From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Xu, Quan" Subject: Re: [PATCH v2 02/11] IOMMU: handle IOMMU mapping and unmapping failures Date: Wed, 27 Apr 2016 14:26:30 +0000 Message-ID: <945CA011AD5F084CBEA3E851C0AB28894B895E75@SHSMSX101.ccr.corp.intel.com> References: <1460988011-17758-1-git-send-email-quan.xu@intel.com> <1460988011-17758-3-git-send-email-quan.xu@intel.com> <571DFF0002000078000E5349@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <571DFF0002000078000E5349@prv-mh.provo.novell.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich Cc: "dario.faggioli@citrix.com" , "xen-devel@lists.xen.org" List-Id: xen-devel@lists.xenproject.org T24gQXByaWwgMjUsIDIwMTYgNToyNyBQTSwgSmFuIEJldWxpY2ggPEpCZXVsaWNoQHN1c2UuY29t PiB3cm90ZToNCj4gPj4+IE9uIDE4LjA0LjE2IGF0IDE2OjAwLCA8cXVhbi54dUBpbnRlbC5jb20+ IHdyb3RlOg0KPiA+IC0tLSBhL3hlbi9kcml2ZXJzL3Bhc3N0aHJvdWdoL2lvbW11LmMNCj4gPiAr KysgYi94ZW4vZHJpdmVycy9wYXNzdGhyb3VnaC9pb21tdS5jDQo+ID4gQEAgLTI0MywyMSArMjQz LDMzIEBAIGludCBpb21tdV9tYXBfcGFnZShzdHJ1Y3QgZG9tYWluICpkLA0KPiB1bnNpZ25lZCBs b25nIGdmbiwgdW5zaWduZWQgbG9uZyBtZm4sDQo+ID4gICAgICAgICAgICAgICAgICAgICB1bnNp Z25lZCBpbnQgZmxhZ3MpICB7DQo+ID4gICAgICBzdHJ1Y3QgaHZtX2lvbW11ICpoZCA9IGRvbWFp bl9odm1faW9tbXUoZCk7DQo+ID4gKyAgICBpbnQgcmM7DQo+ID4NCj4gPiAgICAgIGlmICggIWlv bW11X2VuYWJsZWQgfHwgIWhkLT5wbGF0Zm9ybV9vcHMgKQ0KPiA+ICAgICAgICAgIHJldHVybiAw Ow0KPiA+DQo+ID4gLSAgICByZXR1cm4gaGQtPnBsYXRmb3JtX29wcy0+bWFwX3BhZ2UoZCwgZ2Zu LCBtZm4sIGZsYWdzKTsNCj4gPiArICAgIHJjID0gaGQtPnBsYXRmb3JtX29wcy0+bWFwX3BhZ2Uo ZCwgZ2ZuLCBtZm4sIGZsYWdzKTsNCj4gPiArDQo+ID4gKyAgICBpZiAoIHJjICYmICFpc19oYXJk d2FyZV9kb21haW4oZCkgKQ0KPiA+ICsgICAgICAgIGRvbWFpbl9jcmFzaChkKTsNCj4gPiArDQo+ ID4gKyAgICByZXR1cm4gcmM7DQo+ID4gIH0NCj4gDQo+IEFzIHNhaWQgYmVmb3JlIC0gbGV0dGlu ZyB0aGlzIGdvIGNvbXBsZXRlbHkgc2lsZW50bHkgZm9yIHRoZSBoYXJkd2FyZSBkb21haW4gaXMN Cj4gYmFkLiBBdCBsZWFzdCB0aGUgZmlyc3QgaW5zdGFuY2Ugb2Ygc3VjaCBhbiBldmVudCBuZWVk cyBhIG1lc3NhZ2UgdG8gYmUgbG9nZ2VkLg0KPiBBZHZhbmNlZCB2YXJpYW50cyB3aGVyZSBhIG1l c3NhZ2UgZ2V0cyBsb2dnZWQgb25jZSBpbiBhIHdoaWxlIGlmIHRoZSBpc3N1ZSByZS0NCj4gb2Nj dXJzIHdvdWxkIGJlIG5pY2UsIGJ1dCBhcmVuJ3Qgc3RyaWN0bHkgbmVjZXNzYXJ5IGltby4gQW5k IG5vdGUgdGhhdCBldmVuDQo+IGxvZ2dpbmcgYWxsIG9jY3VycmVuY2VzIHdvdWxkIG5vdCBiZSBh IHNlY3VyaXR5IGlzc3VlLCBidXQganVzdCBhIHVzYWJpbGl0eSBvbmUNCj4gKGJ1dCBJIHN0aWxs IHJlY29tbWVuZCBhZ2FpbnN0IHRoaXMpLg0KPiANCg0KSU1PIHRoZSBJT01NVSBtYXAvdW5tYXAg ZmFpbHVyZXMgIGFyZSB0aGUgc21hbGwgcHJvYmFiaWxpdHkgZXZlbnRzLiAgSSB0aGluayB0aGUg bG9nIG1lc3NhZ2Ugd291bGRuJ3QgDQpzcGFtIGxvZyBtZXNzYWdlLg0KDQpJJ2QgbGlrZSBtb2Rp ZnkgaXQgYXMgZm9sbG93aW5nOg0KLS0tIGEveGVuL2RyaXZlcnMvcGFzc3Rocm91Z2gvaW9tbXUu Yw0KKysrIGIveGVuL2RyaXZlcnMvcGFzc3Rocm91Z2gvaW9tbXUuYw0KQEAgLTI0MywxMSArMjQz LDI0IEBAIGludCBpb21tdV9tYXBfcGFnZShzdHJ1Y3QgZG9tYWluICpkLCB1bnNpZ25lZCBsb25n IGdmbiwgdW5zaWduZWQgbG9uZyBtZm4sDQogICAgICAgICAgICAgICAgICAgIHVuc2lnbmVkIGlu dCBmbGFncykNCiB7DQogICAgIHN0cnVjdCBodm1faW9tbXUgKmhkID0gZG9tYWluX2h2bV9pb21t dShkKTsNCisgICAgaW50IHJjOw0KDQogICAgIGlmICggIWlvbW11X2VuYWJsZWQgfHwgIWhkLT5w bGF0Zm9ybV9vcHMgKQ0KICAgICAgICAgcmV0dXJuIDA7DQoNCi0gICAgcmV0dXJuIGhkLT5wbGF0 Zm9ybV9vcHMtPm1hcF9wYWdlKGQsIGdmbiwgbWZuLCBmbGFncyk7DQorICAgIHJjID0gaGQtPnBs YXRmb3JtX29wcy0+bWFwX3BhZ2UoZCwgZ2ZuLCBtZm4sIGZsYWdzKTsNCisNCisgICAgaWYgKCBy YyApDQorICAgIHsNCisgICAgICAgIHByaW50ayhYRU5MT0dfRVJSDQorICAgICAgICAgICAgICAg ImlvbW11X21hcF9wYWdlOiBJT01NVSBtYXBwaW5nIGdmbiAlI2x4IG1mbiAlI2x4IGZhaWxlZCBm b3IgZG9tJWQuIiwNCisgICAgICAgICAgICAgICBnZm4sIG1mbiwgZC0+ZG9tYWluX2lkKTsNCisN CisgICAgICAgIGlmICggIWlzX2hhcmR3YXJlX2RvbWFpbihkKSApDQorICAgICAgICAgICAgZG9t YWluX2NyYXNoKGQpOw0KKyAgICB9DQorDQorICAgIHJldHVybiByYzsNCiB9DQoNCiBpbnQgaW9t bXVfdW5tYXBfcGFnZShzdHJ1Y3QgZG9tYWluICpkLCB1bnNpZ25lZCBsb25nIGdmbikNCg0KDQoN CmJ0dywgaW4gY2FzZSAgSSBoYXZlIHByaW50LW91dCBmb3IgbWFwcGluZyBmYWlsdXJlLCBJIHRo aW5rIGl0IGlzIG5vIG5lZWQgIHRvIHByaW50IG91dCBhbiBleHRyYSBtZXNzYWdlIGZvciB0aGUg aGFyZHdhcmUgZG9tYWluLg0KSWYgdGhpcyBpcyBzdGlsbCBub3Qgd2hhdCB5b3Ugd2FudCwgSSds bCBjb250aW51ZSB0byBlbmhhbmNlIGl0LiBBbHNvIEkgYW0gbm90IGdvb2QgYXQgZGVzY3JpcHRp b24sIHNvIEkgdHJ5IHRvIHNlbmQgb3V0IGNvZGUgbW9kaWZpY2F0aW9uIGRpcmVjdGx5LiANCg0K DQpEaXR0byBmb3IgaW9tbXVfdW5tYXBfcGFnZSgpLg0KDQoNClF1YW4NCg0KDQoNCg0KDQoNCg0K X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVs IG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9y Zy94ZW4tZGV2ZWwK