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[109.252.193.103]) by smtp.googlemail.com with ESMTPSA id z18sm17325lft.57.2021.04.24.13.41.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 24 Apr 2021 13:41:38 -0700 (PDT) Subject: Re: [PATCH v1 2/2] iommu/tegra-smmu: Revert workaround that was needed for Nyan Big Chromebook From: Dmitry Osipenko To: Guillaume Tucker , Nicolin Chen , Thierry Reding References: <20210328233256.20494-1-digetx@gmail.com> <20210328233256.20494-2-digetx@gmail.com> <20210401085549.GA31146@Asurada-Nvidia> <50a7e4c7-0e72-534a-a317-366e455213c1@gmail.com> <724e683f-5317-cdf7-7351-fcfd42b7b607@gmail.com> <5ec2be61-a70e-e3b1-9267-414793c32a04@gmail.com> Message-ID: <4b1eb3d5-6489-6553-ba88-df485323e6e8@gmail.com> Date: Sat, 24 Apr 2021 23:41:37 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <5ec2be61-a70e-e3b1-9267-414793c32a04@gmail.com> Content-Language: en-US Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Jonathan Hunter , linux-tegra@vger.kernel.org, Will Deacon 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" MjQuMDQuMjAyMSAyMzoyNywgRG1pdHJ5IE9zaXBlbmtvINC/0LjRiNC10YI6Cj4gMjMuMDQuMjAy MSAxODoyMywgRG1pdHJ5IE9zaXBlbmtvINC/0LjRiNC10YI6Cj4+IDIzLjA0LjIwMjEgMTg6MDEs IEd1aWxsYXVtZSBUdWNrZXIg0L/QuNGI0LXRgjoKPj4+IE9uIDAyLzA0LzIwMjEgMTU6NDAsIERt aXRyeSBPc2lwZW5rbyB3cm90ZToKPj4+PiAwMS4wNC4yMDIxIDExOjU1LCBOaWNvbGluIENoZW4g 0L/QuNGI0LXRgjoKPj4+Pj4gT24gTW9uLCBNYXIgMjksIDIwMjEgYXQgMDI6MzI6NTZBTSArMDMw MCwgRG1pdHJ5IE9zaXBlbmtvIHdyb3RlOgo+Pj4+Pj4gVGhlIHByZXZpb3VzIGNvbW1pdCBmaXhl cyBwcm9ibGVtIHdoZXJlIGRpc3BsYXkgY2xpZW50IHdhcyBhdHRhY2hpbmcgdG9vCj4+Pj4+PiBl YXJseSB0byBJT01NVSBkdXJpbmcga2VybmVsIGJvb3QgaW4gYSBtdWx0aS1wbGF0Zm9ybSBrZXJu ZWwgY29uZmlndXJhdGlvbgo+Pj4+Pj4gd2hpY2ggZW5hYmxlcyBDT05GSUdfQVJNX0RNQV9VU0Vf SU9NTVU9eS4gVGhlIHdvcmthcm91bmQgdGhhdCBoZWxwZWQgdG8KPj4+Pj4+IGRlZmVyIHRoZSBJ T01NVSBhdHRhY2htZW50IGZvciBOeWFuIEJpZyBDaHJvbWVib29rIGlzbid0IG5lZWRlZCBhbnlt b3JlLAo+Pj4+Pj4gcmV2ZXJ0IGl0Lgo+Pj4+Pgo+Pj4+PiBTb3JyeSBmb3IgdGhlIGxhdGUgcmVw bHkuIEkgaGF2ZSBiZWVuIGJ1c3kgd2l0aCBkb3duc3RyZWFtIHRhc2tzLgo+Pj4+Pgo+Pj4+PiBJ IHdpbGwgZ2l2ZSB0aGVtIGEgdHJ5IGJ5IHRoZSBlbmQgb2YgdGhlIHdlZWsuIFlldCwgcHJvYmFi bHkgaXQnZAo+Pj4+PiBiZSBiZXR0ZXIgdG8gaW5jbHVkZSBHdWlsbGF1bWUgYWxzbyBhcyBoZSBo YXMgdGhlIE55YW4gcGxhdGZvcm0uCj4+Pj4+Cj4+Pj4KPj4+PiBJbmRlZWQsIHRoYW5rcy4gQWx0 aG91Z2gsIEknbSBwcmV0dHkgc3VyZSB0aGF0IGl0J3MgdGhlIHNhbWUgaXNzdWUgd2hpY2gKPj4+ PiBJIHJlcHJvZHVjZWQgb24gTmV4dXMgNy4KPj4+Pgo+Pj4+IEd1aWxsYXVtZSwgY291bGQgeW91 IHBsZWFzZSBnaXZlIGEgdGVzdCB0byB0aGVzZSBwYXRjaGVzIG9uIE55YW4gQmlnPwo+Pj4+IFRo ZXJlIHNob3VsZCBiZSBubyBFTUVNIGVycm9ycyBpbiB0aGUga2VybmVsIGxvZyB3aXRoIHRoaXMg cGF0Y2hlcy4KPj4+Pgo+Pj4+IGh0dHBzOi8vcGF0Y2h3b3JrLm96bGFicy5vcmcvcHJvamVjdC9s aW51eC10ZWdyYS9saXN0Lz9zZXJpZXM9MjM2MjE1Cj4+Pgo+Pj4gU28gc29ycnkgZm9yIHRoZSB2 ZXJ5IGxhdGUgcmVwbHkuICBJIGhhdmUgdHJpZWQgdGhlIHBhdGNoZXMgYnV0Cj4+PiBoaXQgc29t ZSBpc3N1ZXMgb24gbGludXgtbmV4dCwgaXQncyBub3QgcmVhY2hpbmcgYSBsb2dpbiBwcm9tcHQK Pj4+IHdpdGggbmV4dC0yMDIxMDQyMi4gIFNvIEkgdGhlbiB0cmllZCB3aXRoIG5leHQtMjAyMTA0 MTkgd2hpY2gKPj4+IGRvZXMgYm9vdCBidXQgc2hvd3MgdGhlIElPTU1VIGVycm9yOgo+Pj4KPj4+ IDw2PlsgICAgMi45OTUzNDFdIHRlZ3JhLWRjIDU0MjAwMDAwLmRjOiBBZGRpbmcgdG8gaW9tbXUg Z3JvdXAgMQo+Pj4gPDQ+WyAgICAzLjAwMTA3MF0gRmFpbGVkIHRvIGF0dGFjaGVkIGRldmljZSA1 NDIwMDAwMC5kYyB0byBJT01NVV9tYXBwaW5nICAKPj4+Cj4+PiAgIGh0dHBzOi8vbGF2YS5jb2xs YWJvcmEuY28udWsvc2NoZWR1bGVyL2pvYi8zNTcwMDUyI0wxMTIwCj4+Pgo+Pj4gVGhlIGJyYW5j aCBJJ20gdXNpbmcgd2l0aCB0aGUgcGF0Y2hlcyBhcHBsaWVkIGNhbiBiZSBmb3VuZCBoZXJlOgo+ Pj4KPj4+ICAgaHR0cHM6Ly9naXRsYWIuY29sbGFib3JhLmNvbS9ndHVja2VyL2xpbnV4Ly0vY29t bWl0cy9uZXh0LTIwMjEwNDE5LW55YW4tYmlnLWRybS1yZWFkLwo+Pj4KPj4+IEhvcGUgdGhpcyBo ZWxwcywgbGV0IG1lIGtub3cgaWYgeW91IG5lZWQgYW55dGhpbmcgZWxzZSB0byBiZQo+Pj4gdGVz dGVkLgo+Pgo+Pgo+PiBIZWxsbyBHdWlsbGF1bWUsCj4+Cj4+IFRoZSBjdXJyZW50IGxpbnV4LW5l eHQgZG9lc24ndCBib290IG9uIGFsbCBBUk0gKEFGQUlLKSwgdGhlIG9sZGVyCj4+IG5leHQtMjAy MTA0MTMgd29ya3MuIFRoZSBhYm92ZSBtZXNzYWdlIHNob3VsZCBiZSB1bnJlbGF0ZWQgdG8gdGhl IGJvb3QKPj4gcHJvYmxlbS4gSXQgc2hvdWxkIGJlIG9rYXkgdG8gaWdub3JlIHRoYXQgbWVzc2Fn ZSBhcyBpdCBzaG91bGQgYmUKPj4gaGFybWxlc3MgaW4geW91cnMgY2FzZS4KPj4KPiAKPiBBbHRo b3VnaCwgdGhlIDIwMjEwNDE5IHNob3VsZCBiZSBnb29kLgo+IAo+IFRoaWVycnksIGRvIHlvdSBr bm93IHdoYXQgdGhvc2UgU09SIGFuZCBOb3V2ZWF1IGlzc3VlcyBhcmUgYWJvdXQ/Cj4gCgpJIGRv bid0IHNlZSBEUk0gZHJpdmVyIGJlaW5nIGxvYWRlZCBhdCBhbGwgYW5kIG5vIGVycm9ycyByZWxh dGVkIHRvIGl0CmluIHRoZSBsb2cuIFRoaXMgbWVhbnMgdGhhdCBsaWtlbHkgc29tZSBvZiB0aGUg RFJNIHN1Yi1kcml2ZXJzIGlzIHN0dWNrCmluIGRlZmVycmVkIHByb2JlLgoKR3VpbGxhdW1lLCBj b3VsZCB5b3UgcGxlYXNlIHNob3cgY29udGVudHMgb2YKL3N5cy9rZXJuZWwvZGVidWcvZGV2aWNl c19kZWZlcnJlZCA/CgpUaGVzZSBtZXNzYWdlcyBhbHNvIGRvbid0IGxvb2sgZ29vZDoKCnRlZ3Jh LXh1c2ItcGFkY3RsIDcwMDlmMDAwLnBhZGN0bDogZmFpbGVkIHRvIHNldHVwIFhVU0IgcG9ydHM6 IC0yMgp0ZWdyYS14dXNiLXBhZGN0bDogcHJvYmUgb2YgNzAwOWYwMDAucGFkY3RsIGZhaWxlZCB3 aXRoIGVycm9yIC0yMgoKSSBkb24ndCBoYXZlIFQxMjQgYW5kIGFsbCB0aGVzZSBwcm9ibGVtcyBz aG91bGQgYmUgc3BlY2lmaWMgdG8gdGhlIFQxMjQKcGxhdGZvcm0uIFNvbWVib2R5IHdpdGggYSBk aXJlY3QgYWNjZXNzIHRvIGhhcmR3YXJlIHNob3VsZCBsb29rIGludG8gaXQuCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdApp b21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRh dGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==