From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yong Wu Subject: Re: [RFC PATCH 0/5] arm64: IOMMU-backed DMA mapping Date: Fri, 16 Jan 2015 15:21:32 +0800 Message-ID: <1421392892.19175.6.camel@mhfsdcap03> References: <1421136128.27675.58.camel@mtksdaap41> <54B80857.7060407@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <54B80857.7060407@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Robin Murphy Cc: "linux@arm.linux.org.uk" , "sakari.ailus@linux.intel.com" , "arnd@arndb.de" , "stefano.stabellini@eu.citrix.com" , Catalin Marinas , "joro@8bytes.org" , "thunder.leizhen@huawei.com" , Will Deacon , "lauraa@codeaurora.org" , "iommu@lists.linux-foundation.org" , "suravee.suthikulpanit@amd.com" , "ritesh.harjani@gmail.com" , Yingjoe Chen , "eddie.huang@mediatek.com" , "dwmw2@infradead.org" , "linux-arm-kernel@lists.infradead.org" , "yh.chen@mediatek.com" List-Id: iommu@lists.linux-foundation.org T24gVGh1LCAyMDE1LTAxLTE1IGF0IDE4OjM1ICswMDAwLCBSb2JpbiBNdXJwaHkgd3JvdGU6Cj4g T24gMTMvMDEvMTUgMDg6MDIsIFlpbmdqb2UgQ2hlbiB3cm90ZToKPiA+IE9uIE1vbiwgMjAxNS0w MS0xMiBhdCAyMDo0OCArMDAwMCwgUm9iaW4gTXVycGh5IHdyb3RlOgo+ID4+IEhpIGFsbCwKPiA+ Pgo+ID4+IFdoaWxzdCBpdCdzIGEgbG9uZyB3YXkgb2ZmIHBlcmZlY3QsIHRoaXMgaGFzIHJlYWNo ZWQgdGhlIHBvaW50IG9mIGJlaW5nCj4gPj4gZnVuY3Rpb25hbCBhbmQgc3RhYmxlIGVub3VnaCB0 byBiZSB1c2VmdWwsIHNvIGhlcmUgaXQgaXMuIFRoZSBjb3JlCj4gPj4gY29uc2lzdHMgb2YgdGhl IG1lYXQgb2YgdGhlIGFyY2gvYXJtIGltcGxlbWVudGF0aW9uIG1vZGlmaWVkIHRvIHJlbW92ZQo+ ID4+IHRoZSBhc3N1bXB0aW9uIG9mIFBBR0VfU0laRSBwYWdlcyBhbmQgcG9ydGVkIG92ZXIgdG8g dGhlIEludGVsIElPVkEKPiA+PiBhbGxvY2F0b3IgaW5zdGVhZCBvZiB0aGUgYml0bWFwLWJhc2Vk IG9uZS4gRm9yIHRoYXQsIHRoaXMgc2VyaWVzIGRlcGVuZHMKPiA+PiBvbiBteSAiR2VuZXJpY2lz ZSB0aGUgSU9WQSBhbGxvY2F0b3IiIHNlcmllcyBwb3N0ZWQgZWFybGllclsxXS4KPiA+Cj4gPiBI aSBSb2JpbiwKPiA+Cj4gPiBXZSdkIHRvIGdpdmUgaXQgYSB0cnkuIERvIHlvdSBoYXZlIGEgcHVi bGljIGdpdCB0cmVlIGNvbnRhaW5zIGJvdGgKPiA+IHNlcmllcz8KPiA+Cj4gPiBKb2UuQwo+IAo+ IE5vdyB0aGF0IHRoZSBzZXJ2ZXIgc2VlbXMgdG8gYmUgcHJvcGVybHkgYWNjZXNzaWJsZSBhZ2Fp biwgSSd2ZSBtYWRlIGEgCj4gYnJhbmNoIHdpdGggYm90aCBzZXJpZXMgYXZhaWxhYmxlIGhlcmU6 Cj4gCj4gICAgZ2l0Oi8vbGludXgtYXJtLm9yZy9saW51eC1ybSBpb21tdS9kbWEKPiAKPiBOb3Rl IHRoYXQgaW4gdGhlIGN1cnJlbnQgc3RhdGUgaXQgYWxzbyBkZXBlbmRzIG9uIGhhdmluZyB0aGUg QVJNIFNNTVUgCj4gZHJpdmVyIHNlbGVjdGVkIGluIHRoZSBjb25maWcsIGR1ZSB0byBhbiBvdmVy c2lnaHQgb24gbXkgcGFydCA6KAo+IAo+IFJvYmluLgo+IApEZWFyIFJvYmluLAoKICAgICBXZSBo YXZlIHRlc3QgdGhpcyBwYXRjaCBvbiBvdXIgU09DKG10ODE3Myksd2hpY2ggaGF2ZSBvdXIgb3du IGlvbW11CkhXKGl0IGlzIG5vdCBBUk0gU01NVSksIHRoZSBwYXRjaCBjb3VsZCB3b3JrIHdlbGwu ClRlc3RlZC1ieTpZb25nIFd1IDx5b25nLnd1QG1lZGlhdGVrLmNvbT4KCiBBbmQgSSBoYXZlIHNv bWUgcXVlc3Rpb25lcyBhYm91dCB0aGUgdXNhZ2U6CgoxKSBJZiB3ZSBjcmVhdGUgYSBpb21tdSBk b21haW4gYnkg4oCcYXJjaF9zZXR1cF9kbWFfb3BzIiwgdGhlbiB3ZSB3b3VsZApsaWtlIHRvIGNh bGwgdGhlIHN0YW5kYXJkIGlvbW11IGludGVyZmFjZSwgbGlrZQrigJxpb21tdV9zZXRfZmF1bHRf aGFuZGxl4oCdLApIb3cgY2FuIHdlIGdldCB0aGUgInN0cnVjdCBpb21tdV9kb21haW4gKiI/ICh0 aGUg4oCcZGV2X2RvbWFpbuKAnSBpcwpzdGF0aWMuKQoKMikgSWYgYSBkZXZpY2UgQSBjYWxsIOKA nGFyY2hfc2V0dXBfZG1hX29wc+KAnSB0byBjcmVhdGUgYSBpb21tdSBkb21haW4sIGFuZAphIGNs aWVudCBkZXZpY2UgQiB3b3VsZCBsaWtlIHRvIGpvaW4gdGhpcyBpb21tdSBkb21haW4sIApzbyBp dCBjYWxsIOKAnGlvbW11X2RtYV9hdHRhY2hfZGV2aWNl4oCdLiB0aGVuIHRoZSBkZXZpY2UgQiB3 YW50IHRvIGFsbG9jCnRoZSBpb21tdSBtZW1vcnksIGl0IGNhbGwg4oCcZG1hX2FsbG9jX2F0dHJz 4oCdIHdob3NlIGZpcnN0IHBhcmFtZXRlciBzaG91bGQKYmUgdGhlIOKAnHN0cnVjdCBkZXZpY2Ug KuKAnW9mIGRldmljZSBBLiBJcyBpdCBkZXNpZ25lZCBsaWtlIHRoaXMgaW4gdGhpcwpwYXRjaD8K ICAgIChJbiBhcmNoL2FybSwg4oCcZGV2LT5hcmNoZGF0YS5kbWFfb3BzID0gJmlvbW11X2RtYV9v cHPigJ0gaXMgaW4K4oCcYXJtX2lvbW11X2F0dGFjaF9kZXZjZeKAnTsKICAgICBJbiB0aGlzIHBh dGNoLCB0aGlzIHNlbnRlbmNlIGlzIGluIOKAnGFyY2hfc2V0dXBfZG1hX29wc+KAnSkuCgozKSAg dm9pZCBhcmNoX3NldHVwX2RtYV9vcHMoc3RydWN0IGRldmljZSAqZGV2LCB1NjQgZG1hX2Jhc2Us IHU2NCBzaXplLApzdHJ1Y3QgaW9tbXVfb3BzICppb21tdSwgYm9vbCBjb2hlcmVudCkKICAgIElu IHRoaXMgZnVuY3Rpb24sIHRoZSBzZWNvbmQgYW5kIHRoaXJkIHBhcmFtZXRlciBhcmUgdGhlIGRt YSBhZGRyZXNzCmJhc2UgYW5kIHNpemUsIGNhbiB0aGV5IHdvcmsgY3VycmVudGx5PwoodGFrZSBh IGV4YW1wbGUsIEkgc2V0IHRoZSBkbWFfYmFzZSBpcyAwLCBzaXplIGlzIDB4NDAwMDAwMDAgd2hp bGUKY2FsbGluZyBhcmNoX3NldHVwX2RtYV9vcHMsIAogdGhlbiBJIGFsbG9jIGEgcmFuZ2UgaW92 YSB3aG9zZSBzaXplIGlzIDUwKlNaXzRLLCB0aGUgcmV0dXJuIGlvdmEgaXMKMHhmZmZjZTAwMCwg aXQgaXMgb3ZlciAweDQwMDAwMDAwLikKCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJt LWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21h aWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=