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: Tue, 29 Jan 2019 15:44:00 -0500 Message-ID: <20190129204359.GM3176@redhat.com> References: <20190129174728.6430-1-jglisse@redhat.com> <20190129174728.6430-4-jglisse@redhat.com> <20190129191120.GE3176@redhat.com> <20190129193250.GK10108@mellanox.com> <20190129195055.GH3176@redhat.com> <20190129202429.GL10108@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: <20190129202429.GL10108@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 T24gVHVlLCBKYW4gMjksIDIwMTkgYXQgMDg6MjQ6MzZQTSArMDAwMCwgSmFzb24gR3VudGhvcnBl IHdyb3RlOgo+IE9uIFR1ZSwgSmFuIDI5LCAyMDE5IGF0IDAyOjUwOjU1UE0gLTA1MDAsIEplcm9t ZSBHbGlzc2Ugd3JvdGU6Cj4gCj4gPiBHUFUgZHJpdmVyIGRvIHdhbnQgbW9yZSBjb250cm9sIDop IEdQVSBkcml2ZXIgYXJlIG1vdmluZyB0aGluZ3MgYXJvdW5kCj4gPiBhbGwgdGhlIHRpbWUgYW5k IHRoZXkgaGF2ZSBtb3JlIG1lbW9yeSB0aGFuIGJhciBzcGFjZSAob24gbmV3ZXIgcGxhdGZvcm0K PiA+IEFNRCBHUFUgZG8gcmVzaXplIHRoZSBiYXIgYnV0IGl0IGlzIG5vdCB0aGUgcnVsZSBmb3Ig YWxsIEdQVXMpLiBTbwo+ID4gR1BVIGRyaXZlciBkbyBhY3R1YWx5IG1hbmFnZSB0aGVpciBCQVIg YWRkcmVzcyBzcGFjZSBhbmQgdGhleSBtYXAgYW5kCj4gPiB1bm1hcCB0aGluZyB0aGVyZS4gVGhl eSBjYW4gbm90IGFsbG93IHNvbWVvbmUgdG8ganVzdCBwaW4gc3R1ZmYgdGhlcmUKPiA+IHJhbmRv bWx5IG9yIHRoaXMgd291bGQgZGlzcnVwdCB0aGVpciByZWd1bGFyIHdvcmsgZmxvdy4gSGVuY2Ug dGhleSBuZWVkCj4gPiBjb250cm9sIGFuZCB0aGV5IG1pZ2h0IGltcGxlbWVudCB0aHJlc2hvbGQg Zm9yIGluc3RhbmNlIGlmIHRoZXkgaGF2ZQo+ID4gbW9yZSB0aGFuIE4gcGFnZXMgb2YgYmFyIHNw YWNlIG1hcCBmb3IgcGVlciB0byBwZWVyIHRoZW4gdGhleSBjYW4gZGVjaWRlCj4gPiB0byBmYWxs IGJhY2sgdG8gbWFpbiBtZW1vcnkgZm9yIGFueSBuZXcgcGVlciBtYXBwaW5nLgo+IAo+IEJ1dCB0 aGlzIEFQSSBkb2Vzbid0IHNlZW0gdG8gb2ZmZXIgYW55IGNvbnRyb2wgLSBJIHRob3VnaHQgdGhh dAo+IGNvbnRyb2wgd2FzIGFsbCBjb21pbmcgZnJvbSB0aGUgbW0vaG1tIG5vdGlmaWVycyB0cmln Z2VyaW5nIHAycF91bm1hcHM/CgpUaGUgY29udHJvbCBpcyB3aXRoaW4gdGhlIGRyaXZlciBpbXBs ZW1lbnRhdGlvbiBvZiB0aG9zZSBjYWxsYmFja3MuIFNvCmRyaXZlciBpbXBsZW1lbnRhdGlvbiBj YW4gcmVmdXNlIHRvIG1hcCBieSByZXR1cm5pbmcgYW4gZXJyb3Igb24gcDJwX21hcApvciBpdCBj YW4gZGVjaWRlIHRvIHVzZSBtYWluIG1lbW9yeSBieSBtaWdyYXRpbmcgaXRzIG9iamVjdCB0byBt YWluIG1lbW9yeQphbmQgcG9wdWxhdGluZyB0aGUgZG1hIGFkZHJlc3MgYXJyYXkgd2l0aCBkbWFf cGFnZV9tYXAoKSBvZiB0aGUgbWFpbiBtZW1vcnkKcGFnZXMuIERyaXZlciBsaWtlIEdQVSBjYW4g aGF2ZSBwb2xpY3kgb24gdG9wIG9mIHRoYXQgZm9yIGluc3RhbmNlIHRoZXkKd2lsbCBvbmx5IGFs bG93IHAycCBtYXAgdG8gc3VjY2VlZCBmb3Igb2JqZWN0cyB0aGF0IGhhdmUgYmVlbiB0YWdnZWQg YnkgdGhlCnVzZXJzcGFjZSBpbiBzb21lIHdheSBpZSB0aGUgdXNlcnNwYWNlIGFwcGxpY2F0aW9u IGlzIGluIGNvbnRyb2wgb2Ygd2hhdApjYW4gYmUgbWFwIHRvIHBlZXIgZGV2aWNlLiBUaGlzIGlz IG5lZWRlZCBmb3IgR1BVIGRyaXZlciBhcyB3ZSBkbyB3YW50CnVzZXJzcGFjZSBpbnZvbHZlbWVu dCBvbiB3aGF0IG9iamVjdCBhcmUgYWxsb3dlZCB0byBoYXZlIHAycCBhY2Nlc3MgYW5kCmFsc28g c28gdGhhdCB3ZSBjYW4gcmVwb3J0IHRvIHVzZXJzcGFjZSB3aGVuIHdlIGFyZSBydW5uaW5nIG91 dCBvZiBCQVIKYWRkcmVzc2VzIGZvciB0aGlzIHRvIHdvcmsgYXMgaW50ZW5kZWQgKGllIG5vdCBm YWxsaW5nIGJhY2sgdG8gbWFpbiBtZW1vcnkpCnNvIHRoYXQgYXBwbGljYXRpb24gY2FuIHRha2Ug YXBwcm9wcmlhdGUgYWN0aW9ucyAobGlrZSBkZWNpZGUgd2hhdCB0bwpwcmlvcml0aXplKS4KCkZv ciBtb3ZpbmcgdGhpbmdzIGFyb3VuZCBhZnRlciBhIHN1Y2Nlc3NmdWwgcDJwX21hcCB5ZXMgdGhl IGV4cG9ydGluZwpkZXZpY2UgaGF2ZSB0byBjYWxsIGZvciBpbnN0YW5jZSB6YXBfdm1hX3B0ZXMo KSBvciBzb21ldGhpbmcgc2ltaWxhci4KVGhpcyB3aWxsIHRyaWdnZXIgbm90aWZpZXIgY2FsbCBh bmQgdGhlIGltcG9ydGluZyBkZXZpY2Ugd2lsbCBpbnZhbGlkYXRlCml0cyBtYXBwaW5nLiBPbmNl IGl0IGlzIGludmFsaWRhdGVkIHRoZW4gdGhlIGV4cG9ydGluZyBkZXZpY2UgY2FuCnBvaW50IG5l dyBjYWxsIG9mIHAycF9tYXAgKGZvciB0aGUgc2FtZSByYW5nZSkgdG8gbmV3IG1lbW9yeSAob2J2 aW91c2x5CnRoZSBleHBvcnRpbmcgZGV2aWNlIGhhdmUgdG8gc3luY2hyb25pemUgYW55IGNvbmN1 cnJlbnQgY2FsbCB0byBwMnBfbWFwCndpdGggdGhlIGludmFsaWRhdGlvbikuCgo+IAo+IEkgd291 bGQgdGhpbmsgdGhhdCB0aGUgaW1wb3J0aW5nIGRyaXZlciBjYW4gYXNzdW1lIHRoZSBCQVIgcGFn ZSBpcwo+IGtlcHQgYWxpdmUgdW50aWwgaXQgY2FsbHMgdW5tYXAgKHByZXN1bWFibHkgdHJpZ2dl cmVkIGJ5IG5vdGlmaWVycyk/Cj4gCj4gaWUgdGhlIGV4cG9ydGluZyBkcml2ZXIgc2VlcyB0aGUg QkFSIHBhZ2UgYXMgcGlubmVkIHVudGlsIHVubWFwLgoKVGhlIGludGVudGlvbiB3aXRoIHRoaXMg cGF0Y2hzZXQgaXMgdGhhdCBpdCBpcyBub3QgcGluIGllIHRoZSBpbXBvcnRlcgpkZXZpY2UgX211 c3RfIGFiaWRlIGJ5IGFsbCBtbXUgbm90aWZpZXIgaW52YWxpZGF0aW9ucyBhbmQgdGhleSBjYW4K aGFwcGVuIGF0IGFueXRpbWUuIFRoZSBpbXBvcnRpbmcgZGV2aWNlIGNhbiBob3dldmVyIHJlLXAy cF9tYXAgdGhlCnNhbWUgcmFuZ2UgYWZ0ZXIgYW4gaW52YWxpZGF0aW9uLgoKSSB3b3VsZCBsaWtl IHRvIHJlc3RyaWN0IHRoaXMgdG8gaW1wb3J0ZXIgdGhhdCBjYW4gaW52YWxpZGF0ZSBmb3IKbm93 IGJlY2F1c2UgaSBiZWxpZXZlIGFsbCB0aGUgZmlyc3QgZGV2aWNlIHRvIHVzZSBjYW4gc3VwcG9y dCB0aGUKaW52YWxpZGF0aW9uLgoKQWxzbyB3aGVuIHVzaW5nIEhNTSBwcml2YXRlIGRldmljZSBt ZW1vcnkgd2UgX2NhbiBub3RfIHBpbiB2aXJ0dWFsCmFkZHJlc3MgdG8gZGV2aWNlIG1lbW9yeSBh cyBvdGhlcndpc2UgQ1BVIGFjY2VzcyB3b3VsZCBoYXZlIHRvIFNJR0JVUwpvciBTRUdGQVVMVCBh bmQgd2UgZG8gbm90IHdhbnQgdGhhdC4gU28gdGhpcyB3YXMgYWxzbyBhIG1vdGl2YXRpb24gdG8K a2VlcCB0aGluZyBjb25zaXN0ZW50IGZvciB0aGUgaW1wb3J0ZXIgZm9yIGJvdGggY2FzZXMuCgpD aGVlcnMsCkrDqXLDtG1lCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9w Lm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1k ZXZlbAo=