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Tue, 23 Jun 2020 19:51:32 -0800 Received: from MTKMBS01N2.mediatek.inc (172.21.101.79) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 23 Jun 2020 20:51:28 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Jun 2020 11:51:20 +0800 Received: from [172.21.77.33] (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 24 Jun 2020 11:51:20 +0800 Message-ID: <1592970682.14160.6.camel@mtkswgap22> Subject: Re: Add MediaTek MT6873 devapc driver From: Neal Liu To: Rob Herring Date: Wed, 24 Jun 2020 11:51:22 +0800 In-Reply-To: <20200609173204.GB1107294@bogus> References: <1591698261-22639-1-git-send-email-neal.liu@mediatek.com> <20200609173204.GB1107294@bogus> X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-TM-SNTS-SMTP: 94B690576371ABB4BE2991BDACDFB8DE814464701461FFE7D00C600E775A57D32000:8 X-MTK: N X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, wsd_upstream@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, Matthias Brugger , Neal Liu , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On Tue, 2020-06-09 at 11:32 -0600, Rob Herring wrote: > On Tue, Jun 09, 2020 at 06:24:19PM +0800, Neal Liu wrote: > > These patch series introduce a MediaTek MT6873 devapc driver. > > > > MT6873 bus frabric provides TrustZone security support and data > > protection to prevent slaves from being accessed by unexpected > > masters. > > The security violations are logged and sent to the processor for > > further analysis or countermeasures. > > > > Any occurrence of security violation would raise an interrupt, and > > it will be handled by devapc-mt6873 driver. The violation > > information is printed in order to find the murderer. > > There's also a proposed driver with similar functionality[1]. Come up > with a common solution. > > Rob > > [1] https://lore.kernel.org/linux-arm-kernel/20200128153806.7780-1-benjamin.gaignard@st.com/ Actually, Mediatek devapc HW do the similar things. But the real "firewall" functionality is implemented in TrustZone instread of REE. This devapc-mt6873 driver is mainly handled the violation. Bus firewall framework seems not cover this parts. _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5950C433E0 for ; Wed, 24 Jun 2020 03:53:20 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 96B4A2070E for ; 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bh=2Dog3+Nae8JVLbPa7qMUki8StCUSkZ7vDzgUmgL8nCI=; b=LHkJg7YgjU04Nt6u/wwESrQfe1U61/PUIjrTRHJUv06I7DJZjtziIHvpHoLxkWhAx9lvbfpTF4Keg1+3VJdyWy6SBG469XasDS1heAPhFAWVwlxSqWZa06uP/h/DawRL9PPvA4KV2jmqmvNuLtO8kUBkKLyvWcG3M1jVwF7zGgw=; X-UUID: a2ec4f73cc754175aaa566409a22fcf3-20200623 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 873973364; Tue, 23 Jun 2020 19:51:32 -0800 Received: from MTKMBS01N2.mediatek.inc (172.21.101.79) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 23 Jun 2020 20:51:28 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Jun 2020 11:51:20 +0800 Received: from [172.21.77.33] (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 24 Jun 2020 11:51:20 +0800 Message-ID: <1592970682.14160.6.camel@mtkswgap22> Subject: Re: Add MediaTek MT6873 devapc driver From: Neal Liu To: Rob Herring Date: Wed, 24 Jun 2020 11:51:22 +0800 In-Reply-To: <20200609173204.GB1107294@bogus> References: <1591698261-22639-1-git-send-email-neal.liu@mediatek.com> <20200609173204.GB1107294@bogus> X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-TM-SNTS-SMTP: 94B690576371ABB4BE2991BDACDFB8DE814464701461FFE7D00C600E775A57D32000:8 X-MTK: N X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, wsd_upstream@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, Matthias Brugger , Neal Liu , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 2020-06-09 at 11:32 -0600, Rob Herring wrote: > On Tue, Jun 09, 2020 at 06:24:19PM +0800, Neal Liu wrote: > > These patch series introduce a MediaTek MT6873 devapc driver. > > > > MT6873 bus frabric provides TrustZone security support and data > > protection to prevent slaves from being accessed by unexpected > > masters. > > The security violations are logged and sent to the processor for > > further analysis or countermeasures. > > > > Any occurrence of security violation would raise an interrupt, and > > it will be handled by devapc-mt6873 driver. The violation > > information is printed in order to find the murderer. > > There's also a proposed driver with similar functionality[1]. Come up > with a common solution. > > Rob > > [1] https://lore.kernel.org/linux-arm-kernel/20200128153806.7780-1-benjamin.gaignard@st.com/ Actually, Mediatek devapc HW do the similar things. But the real "firewall" functionality is implemented in TrustZone instread of REE. This devapc-mt6873 driver is mainly handled the violation. Bus firewall framework seems not cover this parts. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 683D3C433E0 for ; Wed, 24 Jun 2020 03:51:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34AB02070E for ; Wed, 24 Jun 2020 03:51:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="LHkJg7Yg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388666AbgFXDvd (ORCPT ); Tue, 23 Jun 2020 23:51:33 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:31285 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2388665AbgFXDvd (ORCPT ); Tue, 23 Jun 2020 23:51:33 -0400 X-UUID: ab9f33d4d1164f7d944f2ceff272d664-20200624 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:MIME-Version:Content-Type:References:In-Reply-To:Date:CC:To:From:Subject:Message-ID; bh=2Dog3+Nae8JVLbPa7qMUki8StCUSkZ7vDzgUmgL8nCI=; b=LHkJg7YgjU04Nt6u/wwESrQfe1U61/PUIjrTRHJUv06I7DJZjtziIHvpHoLxkWhAx9lvbfpTF4Keg1+3VJdyWy6SBG469XasDS1heAPhFAWVwlxSqWZa06uP/h/DawRL9PPvA4KV2jmqmvNuLtO8kUBkKLyvWcG3M1jVwF7zGgw=; X-UUID: ab9f33d4d1164f7d944f2ceff272d664-20200624 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1208736638; Wed, 24 Jun 2020 11:51:30 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Jun 2020 11:51:20 +0800 Received: from [172.21.77.33] (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 24 Jun 2020 11:51:20 +0800 Message-ID: <1592970682.14160.6.camel@mtkswgap22> Subject: Re: Add MediaTek MT6873 devapc driver From: Neal Liu To: Rob Herring CC: Neal Liu , Matthias Brugger , , , , , Date: Wed, 24 Jun 2020 11:51:22 +0800 In-Reply-To: <20200609173204.GB1107294@bogus> References: <1591698261-22639-1-git-send-email-neal.liu@mediatek.com> <20200609173204.GB1107294@bogus> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-TM-SNTS-SMTP: 94B690576371ABB4BE2991BDACDFB8DE814464701461FFE7D00C600E775A57D32000:8 X-MTK: N Content-Transfer-Encoding: base64 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org T24gVHVlLCAyMDIwLTA2LTA5IGF0IDExOjMyIC0wNjAwLCBSb2IgSGVycmluZyB3cm90ZToNCj4g T24gVHVlLCBKdW4gMDksIDIwMjAgYXQgMDY6MjQ6MTlQTSArMDgwMCwgTmVhbCBMaXUgd3JvdGU6 DQo+ID4gVGhlc2UgcGF0Y2ggc2VyaWVzIGludHJvZHVjZSBhIE1lZGlhVGVrIE1UNjg3MyBkZXZh cGMgZHJpdmVyLg0KPiA+IA0KPiA+IE1UNjg3MyBidXMgZnJhYnJpYyBwcm92aWRlcyBUcnVzdFpv bmUgc2VjdXJpdHkgc3VwcG9ydCBhbmQgZGF0YQ0KPiA+IHByb3RlY3Rpb24gdG8gcHJldmVudCBz bGF2ZXMgZnJvbSBiZWluZyBhY2Nlc3NlZCBieSB1bmV4cGVjdGVkDQo+ID4gbWFzdGVycy4NCj4g PiBUaGUgc2VjdXJpdHkgdmlvbGF0aW9ucyBhcmUgbG9nZ2VkIGFuZCBzZW50IHRvIHRoZSBwcm9j ZXNzb3IgZm9yDQo+ID4gZnVydGhlciBhbmFseXNpcyBvciBjb3VudGVybWVhc3VyZXMuDQo+ID4g DQo+ID4gQW55IG9jY3VycmVuY2Ugb2Ygc2VjdXJpdHkgdmlvbGF0aW9uIHdvdWxkIHJhaXNlIGFu IGludGVycnVwdCwgYW5kDQo+ID4gaXQgd2lsbCBiZSBoYW5kbGVkIGJ5IGRldmFwYy1tdDY4NzMg ZHJpdmVyLiBUaGUgdmlvbGF0aW9uDQo+ID4gaW5mb3JtYXRpb24gaXMgcHJpbnRlZCBpbiBvcmRl ciB0byBmaW5kIHRoZSBtdXJkZXJlci4NCj4gDQo+IFRoZXJlJ3MgYWxzbyBhIHByb3Bvc2VkIGRy aXZlciB3aXRoIHNpbWlsYXIgZnVuY3Rpb25hbGl0eVsxXS4gQ29tZSB1cCANCj4gd2l0aCBhIGNv bW1vbiBzb2x1dGlvbi4NCj4gDQo+IFJvYg0KPiANCj4gWzFdIGh0dHBzOi8vbG9yZS5rZXJuZWwu b3JnL2xpbnV4LWFybS1rZXJuZWwvMjAyMDAxMjgxNTM4MDYuNzc4MC0xLWJlbmphbWluLmdhaWdu YXJkQHN0LmNvbS8NCg0KQWN0dWFsbHksIE1lZGlhdGVrIGRldmFwYyBIVyBkbyB0aGUgc2ltaWxh ciB0aGluZ3MuIEJ1dCB0aGUgcmVhbA0KImZpcmV3YWxsIiBmdW5jdGlvbmFsaXR5IGlzIGltcGxl bWVudGVkIGluIFRydXN0Wm9uZSBpbnN0cmVhZCBvZiBSRUUuDQpUaGlzIGRldmFwYy1tdDY4NzMg ZHJpdmVyIGlzIG1haW5seSBoYW5kbGVkIHRoZSB2aW9sYXRpb24uDQoNCkJ1cyBmaXJld2FsbCBm cmFtZXdvcmsgc2VlbXMgbm90IGNvdmVyIHRoaXMgcGFydHMuDQo=