From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerome Glisse Subject: Re: [RFC PATCH 3/5] mm/vma: add support for peer to peer to device vma Date: Wed, 30 Jan 2019 16:45:25 -0500 Message-ID: <20190130214525.GG5061@redhat.com> References: <655a335c-ab91-d1fc-1ed3-b5f0d37c6226@deltatee.com> <20190130041841.GB30598@mellanox.com> <20190130185652.GB17080@mellanox.com> <20190130192234.GD5061@redhat.com> <20190130193759.GE17080@mellanox.com> <20190130201114.GB17915@mellanox.com> <20190130204332.GF5061@redhat.com> <20190130204954.GI17080@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <20190130204954.GI17080@mellanox.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Jason Gunthorpe Cc: Joerg Roedel , "Rafael J . Wysocki" , Greg Kroah-Hartman , Felix Kuehling , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , Christoph Hellwig , "linux-mm@kvack.org" , "iommu@lists.linux-foundation.org" , "linux-pci@vger.kernel.org" , Bjorn Helgaas , Robin Murphy , Logan Gunthorpe , Christian Koenig , Marek Szyprowski List-Id: iommu@lists.linux-foundation.org T24gV2VkLCBKYW4gMzAsIDIwMTkgYXQgMDg6NTA6MDBQTSArMDAwMCwgSmFzb24gR3VudGhvcnBl IHdyb3RlOgo+IE9uIFdlZCwgSmFuIDMwLCAyMDE5IGF0IDAzOjQzOjMyUE0gLTA1MDAsIEplcm9t ZSBHbGlzc2Ugd3JvdGU6Cj4gPiBPbiBXZWQsIEphbiAzMCwgMjAxOSBhdCAwODoxMToxOVBNICsw MDAwLCBKYXNvbiBHdW50aG9ycGUgd3JvdGU6Cj4gPiA+IE9uIFdlZCwgSmFuIDMwLCAyMDE5IGF0 IDAxOjAwOjAyUE0gLTA3MDAsIExvZ2FuIEd1bnRob3JwZSB3cm90ZToKPiA+ID4gCj4gPiA+ID4g V2UgbmV2ZXIgY2hhbmdlZCBTR0xzLiBXZSBzdGlsbCB1c2UgdGhlbSB0byBwYXNzIHAycGRtYSBw YWdlcywgb25seSB3ZQo+ID4gPiA+IG5lZWQgdG8gYmUgYSBiaXQgY2FyZWZ1bCB3aGVyZSB3ZSBz ZW5kIHRoZSBlbnRpcmUgU0dMLiBJIHNlZSBubyByZWFzb24KPiA+ID4gPiB3aHkgd2UgY2FuJ3Qg Y29udGludWUgdG8gYmUgY2FyZWZ1bCBvbmNlIHRoZWlyIGluIHVzZXJzcGFjZSBpZiB0aGVyZSdz Cj4gPiA+ID4gc29tZXRoaW5nIGluIEdVUCB0byBkZW55IHRoZW0uCj4gPiA+ID4gCj4gPiA+ID4g SXQgd291bGQgYmUgbmljZSB0byBoYXZlIGhldGVyb2dlbmVvdXMgU0dMcyBhbmQgaXQgaXMgc29t ZXRoaW5nIHdlCj4gPiA+ID4gc2hvdWxkIHdvcmsgdG93YXJkIGJ1dCBpbiBwcmFjdGljZSB0aGV5 IGFyZW4ndCByZWFsbHkgbmVjZXNzYXJ5IGF0IHRoZQo+ID4gPiA+IG1vbWVudC4KPiA+ID4gCj4g PiA+IFJETUEgZ2VuZXJhbGx5IGNhbm5vdCBjb3BlIHdlbGwgd2l0aCBhbiBBUEkgdGhhdCByZXF1 aXJlcyBob21vZ2VuZW91cwo+ID4gPiBTR0xzLi4gVXNlciBzcGFjZSBjYW4gY29uc3RydWN0IGNv bXBsZXggTVJzIChwYXJ0aWN1bGFybHkgd2l0aCB0aGUKPiA+ID4gcHJvcG9zZWQgU0dMIE1SIGZs b3cpIGFuZCB3ZSBtdXN0IG1hcnNoYWwgdGhhdCBpbnRvIGEgc2luZ2xlIFNHTCBvcgo+ID4gPiB0 aGUgZHJpdmVycyBmYWxsIGFwYXJ0Lgo+ID4gPiAKPiA+ID4gSmVyb21lIGV4cGxhaW5lZCB0aGF0 IEdQVSBpcyB3b3JzZSwgYSBzaW5nbGUgVk1BIG1heSBoYXZlIGEgcmFuZG9tIG1peAo+ID4gPiBv ZiBDUFUgb3IgZGV2aWNlIHBhZ2VzLi4KPiA+ID4gCj4gPiA+IFRoaXMgaXMgYSBwcmV0dHkgYmln IGJsb2NrZXIgdGhhdCB3b3VsZCBoYXZlIHRvIHNvbWVob3cgYmUgZml4ZWQuCj4gPiAKPiA+IE5v dGUgdGhhdCBITU0gdGFrZXMgY2FyZSBvZiB0aGF0IFJETUEgT0RQIHdpdGggbXkgT0RQIHRvIEhN TSBwYXRjaCwKPiA+IHNvIHdoYXQgeW91IGdldCBmb3IgYW4gT0RQIHVtZW0gaXMganVzdCBhIGxp c3Qgb2YgZG1hIGFkZHJlc3MgeW91Cj4gPiBjYW4gcHJvZ3JhbSB5b3VyIGRldmljZSB0by4gVGhl IGFpbSBpcyB0byBhdm9pZCB0aGUgZHJpdmVyIHRvIGNhcmUKPiA+IGFib3V0IHRoYXQuIFRoZSBh Y2Nlc3MgcG9saWN5IHdoZW4gdGhlIFVNRU0gb2JqZWN0IGlzIGNyZWF0ZWQgYnkKPiA+IHVzZXJz cGFjZSB0aHJvdWdoIHZlcmJzIEFQSSBzaG91bGQgaG93ZXZlciBhc2NlcnRhaW4gdGhhdCBmb3Ig bW1hcAo+ID4gb2YgZGV2aWNlIGZpbGUgaXQgaXMgb25seSBjcmVhdGluZyBhIFVNRU0gdGhhdCBp cyBmdWxseSBjb3ZlcmVkIGJ5Cj4gPiBvbmUgYW5kIG9ubHkgb25lIHZtYS4gR1BVIGRldmljZSBk cml2ZXIgd2lsbCBoYXZlIG9uZSB2bWEgcGVyIGxvZ2ljYWwKPiA+IEdQVSBvYmplY3QuIEkgZXhw ZWN0IG90aGVyIGtpbmQgb2YgZGV2aWNlIGRvIHRoYXQgc2FtZSBzbyB0aGF0IHRoZXkKPiA+IGNh biBtYXRjaCBhIHZtYSB0byBhIHVuaXF1ZSBvYmplY3QgaW4gdGhlaXIgZHJpdmVyLgo+IAo+IEEg b25lIFZNQSBydWxlIGlzIG5vdCByZWFsbHkgd29ya2FibGUuCj4gCj4gV2l0aCBPRFAgVk1BIGJv dW5kYXJpZXMgY2FuIG1vdmUgYXJvdW5kIGFjcm9zcyB0aGUgbGlmZXRpbWUgb2YgdGhlIE1SCj4g YW5kIHdlIGhhdmUgbm8gb2J2aW91cyB3YXkgdG8gZmFpbCBhbnl0aGluZyBpZiB1c2VycGFjZSBw dXRzIGEgVk1BCj4gYm91bmRhcnkgaW4gdGhlIG1pZGRsZSBvZiBhbiBleGlzdGluZyBPRFAgTVIg YWRkcmVzcyByYW5nZS4KClRoaXMgaXMgdHJ1ZSBvbmx5IGZvciB2bWEgdGhhdCBhcmUgbm90IG1t YXAgb2YgYSBkZXZpY2UgZmlsZS4gVGhpcyBpcwp3aGF0IGkgd2FzIHRyeWluZyB0byBnZXQgYWNj cm9zcy4gQW4gbW1hcCBvZiBhIGZpbGUgaXMgbmV2ZXIgbWVyZ2UKc28gaXQgY2FuIG9ubHkgZ2V0 IHNwbGl0L2J1dGNoZXIgYnkgbXVubWFwL21yZW1hcCBidXQgd2hlbiB0aGF0IGhhcHBlbgp5b3Ug YWxzbyBuZWVkIHRvIHJlZmxlY3QgdGhlIHZpcnR1YWwgYWRkcmVzcyBzcGFjZSBjaGFuZ2UgdG8g dGhlCmRldmljZSBpZSBhbnkgYWNjZXNzIHRvIGEgbm93IGludmFsaWQgcmFuZ2UgbXVzdCB0cmln Z2VyIGVycm9yLgoKPiAKPiBJIHRoaW5rIHRoZSBITU0gbWlycm9yIEFQSSByZWFsbHkgbmVlZHMg dG8gZGVhbCB3aXRoIHRoaXMgZm9yIHRoZQo+IGRyaXZlciBzb21laG93LgoKWWVzIHRoZSBITU0g ZG9lcyBkZWFsIHdpdGggdGhpcyBmb3IgeW91LCB5b3UgZG8gbm90IGhhdmUgdG8gd29ycnkgYWJv dXQKaXQuIFNvcnJ5IGlmIHRoYXQgd2FzIG5vdCBjbGVhci4gSSBqdXN0IHdhbnRlZCB0byBzdHJl c3MgdGhhdCB2bWEgdGhhdAphcmUgbW1hcCBvZiBhIGZpbGUgZG8gbm90IGJlaGF2ZSBsaWtlIG90 aGVyIHZtYSBoZW5jZSB3aGVuIHlvdSBjcmVhdGUKdGhlIFVNRU0geW91IGNhbiBjaGVjayBmb3Ig dGhvc2UgaWYgeW91IGZlZWwgdGhlIG5lZWQuCgpDaGVlcnMsCkrDqXLDtG1lCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxp c3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNr dG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbAo=