From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Osipenko Subject: Re: [RFC PATCH v1 0/6] Resolve unwanted DMA backing with IOMMU Date: Fri, 27 Jul 2018 17:10:22 +0300 Message-ID: <4164951.xGHfcFJ9uZ@dimapc> References: <20180726231624.21084-1-digetx@gmail.com> <20180727082512.lpvmeuvxnw3mpeym@8bytes.org> <20180727090328.GH28088@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20180727090328.GH28088-5wv7dgnIgG8@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "Nouveau" To: Will Deacon , Joerg Roedel Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "Rafael J. Wysocki" , Greg Kroah-Hartman , dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, Russell King , Rob Herring , linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Thierry Reding , Ben Skeggs , Catalin Marinas , nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, Frank Rowand , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org T24gRnJpZGF5LCAyNyBKdWx5IDIwMTggMTI6MDM6MjggTVNLIFdpbGwgRGVhY29uIHdyb3RlOgo+ IE9uIEZyaSwgSnVsIDI3LCAyMDE4IGF0IDEwOjI1OjEzQU0gKzAyMDAsIEpvZXJnIFJvZWRlbCB3 cm90ZToKPiA+IE9uIEZyaSwgSnVsIDI3LCAyMDE4IGF0IDAyOjE2OjE4QU0gKzAzMDAsIERtaXRy eSBPc2lwZW5rbyB3cm90ZToKPiA+ID4gVGhlIHByb3Bvc2VkIHNvbHV0aW9uIGFkZHMgYSBuZXcg b3B0aW9uIHRvIHRoZSBiYXNlIGRldmljZSBkcml2ZXIKPiA+ID4gc3RydWN0dXJlIHRoYXQgYWxs b3dzIGRldmljZSBkcml2ZXJzIHRvIGV4cGxpY2l0bHkgY29udmV5IHRvIHRoZSBkcml2ZXJzCj4g PiA+IGNvcmUgdGhhdCB0aGUgaW1wbGljaXQgSU9NTVUgYmFja2luZyBmb3IgZGV2aWNlcyBtdXN0 IG5vdCBoYXBwZW4uCj4gPiAKPiA+IFdoeSBpcyBJT01NVSBtYXBwaW5nIGEgcHJvYmxlbSBmb3Ig dGhlIFRlZ3JhIEdQVSBkcml2ZXI/Cj4gPiAKPiA+IElmIHdlIGFkZCBzb21ldGhpbmcgbGlrZSB0 aGlzIHRoZW4gaXQgc2hvdWxkIG5vdCBiZSB0aGUgY2hvaWNlIG9mIHRoZQo+ID4gZGV2aWNlIGRy aXZlciwgYnV0IG9mIHRoZSB1c2VyIGFuZC9vciB0aGUgZmlybXdhcmUuCj4gCj4gQWdyZWVkLCBh bmQgaXQgd291bGQgc3RpbGwgbmVlZCBzb21lYm9keSB0byBjb25maWd1cmUgYW4gaWRlbnRpdHkg ZG9tYWluIHNvCj4gdGhhdCB0cmFuc2FjdGlvbnMgYXJlbid0IGFib3J0ZWQgaW1tZWRpYXRlbHku IFdlIGN1cnJlbnRseSBhbGxvdyB0aGUKPiBpZGVudGl0eSBkb21haW4gdG8gYmUgdXNlZCBieSBk ZWZhdWx0IHZpYSBhIGNvbW1hbmQtbGluZSBvcHRpb24sIHNvIEkgZ3Vlc3MKPiB3ZSdkIG5lZWQg YSB3YXkgZm9yIGZpcm13YXJlIHRvIHJlcXVlc3QgdGhhdCBvbiBhIHBlci1kZXZpY2UgYmFzaXMu CgpUaGUgSU9NTVUgbWFwcGluZyBpdHNlbGYgaXMgbm90IGEgcHJvYmxlbSwgdGhlIHByb2JsZW0g aXMgdGhlIG1hbmFnZW1lbnQgb2YgCnRoZSBJT01NVS4gRm9yIFRlZ3JhIHdlIGRvbid0IHdhbnQg YW55dGhpbmcgdG8gaW50cnVkZSBpbnRvIHRoZSBJT01NVSAKYWN0aXZpdGllcyBiZWNhdXNlOgoK MSkgR1BVIEhXIHJlcXVpcmUgYWRkaXRpb25hbCBjb25maWd1cmF0aW9uIGZvciB0aGUgSU9NTVUg dXNhZ2UgYW5kIGR1bWIgCm1hcHBpbmcgb2YgdGhlIGFsbG9jYXRpb25zIHNpbXBseSBkb2Vzbid0 IHdvcmsuCgoyKSBPbGRlciBUZWdyYSBnZW5lcmF0aW9ucyBoYXZlIGEgbGltaXRlZCByZXNvdXJj ZSBhbmQgY2FwYWJpbGl0aWVzIGluIHJlZ2FyZHMgCnRvIElPTU1VIHVzYWdlLCBhbGxvY2F0aW5n IElPTU1VIGRvbWFpbiBwZXItZGV2aWNlIGlzIGp1c3QgaW1wb3NzaWJsZSBmb3IgIApleGFtcGxl LgoKMykgSFcgcGVyZm9ybXMgY29udGV4dCBzd2l0Y2hlcyBhbmQgc28gcGFydGljdWxhciBhbGxv Y2F0aW9ucyBoYXZlIHRvIGJlIAphc3NpZ25lZCB0byBhIHBhcnRpY3VsYXIgY29udGV4dHMgSU9N TVUgZG9tYWluLgoKU29tZSBvZiB0aGUgYWJvdmUgaXMgZHVlIHRvIGEgU1cgZHJpdmVyIG1vZGVs IChhbmQgaXRzIHdvcmstaW4tcHJvZ3Jlc3MgCnN0YXR1cyksIG90aGVyIGlzIGR1ZSB0byBhIEhX IG1vZGVsLiBTbyBlc3NlbnRpYWxseSB3ZSBuZWVkIGEgd2F5IGZvciBhIGRyaXZlciAKdG8gdGVs bCB0aGUgY29yZSBub3QgdG8gbWVzcyB3aXRoIElPTU1VIHN0dWZmIG9mIGRyaXZlcnMgZGV2aWNl IGJlaGluZCB0aGUgCmRyaXZlcnMgYmFjay4KCkknbSBub3Qgc3VyZSB3aGF0IHlvdSBndXlzIGFy ZSBtZWFuaW5nIGJ5IHRoZSAiZmlybXdhcmUiLCBjb3VsZCB5b3UgZWxhYm9yYXRlIApwbGVhc2U/ IERvIHlvdSBtZWFuIHRoZSBPcGVuIEZpcm13YXJlIGFuZCBoZW5jZSB0aGUgZGV2aWNldHJlZSBv ciB3aGF0PwoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpOb3V2ZWF1IG1haWxpbmcgbGlzdApOb3V2ZWF1QGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRw czovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL25vdXZlYXUK