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Wed, 13 Dec 2023 01:05:28 -0800 (PST) Date: Wed, 13 Dec 2023 11:05:17 +0200 From: Pekka Paalanen To: Simon Ser Cc: Yong Wu , Rob Herring , Sumit Semwal , christian.koenig@amd.com, Matthias Brugger , dri-devel@lists.freedesktop.org, John Stultz , Krzysztof Kozlowski , Jeffrey Kardatzke , Benjamin Gaignard , Vijayanand Jitta , Nicolas Dufresne , jianjiao.zeng@mediatek.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, Conor Dooley , ckoenig.leichtzumerken@gmail.com, linaro-mm-sig@lists.linaro.org, linux-mediatek@lists.infradead.org, Joakim Bech , tjmercier@google.com, linux-arm-kernel@lists.infradead.org, AngeloGioacchino Del Regno , kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 0/7] dma-buf: heaps: Add secure heap Message-ID: <20231213110517.6ce36aca@eldfell> In-Reply-To: References: <20231212024607.3681-1-yong.wu@mediatek.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/DaWmOigQ7D9ggi2.WnkRpp3"; protocol="application/pgp-signature"; micalg=pgp-sha256 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231213_010535_970683_15ED5A1C X-CRM114-Status: GOOD ( 14.47 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org --Sig_/DaWmOigQ7D9ggi2.WnkRpp3 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 12 Dec 2023 16:36:35 +0000 Simon Ser wrote: > Is there a chance to pick a better name than "secure" here? >=20 > "Secure" is super overloaded, it's not clear at all what it means from > just the name. Something like "restricted" would be an improvement. >=20 My thoughts exactly. Every time I see "secure" used for something that either gives you garbage, refuses to work, or crashes your whole machine *intentionally* when you try to do normal usual things to it in userspace (like use it for GL texturing, or try to use KMS writeback), I get an unscratchable itch. There is nothing "secure" from security perspective there for end users and developers. It's just inaccessible buffers. I've been biting my lip until now, thinking it's too late. 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Wed, 13 Dec 2023 01:05:28 -0800 (PST) Date: Wed, 13 Dec 2023 11:05:17 +0200 From: Pekka Paalanen To: Simon Ser Cc: Yong Wu , Rob Herring , Sumit Semwal , christian.koenig@amd.com, Matthias Brugger , dri-devel@lists.freedesktop.org, John Stultz , Krzysztof Kozlowski , Jeffrey Kardatzke , Benjamin Gaignard , Vijayanand Jitta , Nicolas Dufresne , jianjiao.zeng@mediatek.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, Conor Dooley , ckoenig.leichtzumerken@gmail.com, linaro-mm-sig@lists.linaro.org, linux-mediatek@lists.infradead.org, Joakim Bech , tjmercier@google.com, linux-arm-kernel@lists.infradead.org, AngeloGioacchino Del Regno , kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 0/7] dma-buf: heaps: Add secure heap Message-ID: <20231213110517.6ce36aca@eldfell> In-Reply-To: References: <20231212024607.3681-1-yong.wu@mediatek.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231213_010535_970683_15ED5A1C X-CRM114-Status: GOOD ( 14.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8469844657149151208==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============8469844657149151208== Content-Type: multipart/signed; boundary="Sig_/DaWmOigQ7D9ggi2.WnkRpp3"; protocol="application/pgp-signature"; micalg=pgp-sha256 --Sig_/DaWmOigQ7D9ggi2.WnkRpp3 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 12 Dec 2023 16:36:35 +0000 Simon Ser wrote: > Is there a chance to pick a better name than "secure" here? >=20 > "Secure" is super overloaded, it's not clear at all what it means from > just the name. Something like "restricted" would be an improvement. >=20 My thoughts exactly. Every time I see "secure" used for something that either gives you garbage, refuses to work, or crashes your whole machine *intentionally* when you try to do normal usual things to it in userspace (like use it for GL texturing, or try to use KMS writeback), I get an unscratchable itch. There is nothing "secure" from security perspective there for end users and developers. It's just inaccessible buffers. I've been biting my lip until now, thinking it's too late. Thanks, pq --Sig_/DaWmOigQ7D9ggi2.WnkRpp3 Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEJQjwWQChkWOYOIONI1/ltBGqqqcFAmV5c80ACgkQI1/ltBGq qqdqdg/8DMTwQfWf/EfE0E0FOjM0IPMnzZreMPcRlHBqMJqgQA5miVL9CVE+novh ohRbfFYLwut7eqtK6Dzn+6hOIVFRMpGPkWe8qHfT+CJ8Wr3hD8Q23PKEveH/FENO G+XUbPzsnlDTDs5MB2Bb1TAiWQLS8Y1/nstMZ49l8mmW6Iim0Z+/xhyqUyLaHfpm zB7JRM7CSN8gyPhoqoAAITy+ZL4+yD7D28izgQA4YZD4JzkE1fYOUFzNb4QRA/T7 GxPSExZlU7+CdIL5zAJvhqpHh9nxMdOUvaP3aQBzShcTKDVoet/TZ+0QuEOuD1QJ gHG05Hcp5gREsbjn9oytS2km0LcL7ZmR98NOrf9idl4jZDjVTEMQvV/FrSSwiyGv 5whtFHkkDVy1nXjyYmgiGO7dvIptO+dNGgRtACt3xe0tdvu5ndP2+hG21ADVWebc fd2T4mnUoANro1gOjWATV5+0fzlOK5hFff70pvE9U2ATvqXo7i2I+kzW/EJFPilA 4EqR7cIyLCaVRb7q/dC4CdWUu0NIxCp7+u22Z/B8pHFw2MnQZa0twIKV3GJokfrR A4PfZLAvpbSkfr7SalrN6eYFHhJOpcCJPHXCiQSnRT7DU5u6NhUr35IZgq/YuANC YrU/v7fiWv2v6I0I2FN8fBaH1baL6/SWpA5q43OECPVewbA/Uwg= =DQfN -----END PGP SIGNATURE----- --Sig_/DaWmOigQ7D9ggi2.WnkRpp3-- --===============8469844657149151208== Content-Type: text/plain; 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x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/DaWmOigQ7D9ggi2.WnkRpp3"; protocol="application/pgp-signature"; micalg=pgp-sha256 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dri-devel@lists.freedesktop.org, John Stultz , Krzysztof Kozlowski , Sumit Semwal , Jeffrey Kardatzke , Benjamin Gaignard , Vijayanand Jitta , Nicolas Dufresne , Yong Wu , jianjiao.zeng@mediatek.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, Conor Dooley , ckoenig.leichtzumerken@gmail.com, linaro-mm-sig@lists.linaro.org, Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , Joakim Bech , tjmercier@google.com, linux-arm-kernel@lists.infradead.org, AngeloGioacchino Del Regno , kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, christian.koenig@amd.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" --Sig_/DaWmOigQ7D9ggi2.WnkRpp3 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 12 Dec 2023 16:36:35 +0000 Simon Ser wrote: > Is there a chance to pick a better name than "secure" here? >=20 > "Secure" is super overloaded, it's not clear at all what it means from > just the name. Something like "restricted" would be an improvement. >=20 My thoughts exactly. Every time I see "secure" used for something that either gives you garbage, refuses to work, or crashes your whole machine *intentionally* when you try to do normal usual things to it in userspace (like use it for GL texturing, or try to use KMS writeback), I get an unscratchable itch. There is nothing "secure" from security perspective there for end users and developers. It's just inaccessible buffers. I've been biting my lip until now, thinking it's too late. 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