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[109.252.170.211]) by smtp.googlemail.com with ESMTPSA id l3sm243635lfc.34.2020.09.30.09.25.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Sep 2020 09:25:42 -0700 (PDT) Subject: Re: [PATCH v3 2/3] iommu/tegra-smmu: Rework .probe_device and .attach_dev To: Thierry Reding References: <20200930084258.25493-1-nicoleotsuka@gmail.com> <20200930084258.25493-3-nicoleotsuka@gmail.com> <20200930153131.GB3833404@ulmo> <20200930160626.GD3833404@ulmo> From: Dmitry Osipenko Message-ID: Date: Wed, 30 Sep 2020 19:25:41 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200930160626.GD3833404@ulmo> Content-Language: en-US Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, krzk@kernel.org, jonathanh@nvidia.com, linux-tegra@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" MzAuMDkuMjAyMCAxOTowNiwgVGhpZXJyeSBSZWRpbmcg0L/QuNGI0LXRgjoKPiBPbiBXZWQsIFNl cCAzMCwgMjAyMCBhdCAwNjozNjo1MlBNICswMzAwLCBEbWl0cnkgT3NpcGVua28gd3JvdGU6Cj4+ ICBJJy4uLgo+Pj4+ICsJc3RydWN0IHRlZ3JhX21jICptYyA9IGRldm1fdGVncmFfZ2V0X21lbW9y eV9jb250cm9sbGVyKGRldik7Cj4+Pj4gKwlzdHJ1Y3QgaW9tbXVfZndzcGVjICpmd3NwZWMgPSBk ZXZfaW9tbXVfZndzcGVjX2dldChkZXYpOwo+Pj4KPj4+IEl0IGxvb2tzIHRvIG1lIGxpa2UgdGhl IG9ubHkgcmVhc29uIHdoeSB5b3UgbmVlZCB0aGlzIG5ldyBnbG9iYWwgQVBJIGlzCj4+PiBiZWNh dXNlIFBDSSBkZXZpY2VzIG1heSBub3QgaGF2ZSBhIGRldmljZSB0cmVlIG5vZGUgd2l0aCBhIHBo YW5kbGUgdG8KPj4+IHRoZSBJT01NVS4gSG93ZXZlciwgU01NVSBzdXBwb3J0IGZvciBQQ0kgd2ls bCBvbmx5IGJlIGVuYWJsZWQgaWYgdGhlCj4+PiByb290IGNvbXBsZXggaGFzIGFuIGlvbW11cyBw cm9wZXJ0eSwgcmlnaHQ/IEluIHRoYXQgY2FzZSwgY2FuJ3Qgd2UKPj4+IHNpbXBseSBkbyBzb21l dGhpbmcgbGlrZSB0aGlzOgo+Pj4KPj4+IAlpZiAoZGV2X2lzX3BjaShkZXYpKQo+Pj4gCQlucCA9 IGZpbmRfaG9zdF9icmlkZ2UoZGV2KS0+b2Zfbm9kZTsKPj4+IAllbHNlCj4+PiAJCW5wID0gZGV2 LT5vZl9ub2RlOwo+Pj4KPj4+ID8gSSdtIG5vdCBzdXJlIGV4YWN0bHkgd2hhdCBmaW5kX2hvc3Rf YnJpZGdlKCkgaXMgY2FsbGVkLCBidXQgSSdtIHByZXR0eQo+Pj4gc3VyZSB0aGF0IGV4aXN0cy4K Pj4+Cj4+PiBPbmNlIHdlIGhhdmUgdGhhdCB3ZSBjYW4gc3RpbGwgaXRlcmF0ZSBvdmVyIHRoZSBp b21tdXMgcHJvcGVydHkgYW5kIGRvCj4+PiBub3QgbmVlZCB0byByZWx5IG9uIHRoaXMgZ2xvYmFs IHZhcmlhYmxlLgo+Pgo+PiBUaGlzIHNvdW5kcyBtb3JlIGNvbXBsaWNhdGVkIHRoYW4gdGhlIGN1 cnJlbnQgdmFyaWFudC4KPj4KPj4gU2Vjb25kbHksIEknbSBhbHJlYWR5IGFib3V0IHRvIHVzZSB0 aGUgbmV3IHRlZ3JhX2dldF9tZW1vcnlfY29udHJvbGxlcigpCj4+IEFQSSBmb3IgYWxsIHRoZSBU MjAvMzAvMTI0LzIxMCBFTUMgYW5kIGRldmZyZXEgZHJpdmVycy4KPiAKPiBXaHkgZG8gd2UgbmVl ZCBpdCB0aGVyZT8gVGhleSBzZWVtIHRvIHdvcmsgZmluZSB3aXRob3V0IGl0IHJpZ2h0IG5vdy4K CkFsbCB0aGUgVGVncmEzMC8xMjQvMjEwIEVNQyBkcml2ZXJzIGFyZSBhbHJlYWR5IGR1cGxpY2F0 aW5nIHRoYXQgTUMKbG9va3VwIGNvZGUgYW5kIG9ubHkgdGhlIHJlY2VudCBUMjEwIGRyaXZlciBk b2VzIGl0IHByb3Blcmx5LgoKPiBJZiBpdCBpcyByZXF1aXJlZCBmb3IgbmV3IGZ1bmN0aW9uYWxp dHksIHdlIGNhbiBhbHdheXMgbWFrZSB0aGUgZGVwZW5kZW50Cj4gb24gYSBEVCByZWZlcmVuY2Ug dmlhIHBoYW5kbGUgd2l0aG91dCBicmVha2luZyBhbnkgZXhpc3RpbmcgY29kZS4KClRoYXQncyBj b3JyZWN0LCBpdCB3aWxsIGJlIGFsc28gbmVlZGVkIGZvciB0aGUgbmV3IGZ1bmN0aW9uYWxpdHkg YXMKd2VsbCwgaGVuY2UgZXZlbiBtb3JlIGRyaXZlcnMgd2lsbCBuZWVkIHRvIHBlcmZvcm0gdGhl IE1DIGxvb2t1cC4KCkkgZG9uJ3QgcXVpdGUgdW5kZXJzdGFuZCB3aHkgeW91J3JlIGFza2luZyBm b3IgdGhlIHBoYW5kbGUgcmVmZXJlbmNlLAppdCdzIGFic29sdXRlbHkgbm90IG5lZWRlZCBmb3Ig dGhlIE1DIGxvb2t1cCBhbmQgd29uJ3Qgd29yayBmb3IgdGhlCm9sZGVyIERUcyBpZiBEVCBjaGFu Z2Ugd2lsbCBiZSBuZWVkZWQuIFBsZWFzZSBnaXZlIGEgZGV0YWlsZWQgZXhwbGFuYXRpb24uCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxp bmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxp bnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==