1cmFsIGlzc3VlcyByYXRoZXIgdGhhbiBleGFjdCBkZXRhaWxzIG9mIGluaXQgc2VxdWVu Y2VzICh3aGljaCB3ZSBjYW4KPiA+ZGVhbCB3aXRoIGxhdGVyKS4KPiAKPiBGcm9tIG15IHVuZGVy c3RhbmRpbmcgdGhlIHByb2JsZW0gaXMgd2hlcmUgdGhlIGhvc3RicmlkZ2Ugc2hvdWxkIGJlCj4g aW5pdGlhbGl6ZWQuIEluIGFuIGlkZWFsIHdvcmxkLCBJIHRoaW5rIHRoaXMgaXMgdGhlIGdvYWwg b2YgdGhlIGJvb3Rsb2FkZXIuCj4gSWYgaXQgaXMgbm90IHBvc3NpYmxlIHRoZW4gZGVwZW5kaW5n IG9uIHRoZSBjb21wbGV4aXR5LCB0aGUgaW5pdGlhbGl6YXRpb24KPiB3b3VsZCBoYXZlIHRvIGJl IGRvbmUgZWl0aGVyIGluIFhlbiBvciBET00wLgo+IAo+IEkgZ3Vlc3MgdGhpcyBjb3VsZCBiZSBk ZWNpZGVkIG9uIGNhc2UgYnkgY2FzZSBiYXNpcy4gSSB3aWxsIHN1Z2dlc3QKPiBkaWZmZXJlbnQg cG9zc2liaWxpdHkgaW4gdGhlIGRlc2lnbiBkb2N1bWVudC4KPiAKPiBbLi4uXQo+IAo+ID4+Cj4g Pj5Gcm9tIGEgZGVzaWduIHBvaW50IG9mIHZpZXcsIGl0IHdvdWxkIG1ha2UgbW9yZSBzZW5zZSB0 byBoYXZlIHRoZSBNU0kKPiA+PmNvbnRyb2xsZXIgZHJpdmVyIGluIFhlbiBhcyB0aGUgaG9zdGJy aWRnZSBlbXVsYXRpb24gZm9yIGd1ZXN0IHdpbGwgYWxzbwo+ID4+bGl2ZSB0aGVyZS4KPiA+Pgo+ ID4+U28gaWYgd2UgcmVjZWl2ZSBNU0kgaW4gWGVuLCB3ZSBuZWVkIHRvIGZpZ3VyZSBvdXQgYSB3 YXkgZm9yIERPTTAgYW5kIGd1ZXN0Cj4gPj50byByZWNlaXZlIE1TSS4gVGhlIHNhbWUgd2F5IHdv dWxkIGJlIHRoZSBiZXN0LCBhbmQgSSBndWVzcyBub24tUFYgaWYKPiA+PnBvc3NpYmxlLiBJIGtu b3cgeW91IGFyZSBsb29raW5nIHRvIGJvb3QgdW5tb2RpZmllZCBPUyBpbiBhIFZNLiBUaGlzIHdv dWxkCj4gPj5tZWFuIHdlIG5lZWQgdG8gZW11bGF0ZSB0aGUgTVNJIGNvbnRyb2xsZXIgYW5kIHBv dGVudGlhbGx5IHhpbGlueCBQQ0kKPiA+PmNvbnRyb2xsZXIuIEhvdyBtdWNoIGFyZSB5b3Ugd2ls bGluZyB0byBtb2RpZnkgdGhlIE9TPwo+ID4KPiA+VG9kYXksIHdlIGhhdmUgbm90IHlldCBpbXBs ZW1lbnRlZCBQQ0llIGRyaXZlcnMgZm9yIG91ciBiYXJlbWV0YWwgU0RLLiBTbwo+ID50aGluZ3Mg YXJlIHZlcnkgb3BlbiBhbmQgd2UgY291bGQgZGVzaWduIHdpdGggcHJldHR5IG11Y2ggYW55dGhp bmcgaW4gbWluZC4KPiA+Cj4gPlllcywgd2UgY291bGQgcGVyaGFwcyBpbmNsdWRlIGEgdmVyeSBz bWFsbCBtb2RlbCB3aXRoIG1vc3QgcmVnaXN0ZXJzIGR1bW1pZWQuCj4gPkltcGxlbWVudGluZyB0 aGUgTVNJIHJlYWQgRklGTyB3b3VsZCBhbGxvdyB1cyB0bzoKPiA+Cj4gPjEuIEluamVjdCB0aGUg TVNJIGRvb3JiZWxsIFNQSSBpbnRvIGd1ZXN0cy4gVGhlIGd1ZXN0IHdpbGwgdGhlbiBzZWUgdGhl IHNhbWUKPiA+ICAgSVJRIGFzIG9uIHJlYWwgSFcuCj4gPgo+ID4yLiBHdWVzdCByZWFkcyBob3N0 LWNvbnRyb2xsZXIgcmVnaXN0ZXJzIChNU0kgRklGTykgdG8gZ2V0IHRoZSBzaWduYWxlZCBNU0ku Cj4gCj4gVGhlIFhpbGlueCBQQ0llIGhvc3RicmlkZ2UgaXMgbm90IHRoZSBvbmx5IGhvc3Ricmlk Z2UgaGF2aW5nIE1TSSBjb250cm9sbGVyCj4gZW1iZWRkZWQuIFNvIEkgd291bGQgbGlrZSB0byBz ZWUgYSBnZW5lcmljIHNvbHV0aW9uIGlmIHBvc3NpYmxlLiBUaGlzIHdvdWxkCj4gYXZvaWQgdG8g aW5jcmVhc2UgdGhlIGNvZGUgcmVxdWlyZWQgZm9yIGVtdWxhdGlvbiBpbiBYZW4uCj4gCj4gTXkg Y29uY2VybiB3aXRoIGEgRklGTyBpcyBpdCB3aWxsIHJlcXVpcmUgYW4gdXBwZXIgYm91bmQgdG8g YXZvaWQgdXNpbmcgdG8KPiBtdWNoIG1lbW9yeSBpbiBYZW4uIFdoYXQgaWYgdGhlIEZJRk8gaXMg ZnVsbD8gV2lsbCB5b3UgZHJvcCBNU0k/CgpUaGUgRklGTyBJJ20gcmVmZXJpbmcgdG8gaXMgYSBG SUZPIGluIHRoZSBNU0kgY29udHJvbGxlciBpdHNlbGYuCkkgYWdyZWUgdGhhdCB0aGlzIHdvdWxk bid0IGJlIGdlbmVyaWMgdGhvdWdoLi4uLgoKCj4gCj4gPj5SZWdhcmRpbmcgdGhlIE1TSSBkb29y YmVsbCwgSSBoYXZlIHNlZW4gaXQgaXMgY29uZmlndXJlZCBieSB0aGUgc29mdHdhcmUKPiA+PnVz aW5nIGEgcGh5c2ljYWwgYWRkcmVzcyBvZiBhIHBhZ2UgYWxsb2NhdGVkIGluIHRoZSBSQU0uIFdo ZW4gdGhlIFBDSQo+ID4+ZGV2aWNlcyBpcyB3cml0aW5nIGludG8gdGhlIGRvb3JiZWxsIGRvZXMg dGhlIGFjY2VzcyBnbyB0aHJvdWdoIHRoZSBTTU1VPwo+ID4KPiA+VGhhdCdzIGEgZ29vZCBxdWVz dGlvbi4gT24gb3VyIFFFTVUgbW9kZWwgaXQgZG9lcywgYnV0IEknbGwgaGF2ZSB0byBkaWcgYSBs aXR0bGUgdG8gc2VlIGlmIHRoYXQgaXMgdGhlIGNhc2Ugb24gcmVhbCBIVyBhc3dlbGwuCj4gPgo+ ID4+UmVnYXJkbGVzcyB0aGUgYW5zd2VyLCBJIHRoaW5rIHdlIHdvdWxkIG5lZWQgdG8gbWFwIHRo ZSBNU0kgZG9vcmJlbGwgcGFnZSBpbgo+ID4+dGhlIGd1ZXN0LiBNZWFuaW5nIHRoYXQgZXZlbiBp ZiB3ZSB0cmFwIE1TSSBjb25maWd1cmF0aW9uIGFjY2VzcywgYSBndWVzcwo+ID4+Y291bGQgRE1B IGluIHRoZSBwYWdlLiBTbyBpZiBJIGFtIG5vdCBtaXN0YWtlbiwgTVNJIHdvdWxkIGJlIGluc2Vj dXJlIGluCj4gPj50aGlzIGNhc2UgOi8uCj4gPj4KPiA+Pk9yIG1heWJlIHdlIGNvdWxkIGF2b2lk IG1hcHBpbmcgdGhlIGRvb3JiZWxsIGluIHRoZSBndWVzdCBhbmQgbGV0IFhlbgo+ID4+cmVjZWl2 ZSBhbiBTTU1VIGFib3J0LiBXaGVuIHJlY2VpdmluZyB0aGUgU01NVSBhYm9ydCwgWGVuIGNvdWxk IHNhbml0aXplIHRoZQo+ID4+dmFsdWUgYW5kIHdyaXRlIGludG8gdGhlIHJlYWwgTVNJIGRvb3Ji ZWxsLiBOb3Qgc3VyZSBpZiBpdCB3b3VsZCB3b3Jrcwo+ID4+dGhvdWdodC4KPiA+Cj4gPlllYWgs IHRoaXMgaXMgYSBwcm9ibGVtLgo+ID5JJ20gbm90IHN1cmUgaWYgU01NVSBhYm9ydHMgd291bGQg d29yayBiZWNhdXNlIEkgZG9uJ3QgdGhpbmsgd2Uga25vdyB0aGUgdmFsdWUgb2YgdGhlIGRhdGEg d3JpdHRlbiB3aGVuIHdlIHRha2UgdGhlIGFib3J0Lgo+ID5XaXRob3V0IHRoZSBkYXRhLCBJJ20g bm90IHN1cmUgaG93IHdlIHdvdWxkIGRpc3Rpbmd1aXNoIGJldHdlZW4gZGlmZmVyZW50IE1TSSdz IGZyb20gdGhlIHNhbWUgZGV2aWNlLgo+IAo+IFlvdSBhcmUgcmlnaHQsIHlvdSBkb24ndCBnZXQg dGhlIGRhdGEgd3JpdHRlbiBhbmQgdGhlcmVmb3JlIGl0IGlzIG5vdAo+IHBvc3NpYmxlIHRvIGRp c3Rpbmd1aXNoIE1TSXMuIEkgZ290IGNvbmZ1c2VkIHdpdGggdGhlIGRhdGEgYWJvcnQgdHJhcC4K PiAKPiA+Cj4gPkFsc28sIGV2ZW4gaWYgdGhlIE1TSSBkb29yYmVsbCB3b3VsZCBiZSBwcm90ZWN0 ZWQgYnkgdGhlIFNNTVUsIGFsbCBQQ0kgZGV2aWNlcyBhcmUgcHJlc2VudGVkIHdpdGggdGhlIHNh bWUgQVhJIE1hc3RlciBJRC4KPiA+QlRXLCB0aGlzIG1hc3Rlci1JRCBTTU1VIGxpbWl0YXRpb24g aXMgYSBzaG93c3RvcHBlciBmb3IgZG9tVSBndWVzdHMgaXNuJ3QgaXQ/Cj4gCj4gVGhhdCdzIGxp bWl0YXRpb24gaXMgb25seSBmb3IgeW91ciBjdXJyZW50IHZlcnNpb24gb2YgdGhlIGhhcmR3YXJl IGNvcnJlY3Q/CgpZZXMgOi0pCgoKPiAKPiA+T3IgZG8geW91IGhhdmUgaWRlYXMgYXJvdW5kIHRo YXQ/IFBlcmhhcHMgc29tZSBQViB3YXkgdG8gcmVxdWVzdCBtYXBwaW5ncyBmb3IgRE1BPwo+IAo+ IEd1ZXN0IG1lbW9yeSB3b3VsZCBoYXZlIHRvIGJlIGRpcmVjdCBtYXBwZWQgYXMgd2UgZG8gZm9y IERPTTAuIEhvd2V2ZXIsIGl0Cj4gbWVhbnMgdGhlIGd1ZXN0IHNob3VsZCBiZSBhYmxlIHRvIHBh cnNlIHRoZSBmaXJtd2FyZSB0YWJsZSAoRFQsIEFDUEkpIGluCj4gb3JkZXIgdG8ga25vdyB3aGVy ZSB0aGUgUkFNIGJhbmtzIGhhcyBiZWVuIHBvc2l0aW9uZWQuCj4gCj4gQ2hlZXJzLAo+IAo+IC0t Cj4gSnVsaWVuIEdyYWxsCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0 dHBzOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK