From patchwork Mon Jan 21 09:29:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sumit Garg X-Patchwork-Id: 156184 Delivered-To: patch@linaro.org Received: by 2002:a02:48:0:0:0:0:0 with SMTP id 69csp6167718jaa; Mon, 21 Jan 2019 01:29:57 -0800 (PST) X-Google-Smtp-Source: ALg8bN7LII5pGO86pOb8CatECUtEjV2pe5O4dJoTmXKdVuHa33T/t20G6bpKQzk6XaLG+RY4+1Gq X-Received: by 2002:a17:902:b592:: with SMTP id a18mr29414174pls.293.1548062997758; Mon, 21 Jan 2019 01:29:57 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548062997; cv=none; d=google.com; s=arc-20160816; b=nCystpk+q6mphkdTdE47Uq0zTcvRn9wBRiJ9ebbdQ3guSRJW29OOEEbGwt0zctPbTM pOFzIyn4R9dLe2Vamufsz0iEOb08Jk4Jhv53KxGFCQKr9gZuuhv/heJ5lMzgxlEPrr3M 6BAKAQjabaqzlhqGDaRRSlvAfCQQLjqwnN+osAcCiouGhYMpP5dpLYO4vTI/E8cyK57o 2MoxldDb+b6DpkkiUFU4fFSJVdNdsCCYtuUEwkR1mX94rah9m4LGX9GBx5rkAZwN/fEL aBFLRlEE7bTYik1/GO4iz6pywHQeUbAeKmMQjn9WjdEIEpK6kXe8zBc8adziYeTJfC9e nJtA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :dkim-signature; bh=ezNTvp94HxKfIHnuTDGydgVtNdYFJn6q8Xf3NcPa2u4=; b=GC950bZGOUsLUSdPdM+zzM9adP1vkP2NyZ6w7oLMsCSHWxClWQXVDku2cEzBEt8AAf I26MEv+X7+xTEqA21S1lFo14GqGqrnRF07yI7XO1Nizi1gVF3z4jgPkdP9zovFr4TLH/ pcREC/Hz5V+dHe9mVZXDCOZGgcKinp0qZzcGHUBQDEV0/QSWY/Gba9cuhQLAMH50mXs9 MJ6MliFO2Bp0VI262K+E0XoPUTIazbgYu70oVk8l3u1h6orS5ElyOXBoUspKGmBGRPBB htqiOYqle9joVRa9gZ/zlZLihJYox95X13s0vG28qJpYLEXqgsMaL2NdlN3ofGTx2CX4 58hA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=bm2OnHA3; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id o1si11746886plk.257.2019.01.21.01.29.57; Mon, 21 Jan 2019 01:29:57 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=bm2OnHA3; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727619AbfAUJ3z (ORCPT + 24 others); Mon, 21 Jan 2019 04:29:55 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:44076 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726418AbfAUJ3z (ORCPT ); Mon, 21 Jan 2019 04:29:55 -0500 Received: by mail-pf1-f196.google.com with SMTP id u6so9852667pfh.11 for ; Mon, 21 Jan 2019 01:29:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=ezNTvp94HxKfIHnuTDGydgVtNdYFJn6q8Xf3NcPa2u4=; b=bm2OnHA3iMTFUED27Q3idWBXeh8Qos+EktXabpmpTUs33p0wICYqztSSpUPVGyn0ni fDlRIj+cxLoUVBl4ZguBFkQEaPWF0mHhmsGdi06pcOpCffcMKdcTcYwJQVohdak7YV47 yqbCYv0KazcwxOlJYINw0M6QPfJTT/Fd5Yveg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=ezNTvp94HxKfIHnuTDGydgVtNdYFJn6q8Xf3NcPa2u4=; b=ZxI9yH14+JklCjIjVQLwL8cWD1cW3AMFoeeBl6/1ePwTb2B4EB+7sPTtuMqUQfEMnO l/J40SznIXKMmfOIvNFCXKDKyIZbYOA+RXKaSo2J/kPrLWBGAMpUGSZn55ULiNHjpn0k eIz0ZZoUbJDffl916GW7lgoRd8tMLg+OgGpJVomS+nMoyNhikTHVZWAQR0nWqoSxiJ6U Hq1cggtaV+8XvxIUdVuhf10eeCIMUrCmAK0mTz8FL6IDx9jWqVfRlxl9nq0k7LIdM3my ByGnbjlC+/p6/2gdojtq3Cxfl7Z24ZOk2o1JRLK+I0mmB1KYKKPlvr/Pk5O69xz+wtsl qptg== X-Gm-Message-State: AJcUukeRIM2vpbS+QIn58e4OWBDdrO6732DwTWiilNfgSV+YctTPAISG NflcXdeR6+OyMuSvV9BHXXIHLQ== X-Received: by 2002:a63:5026:: with SMTP id e38mr27560627pgb.123.1548062993927; Mon, 21 Jan 2019 01:29:53 -0800 (PST) Received: from localhost.localdomain ([117.252.65.115]) by smtp.gmail.com with ESMTPSA id h9sm16182777pgd.53.2019.01.21.01.29.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 21 Jan 2019 01:29:53 -0800 (PST) From: Sumit Garg To: jens.wiklander@linaro.org, herbert@gondor.apana.org.au Cc: linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, mpm@selenic.com, robh+dt@kernel.org, mark.rutland@arm.com, arnd@arndb.de, gregkh@linuxfoundation.org, daniel.thompson@linaro.org, ard.biesheuvel@linaro.org, bhsharma@redhat.com, tee-dev@lists.linaro.org, Sumit Garg Subject: [PATCH v4 0/4] Introduce TEE bus driver framework Date: Mon, 21 Jan 2019 14:59:15 +0530 Message-Id: <1548062959-31860-1-git-send-email-sumit.garg@linaro.org> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series introduces a generic TEE bus driver concept for TEE based kernel drivers which would like to communicate with TEE based devices/ services. Patch #1 adds TEE bus concept where devices/services are identified via Universally Unique Identifier (UUID) and drivers register a table of device UUIDs which they can support. This concept also allows for device enumeration to be specific to corresponding TEE implementation like OP-TEE etc. Patch #2 adds supp_nowait flag for non-blocking requests arising via TEE internal client interface. Patch #3 adds TEE bus device enumeration support for OP-TEE. OP-TEE provides a pseudo TA to enumerate TAs which can act as devices/services for TEE bus. Patch #4 adds OP-TEE based hwrng driver which act as TEE bus driver. On ARM SoC's with TrustZone enabled, peripherals like entropy sources might not be accessible to normal world (linux in this case) and rather accessible to secure world (OP-TEE in this case) only. So this driver aims to provides a generic interface to OP-TEE based random number generator service. Example case is Developerbox based on Socionext's Synquacer SoC [1] which provides 7 thermal sensors accessible from secure world only which could be used as entropy sources (thermal/measurement noise). [1] https://www.96boards.org/product/developerbox/ Changes in v4: 1. Use typedef instead of single member tee_client_device_id struct. 2. Incorporate TEE bus nitpicks. Changes in v3: 1. Fixed bus error path in Patch #1. 2. Reversed order of Patch #2 and #3. 3. Fixed miscellaneous syntax comments and memory leak. 4. Added comments in Patch #2 for supp_nowait flag. Changes in v2: Based on review comments, the scope of this series has increased as follows: 1. Added TEE bus driver framework. 2. Added OP-TEE based device enumeration. 3. Register optee-rng driver as TEE bus driver. 4. Removed DT dependency for optee-rng device UUID. 5. Added supp_nowait flag. Sumit Garg (4): tee: add bus driver framework for TEE based devices tee: add supp_nowait flag in tee_context struct tee: optee: add TEE bus device enumeration support hwrng: add OP-TEE based rng driver MAINTAINERS | 5 + drivers/char/hw_random/Kconfig | 15 ++ drivers/char/hw_random/Makefile | 1 + drivers/char/hw_random/optee-rng.c | 272 +++++++++++++++++++++++++++++++++++++ drivers/tee/optee/Makefile | 1 + drivers/tee/optee/core.c | 4 + drivers/tee/optee/device.c | 153 +++++++++++++++++++++ drivers/tee/optee/optee_private.h | 3 + drivers/tee/optee/supp.c | 10 +- drivers/tee/tee_core.c | 58 +++++++- include/linux/tee_drv.h | 43 +++++- 11 files changed, 559 insertions(+), 6 deletions(-) create mode 100644 drivers/char/hw_random/optee-rng.c create mode 100644 drivers/tee/optee/device.c -- 2.7.4