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charset="iso-8859-15" Content-ID: <4ABFF15485189A4C9207CD006FF5C4D6@eurprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB6743.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9310a809-3542-4fd6-f4ab-08da8060121a X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Aug 2022 14:52:13.5162 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: VIjMtbpP5cMdo5w+c/oLt7oHTGQfi+LyPsQqdja+ct6se+rajNSG6lCC17TYFnb4YkOReC6weRhyi36NKfMIgQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBAPR04MB7366 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org +Cyrille Hi Nicolas, On mer., 2022-08-17 at 10:29 -0400, Nicolas Dufresne wrote: > Caution: EXT Email >=20 > Hi Folks, >=20 > Le mardi 16 ao=FBt 2022 =E0 11:20 +0000, Olivier Masse a =E9crit : > > Hi Brian, > >=20 > >=20 > > On ven., 2022-08-12 at 17:39 +0100, Brian Starkey wrote: > > > Caution: EXT Ema > > >=20 >=20 > [...] >=20 > > >=20 > > > Interesting, that's not how the devices I've worked on operated. > > >=20 > > > Are you saying that you have to have a display controller driver > > > running in the TEE to display one of these buffers? > >=20 > > In fact the display controller is managing 3 plans : UI, PiP and > > video. The video plan is protected in secure as you can see on > > slide > > 11: > >=20 https://eur01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fstatic.= linaro.org%2Fconnect%2Fsan19%2Fpresentations%2Fsan19-107.pdf&data=3D05%= 7C01%7Colivier.masse%40nxp.com%7Ce0e00be789a54dff8e5208da805ce2f6%7C686ea1d= 3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637963433695707516%7CUnknown%7CTWFpbGZs= b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C30= 00%7C%7C%7C&sdata=3DGHjEfbgqRkfHK16oyNaYJob4LRVqvoffRElKR%2F7Rtes%3D&am= p;reserved=3D0 >=20 >=20 >=20 > just wanted to highlight that all the WPE/GStreamer bit in this > presentation is > based on NXP Vendor Media CODEC design, which rely on their own i.MX > VPU API. I > don't see any effort to extend this to a wider audience. It is not > explaining > how this can work with a mainline kernel with v4l2 stateful or > stateless drivers > and generic GStreamer/FFMPEG/Chromium support. Maybe Cyrille can explain what it is currently done at NXP level regarding the integration of v4l2 with NXP VPU. >=20 > I'm raising this, since I'm worried that no one cares of solving that > high level > problem from a generic point of view. In that context, any additions > to the > mainline Linux kernel can only be flawed and will only serves > specific vendors > and not the larger audience. >=20 > Another aspect, is that this design might be bound to a specific (NXP > ?) > security design. I've learn recently that newer HW is going to use > multiple > level of MMU (like virtual machines do) to protect the memory rather > then > marking pages. Will all this work for that too ? our fire-walling hardware is protecting memory behind the MMU and so rely on physical memory layout. this work is only relying on a reserved physical memory. 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charset="iso-8859-15" Content-ID: <4ABFF15485189A4C9207CD006FF5C4D6@eurprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB6743.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9310a809-3542-4fd6-f4ab-08da8060121a X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Aug 2022 14:52:13.5162 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: VIjMtbpP5cMdo5w+c/oLt7oHTGQfi+LyPsQqdja+ct6se+rajNSG6lCC17TYFnb4YkOReC6weRhyi36NKfMIgQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBAPR04MB7366 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: =?iso-8859-15?Q?Cl=E9ment_Faure?= , "benjamin.gaignard@collabora.com" , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "sumit.semwal@linaro.org" , "linaro-mm-sig@lists.linaro.org" , "nd@arm.com" , "christian.koenig@amd.com" , "linux-media@vger.kernel.org" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" +Cyrille Hi Nicolas, On mer., 2022-08-17 at 10:29 -0400, Nicolas Dufresne wrote: > Caution: EXT Email >=20 > Hi Folks, >=20 > Le mardi 16 ao=FBt 2022 =E0 11:20 +0000, Olivier Masse a =E9crit : > > Hi Brian, > >=20 > >=20 > > On ven., 2022-08-12 at 17:39 +0100, Brian Starkey wrote: > > > Caution: EXT Ema > > >=20 >=20 > [...] >=20 > > >=20 > > > Interesting, that's not how the devices I've worked on operated. > > >=20 > > > Are you saying that you have to have a display controller driver > > > running in the TEE to display one of these buffers? > >=20 > > In fact the display controller is managing 3 plans : UI, PiP and > > video. The video plan is protected in secure as you can see on > > slide > > 11: > >=20 https://eur01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fstatic.= linaro.org%2Fconnect%2Fsan19%2Fpresentations%2Fsan19-107.pdf&data=3D05%= 7C01%7Colivier.masse%40nxp.com%7Ce0e00be789a54dff8e5208da805ce2f6%7C686ea1d= 3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637963433695707516%7CUnknown%7CTWFpbGZs= b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C30= 00%7C%7C%7C&sdata=3DGHjEfbgqRkfHK16oyNaYJob4LRVqvoffRElKR%2F7Rtes%3D&am= p;reserved=3D0 >=20 >=20 >=20 > just wanted to highlight that all the WPE/GStreamer bit in this > presentation is > based on NXP Vendor Media CODEC design, which rely on their own i.MX > VPU API. I > don't see any effort to extend this to a wider audience. It is not > explaining > how this can work with a mainline kernel with v4l2 stateful or > stateless drivers > and generic GStreamer/FFMPEG/Chromium support. Maybe Cyrille can explain what it is currently done at NXP level regarding the integration of v4l2 with NXP VPU. >=20 > I'm raising this, since I'm worried that no one cares of solving that > high level > problem from a generic point of view. In that context, any additions > to the > mainline Linux kernel can only be flawed and will only serves > specific vendors > and not the larger audience. >=20 > Another aspect, is that this design might be bound to a specific (NXP > ?) > security design. I've learn recently that newer HW is going to use > multiple > level of MMU (like virtual machines do) to protect the memory rather > then > marking pages. Will all this work for that too ? our fire-walling hardware is protecting memory behind the MMU and so rely on physical memory layout. this work is only relying on a reserved physical memory. Regards, Olivier >=20 > regards, > Nicolas