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=-2.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 35150C169C4 for ; Tue, 29 Jan 2019 05:50:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05F4D20989 for ; Tue, 29 Jan 2019 05:50:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="HhrYi0zk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727090AbfA2FuG (ORCPT ); Tue, 29 Jan 2019 00:50:06 -0500 Received: from mail-pg1-f194.google.com ([209.85.215.194]:46804 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725497AbfA2FuG (ORCPT ); Tue, 29 Jan 2019 00:50:06 -0500 Received: by mail-pg1-f194.google.com with SMTP id w7so8276686pgp.13 for ; Mon, 28 Jan 2019 21:50:05 -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=25+EHUW/QviVkEKkPntqDGS9uSaHWPwEdP3cMqn+uH0=; b=HhrYi0zkE1/W1dskxLTKFXudDjf1IrbxwRmZ1Dbox2C4stm/elFzLNyP9whCYtq+1w rWW9V+gSWoyagoaf4ITBQ+H1Ix7zqRvaimyBKm8RSBkxgcIKqYR82Q7bo09XNEoV5CSI K4vbY6+lhKzJg9ts7FySJ0ONgYDuC1HmkGCYk= 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=25+EHUW/QviVkEKkPntqDGS9uSaHWPwEdP3cMqn+uH0=; b=RzylKI9rV2w81JQE9XPjOFEvw7nt/XRU6QkGEBIb1GWPDnttwjOlEEAXUAR/4tFK5P E06D92lb0hqhhU+fQ1GAXjSJMTKWH4xiN+PQjiQd05zNF81Ae2/ENF0Yi/h3a7qI9Gtb Z4LzPnGESI83RZWni9+CBmAohUxtx6XgBO+V8lr5XGco+xk2+kebhpPshnSTTcossNTl zfRDyRF8EhJBk1oOSaThpAqFqwJ8w49HlXO0NsmA71WW4uRlxMi6Tfk50KKkxvTI9JZn xKBddyfdym2l4048t4ZKroPx8seDRtaDhY4jnACXPOrLB3kd8O6hm27ekAO4uC8m3f6N wzGg== X-Gm-Message-State: AJcUukfVbksdmkzi4jamWbfMYhyWYH6+fTZqJYbu+r7zERLftmeU/pBe gn/susHvyWp1Fx5UqDEbBPAjzg== X-Google-Smtp-Source: ALg8bN5uf7lhKRp8F1xGSW2J9DBg7/knYKJdQQ+eIf6pqzX4vPltxwUfAWN1tnqNG5JMVZYGbHu1PA== X-Received: by 2002:a63:c141:: with SMTP id p1mr22499168pgi.424.1548741005087; Mon, 28 Jan 2019 21:50:05 -0800 (PST) Received: from localhost.localdomain ([117.252.69.38]) by smtp.gmail.com with ESMTPSA id y12sm57379437pfk.70.2019.01.28.21.49.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 28 Jan 2019 21:50:04 -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, yamada.masahiro@socionext.com, michal.lkml@markovi.net, 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 v6 0/4] Introduce TEE bus driver framework Date: Tue, 29 Jan 2019 11:19:34 +0530 Message-Id: <1548740978-28495-1-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 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 v6: 1. Incorporate some nitpicks in patch #1 and #3. 2. Bundle all statics in a data structure in patch #4 and use dev_* instead of pr_*. 3. Add reviewed-by tags for patch #1, #2 and #3. Changes in v5: 1. Add support in module device table for TEE bus devices. 2. Correct license for optee-rng module. 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 | 298 +++++++++++++++++++++++++++++++++++++ drivers/tee/optee/Makefile | 1 + drivers/tee/optee/core.c | 4 + drivers/tee/optee/device.c | 155 +++++++++++++++++++ drivers/tee/optee/optee_private.h | 3 + drivers/tee/optee/supp.c | 10 +- drivers/tee/tee_core.c | 67 ++++++++- include/linux/mod_devicetable.h | 9 ++ include/linux/tee_drv.h | 38 ++++- scripts/mod/devicetable-offsets.c | 3 + scripts/mod/file2alias.c | 19 +++ 14 files changed, 622 insertions(+), 6 deletions(-) create mode 100644 drivers/char/hw_random/optee-rng.c create mode 100644 drivers/tee/optee/device.c -- 2.7.4