From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM05-DM3-obe.outbound.protection.outlook.com (mail-dm3nam05on0629.outbound.protection.outlook.com. [2a01:111:f400:fe51::629]) by gmr-mx.google.com with ESMTPS id f188si670303wme.0.2019.05.09.13.03.22 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 09 May 2019 13:03:22 -0700 (PDT) From: Gary R Hook Subject: Re: Fwd: AMD IO_PAGE_FAULT w/NTB on Write ops? Date: Thu, 9 May 2019 20:03:17 +0000 Message-ID: <8e4ccf44-9e4f-8007-ddcc-431440f9d533@amd.com> References: In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 To: Eric Pilmore , "Mehta, Sanju" Cc: S Taylor , D Meyer , linux-ntb , "linux-pci@vger.kernel.org" List-ID: T24gNC8yNC8xOSA1OjA0IFBNLCBFcmljIFBpbG1vcmUgd3JvdGU6DQo+IE9uIFR1ZSwgQXByIDIz LCAyMDE5IGF0IDQ6MDAgQU0gU2FuamF5IFIgTWVodGEgPHNhbm1laHRhQGFtZC5jb20+IHdyb3Rl Og0KPj4NCj4+DQo+Pj4gQU1ELVZpOiBFdmVudCBsb2dnZWQgW0lPX1BBR0VfRkFVTFQgZGV2aWNl PTIzOjAxLjIgZG9tYWluPTB4MDAwMA0KPj4+IGFkZHJlc3M9MHgwMDAwMDAwMGZkZTFjMThjIGZs YWdzPTB4MDA3MF0NCj4+DQo+PiB0aGUgYWRkcmVzcyBpbiB0aGUgYWJvdmUgbG9nIGxvb2tzIHRv IGJlIHBoeXNpY2FsIGFkZHJlc3Mgb2YgbWVtb3J5IHdpbmRvdy4gQW0gSSBSaWdodD8NCj4+DQo+ PiBJZiB5ZXMgdGhlbiwgdGhlIGZpcnN0IHBhcmFtZXRlciBvZiBkbWFfYWxsb2NfY29oZXJlbnQo KSB0byBiZSBwYXNzZWQgYXMgYmVsb3csDQo+Pg0KPj4gZG1hX2FsbG9jX2NvaGVyZW50KCZudGIt PnBkZXYtPmRldiwgLi4uKWluc3RlYWQgb2YgZG1hX2FsbG9jX2NvaGVyZW50KCZudGItPmRldiwg Li4uKS4NCj4+DQo+PiBIb3BlIHRoaXMgc2hvdWxkIHNvbHZlIHlvdXIgcHJvYmxlbS4NCj4gDQo+ IEhpIFNhbmpheSwNCj4gDQo+IFRoYW5rcyB0aGUgZm9yIHRoZSByZXNwb25zZS4gIFdlIGFyZSB1 c2luZyB0aGUgY29ycmVjdCBkZXZpY2UgZm9yIHRoZQ0KPiBkbWFfYWxsb2NfY29oZXJlbnQoKS4g VXBvbiBmdXJ0aGVyIGludmVzdGlnYXRpb24gd2hhdCB3ZSBhcmUgZmluZGluZw0KPiBpcyB0aGF0 IGFwcGFyZW50bHkgdGhlIEFNRCBJT01NVSBzdXBwb3J0IGNhbiBvbmx5IG1hbmFnZSBvbmUgYWxp YXMsIGFzDQo+IG9wcG9zZWQgdG8gSW50ZWwgSU9NTVUgc3VwcG9ydCB3aGljaCBjYW4gc3VwcG9y dCBtdWx0aXBsZS4gTm90IGNsZWFyDQo+IGF0IHRoaXMgdGltZSBpZiBpdCdzIGEgc29mdHdhcmUg bGltaXRhdGlvbiBpbiB0aGUgQU1EIElPTU1VIGtlcm5lbA0KPiBzdXBwb3J0IG9yIGFuIGltcG9z ZWQgbGltaXRhdGlvbiBvZiB0aGUgaGFyZHdhcmUuIFN0aWxsIGludmVzdGlnYXRpbmcuDQoNClBs ZWFzZSBkZWZpbmUgJ2FsaWFzJz8NCg0KVGhlIElPX1BBR0VfRkFVTFQgZXJyb3IgaXMgZGVzY3Jp YmVkIG9uIHBhZ2UgMTQyIG9mIHRoZSBBTUQgSU9NTVUgc3BlYywgDQpkb2N1bWVudCAjNDg4ODIu IEVhc2lseSBmb3VuZCB2aWEgYSBzZWFyY2guDQoNClRoZSBmbGFncyB2YWx1ZSBvZiAweDAwNzAg dHJhbnNsYXRlcyB0byBQRSwgUlcsIFBSLiBUaGUgcGFnZSB3YXMgDQpwcmVzZW50LCB0aGUgdHJh bnNhY3Rpb24gd2FzIGEgd3JpdGUsIGFuZCB0aGUgcGVyaXBoZXJhbCBkaWRuJ3QgaGF2ZSANCnBl cm1pc3Npb24uIFRoYXQgaW1wbGllcyB0aGF0IG1hcHBpbmcgaGFkbid0IGJlZW4gZG9uZS4NCg0K Tm90IGJlaW5nIHN1cmUgaG93IHRoYXQgZGV2aWNlIHByZXNlbnRzLCBvciB3aGF0IHlvdSdyZSBk b2luZyB3aXRoIElWSEQgDQppbmZvLCBJIGNhbid0IGNvbW1lbnQgZnVydGhlci4gSSBjYW4gc2F5 IHRoYXQgdGhlIEFNRCBJT01NVSBwcm92aWRlcyBmb3IgDQphIHNpbmdsZSBleGNsdXNpb24gcmFu Z2UsIGJ1dCBhcyBtYW55IHVuaXR5IHJhbmdlcyBhcyB5b3Ugd2lzaC4NCg0KSFRIDQoNCmdyaA0K