From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Dunlap Subject: Re: [PATCH] hvm/altp2m: Clarify the proper way to extend the altp2m interface Date: Tue, 10 Jul 2018 11:46:06 +0100 Message-ID: <45d72623-d63f-ddd1-db5c-e241013ec03a@citrix.com> References: <20180710093322.10854-1-george.dunlap@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1fcq9s-0002de-7c for xen-devel@lists.xenproject.org; Tue, 10 Jul 2018 10:46:12 +0000 In-Reply-To: <20180710093322.10854-1-george.dunlap@citrix.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: xen-devel@lists.xenproject.org Cc: Lars Kurth , Stefano Stabellini , Wei Liu , Razvan Cojocaru , Andrew Cooper , Adrian Pop , Tim Deegan , Julien Grall , Jan Beulich , Tamas K Lengyel , Ian Jackson List-Id: xen-devel@lists.xenproject.org Rm9yZ290IHRvIENDIEJpdERlZmVuZGVyCgpPbiAwNy8xMC8yMDE4IDEwOjMzIEFNLCBHZW9yZ2Ug RHVubGFwIHdyb3RlOgo+IFRoZSBhbHRwMm0gZnVuY3Rpb25hbGl0eSB3YXMgb3JpZ2luYWxseSBl bnZpc2lvbmVkIHRvIGJlIHVzZWQgaW4KPiBzZXZlcmFsIGRpZmZlcmVudCBjb25maWd1cmF0aW9u cywgb25lIG9mIHdoaWNoIHdhcyBhIHNpbmdsZSBpbi1ndWVzdAo+IGFnZW50IHRoYXQgaGFkIGZ1 bGwgb3BlcmF0aW9uYWwgY29udHJvbCBvZiBhbHRwMm0uICBUaGlzIHJlcXVpcmVkIHRoZQo+IHNp bmdsZSBoeXBlcmNhbGwgdG8gYmUgYW4gSFZNT1AsIHdoaWNoIGlzIHRoZSBvbmx5IHR5cGUgb2Yg aHlwZXJjYWxsCj4gYW4gSFZNIGd1ZXN0IGlzIGFsbG93ZWQgdG8gbWFrZS4KPiAKPiBFeHBvc2lu ZyB0aGUgYWx0cDJtIGZ1bmN0aW9uYWxpdHkgdG8gdGhlIGd1ZXN0IHdhcyBjb250cm92ZXJzaWFs IGF0Cj4gdGhlIHRpbWUsIGJ1dCB3YXMgdWx0aW1hdGVseSBhY2NlcHRlZC4gIFRoZSBmYWN0IHRo YXQgYWx0cDJtIGlzIGFuCj4gSFZNT1AgcmF0aGVyIHRoYW4gYSBET01DVEwgaGFzIGNhdXNlZCBz b21lIHByb2JsZW1zLCBob3dldmVyLCBmb3IKPiB0aG9zZSBtb3ZpbmcgZm9yd2FyZCB0cnlpbmcg dG8gZXh0ZW5kIHRoZSBpbnRlcmZhY2U6IEV4dGVuZGluZyB0aGUKPiBpbnRlcmZhY2UgZXZlbiBm b3IgdGhlICdleHRlcm5hbCcgdXNlIGNhc2Ugbm93IG1lYW5zIGV4dGVuZGluZyBhbgo+IEhWTU9Q LCB3aGljaCBpbXBsaWNpdGx5IGV4dGVuZHMgdGhlIHN1cmZhY2Ugb2YgYXR0YWNrIGZvciB0aGUK PiAnaW50ZXJuYWwnIHVzZSBjYXNlIGFzIHdlbGwuICBUaGUgcmVzdWx0IGhhcyBiZWVuIHRoYXQg ZXZlcnkgYWRkaXRpb24KPiB0byB0aGlzIGludGVyZmFjZSBoYXMgYWxzbyBiZWVuIGNvbnRyb3Zl cnNpYWwuCj4gCj4gU2V0dGxlIHRoZSBjb250cm92ZXJzeSBvbmNlIGFuZCBmb3IgYWxsIGJ5IGRv Y3VtZW50aW5nIDEpIHRoZSBwdXJwb3NlCj4gb2YgdGhlIGFsdHAybSBpbnRlcmZhY2UsIGFuZCAy KSBob3cgdG8gZXh0ZW5kIGl0LiAgSW4gcGFydGljdWxhcjoKPiAKPiAqIFNwZWNpZnkgdGhhdCB0 aGUgZnVsbHkgaW4tZ3Vlc3QgYWdlbnQgaXMgYSB0YXJnZXQgdXNlIGNhc2UKPiAKPiAqIFNwZWNp ZnkgdGhhdCBhbGwgZXh0ZW5zaW9ucyB0byBhbHRwMm0gZnVuY3Rpb25hbGl0eSBzaG91bGQgYmUg c3Vib3BzCj4gICBvZiB0aGUgSFZNT1AgaHlwZXJjYWxsCj4gCj4gKiBTcGVjaWZ5IHRoYXQgbmV3 IHN1Ym9wcyBzaG91bGQgYmUgZGlzYWJsZWQgaW4gQUxUUDJNX21peGVkIG1vZGUgYnkKPiAgIGRl ZmF1bHQsIHVubGVzcyBzcGVjaWZpY2FsbHkgZXZhbHVhdGVkIGFzIGJlaW5nIHVzZWZ1bCBmb3Ig dGhlCj4gICAnaW50ZXJuYWwnIHVzZSBjYXNlLgo+IAo+IEhvcGVmdWxseSB0aGlzIHdpbGwgYWxs b3cgdGhlIGFsdHAybSBpbnRlcmZhY2UgdG8gYmUgZGV2ZWxvcGVkIGZ1cnRoZXIKPiB3aXRob3V0 IHVubmVjZXNzYXJ5IGNvbnRyb3ZlcnN5Lgo+IAo+IFNpZ25lZC1vZmYtYnk6IEdlb3JnZSBEdW5s YXAgPGdlb3JnZS5kdW5sYXBAY2l0cml4LmNvbT4KPiAtLS0KPiBDQzogSWFuIEphY2tzb24gPGlh bi5qYWNrc29uQGNpdHJpeC5jb20+Cj4gQ0M6IFdlaSBMaXUgPHdlaS5saXUyQGNpdHJpeC5jb20+ Cj4gQ0M6IEFuZHJldyBDb29wZXIgPGFuZHJldy5jb29wZXIzQGNpdHJpeC5jb20+Cj4gQ0M6IEph biBCZXVsaWNoIDxqYmV1bGljaEBzdXNlLmNvbT4KPiBDQzogVGltIERlZWdhbiA8dGltQHhlbi5v cmc+Cj4gQ0M6IEtvbnJhZCBXaWxrIDxrb25yYWQud2lsa0BvcmFjbGUuY29tPgo+IENDOiBTdGVm YW5vIFN0YWJlbGxpbmkgPHNzdGFiZWxsaW5pQGtlcm5lbC5vcmc+Cj4gQ0M6IEp1bGllbiBHcmFs bCA8anVsaWVuLmdyYWxsQGFybS5jb20+Cj4gQ0M6IFRhbWFzIEsgTGVuZ3llbCA8dGFtYXMubGVu Z3llbEB6ZW50aWZpYy5jb20+Cj4gQ0M6IExhcnMgS3VydGggPGxhcnMua3VydGhAY2l0cml4LmNv bT4KPiAKPiBBcyBmYXIgYXMgSSBjYW4gdGVsbCB0aGVyZSBhcmUgdGhyZWUgcG9zc2libGUgc29s dXRpb25zIHRvIHRoaXMKPiBjb250cm92ZXJzeToKPiAKPiBBLiBSZW1vdmUgdGhlICdpbnRlcm5h bCcgZnVuY3Rpb25hbGl0eSBhcyBhIHRhcmdldCBieSBjb252ZXJ0aW5nIHRoZQo+IGN1cnJlbnQg SFZNT1AgaW50byBhIERPTUNUTC4KPiAKPiBCLiBIYXZlIHR3byBoeXBlcmNhbGxzIC0tIGFuIEhW TU9QIHdoaWNoIGNvbnRhaW5zIGZ1bmN0aW9uYWxpdHkKPiBleHBlY3RlZCB0byBiZSB1c2VkIGJ5 IHRoZSAnaW50ZXJuYWwnIGFnZW50LCBhbmQgYSBET01DVEwgZm9yCj4gZnVuY3Rpb25hbGl0eSB3 aGljaCBpcyBleHBlY3RlZCB0byBiZSB1c2VkIG9ubHkgYmUgdGhlICdpbnRlcm5hbCcKPiBhZ2Vu dC4KPiAKPiBDLiBBZ3JlZSB0byBhZGQgYWxsIG5ldyBzdWJvcHMgdG8gdGhlIGN1cnJlbnQgaHlw ZXJjYWxsIChIVk1PUCksIGV2ZW4KPiBpZiB3ZSdyZSBub3Qgc3VyZSBpZiB0aGV5IHNob3VsZCBi ZSBleHBvc2VkIHRvIHRoZSBndWVzdC4KPiAKPiBJIHRoaW5rIEEgaXMgYSB0ZXJyaWJsZSBpZGVh LiAgSGF2aW5nIGEgc2luZ2xlIGluLWd1ZXN0IGFnZW50IGlzIGEKPiByZWFzb25hYmxlIGRlc2ln biBjaG9pY2UsIGFuZCBhcHBhcmVudGx5IGl0IHdhcyBldmVuIGltcGxlbWVudGVkIGF0Cj4gc29t ZSBwb2ludDsgd2Ugc2hvdWxkIG1ha2UgaXQgc3RyYWlnaHRmb3J3YXJkIGZvciBzb21lb25lIGlu IHRoZQo+IGZ1dHVyZSB0byBwaWNrIHVwIHRoZSB3b3JrIGlmIHRoZXkgd2FudCB0by4KPiAKPiBJ IHRoaW5rIEIgaXMgYWxzbyBhIHRlcnJpYmxlIGlkZWEuICBUaGUgcGVvcGxlIGV4dGVuZGluZyBp dCBhdCB0aGUKPiBtb21lbnQgYXJlIHByaW1hcmlseSBjb25jZXJuZWQgd2l0aCB0aGUgJ2V4dGVy bmFsJyB1c2UgY2FzZS4gIFRoZXJlIGlzCj4gbm9ib2R5IGFyb3VuZCB0byByZXByZXNlbnQgd2hl dGhlciBuZXcgZnVuY3Rpb25hbGl0eSBzaG91bGQgZW5kIHVwIGluCj4gdGhlIEhWTU9QIG9yIHRo ZSBET01DVEwsIHdoaWNoIG1lYW5zIHRoYXQgYnkgZGVmYXVsdCBpdCB3aWxsIGVuZCB1cCBpbgo+ IHRoZSBET01DVEwuICBJZiBpdCBpcyBkaXNjb3ZlcmVkLCBhZnRlcndhcmRzLCB0aGF0IHRoZSBu ZXcgb3BlcmF0aW9ucwo+ICp3b3VsZCogYmUgc2FmZSBhbmQgdXNlZnVsIGZvciB0aGUgJ2ludGVy bmFsJyB1c2UgY2FzZSwgdGhlbiB3ZSB3aWxsCj4gaGF2ZSB0byBkdXBsaWNhdGUgdGhlbSBpbnNp ZGUgdGhlIEhWTU9QLgo+IAo+IEl0IGp1c3QgbWFrZXMgbW9yZSBzZW5zZSB0byBoYXZlIGFsbCB0 aGUgYWx0cDJtIG9wZXJhdGlvbnMgaW4gYSBzaW5nbGUKPiBwbGFjZSwgYW5kIGEgc2ltcGxlIHdh eSB0byBjb250cm9sIHdoZXRoZXIgdGhleSdyZSBhdmFpbGFibGUgdG8gdGhlCj4gJ2ludGVybmFs JyB1c2UgY2FzZSBvciBub3QuICBBcyBzdWNoLCBJIGFtIHByb3Bvc2luZyAnQycuICBJIGtub3cg SmFuCj4gY29uc2lkZXJzIHRoaXMgImJhZG5lc3MiLCBhbmQgb2JqZWN0cyB0byB0aGUgY29udGlu dWFsICJleHRlbnNpb24iIG9mCj4gdGhlICJiYWRuZXNzIiwgYnV0IEkgZGlzYWdyZWUsIGFuZCBJ IHN0cm9uZ2x5IG9iamVjdCB0byB0aGUgb3RoZXIgdHdvCj4gb3B0aW9ucy4KPiAKPiBEaXNhYmxp bmcgbmV3IHN1Ym9wcyBmb3IgdGhlICdpbnRlcm5hbCcgdXNlIGNhc2UgYnkgZGVmYXVsdCBtZWFu cyB0aGF0Cj4gd2UgY2FuIGFkZCBuZXcgc3Vib3BzIHdpdGhvdXQgd29ycnlpbmcgYWJvdXQgbWFr aW5nIHRoZSAnaW50ZXJuYWwnIHVzZQo+IGNhc2UgbGVzcyBzZWN1cmU7IGJ1dCBpZiBpbiB0aGUg ZnV0dXJlIHNvbWVvbmUgbWFrZXMgdGhlIGNhc2UgdGhhdAo+IHRoZXkgYXJlIHNhZmUgYW5kIG5l Y2Vzc2FyeSwgd2UgY2FuIGVuYWJsZSB0aGVtIHdpdGhvdXQgaGF2aW5nIGNvZGUKPiBkdXBsaWNh dGlvbi4KPiAKPiBJbiBhbnkgY2FzZSBuZWVkIHRvIGNvbWUgdG8gYW4gYWdyZWVtZW50IG9uY2Ug YW5kIGZvciBhbGwgc28gdGhhdAo+IFRhbWFzIGFuZCBSYXp2YW4gY2FuIGRvIHRoZWlyIHdvcmsg d2l0aG91dCBjb250aW51YWwgYXJndW1lbnRzIG92ZXIgYQo+IG1vZGUgdGhleSdyZSBub3QgdXNp bmcuCj4gLS0tCj4gIHhlbi9hcmNoL3g4Ni9odm0vaHZtLmMgfCAyOCArKysrKysrKysrKysrKysr KysrKysrKysrKysrCj4gIDEgZmlsZSBjaGFuZ2VkLCAyOCBpbnNlcnRpb25zKCspCj4gCj4gZGlm ZiAtLWdpdCBhL3hlbi9hcmNoL3g4Ni9odm0vaHZtLmMgYi94ZW4vYXJjaC94ODYvaHZtL2h2bS5j Cj4gaW5kZXggZTAyMmY1YWIwZS4uOTBhNGJlNWU4NiAxMDA2NDQKPiAtLS0gYS94ZW4vYXJjaC94 ODYvaHZtL2h2bS5jCj4gKysrIGIveGVuL2FyY2gveDg2L2h2bS9odm0uYwo+IEBAIC00NDYwLDYg KzQ0NjAsMzQgQEAgc3RhdGljIGludCBodm1vcF9nZXRfcGFyYW0oCj4gICAgICByZXR1cm4gcmM7 Cj4gIH0KPiAgCj4gKy8qCj4gKyAqIGFsdHAybSBvcGVyYXRpb25zIGFyZSBlbnZpc2lvbmVkIGFz IGJlaW5nIHVzZWQgaW4gc2V2ZXJhbCBkaWZmZXJlbnQgCj4gKyAqIG1vZGVzOgo+ICsgKiAKPiAr ICogLSBleHRlcm5hbDogQWxsIGNvbnRyb2wgYW5kIGRlY2lzaW9ucyBhcmUgbWFkZSBieSBhbiBl eHRlcm5hbCBhZ2VudAo+ICsgKiAgIHJ1bm5pbmcgZG9tYWluIDAuCj4gKyAqCj4gKyAqIC0gaW50 ZXJuYWw6IGFsdHAybSBvcGVyYXRpb25zIGFyZSB1c2VkIGV4Y2x1c2l2ZWx5IGJ5IGFuIGluLWd1 ZXN0IGFnZW50Cj4gKyAqICAgdG8gcHJvdGVjdCBpdHNlbGYgZnJvbSB0aGUgZ3Vlc3Qga2VybmVs IGFuZCBpbi1ndWVzdCBhdHRhY2tlcnMuICAKPiArICogCj4gKyAqIC0gY29vcmRpbmF0ZWQ6IEFu IGluLWd1ZXN0IGFnZW50IGhhbmRsZXMgI1ZFIGFuZCBWTUZVTkNzIGxvY2FsbHksCj4gKyAqICAg YnV0IG1ha2VzIHJlcXVlc3RzIG9mIGFuIGV4dGVybmFsIGVudGl0eSBmb3IgYmlnZ2VyIGNoYW5n ZXMgKHN1Y2gKPiArICogICBhcyBtb2RpZnlpbmcgYWx0cDJtIGVudGlyZXMpLgo+ICsgKgo+ICsg KiBUaGlzIGNvcnJlc3BvbmRzIHRvIHRoZSB0aHJlZSB2YWx1ZXMgZm9yIEhWTV9QQVJBTV9BTFRQ Mk0KPiArICogKGV4dGVybmFsLCBtaXhlZCwgbGltaXRlZCkuIEFsbCB0aHJlZSBtb2RlbHMgaGF2 ZSBhZHZhbnRhZ2VzIGFuZAo+ICsgKiBkaXNhZHZhbnRhZ2VzLgo+ICsgKgo+ICsgKiBOb3JtYWxs eSBoeXBlcmNhbGxzIG1hZGUgYnkgYSBwcm9ncmFtIGluIGRvbWFpbiAwIGluIG9yZGVyIHRvCj4g KyAqIGNvbnRyb2wgYSBndWVzdCB3b3VsZCBiZSBET01DVExzIHJhdGhlciB0aGFuIEhWTU9Qcy4g IEJ1dCBpbiBvcmRlcgo+ICsgKiB0byBwcm9wZXJseSBlbmFibGUgdGhlICdpbnRlcm5hbCcgdXNl IGNhc2UsIGFzIHdlbGwgYXMgdG8gYXZvaWQKPiArICogZnJhZ21lbnRhdGlvbiwgYWxsIGFsdHAy bSBzdWJvcHMgc2hvdWxkIGNvbWUgdW5kZXIgdGhpcyBzaW5nbGUKPiArICogSFZNT1AuCj4gKyAq Cj4gKyAqIE5ldyBzdWJvcHMgd2hpY2ggbWF5IG5vdCBiZSBzdWl0YWJsZSBmb3IgdGhlICdpbnRl cm5hbCcgdXNlIGNhc2UKPiArICogc2hvdWxkIGJlIGRpc2FibGVkIGluIHRoZSAiWEVOX0FMVFAy TV9taXhlZCIgY2FzZSBpbgo+ICsgKiB4c21faHZtX2FsdHAybWh2bV9vcCgpLgo+ICsgKi8KPiAg c3RhdGljIGludCBkb19hbHRwMm1fb3AoCj4gICAgICBYRU5fR1VFU1RfSEFORExFX1BBUkFNKHZv aWQpIGFyZykKPiAgewo+IAoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2pl Y3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4t ZGV2ZWw=