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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32C32C433EF for ; Wed, 6 Oct 2021 07:16:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1BC96610E6 for ; Wed, 6 Oct 2021 07:16:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237331AbhJFHRu (ORCPT ); Wed, 6 Oct 2021 03:17:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231281AbhJFHRu (ORCPT ); Wed, 6 Oct 2021 03:17:50 -0400 Received: from mail-lf1-x132.google.com (mail-lf1-x132.google.com [IPv6:2a00:1450:4864:20::132]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 508A5C061749 for ; Wed, 6 Oct 2021 00:15:58 -0700 (PDT) Received: by mail-lf1-x132.google.com with SMTP id j5so6317701lfg.8 for ; Wed, 06 Oct 2021 00:15:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=AKrh6jeg1+D2CUT4DyWcA9w76ozKBLfI8b6gpIDDpCY=; b=jlvFw1VyiUIGeXyBbQ9knQIXcxkL5XR1d87HM6bU+T3TKIwdXnnumNjfeQaX1d878T svv3scwdLS4dmAva4UIVS5EK12PD74qGcJ652OscGWQNjBkuAhLvcdubUBVqPWpiC3VI jhCmorePoM8uiIS2+Cu6GdwuJcx1eCQ9hpHMNsyi4arUZbX2dCNVCm3/cbkH4f8hDrGa 7Dlf6EqmJ+v6doctL4CnV4sN6f8We+sz5hu6w/zdGmU+YUbXKpWyJoQ+ZfIIY9YzN2br iE/CQRmOgCbFlFOzyF6uRhd3BEV1iJp+OKQUIqi2lkWSk6jlXgYeraLdeSBPkuCyPp1H d5FQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=AKrh6jeg1+D2CUT4DyWcA9w76ozKBLfI8b6gpIDDpCY=; b=trItot45Uuk+dVNZJFX/44kEKA4AUel+evBt0x3LiV1OtJiQNM6yZyg619f6tmYHn7 5Mg2jJksSAY3H2OkAkp5aRCwf1k7/LhKvL+8M1FJmv0k6zWD5UsMQT7mTQIZVyo9AFlp RcZPOxD/yEfPiUmBp5dbUj1PxuBPH8Z0IFuOQflj4I9xiiLjVNhwdSQ1bJiBK42SCpei 8F3VKeCMvRCldySblypkqnG26pR1yp2xa+OkI90oh+VkYy9jpv8RCX4PlcdecEF87wEE PqimFB1FL0UKs+qZ+q7ssz3iokWm2IQFvDhBw92Yk56gIhK8cOq+fjRMwKP3PJ2rKcyc 0VgA== X-Gm-Message-State: AOAM532rvSnvHMXqGH+45H2PQagX7NXPAt2tnZFnKYHoA/J0VS8rSg6M eefDcgmm3hnbBNobpppKZKNM2w== X-Google-Smtp-Source: ABdhPJxX+Sqcew6GyVwEuZ8oDl53IzGhaBx4xrF1wNs0tSxodxjwllEsfBZ5NsFHcMMU+iWWjE3zCQ== X-Received: by 2002:a05:651c:1039:: with SMTP id w25mr26709368ljm.440.1633504556692; Wed, 06 Oct 2021 00:15:56 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.15.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:15:56 -0700 (PDT) From: Jens Wiklander To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, op-tee@lists.trustedfirmware.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org Cc: Jerome Forissier , Etienne Carriere , Sumit Garg , Vincent Guittot , Rob Herring , Jonathan Corbet , Ard Biesheuvel , Marc Zyngier , Jens Wiklander Subject: [PATCH v6 0/6] Asynchronous notifications from secure world Date: Wed, 6 Oct 2021 09:15:40 +0200 Message-Id: <20211006071546.2540920-1-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Hi all, This adds support for asynchronous notifications from OP-TEE in secure world to the OP-TEE driver. This allows a design with a top half and bottom half type of driver where the top half runs in secure interrupt context and a notifications tells normal world to schedule a yielding call to do the bottom half processing. An edge-triggered interrupt is used to notify the driver that there are asynchronous notifications pending. The documentation and DT bindings patches are now well reviewed, but the patches with code would do with some more attention. v5->v6: * Rebased on v5.15-rc2 * Replaced "tee: add tee_dev_open_helper() primitive" with "tee: export teedev_open() and teedev_close_context()" since it turned out that the normal teedev functions could be used instead as noted by Sumit. * Changed "optee: add asynchronous notifications" to use the exported teedev_open() and teedev_close_context() functions instead. v4->v5: * Rebased on v5.14-rc7 * Updated documentation to clarify that one interrupt may represent multiple notifications as requested. * Applied Marc's and Rob's tags v3->v4: * Clarfied the expected type of interrypt is edge-triggered, both in the normal documentation and in the DT bindings as requested. v2->v3: * Rebased on v5.14-rc2 which made the patch "dt-bindings: arm: Convert optee binding to json-schema" from the V2 patch set obsolete. * Applied Ard's Acked-by on "optee: add asynchronous notifications" v1->v2: * Added documentation * Converted optee bindings to json-schema and added interrupt property * Configure notification interrupt from DT instead of getting it from secure world, suggested by Ard Biesheuvel . Thanks, Jens Jens Wiklander (6): docs: staging/tee.rst: add a section on OP-TEE notifications dt-bindings: arm: optee: add interrupt property tee: fix put order in teedev_close_context() tee: export teedev_open() and teedev_close_context() optee: separate notification functions optee: add asynchronous notifications .../arm/firmware/linaro,optee-tz.yaml | 7 + Documentation/staging/tee.rst | 30 +++ drivers/tee/optee/Makefile | 1 + drivers/tee/optee/call.c | 27 +++ drivers/tee/optee/core.c | 87 +++++-- drivers/tee/optee/notif.c | 226 ++++++++++++++++++ drivers/tee/optee/optee_msg.h | 9 + drivers/tee/optee/optee_private.h | 23 +- drivers/tee/optee/optee_rpc_cmd.h | 31 +-- drivers/tee/optee/optee_smc.h | 75 +++++- drivers/tee/optee/rpc.c | 73 +----- drivers/tee/tee_core.c | 10 +- include/linux/tee_drv.h | 14 ++ 13 files changed, 496 insertions(+), 117 deletions(-) create mode 100644 drivers/tee/optee/notif.c -- 2.31.1