From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [early RFC] ARM PCI Passthrough design document Date: Thu, 29 Dec 2016 19:38:26 +0000 Message-ID: <35d99ebb-13d6-4835-7c67-ea293e589922@linaro.org> References: <5cf9128e-e845-2a89-f7c7-ac8616941ab9@linaro.org> 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 1cMgX1-0001vM-LG for xen-devel@lists.xenproject.org; Thu, 29 Dec 2016 19:38:31 +0000 Received: by mail-wj0-f181.google.com with SMTP id sd9so179732451wjb.1 for ; Thu, 29 Dec 2016 11:38:28 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: "Jaggi, Manish" , xen-devel , Stefano Stabellini Cc: "Edgar Iglesias (edgar.iglesias@xilinx.com)" , "Kapoor, Prasun" , "Nair, Jayachandran" , Wei Chen , Campbell Sean , Jiandi An , Punit Agrawal , "alistair.francis@xilinx.com" , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , Shanker Donthineni , Steve Capper List-Id: xen-devel@lists.xenproject.org CgpPbiAyOS8xMi8yMDE2IDE4OjQxLCBKYWdnaSwgTWFuaXNoIHdyb3RlOgo+IEhpIEp1bGllbiwK ClBsZWFzZSBjb25maWd1cmUgeW91IGUtbWFpbCBjbGllbnQgdG8gcHJvcGVybHkgcXVvdGUgYSBl LW1haWwuIFRoZSAKW21hbmlzaF0gc29sdXRpb24gaXMgaGFyZCB0byByZWFkLgoKPiAtLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0KPiAqRnJvbToqIEp1bGllbiBHcmFsbCA8anVsaWVuLmdyYWxsQGxpbmFyby5vcmc+ Cj4gKlNlbnQ6KiBUaHVyc2RheSwgRGVjZW1iZXIgMjksIDIwMTYgMTA6MzMgUE0KPiAqVG86KiBK YWdnaSwgTWFuaXNoOyB4ZW4tZGV2ZWw7IFN0ZWZhbm8gU3RhYmVsbGluaQo+ICpDYzoqIEVkZ2Fy IElnbGVzaWFzIChlZGdhci5pZ2xlc2lhc0B4aWxpbnguY29tKTsgU3RldmUgQ2FwcGVyOyBQdW5p dAo+IEFncmF3YWw7IFdlaSBDaGVuOyBDYW1wYmVsbCBTZWFuOyBTaGFua2VyIERvbnRoaW5lbmk7 IEppYW5kaSBBbjsgUm9nZXIKPiBQYXUgTW9ubsOpOyBhbGlzdGFpci5mcmFuY2lzQHhpbGlueC5j b207IEthcG9vciwgUHJhc3VuOyBOYWlyLCBKYXlhY2hhbmRyYW4KPiAqU3ViamVjdDoqIFJlOiBb ZWFybHkgUkZDXSBBUk0gUENJIFBhc3N0aHJvdWdoIGRlc2lnbiBkb2N1bWVudAo+Cj4KPgo+IE9u IDI5LzEyLzIwMTYgMTQ6MTYsIEphZ2dpLCBNYW5pc2ggd3JvdGU6Cj4+IEhpIEp1bGllbiwKPgo+ IEhlbGxvIE1hbmlzaCwKPgo+Pgo+PiBXb3VsZG50IGl0IGJlIGJldHRlciBpZiB0aGUgZGVzaWdu IHByb3Bvc2VkIGJ5IGNhdml1bSBiZSBleHRlbmRlZCBieQo+PiBkaXNjdXNzaW9ucyBhbmQgY29t ZXVwIHdpdGggYW4gYWdyZWVhYmxlIHRvIGFsbCBkZXNpZ24uCj4KPiBBcyBJIG1lbnRpb25lZCBp biBteSBtYWlsLCB0aGlzIGRlc2lnbiBpcyBhIGNvbXBsZXRlbHkgZGlmZmVyZW50Cj4gYXBwcm9h Y2ggKGVtdWxhdGlvbiB2cyBQVikuCj4gW21hbmlzaF0gSXQgd291bGQgaGF2ZSBiZWVuIGJldHRl ciBpZiB5b3UgaGFkIHN1Z2dlc3RlZCBpbiB0aGUgZGVzaWduCj4gcG9zdGVkIGJ5IG1lLCB0aGF0 IHRoZSBmb2xsb3dpbmcgMS4yLjMgcG9pbnRzIHdvdWxkIGNoYW5nZS4KPiBTaW5jZSBhIGRlc2ln biBpcyBhbHJlYWR5IGJlZW4gcG9zdGVkLCBpdCBtYWtlcyBzZW5zZSB0byBmb2N1cyBvbiB0aGF0 Cj4gYW5kIHJlYWNoIGEgY29tbW9uIHVuZGVyc3RhbmRpbmcuIEFuZCBpcyBhIGJpdCBfcnVkZV8u CgpCZWZvcmUgc2F5aW5nIGl0IGlzIHJ1ZGUsIGJld2FyZSB0aGVyZSB3YXMgYSBnYXAgb2YgbW9y ZSB0aGFuIGEgeWVhciAKYmV0d2VlbiB2NCBhbmQgdjUuIEkgYWxzbyB3YXJuZWQgeW91IG9uIElS QyB0aGF0IEkgd2FzIHdvcmtpbmcgb24gYSBuZXcgCmRlc2lnbiBkb2N1bWVudCB0aGUgbGFzdCBj b3VwbGUgb2YgbW9udGhzLiBTbyBwbGVhc2UgZG9uJ3QgZG8gdGhlIHBlcnNvbiAKdGhhdCB3YXMg bm90IGF3YXJlLgoKPgo+IFRoaXMgaXMgYSBkaXN0aW5jdCBwcm9wb3NhbCBiZWNhdXNlCj4gZW11 bGF0aW9uIHZzIFBWIGltcGFjdCBhIGxvdCB0aGUgb3ZlcmFsbCBkZXNpZ24uCj4KPiBbbWFuaXNo XSBUaGVyZSBhcmUgMyBhc3BlY3RzCj4gYS4gY2hhbmdlcyBuZWVkZWQgaW4gWGVuIC8gRG9tMCBm b3IKPiAtIHJlZ2lzdGVyaW5nIG9mIHBjaSBob3N0IGNvbnRyb2xsZXIgZHJpdmVyIGluIHhlbgo+ IC0gbWFwcGluZyBiZXR3ZWVuIHNkYmYgYW5kIHN0cmVhbWlkCj4gLSBhZGRpbmcgZW51bWVyYXRl ZCBwY2kgZGV2aWNlcyB0byB4ZW4gZG9tMAo+IC0gbWFraW5nIGRldmljZXMgdXNlIFNNTVUgaW4g ZG9tMAo+Cj4gYi4xIEhvdyBkb21VIGlzIGFzc2lnbmVkICBhIFBDSSBkZXZpY2UuCj4gYi4yIEhv dyBhIGRvbVUgUENJIGRyaXZlciByZWFkcyBjb25maWd1cmF0aW9uIHNwYWNlCj4gSSB0aGluayBv bmx5IGF0IHRoaXMgcG9pbnQgUFYgdnMgZW11bGF0aW9uIG1hdHRlcnMuIEFzIG9mIG5vdyB0aGUK PiBmcm9udGVuZCBiYWNrZW5kIGRyaXZlciBhbGxvdyByZWFkaW5nIFBDSSBzcGFjZS4KPiBBZGRp bmcgYW4gaXRzIG5vZGUgaW4gZG9tVSBkZXZpY2UgdHJlZSB3aWxsIG1ha2UgdHJhcHMgdG8geGVu IGZvciBJVFMKPiBlbXVsYXRpb24uCj4KPiBjLiBEVCB2cyBBQ1BJCj4gSSBoYXZlbnQgc2VlbiBp biB5b3VyIGRlc2lnbiBob3cgaXQgaXMgY2FwdHVyZWQgdG8gc3VwcG9ydCBib3RoIGR0IGFuZAo+ IGFjcGkgdG9nZXRoZXIuCj4gQSBnb29kIGFwcHJhb2NoIHdvdWxkIGJlIHRvIGV4dGVuZCBEcmFm dDUgd2l0aCBBQ1BJLgoKUGxlYXNlIHJlYWQgYWdhaW4gc2VjdGlvbiAiSW5mb3JtYXRpb24gYXZh aWxhYmxlIGluIHRoZSBmaXJtd2FyZSB0YWJsZXMiLgoKPgo+PiBJIGRpZG50IHNlZSBhbnkgY29t bWVudHMgb24gdGhlIG9uZSBJIHBvc3RlZC4KPgo+IFdoaWxzdCBJIGhhdmVuJ3QgY29tbWVudGVk IG9uIHlvdXIgZGVzaWduIGRvY3VtZW50LCBJIGhhdmUgcmVhZAo+IGNhcmVmdWxseSB5b3VyIGxh c3QgdmVyc2lvbiBvZiB0aGUgZGVzaWduLiBCdXQgZXZlbiBhZnRlciA1IHZlcnNpb24gYW5kCj4g bmVhcmx5IDIgeWVhcnMgb2Ygd29yayB0aGlzIGlzIHN0aWxsIERUIGFuZCBJVFMgZm9jdXNlZC4K PiBbbWFuaXNoXSBUd28gcmVhc29ucyBmb3IgIHRoYXQKPiBhKSBQQ0kgZHJpdmVyIGluIGxpbnV4 IHdhcyBldm9sdmluZyBhbmQgb25seSBhZnRlciBtc2ktbWFwIHdlIGhhdmUgYSB3YXkKPiB0byBt YXAgc2JkZiB3aXRoIHN0ZWFtSUQKCllvdSBhcmUgd3JvbmcgaGVyZS4gbXNpLW1hcCBpcyBvbmx5 IGhlcmUgdG8gZG8gdGhlIG1hcHBpbmcgYmV0d2VlbiBSSUQgCmFuZCBEZXZpY2VJRC4gTm90IGJl dHdlZW4gUklEIGFuZCBTdHJlYW1JRC4gUGxlYXNlIHJlYWQgYWdhaW4gdGhlIApkb2N1bWVudGF0 aW9uIChEb2N1bWVudGF0aW9uL2RldmljZXRyZWUvYmluZGluZ3MvcGNpL3BjaS1tc2kudHh0KS4g Rm9yIApSSUQgdG8gU3RyZWFtSUQgeW91IHdhbnQgdG8gbG9vayBhdCB0aGUgcHJvcGVydHkgaW9t bXUtbWFwIAooRG9jdW1lbnRhdGlvbi9kZXZpY2V0cmVlL2JpbmRpbmdzL3BjaS9wY2ktaW9tbXUu dHh0KS4KClsuLi5dCj4KPiBObyB3b3JkcyBhYm91dAo+IGludGVycnVwdCBsZWdhY3ksCj4gW01h bmlzaF0gQXQgdGhlIHRpbWUgb2YgWGVuIGRldiBzdW1taXQgMjAxNSB3ZSBhZ3JlZWQgdG8ga2Vl cCBsZWdhY3kgYXMKPiBhIHNlY29uZGFyeSBpdGVtLCBzbyB0aGF0IHdlIGNhbiBnZXQgc29tZXRo aW5nIGluIHhlbiBmb3IgUENJIHB0LgoKRXZlbiBpZiB3ZSBkb24ndCBpbXBsZW1lbnQgaXQgcmln aHQgbm93LCB3ZSBuZWVkIHRvIGhhdmUgYSB0aGluayBhYm91dCAKaXQgYXMgdGhpcyBtYXkgbW9k aWZ5IHRoZSBvdmVyYWxsIGRlc2lnbi4gV2hhdCBJIHdhbnQgdG8gYXZvaWQgaXMgaGF2ZSAKdG8g cmVkbyBldmVyeXRoaW5nIGluIHRoZSBmdXR1cmUganVzdCBiZWNhdXNlIHdlIGtub3dpbmdseSBp Z25vcmVkIGEgYml0LgoKPiBubyB3b3JkcyBhYm91dCBBQ1BJLi4uIEFuZCBhcyB5b3UgY2FuIHNl ZSBpbiB0aGlzCj4gZHJhZnQsIEFDUEkgd2lsbCBoYXZlIGFuIGltcGFjdCBvbiB0aGUgb3ZlcmFs bC4KPgo+IFNvbWUgcGFydCBvZiB0aGlzIGRlc2lnbiBkb2N1bWVudCBpcyBiYXNlZCBvbiBhbGwg dGhlIGRpc2N1c3Npb24gd2UgaGFkCj4gb3ZlciBsYXN0IHllYXIgb24geW91ciBkZXNpZ24uIEhv d2V2ZXIsIG1vc3Qgb2YgdGhlIGNvbW1lbnRzIGhhdmUgbm90Cj4gYmVlbiBhZGRyZXNzZWQgZGVz cGl0ZSB0aGUgZmFjdCB0aGV5IGhhdmUgYmVlbiByZXBlYXRlZCBtdWx0aXBsZSB0aW1lIGJ5Cj4g dmFyaW91cyByZXZpZXdlcnMuIEZvciBleGFtcGxlIHRoZSBidXMgbnVtYmVyIGhhcyBub3QgYmVl biBhZGRlZAo+IFBIWVNERVZPUF9wY2lfaG9zdF9icmlkZ2VfYWRkIGFzIHJlcXVlc3RlZCBpbiBv bmUgb2YgdGhlIGZpcnN0IHZlcnNpb24KPiBvZiB0aGUgZGVzaWduLgo+IFttYW5pc2hdIEkgZGlz YWdyZWUsIHNpbmNlIHRoZSBzYW1lIHBjaSBub2RlIGlzIHBhc3NlZCB0byBkb20wIGFuZCB4ZW4K PiBhbmQgaXQgaGFzIGEgYnVzLW5yIHByb3BlcnR5Cj4gdGhlcmUgaXMgbm8gbmVlZCBmb3IgaXQu CgpJdCBpcyBhIGJpdCBhbm5veWluZyB0byBoYXZlIHRvIHJlcGVhdCB0aGlzLCBQQ0kgcGFzc3Ro cm91Z2ggaXMgbm90IG9ubHkgCmZvciB0aGUgRFQvSVRTIHVzZSBjYXNlIGJ1dCBhbHNvIEFDUEks IEdJQ3YybS4uLiBUaGlzIGh5cGVyY2FsbCB3aWxsIGJlIApwYXJ0IG9mIHRoZSBzdGFibGUgQUJJ LiBPbmNlIGl0IGlzIGRlZmluZWQsIGl0IGNhbiBuZXZlciBjaGFuZ2UuIFNvIHdlIApoYXZlIHRv IG1ha2UgaXQgY29ycmVjdCBmcm9tIHRoZSBiZWdpbm5pbmcuCgpJZiB5b3Ugc3RpbGwgZGlzYWdy ZWUsIHBsZWFzZSBleHBsYWluIHdoeS4gSWdub3JpbmcgYSByZXF1ZXN0IGlzIG5vdCB0aGUgCnJp Z2h0IHRoaW5nIHRvIGRvIGlmIHlvdSB3YW50IHRvIHNlZSBwZW9wbGUgcmV2aWV3aW5nIHlvdXIg ZGVzaWduIGRvY3VtZW50LgoKPiBNb3Jlb3ZlciB0aGlzIGh5cGVyY2FsbCB3YXMgc3VnZ2VzdGVk IGJ5IElhbiBhbmQgdGhlIHJlcXVpcmVtZW50IHdhcyB0bwo+IG9ubHkgYWRkIHNlZ25vIHNvIHRo YXQgeGVuIGFuZCBkb20wIGJpbmQgdG8gYSBQQ0kgUkMuCj4KPj4gUHV0dGluZyBhbiBhbHRvZ2V0 aGVyIG5ldyBkZXNpZ24gd2l0aG91dCBjb21tZW50aW5nIG9uIHRoZSBvbmUgcG9zdGVkIGEKPj4g bW9udGggYmFjaywgbWlnaHQgbm90IGJlIGEgcmlnaHQgYXBwcm9hY2gKPgo+IFNwZWFraW5nIGZv ciBteXNlbGYsIG15IGJhbmR3aWR0aCBpcyBsaW1pdGVkIGFuZCBJIGFtIGdvaW5nIHRvCj4gcHJp b3JpdGl6ZSByZXZpZXcgb24gc2VyaWVzIHdoZXJlIG15IGNvbW1lbnRzIGhhdmUgYmVlbiBhZGRy ZXNzZWQuCj4KPiBbbWFuaXNoXSBBbGwgaGF2ZSBsaW1pdGVkIGJhbmR3aWR0aCBhbmQgcHJpb3Jp dGllcyBhcmUgbG9hZGVkLiAgWW91cgo+IGNvbW1lbnRzIGFyZSBkdWxseSB0YWtlbiBjYXJlIG9m IGluIHRoZSBkb2N1bWVudCwgZXNwY2lhbGx5Cj4gc2JkZi1zdHJlYW1JRCBtYXBwaW5nLgoKTm8g aXQgaXMgbm90LiBZb3UgYXJlIHN0aWxsIG1peGluZyBEZXZpY2VJRCBhbmQgU3RyZWFtSUQuIFlv dSBhZGRlZCBhbiAKaHlwZXJjYWxsIHdpdGhvdXQgYW55IGp1c3RpZmljYXRpb24gYW5kIHdheSB0 byB1c2UgaXQuIEkga25vdyB3ZSAKZGlzY3Vzc2VkIGFib3V0IHRoaXMgb24gdjQgYW5kIEkgd2Fz IGNvbmNlcm5lZCBhYm91dCBxdWlyayBmb3IgcGxhdGZvcm0gCndpdGggYSB3cm9uZyBSSUQuIEkg d2FzIGV4cGVjdGluZyBmcm9tIHlvdSB0byBjaGVjayBpZiBteSBjb25jZXJuIHdhcyAKdmFsaWQg YW5kIGNvbWUgdXAgd2l0aCBhIGp1c3RpZmljYXRpb24uCgpBbnl3YXksIHlvdSBhcmUgZm9jdXNp bmcgb24gb25lIGNvbW1lbnQsIGFuZCBub3QgbG9va2luZyBhdCB0aGUgcmVzdCBvZiAKdGhlbS4K Cj4gSSB3b3VsZCBoYXZlIGFwcHJlY2lhdGVkIHRoYXQgeW91IGNvdWxkIGhhdmUgc2VudCBhIGRy YWZ0IDYgd2l0aCB5b3VyCj4gYWRkaXRpb25zIHNvIHRoYXQgYSBnb29kIGRlc2lnbiBiZSBwcm9k dWNlZC4KCkkgYWxyZWFkeSBleHBsYWluZWQgd2h5IEkgaGF2ZSBzZW50IGEgc2VwYXJhdGUgZGVz aWduIGRvY3VtZW50LiBJIGhhdmUgCmJlZW4gd3JpdGluZyB0aGlzIGRlc2lnbiBkb2N1bWVudCBi ZWZvcmUgeW91IHNlbnQgdGhlIHY1LgoKSSBmaXJzdCB0aG91Z2h0IGFib3V0IHJlLXVzaW5nIHlv dXIgZGVzaWduIGRvYyBhcyBhIHNrZWxldG9uLiBCdXQgaXQgd2FzIApub3QgZml0dGluZyB0aGUg d2F5IEkgd2FudGVkIHRvIGRlc2NyaWJlIHRoZSBhcHByb2FjaC4gQ3VycmVudGx5LCBJIApkb24n dCBjYXJlIGFib3V0IHRoZSBpbXBsZW1lbnRhdGlvbiBkZXRhaWxzLiBUaGUgaW1wb3J0YW50IGJp dHMgaXMgdGhlIApoaWdoIGxldmVsIGFyY2hpdGVjdHVyZSBhbmQgdGhlIGp1c3RpZmljYXRpb25z LgoKQ2hlZXJzLAoKLS0gCkp1bGllbiBHcmFsbAoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlz dHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==