From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Durrant Subject: Re: [PATCH] x86/mm/p2m: don't needlessly limit MMIO mapping order to 4k Date: Wed, 17 Oct 2018 14:02:49 +0000 Message-ID: <90ebe304b3e9450980ac453e3b02c307@AMSPEX02CL03.citrite.net> References: <20181016144155.24646-1-paul.durrant@citrix.com> <22edb60f-3fb4-3f3c-8975-b4ab565d5acb@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gCmRK-0002db-AR for xen-devel@lists.xenproject.org; Wed, 17 Oct 2018 14:04:46 +0000 In-Reply-To: <22edb60f-3fb4-3f3c-8975-b4ab565d5acb@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: Andrew Cooper , "xen-devel@lists.xenproject.org" Cc: Wei Liu , George Dunlap , Jan Beulich List-Id: xen-devel@lists.xenproject.org PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KPiBGcm9tOiBBbmRyZXcgQ29vcGVyDQo+IFNl bnQ6IDE3IE9jdG9iZXIgMjAxOCAxNDoyNA0KPiBUbzogUGF1bCBEdXJyYW50IDxQYXVsLkR1cnJh bnRAY2l0cml4LmNvbT47IHhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZw0KPiBDYzogR2Vv cmdlIER1bmxhcCA8R2VvcmdlLkR1bmxhcEBjaXRyaXguY29tPjsgSmFuIEJldWxpY2gNCj4gPGpi ZXVsaWNoQHN1c2UuY29tPjsgV2VpIExpdSA8d2VpLmxpdTJAY2l0cml4LmNvbT4NCj4gU3ViamVj dDogUmU6IFtQQVRDSF0geDg2L21tL3AybTogZG9uJ3QgbmVlZGxlc3NseSBsaW1pdCBNTUlPIG1h cHBpbmcgb3JkZXINCj4gdG8gNGsNCj4gDQo+IE9uIDE2LzEwLzE4IDE1OjQxLCBQYXVsIER1cnJh bnQgd3JvdGU6DQo+ID4gVGhlIFAyTSBjb21tb24gY29kZSBjdXJyZW50bHkgcmVzdHJpY3RzIHRo ZSBNTUlPIG1hcHBpbmcgb3JkZXIgb2YgYW55DQo+ID4gZG9tYWluIHdpdGggSU9NTVUgbWFwcGlu Z3MsIGJ1dCB0aGF0IGlzIG5vdCB1c2luZyBzaGFyZWQgdGFibGVzLCB0byA0ay4NCj4gPiBUaGlz IGhhcyBiZWVuIHNob3duIHRvIGhhdmUgYSBodWdlIHBlcmZvcm1hbmNlIGNvc3Qgd2hlbiBwYXNz aW5nIHRocm91Z2gNCj4gPiBhIFBDSSBkZXZpY2Ugd2l0aCBhIHZlcnkgbGFyZ2UgQkFSIChlLmcu IE5WSURJQSBQNDApLCBpbmNyZWFzaW5nIHRoZQ0KPiBndWVzdA0KPiA+IGJvb3QgdGltZSBmcm9t IH4yMHMgdG8gc2V2ZXJhbCBtaW51dGVzIHdoZW4gaW9tbXU9bm8tc2hhcmVwdCBpcw0KPiBzcGVj aWZpZWQNCj4gPiBvbiB0aGUgWGVuIGNvbW1hbmQgbGluZS4NCj4gPg0KPiA+IFRoZSBsaW1pdGF0 aW9uIHdhcyBhZGRlZCBieSBjb21taXQgYzNjNzU2YmQgIng4Ni9wMm06IHVzZSBsYXJnZSBwYWdl cw0KPiA+IGZvciBNTUlPIG1hcHBpbmdzIiBob3dldmVyIHRoZSB1bmRlcmx5aW5nIGltcGxlbWVu dGF0aW9ucyBvZiBwMm0tDQo+ID5zZXRfZW50cnkNCj4gPiBmb3IgSW50ZWwgYW5kIEFNRCBhcmUg Y29kZWQgdG8gY29wZSB3aXRoIG1hcHBpbmcgb3JkZXJzIGhpZ2hlciB0aGFuIDRrLA0KPiA+IGV2 ZW4gdGhvdWdoIHRoZSBJT01NVSBtYXBwaW5nIGZ1bmN0aW9uIGlzIGl0c2VsZiBjdXJyZW50bHkg bGltaXRlZCB0bw0KPiA0aywNCj4gPiBzbyB0aGVyZSBpcyBubyByZWFsIG5lZWQgdG8gbGltaXQg dGhlIG9yZGVyIHBhc3NlZCBpbnRvIHRoZSBtZXRob2QuDQo+ID4NCj4gPiBXaXRoIHRoaXMgcGF0 Y2ggYXBwbGllZCB0aGUgVk0gYm9vdCB0aW1lIGlzIHJlc3RvcmVkIHRvIHNvbWV0aGluZw0KPiA+ IHJlYXNvbmFibGUuIE5vdCBhcyBmYXN0IGFzIHdpdGhvdXQgaW9tbXU9bm8tc2hhcmVwdCwgYnV0 IHdpdGhpbiBhIGZldw0KPiA+IHNlY29uZHMgb2YgaXQuDQo+ID4NCj4gPiBOT1RFOiBUaGlzIHBh dGNoIHRha2VzIHRoZSBvcHBvcnR1bml0eSB0byBzaG9ydGVuIGEgY291cGxlIG9mID4gODANCj4g PiAgICAgICBjaGFyYWN0ZXIgbGluZXMgaW4gdGhlIGNvZGUuDQo+ID4NCj4gPiBTaWduZWQtb2Zm LWJ5OiBQYXVsIER1cnJhbnQgPHBhdWwuZHVycmFudEBjaXRyaXguY29tPg0KPiANCj4gSSdtIGFm cmFpZCB0aGF0IGl0IGlzbid0IG5lZWRsZXNzLg0KPiANCj4gVGhlIGZhY3QgdGhhdCB0aGUgdW5k ZXJseWluZyBJT01NVSBmdW5jdGlvbnMgY2FuIG9ubHkgd29yayB3aXRoIDRrDQo+IHBhZ2VzLCBp biBjb21iaW5hdGlvbiB3aXRoIG5vIC1FUmVzdGFydCBzdXBwb3J0LCBpcyBwcmVjaXNlbHkgd2h5 IHlvdQ0KPiBtdXN0IG9ubHkgZXZlciBwYXNzIGEgNGsgb3JkZXIgaGVyZS7CoCBPdGhlcndpc2Ug d2Ugd2lsbCBnZW51aW5lbHkgd2FpdA0KPiBmb3IgdGhlIElPTU1VIHRvIG1hcC91bm1hcCAxRyB3 b3J0aCBvZiA0ayBwYWdlcyBhdCBhIHRpbWUsIHdoaWNoIHRoZQ0KPiBzZWN1cml0eSB0ZWFtIGhh cyBwcmV2aW91c2x5IGRlZW1lZCBpcyB0b28gbG9uZyB0byB3YWl0IGZvciBhIHNpbmdsZQ0KPiBv cGVyYXRpb24uDQo+IA0KDQpPaywgSSBhZ3JlZSB0aGF0IHRoZXJlIG1heSBiZSBhbiBpc3N1ZSB3 aXRoIDFHIGJ1dCBub3QgZm9yIDJNLiBJIGhhdmUgdGVzdGVkIHRoZSBwYXRjaCBhbmQsIGFzIEkg c2FpZCBpbiBteSBjb21tZW50LCB0aGUgdG90YWwgY29zdCBvZiB0aGUgYWxsIHRoZSBkb21jdGxz IHdhcyBiYXJlbHkgZGlmZmVyZW50IGZyb20gd2hlbiBwYWdlIHNoYXJpbmcgd2FzIHR1cm5lZCBv bi4NCg0KPiBJJ20gYWZyYWlkIHRoYXQgdGhlIG9ubHkgc2FmZSBvcHRpb24gSSBzZWUgaGVyZSBp cyB0byBtYWtlIHRoZSBwMm0NCj4gb3BlcmF0aW9ucyBzdXBwb3J0IHByb3Blcmx5IHByZWVtcHRp YmxlLg0KPiANCg0KVGhhdCdzIGEgbG90IG9mIHJlLXdvcmsuIEkgYWdyZWUgaXQgaXMgdGhlIGNv cnJlY3Qgc29sdXRpb24gYnV0IHdpdGhvdXQgYSBwYXRjaCB0byBhbGxvdyBhdCBsZWFzdCAyTSBt YXBwaW5nLCBhIHN5c3RlbSB3aXRob3V0IHNoYXJlZCB0YWJsZXMgaXMgdW51c2FibGUgc28gSSB0 aGluayBzdWNoIGEgcGF0Y2ggaXMgcmVhc29uYWJsZSBzdG9wLWdhcC4NCg0KICBQYXVsDQoNCj4g fkFuZHJldw0KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K WGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0 cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==