From patchwork Fri Jan 11 11:47:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sumit Garg X-Patchwork-Id: 10757909 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 998D76C5 for ; Fri, 11 Jan 2019 11:50:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 864BA2987A for ; Fri, 11 Jan 2019 11:50:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7572129586; Fri, 11 Jan 2019 11:50:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED3B529586 for ; Fri, 11 Jan 2019 11:50:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729508AbfAKLuA (ORCPT ); Fri, 11 Jan 2019 06:50:00 -0500 Received: from mail-pg1-f195.google.com ([209.85.215.195]:39720 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729272AbfAKLt7 (ORCPT ); Fri, 11 Jan 2019 06:49:59 -0500 Received: by mail-pg1-f195.google.com with SMTP id w6so6232808pgl.6 for ; Fri, 11 Jan 2019 03:49:59 -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=fq7MtF2ScfFMWpdvczijzx7e8y4b1AHJmZlcX4q9K6E=; b=MMP3kchMB/DsEDH6qKdnq4FW7h9C13s8fWAZrNzFO0A7fxdeLbdZNF8uE0IffLs8CA lyvM77ueEBR986Phanff3BbH9CXq5jsskuaPLrjnLUcIVqtPCup+3CfSk2IE5/vXM8lG Vgo5G2OojyHYYHxnG2Cta220tf0tN5US0+Ssg= 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=fq7MtF2ScfFMWpdvczijzx7e8y4b1AHJmZlcX4q9K6E=; b=mdZAeHE/lFog2ocxWjEW2wfM3tIWOgNeukWRHpbmLKz9DjkYWB7RDXnLWPR0gEgw/Z uVwqK7R9MavQB5/WoeLlj8or4+pB4FG0HVC33sUv9eD7TASetkzydTgJjg5vX+Z1F3ut 9iNQLJ7ER9ZDaL8MmIt6Xg0dDmsgMua7VZI1jEqtvUgvyTflKOgK4CAy8QR71bzu3r8R 8rnKLcvXVGwLFY+Ekl9veHpObIJXyKzy/TBBM7jrKVeD44ua/uxEnG//aDSVyvf4a4YS QcNQYOXuXHqPFXwYz0CNkfeh9HiwD/YY2puRVpYewug+CJq/G/KPHWfkenDTn+cAoNJq Tbsw== X-Gm-Message-State: AJcUukcoMcwoza1gtnMjllVLjbdxfLmwolcnw3uP/zQix59GoJj3t0FY 7FoGTsFLEhFgbi6AyAxfpb7kDQ== X-Google-Smtp-Source: ALg8bN4L4Q4YuEIyK/IxKjebItlbdc/puOKAnbLfwMhu7SK2SJW3WCIykfjif0Mkxoa4i93mfgFwRQ== X-Received: by 2002:a65:4b82:: with SMTP id t2mr13132854pgq.189.1547207398922; Fri, 11 Jan 2019 03:49:58 -0800 (PST) Received: from localhost.localdomain ([117.196.233.251]) by smtp.gmail.com with ESMTPSA id b2sm143199988pfm.3.2019.01.11.03.49.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 11 Jan 2019 03:49:58 -0800 (PST) From: Sumit Garg To: linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org, jens.wiklander@linaro.org, mpm@selenic.com, herbert@gondor.apana.org.au, 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 v3 0/4] Introduce TEE bus driver framework Date: Fri, 11 Jan 2019 17:17:27 +0530 Message-Id: <1547207251-9372-1-git-send-email-sumit.garg@linaro.org> X-Mailer: git-send-email 2.7.4 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 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 | 56 +++++++- include/linux/tee_drv.h | 42 ++++++ 11 files changed, 558 insertions(+), 4 deletions(-) create mode 100644 drivers/char/hw_random/optee-rng.c create mode 100644 drivers/tee/optee/device.c