From patchwork Wed Oct 6 07:15:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Wiklander X-Patchwork-Id: 12538771 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 D0653C433F5 for ; Wed, 6 Oct 2021 07:18:43 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 92E3161100 for ; Wed, 6 Oct 2021 07:18:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 92E3161100 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9gJ3QBUlg6tGXrQpCfBnLHmBjVZCRv484TyquAVYEz4=; b=ujHKIRIh5qe+P0 1PodnLiRWJOGW8RhcEfNF4eW8ZBdN6dWGoOFazKChbScOWWhJLO3KF/dtE7q2BV4yLCDHxXjvXhyj 9VbYPfK0dt1xPdOOTIRt2nVsYA/zIcUX239aT6oGDmk5mh83KTOWDNsJrIhtE37d22F5KyY2OlTg8 TRTYrrx0BHmOPZ9Pvar772axNsws5RIRUoP2Masw3FFWhvh0NwJax8rfNBy4ATYdptpNvAFyCjLug KApbYK4j7aVJa4JuNnnevY5lLjLgiCee3xbVjW8KaQkDighKtikpWwiwYrEe7dP7O0CMWVsZU32Mw gZm2Z0qzH4UlFqXi1mGg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY1A3-00DAeD-UE; Wed, 06 Oct 2021 07:16:20 +0000 Received: from mail-lf1-x12b.google.com ([2a00:1450:4864:20::12b]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY19j-00DAVj-MA for linux-arm-kernel@lists.infradead.org; Wed, 06 Oct 2021 07:16:01 +0000 Received: by mail-lf1-x12b.google.com with SMTP id u18so6227878lfd.12 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:in-reply-to:references :mime-version:content-transfer-encoding; bh=GhgYsmvqrAxJX0LtPmrYeEXggYv/fhoAephchEquNLc=; b=qZ2J2cmjhB2VqX9Km6Q6J8+EDY/Byt4T6pq0U/D0wN4lykmD63FfuuD+fJIfFHVRZz xKFpUozUWuvyHcdHgrwmFIBMmoP4J197KoLhErtOskLIxdLjFontl7R9pQAyKhpcdPrs K9uWPcqht+rCnG1ENKmU+h2xP38N1+OO9nKfWUqrjr77EDSOV0iHoqd5DKQAEqUaJA2p WGgNwU+oGWY22rtQfAd8dui1O5aJvRnuF+dw8RVjAAz1RkSLBBuKxN8XS6htvnM2ceGl NoQ2U/sUNulNe/Toti1VtEvIc/fXLULR8NcXEZ9zB2uaYQg91ryWFSJsrVXuiOlxrDHF REJg== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=GhgYsmvqrAxJX0LtPmrYeEXggYv/fhoAephchEquNLc=; b=muNuC3HLh8Zz3qIorTK8+ZlPKCMeNkG0SXdT0gYhU4n+pVh7a//XUYz+1sSly4HcLX HCBhOTK3iJY/V0Nzg1XqDf6UBHUJTUTqH64Fcd3YQyw1NDW6Pa4Wu/ov69fGriechgMw BfOvHJ5INsx9tC/VsFPOobeXdB5/Oh4m+2LWIr6rEE3Nbnrmw+XZ/V5Leh3Ny303mwOL sia212zFzf8wYkrheBP2hCtilmKYZVwi2hMdTs2nrwbfr1Y2VQnrw5YvINz6GJg0GzQ9 SIE9yFsIRIyaAWRUisDRSPoIAlzBlEssn+yaGlFJbQ44AIQqOtWQCln/yWr8AJBkUGnn Qxlw== X-Gm-Message-State: AOAM533yGCNHe2IlgZf9LLpirNcM3c5yI7e/4ftMeOS3FqJ0lvVdXnNm V0h+1H/PN/FvLD5zOcytzGMQKA== X-Google-Smtp-Source: ABdhPJwtfl7F40OaEjwCa3PdkHOjNi97Tw8IzsbW5Pthd2LioQtmz+sAMXibm8v3pPCOhxrMakoxGw== X-Received: by 2002:a05:6512:3a83:: with SMTP id q3mr8077047lfu.115.1633504557651; Wed, 06 Oct 2021 00:15:57 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.15.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:15:57 -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 1/6] docs: staging/tee.rst: add a section on OP-TEE notifications Date: Wed, 6 Oct 2021 09:15:41 +0200 Message-Id: <20211006071546.2540920-2-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211006071546.2540920-1-jens.wiklander@linaro.org> References: <20211006071546.2540920-1-jens.wiklander@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211006_001559_747255_39BBF19B X-CRM114-Status: GOOD ( 13.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adds a section on notifications used by OP-TEE, synchronous and asynchronous. Acked-by: Marc Zyngier Signed-off-by: Jens Wiklander Reviewed-by: Sumit Garg --- Documentation/staging/tee.rst | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/Documentation/staging/tee.rst b/Documentation/staging/tee.rst index 4d4b5f889603..3c63d8dcd61e 100644 --- a/Documentation/staging/tee.rst +++ b/Documentation/staging/tee.rst @@ -184,6 +184,36 @@ order to support device enumeration. In other words, OP-TEE driver invokes this application to retrieve a list of Trusted Applications which can be registered as devices on the TEE bus. +OP-TEE notifications +-------------------- + +There are two kinds of notifications that secure world can use to make +normal world aware of some event. + +1. Synchronous notifications delivered with ``OPTEE_RPC_CMD_NOTIFICATION`` + using the ``OPTEE_RPC_NOTIFICATION_SEND`` parameter. +2. Asynchronous notifications delivered with a combination of a non-secure + edge-triggered interrupt and a fast call from the non-secure interrupt + handler. + +Synchronous notifications are limited by depending on RPC for delivery, +this is only usable when secure world is entered with a yielding call via +``OPTEE_SMC_CALL_WITH_ARG``. This excludes such notifications from secure +world interrupt handlers. + +An asynchronous notification is delivered via a non-secure edge-triggered +interrupt to an interrupt handler registered in the OP-TEE driver. The +actual notification value are retrieved with the fast call +``OPTEE_SMC_GET_ASYNC_NOTIF_VALUE``. Note that one interrupt can represent +multiple notifications. + +One notification value ``OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF`` has a +special meaning. When this value is received it means that normal world is +supposed to make a yielding call ``OPTEE_MSG_CMD_DO_BOTTOM_HALF``. This +call is done from the thread assisting the interrupt handler. This is a +building block for OP-TEE OS in secure world to implement the top half and +bottom half style of device drivers. + AMD-TEE driver ============== From patchwork Wed Oct 6 07:15:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Wiklander X-Patchwork-Id: 12538773 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 94A7DC433F5 for ; Wed, 6 Oct 2021 07:18:54 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 5FEAE61100 for ; Wed, 6 Oct 2021 07:18:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 5FEAE61100 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uEdPoHfqK3k6qXObTfc+2KuVcUR47E0qVPEsLIlnUog=; b=qR7wVIoWLelGzF Vwq6RLt9HMvXr5uJPDoSm7fTWI8vKZsQqZb2MUucHeXls9l3id8fsAeGpVcEn+oEswcDf2kNHDmfh lEdRPBclEf+ef1k3MKivEe89kZNHIFUfHF2ymtK5CcuyS9EbIbWxx5zquVQOotvhdrOTjWogfM9Xf cD0fRJ2DHr9VNeylvJbLBX4SMUXp86bcmFpr19G0tRxuiAFm5rsZVPM80A54/njA58IK0PwGkecNs 4M+96iuQ+MfyyCNXXsdfQxMRAK8BA5xXUk55WLBIhekJ+8bHTT9UQGrhrquCGoTQG/T06m+8kl0go mh7eLRhb61ljRnJ+hmOA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY1AJ-00DAh4-CA; Wed, 06 Oct 2021 07:16:36 +0000 Received: from mail-lf1-x12f.google.com ([2a00:1450:4864:20::12f]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY19k-00DAW2-LZ for linux-arm-kernel@lists.infradead.org; Wed, 06 Oct 2021 07:16:02 +0000 Received: by mail-lf1-x12f.google.com with SMTP id j5so6318073lfg.8 for ; Wed, 06 Oct 2021 00:15:59 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=iDycTN9yyDhhTwc3Srtfw/Rl+6JzgcjoQzGWlzOIGrY=; b=bL1vK0bJe9SYQdKHyy1dKB/mgq4Vvtr/CNZxPI/FnxsiDCl6Gxi+KPn3wk3CCXnX+i NNSZfXWkPFTeO43dCyDC5SKXojhCaUh6YCrXhbFyLoUDuc+PzPJFrqctTJmg4g2tTVSq sFXIZPcGmz6lEL4zwQqODImBDS90l6u5lj/lzqKa3mKgjNW/RZ1oEuPw6hHGtmuBsFZv MldsDpoMFwz2kDKAVvtXt3aZclN1NIpuP3D4BMSz+7XF0uY7LTe9NMfkPy4/Y25YFRPJ ieYI+zXAePfidQ5EKr9WP09uovQWWxTHnlUrCsXQMa0u2H3tbOpDTuFxawz0hjApOYiD wFdg== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=iDycTN9yyDhhTwc3Srtfw/Rl+6JzgcjoQzGWlzOIGrY=; b=34AefANL0jQFcnGDgj/d0bhqIs4AuIhvKhLLf2qYWTffqWry6nhGLxbBF7G8656mab pQZLiMDn1BeweCyD88dvs4kYstoSQ9tuBr5wqr6sseRNLBnE2BwJrluxq7XHenygMTps EsUJTt5wFijIcwAooFHOTgqrptz2oWjHCGAQbLLNOP+SU+w4BE1DEUX2aejri9c2jpQA sPy4ddxwGgVU0Y2bgSe0WRyzJl2VvVVITNig8QvulI5dajaXIzyI12b1/hQaJCYrrG8f 9qtteXF892hIn7+YObkIUsnXXHI5RpJuB/Mb30CPAz55SE3mG6XM3s0XxQCK1SOBWBEb w7zQ== X-Gm-Message-State: AOAM530Xu8scVWPEMCEowt2FTdhKW9DHSII6kLm35H0JtrQcPvq5EBHm K6+f/ODdgKiucYZfxPA8/HV4OA== X-Google-Smtp-Source: ABdhPJzpzB5JRrdp7tnCsR2cXo+ygIAaSy54kKxlbtwQNa7gbPL0/HRWBJ+pQt3QCVmLyTCywx1+0w== X-Received: by 2002:a2e:8843:: with SMTP id z3mr18431449ljj.457.1633504558653; Wed, 06 Oct 2021 00:15:58 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.15.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:15:58 -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 , Rob Herring Subject: [PATCH v6 2/6] dt-bindings: arm: optee: add interrupt property Date: Wed, 6 Oct 2021 09:15:42 +0200 Message-Id: <20211006071546.2540920-3-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211006071546.2540920-1-jens.wiklander@linaro.org> References: <20211006071546.2540920-1-jens.wiklander@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211006_001600_730332_47624315 X-CRM114-Status: GOOD ( 10.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adds an optional interrupt property to the optee binding. Reviewed-by: Rob Herring Acked-by: Marc Zyngier Signed-off-by: Jens Wiklander Reviewed-by: Sumit Garg --- .../devicetree/bindings/arm/firmware/linaro,optee-tz.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml index c24047c1fdd5..40c9f1901e3f 100644 --- a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml +++ b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml @@ -24,6 +24,12 @@ properties: compatible: const: linaro,optee-tz + interrupts: + maxItems: 1 + description: | + This interrupt which is used to signal an event by the secure world + software is expected to be edge-triggered. + method: enum: [smc, hvc] description: | @@ -46,6 +52,7 @@ examples: optee { compatible = "linaro,optee-tz"; method = "smc"; + interrupts = <0 187 1>; }; }; From patchwork Wed Oct 6 07:15:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Wiklander X-Patchwork-Id: 12538775 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 6D865C433EF for ; Wed, 6 Oct 2021 07:18:57 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3964561100 for ; Wed, 6 Oct 2021 07:18:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3964561100 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=sE70lEnp4+d9XvD4hbYzIUazpFziEZHZGB9dg4ab5s0=; b=DSOGP7Din5I9FL MjI2yhbsokvcLG/mvLoI130SELa1g/O3I42n9jJB4srFLw788KhN7x9NoaMNd8pHmGiYDmtENibc5 DK+/3iKfRYDFspherNguuayUHVX12QJr8q+CzG01W2DdAI7CLhH0+rEmW7TLOrSTZWh0CHhk1jal6 n+sMsh71KKvR77d7UlhPFRKXTsQ8CG5zbmxeXK6axs0smgakpfoYS1dX76q1IiFUm6XJL70NmtDGf phvheDCKdZ+9bIDjGpvhx8QISqZu0LOFM1bTXL3lrJm+e86Je1SBYCEJkS/OnBoqCBFgJ8SeMzuD3 aQRI0gEJgrpqkstkuU5g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY1Af-00DAmr-2q; Wed, 06 Oct 2021 07:16:57 +0000 Received: from mail-lf1-x12e.google.com ([2a00:1450:4864:20::12e]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY19l-00DAWj-UO for linux-arm-kernel@lists.infradead.org; Wed, 06 Oct 2021 07:16:03 +0000 Received: by mail-lf1-x12e.google.com with SMTP id i24so6198013lfj.13 for ; Wed, 06 Oct 2021 00:16:01 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=JoodeoEbWA8KFPSDaqBt6HBmf+JeOe0hbWt7ocF/yag=; b=qLQ1B0XbhoR27QcdtLieBrU3iXl/MRVIKP5D+RBZ+zZI3rpJ4YAduePW5RAFnMwWtY IzEcaXV+jq4nTwZ+78yRdxll/2yB5fGI1CZm6guqkVNAAo8jFXzkSBjSIpEHgu9oxNmQ 49tF/YrA8FI8qxxUZe5jfdLb+vOfb85XExNYT2CwvyQhMkTlSRNgATXtlzrgemmWMgPv n4Mio/t9meJCoefgGLDjvz6t+pm/4OmRhtUJFNLfxmVvZDZqzXjpKANqxeZZejuEgbqT vm8ulcvGC2myrRHg/oRsoPVz/A2MBngKMXxTI89DwAXP+fhpIYflXufqInSgXEJsG2Qb 1t/g== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=JoodeoEbWA8KFPSDaqBt6HBmf+JeOe0hbWt7ocF/yag=; b=Msk9uG+L4Om3lr9rQHIJM1LofFeYeU2zySF1X16zm29fvl1mX6+CRL4W7GNCdUEzM8 wnwiehCkLQgsxPZFAbVav+iCJ7+Vkae8P02AzuTrCjSFeovFdRkTLvndgixmLUciT3WZ Cw22cNnzsSjlAMT8oyznIWpbv+ixQwSkLq9FwOSkqxDkBe6MTgEXsfePRnuh6I89jMP1 N4fMzJFLeRbmMdBTMbzLrLEpDwgFaGYd39BSDRA5qcBUG1Y2bwz80a4FpRuzw54D8EBk h4bTBTa7Di6LlhcYavg0aQK0U70AEFv5FNx7iBoG5Vh3c8bPdEzcaC37AiYOVAj44iOV FDfw== X-Gm-Message-State: AOAM5303bB16deyN1+iczQkbKgNydCZ9N2QFiJ6F2eWLR1BF2sMV4MJQ qD/vTvqY6DGdjeQ051shi3BGoQ== X-Google-Smtp-Source: ABdhPJx8JCV8rcwVFwjsP9B+UkHcLTmCs0PuzEQqQFbB4E7Z32nm6qHW8yNbtzF1LVXtIqs45hUj4g== X-Received: by 2002:ac2:4285:: with SMTP id m5mr7719567lfh.343.1633504559560; Wed, 06 Oct 2021 00:15:59 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.15.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:15:59 -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 3/6] tee: fix put order in teedev_close_context() Date: Wed, 6 Oct 2021 09:15:43 +0200 Message-Id: <20211006071546.2540920-4-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211006071546.2540920-1-jens.wiklander@linaro.org> References: <20211006071546.2540920-1-jens.wiklander@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211006_001602_083033_E79D2549 X-CRM114-Status: GOOD ( 12.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Prior to this patch was teedev_close_context() calling tee_device_put() before teedev_ctx_put() leading to teedev_ctx_release() accessing ctx->teedev just after the reference counter was decreased on the teedev. Fix this by calling teedev_ctx_put() before tee_device_put(). Fixes: 217e0250cccb ("tee: use reference counting for tee_context") Signed-off-by: Jens Wiklander Reviewed-by: Sumit Garg --- drivers/tee/tee_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index 2b37bc408fc3..85102d12d716 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -98,8 +98,10 @@ void teedev_ctx_put(struct tee_context *ctx) static void teedev_close_context(struct tee_context *ctx) { - tee_device_put(ctx->teedev); + struct tee_device *teedev = ctx->teedev; + teedev_ctx_put(ctx); + tee_device_put(teedev); } static int tee_open(struct inode *inode, struct file *filp) From patchwork Wed Oct 6 07:15:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Wiklander X-Patchwork-Id: 12538777 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 730ADC433F5 for ; Wed, 6 Oct 2021 07:19:21 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3479D61100 for ; Wed, 6 Oct 2021 07:19:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3479D61100 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BfhoYi4whA+p2S2lgb8nOY8ek+YmQkKC5XGp+jn9HUw=; b=MRex5dV276mHFR Wa755/XSYuoeEps4C55DBg5jjw76tM6hHapOgJgptcArCK2N6a8ocfcVZbASYMrlfVOAS82giugWE erU3KXxkJTLqcOzCrWNLUJPtgaypLCgRKhXpQjbsYorhPv7wTx+Uh+bhtTlGVMKfhzwIow+u2kB4j D65lb7X+xQFzE032sZhFITNCAj5kArqSfdOcS9FcvdpUjetlxYHFE2ZhIm+//SR5yKuLbv7RKL2aQ FpUdZaksDiCVYdUrCnZCJmD7p05NSLETwvDqDVf45B3yygfRxHtU+2M9gkrnqrv1GIdvLCEiPlrXh CiIAX1jjmKIAUL8P2kKQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY1B2-00DAu3-Aj; Wed, 06 Oct 2021 07:17:20 +0000 Received: from mail-lf1-x12e.google.com ([2a00:1450:4864:20::12e]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY19l-00DAWz-UZ for linux-arm-kernel@lists.infradead.org; Wed, 06 Oct 2021 07:16:03 +0000 Received: by mail-lf1-x12e.google.com with SMTP id m3so6425412lfu.2 for ; Wed, 06 Oct 2021 00:16:01 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=G+uudF1elXgj2CYRAAhjhZzuZ2zqS9rHSGsbl2nlFFY=; b=RlM9lc7CB9JdOyTQ4MpXfKSPDtGKS7wFz07culpDMMYoAgsdu5TTGdBFAeBRwSyUCG LmRMkPZx4wKMMiZf5EDQvcgc3fLPj5mddxFnmakv9nn5aUpsMZNtxZaHemqAvkyWYWzt UWXjxQUZl7A0FVdws0zCpBxPtuHQOA5BhL4FHOXrqM9vWKK9lFpA6HqYwTHtwLlzAZD7 YCMDlm/XgTs6xmlJqFo3UJF567VMi5q7267KLROyK0Q/SFsToG8Rue7mDEhVnOYW89R5 ZIYb1RXmcao6GHNGHfXQHTt1HJC0hYLH2ME6DAWwk77ORxAKqzo/I2GrxuUI5qm5ujNk /61g== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=G+uudF1elXgj2CYRAAhjhZzuZ2zqS9rHSGsbl2nlFFY=; b=7pzV5shx+bAdxTJDeLix5+8QUp0NmprU+m5psniNx+RP2iOlBnVyOGCLAnAuPUS59w AaCyxj/XY4FOf8RnYJK3p4Al7XothD41vAAT3WmuEUcT/58CKk4Vf70pbRQoi2xXkq2u O5ne0TKFwOJSUnZUdKHhdyt5Cdryn3o9+KOEBqnZtKYof1EzCd1u/AD2kAJ7CvlvxH7j Hp4Sy7Ys/CYlwswpfFAZpN3UcGj0i72lgylTEzBRpz3vJzSFgkjMnAQ4ywcirO4qAWN+ vWoqic6V3lUGAAygCJLN6zq/6jhXTeaMaa17tJPD26RiR0PaYjSMOI5YfrqUbzzIFy4a vVbw== X-Gm-Message-State: AOAM533frQngxdRcJZMIyk7uLud66Wj2nwc6/tHyZESoHcrcCkHEnMja M8CQTflDwEH7yHgbDr5ME6a6vuTqA46zww== X-Google-Smtp-Source: ABdhPJwf2FRNpTOXAY89XLRF5kXnJJw701ler3rWnJUuAKx7wE4mqyW0rOll/wLKeBRqtPuTgFgqEA== X-Received: by 2002:a2e:a791:: with SMTP id c17mr26518748ljf.509.1633504560446; Wed, 06 Oct 2021 00:16:00 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.15.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:16:00 -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 4/6] tee: export teedev_open() and teedev_close_context() Date: Wed, 6 Oct 2021 09:15:44 +0200 Message-Id: <20211006071546.2540920-5-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211006071546.2540920-1-jens.wiklander@linaro.org> References: <20211006071546.2540920-1-jens.wiklander@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211006_001602_074603_53AC97E2 X-CRM114-Status: GOOD ( 15.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Exports the two functions teedev_open() and teedev_close_context() in order to make it easier to create a driver internal struct tee_context. Signed-off-by: Jens Wiklander Reviewed-by: Sumit Garg --- drivers/tee/tee_core.c | 6 ++++-- include/linux/tee_drv.h | 14 ++++++++++++++ 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index 85102d12d716..3fc426dad2df 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -43,7 +43,7 @@ static DEFINE_SPINLOCK(driver_lock); static struct class *tee_class; static dev_t tee_devt; -static struct tee_context *teedev_open(struct tee_device *teedev) +struct tee_context *teedev_open(struct tee_device *teedev) { int rc; struct tee_context *ctx; @@ -70,6 +70,7 @@ static struct tee_context *teedev_open(struct tee_device *teedev) return ERR_PTR(rc); } +EXPORT_SYMBOL_GPL(teedev_open); void teedev_ctx_get(struct tee_context *ctx) { @@ -96,13 +97,14 @@ void teedev_ctx_put(struct tee_context *ctx) kref_put(&ctx->refcount, teedev_ctx_release); } -static void teedev_close_context(struct tee_context *ctx) +void teedev_close_context(struct tee_context *ctx) { struct tee_device *teedev = ctx->teedev; teedev_ctx_put(ctx); tee_device_put(teedev); } +EXPORT_SYMBOL_GPL(teedev_close_context); static int tee_open(struct inode *inode, struct file *filp) { diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h index 3ebfea0781f1..26f42c4cd7a1 100644 --- a/include/linux/tee_drv.h +++ b/include/linux/tee_drv.h @@ -582,4 +582,18 @@ struct tee_client_driver { #define to_tee_client_driver(d) \ container_of(d, struct tee_client_driver, driver) +/** + * teedev_open() - Open a struct tee_device + * @teedev: Device to open + * + * @return a pointer to struct tee_context on success or an ERR_PTR on failure. + */ +struct tee_context *teedev_open(struct tee_device *teedev); + +/** + * teedev_close_context() - closes a struct tee_context + * @ctx: The struct tee_context to close + */ +void teedev_close_context(struct tee_context *ctx); + #endif /*__TEE_DRV_H*/ From patchwork Wed Oct 6 07:15:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Wiklander X-Patchwork-Id: 12538779 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 0438FC433F5 for ; Wed, 6 Oct 2021 07:20:14 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 C2D9760FD9 for ; Wed, 6 Oct 2021 07:20:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C2D9760FD9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8qB6cfecThL6RwqBRn72xF5eELQYZyI3PCWiAyTIvak=; b=Cni80xvKg0l7az 0qXRef2NQe3JIUQ7FcWPFqsJDgKYEsdyoa+DcDGf6Ls30c2nwwQRbHcrgGJjScp7FgHuaLn8jr/4x eq26WLBuNgvB0nxDym5bFHGBi+TphoBWnS9FCmpoCUAsb/jZbj2prZuCMMk0+2xWckmO4iAhNQ3tH 6utTBVJQHCUn+BW6PtVrn2pyek5tA6YF0kJSVWGFinPkgGEkEn+VgH8LwzvQj4bwk2VB3gWTGRgk/ idwhk/iw02DFJpIgxjN1UODthTdxYDdm/XVruezmVc+V78F2rjz3ETUf1Ux534g/LyDosw9wgErWC 2zRy+33Zj8bD3EtXLx8A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY1BU-00DB40-NE; Wed, 06 Oct 2021 07:17:49 +0000 Received: from mail-lf1-x131.google.com ([2a00:1450:4864:20::131]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY19n-00DAXj-4B for linux-arm-kernel@lists.infradead.org; Wed, 06 Oct 2021 07:16:06 +0000 Received: by mail-lf1-x131.google.com with SMTP id i24so6198320lfj.13 for ; Wed, 06 Oct 2021 00:16:02 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=XK8Sdkqxly1oUw1aMlNCOwYBPYx0+ngCF8/a3huLQbY=; b=T+86KlYlKNpaaEU6srwbMONeUDSZ1pdcERtp15toosu1emUomz/q+ijZjgr2u1t6pi qb9UvwrEq84OD41MhUXs8ONo30PwNmWpEl9RCQbzmZXTK+GF5ouEIoZbd6oLig9/4l4B dP2/vuR/PwEX9DAQ5oVe7eLSOEBhTp5+Ev43Pkmhj5UeVQp4EVhWIFZ1OpdnlihaTvTZ H14jj019vPQhi5Ba+fOu6p6Xadb7XCBxfCvWpo+GXz307mn31E7cs7zBuymz9t2kZN/A DQakQ+NoOE70Dl4bdGLYF4AUZa2aqHdTPC38KftoMy/gj8Epe/E1dWnKfVzduiOxXEmu KPKQ== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=XK8Sdkqxly1oUw1aMlNCOwYBPYx0+ngCF8/a3huLQbY=; b=7o/njuqWMsJPtSgh0JJG0BfjlAOSKFip7g3aykZy9EoS8cvxDbosEt4qPEOoNo7DHl PBRRuzXPonNUiYeah/V5wYPtlt9xO5LpBEuC9IpyLHNfIg49825JXrQbSDpZq7ITqHRh mOlMoF+80laUJK6S1E0fgBSdMTPNseYz7sls94+FVMkJaZC65HaKUOmozjbeDzud/KEa vHzhNmKhUtzssgqsI6JJtv5R26TO901EPSi/ferKCYf4seRGX+v3wHKtB27ypBLkn3o3 hBS59r6k1xlzt5T/uzT+jMC4wvf7hyLabe3NQX4nmT1retMlkBXifZnNpkBPd3DGdvXs NZ/g== X-Gm-Message-State: AOAM5339JpXFJbHSbEy2acepvbETh+r422uKDb79EYIC2bIsLGfI1xho t/SXJabSWuYkuzDaNMYrxfGAUw== X-Google-Smtp-Source: ABdhPJzJb+7p8L56VwhhxfDjTAUFmoDEWLBeucjWTsHgOjbrIjwqysoIBqeMnmtDfkHNRNwKQiXoUg== X-Received: by 2002:a2e:8011:: with SMTP id j17mr26619606ljg.145.1633504561360; Wed, 06 Oct 2021 00:16:01 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.16.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:16:01 -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 5/6] optee: separate notification functions Date: Wed, 6 Oct 2021 09:15:45 +0200 Message-Id: <20211006071546.2540920-6-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211006071546.2540920-1-jens.wiklander@linaro.org> References: <20211006071546.2540920-1-jens.wiklander@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211006_001603_287844_00B6C579 X-CRM114-Status: GOOD ( 37.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Renames struct optee_wait_queue to struct optee_notif and all related functions to optee_notif_*(). The implementation is changed to allow sending a notification from an atomic state, that is from the top half of an interrupt handler. Waiting for keys is currently only used when secure world is waiting for a mutex or condition variable. The old implementation could handle any 32-bit key while this new implementation is restricted to only 8 bits or the maximum value 255. A upper value is needed since a bitmap is allocated to allow an interrupt handler to only set a bit in case the waiter hasn't had the time yet to allocate and register a completion. The keys are currently only representing secure world threads which number usually are never even close to 255 so it should be safe for now. In future ABI updates the maximum value of the key will be communicated while the driver is initializing. Signed-off-by: Jens Wiklander Reviewed-by: Sumit Garg --- drivers/tee/optee/Makefile | 1 + drivers/tee/optee/core.c | 12 ++- drivers/tee/optee/notif.c | 125 ++++++++++++++++++++++++++++++ drivers/tee/optee/optee_private.h | 19 +++-- drivers/tee/optee/optee_rpc_cmd.h | 31 ++++---- drivers/tee/optee/rpc.c | 73 ++--------------- 6 files changed, 170 insertions(+), 91 deletions(-) create mode 100644 drivers/tee/optee/notif.c diff --git a/drivers/tee/optee/Makefile b/drivers/tee/optee/Makefile index 3aa33ea9e6a6..df55e4ad5370 100644 --- a/drivers/tee/optee/Makefile +++ b/drivers/tee/optee/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_OPTEE) += optee.o optee-objs += core.o optee-objs += call.o +optee-objs += notif.o optee-objs += rpc.o optee-objs += supp.o optee-objs += shm_pool.o diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index 5ce13b099d7d..8531184f98f4 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -592,6 +592,7 @@ static int optee_remove(struct platform_device *pdev) */ optee_disable_shm_cache(optee); + optee_notif_uninit(optee); /* * The two devices have to be unregistered before we can free the * other resources. @@ -602,7 +603,6 @@ static int optee_remove(struct platform_device *pdev) tee_shm_pool_free(optee->pool); if (optee->memremaped_shm) memunmap(optee->memremaped_shm); - optee_wait_queue_exit(&optee->wait_queue); optee_supp_uninit(&optee->supp); mutex_destroy(&optee->call_queue.mutex); @@ -712,11 +712,17 @@ static int optee_probe(struct platform_device *pdev) mutex_init(&optee->call_queue.mutex); INIT_LIST_HEAD(&optee->call_queue.waiters); - optee_wait_queue_init(&optee->wait_queue); optee_supp_init(&optee->supp); optee->memremaped_shm = memremaped_shm; optee->pool = pool; + platform_set_drvdata(pdev, optee); + rc = optee_notif_init(optee, 255); + if (rc) { + optee_remove(pdev); + return rc; + } + /* * Ensure that there are no pre-existing shm objects before enabling * the shm cache so that there's no chance of receiving an invalid @@ -731,8 +737,6 @@ static int optee_probe(struct platform_device *pdev) if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) pr_info("dynamic shared memory is enabled\n"); - platform_set_drvdata(pdev, optee); - rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES); if (rc) { optee_remove(pdev); diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c new file mode 100644 index 000000000000..a28fa03dcd0e --- /dev/null +++ b/drivers/tee/optee/notif.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2015-2021, Linaro Limited + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include "optee_private.h" + +struct notif_entry { + struct list_head link; + struct completion c; + u_int key; +}; + +static bool have_key(struct optee *optee, u_int key) +{ + struct notif_entry *entry; + + list_for_each_entry(entry, &optee->notif.db, link) + if (entry->key == key) + return true; + + return false; +} + +int optee_notif_wait(struct optee *optee, u_int key) +{ + unsigned long flags; + struct notif_entry *entry; + int rc = 0; + + if (key > optee->notif.max_key) + return -EINVAL; + + entry = kmalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return -ENOMEM; + init_completion(&entry->c); + entry->key = key; + + spin_lock_irqsave(&optee->notif.lock, flags); + + /* + * If the bit is already set it means that the key has already + * been posted and we must not wait. + */ + if (test_bit(key, optee->notif.bitmap)) { + clear_bit(key, optee->notif.bitmap); + goto out; + } + + /* + * Check if someone is already waiting for this key. If there is + * it's a programming error. + */ + if (have_key(optee, key)) { + rc = -EBUSY; + goto out; + } + + list_add_tail(&entry->link, &optee->notif.db); + + /* + * Unlock temporarily and wait for completion. + */ + spin_unlock_irqrestore(&optee->notif.lock, flags); + wait_for_completion(&entry->c); + spin_lock_irqsave(&optee->notif.lock, flags); + + list_del(&entry->link); +out: + spin_unlock_irqrestore(&optee->notif.lock, flags); + + kfree(entry); + + return rc; +} + +int optee_notif_send(struct optee *optee, u_int key) +{ + unsigned long flags; + struct notif_entry *entry; + + if (key > optee->notif.max_key) + return -EINVAL; + + spin_lock_irqsave(&optee->notif.lock, flags); + + list_for_each_entry(entry, &optee->notif.db, link) + if (entry->key == key) { + complete(&entry->c); + goto out; + } + + /* Only set the bit in case there where nobody waiting */ + set_bit(key, optee->notif.bitmap); +out: + spin_unlock_irqrestore(&optee->notif.lock, flags); + + return 0; +} + +int optee_notif_init(struct optee *optee, u_int max_key) +{ + spin_lock_init(&optee->notif.lock); + INIT_LIST_HEAD(&optee->notif.db); + optee->notif.bitmap = bitmap_zalloc(max_key, GFP_KERNEL); + if (!optee->notif.bitmap) + return -ENOMEM; + + optee->notif.max_key = max_key; + + return 0; +} + +void optee_notif_uninit(struct optee *optee) +{ + kfree(optee->notif.bitmap); +} diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index dbdd367be156..76a16d9b6cf4 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -35,10 +35,12 @@ struct optee_call_queue { struct list_head waiters; }; -struct optee_wait_queue { - /* Serializes access to this struct */ - struct mutex mu; +struct optee_notif { + u_int max_key; + /* Serializes access to the elements below in this struct */ + spinlock_t lock; struct list_head db; + u_long *bitmap; }; /** @@ -72,8 +74,7 @@ struct optee_supp { * @teedev: client device * @invoke_fn: function to issue smc or hvc * @call_queue: queue of threads waiting to call @invoke_fn - * @wait_queue: queue of threads from secure world waiting for a - * secure world sync object + * @notif: notification synchronization struct * @supp: supplicant synchronization struct for RPC to supplicant * @pool: shared memory pool * @memremaped_shm virtual address of memory in shared memory pool @@ -88,7 +89,7 @@ struct optee { struct tee_device *teedev; optee_invoke_fn *invoke_fn; struct optee_call_queue call_queue; - struct optee_wait_queue wait_queue; + struct optee_notif notif; struct optee_supp supp; struct tee_shm_pool *pool; void *memremaped_shm; @@ -131,8 +132,10 @@ void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param, struct optee_call_ctx *call_ctx); void optee_rpc_finalize_call(struct optee_call_ctx *call_ctx); -void optee_wait_queue_init(struct optee_wait_queue *wq); -void optee_wait_queue_exit(struct optee_wait_queue *wq); +int optee_notif_init(struct optee *optee, u_int max_key); +void optee_notif_uninit(struct optee *optee); +int optee_notif_wait(struct optee *optee, u_int key); +int optee_notif_send(struct optee *optee, u_int key); u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params, struct tee_param *param); diff --git a/drivers/tee/optee/optee_rpc_cmd.h b/drivers/tee/optee/optee_rpc_cmd.h index b8275140cef8..f3f06e0994a7 100644 --- a/drivers/tee/optee/optee_rpc_cmd.h +++ b/drivers/tee/optee/optee_rpc_cmd.h @@ -28,24 +28,27 @@ #define OPTEE_RPC_CMD_GET_TIME 3 /* - * Wait queue primitive, helper for secure world to implement a wait queue. + * Notification from/to secure world. * - * If secure world needs to wait for a secure world mutex it issues a sleep - * request instead of spinning in secure world. Conversely is a wakeup - * request issued when a secure world mutex with a thread waiting thread is - * unlocked. + * If secure world needs to wait for something, for instance a mutex, it + * does a notification wait request instead of spinning in secure world. + * Conversely can a synchronous notification can be sent when a secure + * world mutex with a thread waiting thread is unlocked. * - * Waiting on a key - * [in] value[0].a OPTEE_RPC_WAIT_QUEUE_SLEEP - * [in] value[0].b Wait key + * This interface can also be used to wait for a asynchronous notification + * which instead is sent via a non-secure interrupt. * - * Waking up a key - * [in] value[0].a OPTEE_RPC_WAIT_QUEUE_WAKEUP - * [in] value[0].b Wakeup key + * Waiting on notification + * [in] value[0].a OPTEE_RPC_NOTIFICATION_WAIT + * [in] value[0].b notification value + * + * Sending a synchronous notification + * [in] value[0].a OPTEE_RPC_NOTIFICATION_SEND + * [in] value[0].b notification value */ -#define OPTEE_RPC_CMD_WAIT_QUEUE 4 -#define OPTEE_RPC_WAIT_QUEUE_SLEEP 0 -#define OPTEE_RPC_WAIT_QUEUE_WAKEUP 1 +#define OPTEE_RPC_CMD_NOTIFICATION 4 +#define OPTEE_RPC_NOTIFICATION_WAIT 0 +#define OPTEE_RPC_NOTIFICATION_SEND 1 /* * Suspend execution diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c index efbaff7ad7e5..fa492655843a 100644 --- a/drivers/tee/optee/rpc.c +++ b/drivers/tee/optee/rpc.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (c) 2015-2016, Linaro Limited + * Copyright (c) 2015-2021, Linaro Limited */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -14,23 +14,6 @@ #include "optee_smc.h" #include "optee_rpc_cmd.h" -struct wq_entry { - struct list_head link; - struct completion c; - u32 key; -}; - -void optee_wait_queue_init(struct optee_wait_queue *priv) -{ - mutex_init(&priv->mu); - INIT_LIST_HEAD(&priv->db); -} - -void optee_wait_queue_exit(struct optee_wait_queue *priv) -{ - mutex_destroy(&priv->mu); -} - static void handle_rpc_func_cmd_get_time(struct optee_msg_arg *arg) { struct timespec64 ts; @@ -143,48 +126,6 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx, } #endif -static struct wq_entry *wq_entry_get(struct optee_wait_queue *wq, u32 key) -{ - struct wq_entry *w; - - mutex_lock(&wq->mu); - - list_for_each_entry(w, &wq->db, link) - if (w->key == key) - goto out; - - w = kmalloc(sizeof(*w), GFP_KERNEL); - if (w) { - init_completion(&w->c); - w->key = key; - list_add_tail(&w->link, &wq->db); - } -out: - mutex_unlock(&wq->mu); - return w; -} - -static void wq_sleep(struct optee_wait_queue *wq, u32 key) -{ - struct wq_entry *w = wq_entry_get(wq, key); - - if (w) { - wait_for_completion(&w->c); - mutex_lock(&wq->mu); - list_del(&w->link); - mutex_unlock(&wq->mu); - kfree(w); - } -} - -static void wq_wakeup(struct optee_wait_queue *wq, u32 key) -{ - struct wq_entry *w = wq_entry_get(wq, key); - - if (w) - complete(&w->c); -} - static void handle_rpc_func_cmd_wq(struct optee *optee, struct optee_msg_arg *arg) { @@ -196,11 +137,13 @@ static void handle_rpc_func_cmd_wq(struct optee *optee, goto bad; switch (arg->params[0].u.value.a) { - case OPTEE_RPC_WAIT_QUEUE_SLEEP: - wq_sleep(&optee->wait_queue, arg->params[0].u.value.b); + case OPTEE_RPC_NOTIFICATION_WAIT: + if (optee_notif_wait(optee, arg->params[0].u.value.b)) + goto bad; break; - case OPTEE_RPC_WAIT_QUEUE_WAKEUP: - wq_wakeup(&optee->wait_queue, arg->params[0].u.value.b); + case OPTEE_RPC_NOTIFICATION_SEND: + if (optee_notif_send(optee, arg->params[0].u.value.b)) + goto bad; break; default: goto bad; @@ -463,7 +406,7 @@ static void handle_rpc_func_cmd(struct tee_context *ctx, struct optee *optee, case OPTEE_RPC_CMD_GET_TIME: handle_rpc_func_cmd_get_time(arg); break; - case OPTEE_RPC_CMD_WAIT_QUEUE: + case OPTEE_RPC_CMD_NOTIFICATION: handle_rpc_func_cmd_wq(optee, arg); break; case OPTEE_RPC_CMD_SUSPEND: From patchwork Wed Oct 6 07:15:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Wiklander X-Patchwork-Id: 12538781 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 C52FAC433F5 for ; Wed, 6 Oct 2021 07:20:26 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 93AA460FD9 for ; Wed, 6 Oct 2021 07:20:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 93AA460FD9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oZKDDwju4UrpEoRo41vPJDwaB50CoMhZ0/Q1yqjINn4=; b=wmcpHsrprhPcAN drddGj0Z9XSYQ1AhlJE5iLo69zgQYpcEyoSn+iinp8vD6pKVQ2t49+adOBJQIiXWeII8yWbHntz6j I5TIkbCnA20oYFczC2wGlVlNiP0fe7PBM2AKKOyQiGA0vd05KhQqb2NrEPR+fFWRyrMS6Y9UYaosY uuTpU0kMUbQlpR52Z7GDVLf9lHPI3bgGYyWL2BzbwhVDHEF4YvJqC8xo241MXnhVAHgIgOyJC81Ze oEsJMYzF3+cIXY0Oc5oKhYCH4MG3tDXNhkRS+F8wB6pDS7g2aoluweytvwOKrfEUePHaZetd9ul1u M2thn5l0rE03sGTkePVA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY1By-00DBHJ-Hi; Wed, 06 Oct 2021 07:18:19 +0000 Received: from mail-lf1-x136.google.com ([2a00:1450:4864:20::136]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mY19o-00DAYG-Ib for linux-arm-kernel@lists.infradead.org; Wed, 06 Oct 2021 07:16:07 +0000 Received: by mail-lf1-x136.google.com with SMTP id b20so6408123lfv.3 for ; Wed, 06 Oct 2021 00:16:03 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=wAtKHq4H00PYy1G0w9yieAUi0yX7ljL7tXh/Gj7mew8=; b=aYbhecr1wmqo382b7EvdQxEOHyidCuQGMBETNTKigvGXXACteUZGEq4RgOzX95S3gv VS2QD6ekN5P9OVpW8dNWnLzDjZq1CMlrmrOivTUA8auy5ndY5hvCuaiB1JMFOqe0GqlF A+yTlKG6rLxKIhFnyUQSfxRI/F3ZZh06M2TyonznqGi8WB0twn8cf4STLdrvGmqMFZWT uFelRcPu3tKovrILbLKbl/3ZfZT0UKAk9r3ZCEtdbHh8Szu6IYxE3qRhG+/bs/LX0Txf afJk4b026EfWeRflJWE12+qWpveSL6rzeXrITbHJ5dfHBhy6SLwNfqzRuuNrhwS+u2rA LiYg== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=wAtKHq4H00PYy1G0w9yieAUi0yX7ljL7tXh/Gj7mew8=; b=2ybZD2a+GoKbS41il/bEHlnx7y7UBYyhhx6EMP+D6AZFwwjv7C28aJi0IgumyXu8h3 tLSBeawbWooanZC4GtUS7WGPXRTuD2/zPKYdci0FFMPr0S7pK91ZICGNKWmjCKTqisR/ NMYQBTc5NnwQEYiMcA18AoairnjjgL54TBsR2PqDwpepV/aZ8hMGogprSwDpb4r0MslS G/M25/Ve4AAtEC+GJDyvSLExeyAJ3+/xFewfauoFNp+HZXz+xQmeORMQ0O9eud3VHiMd fHS+cjmiLWvBpog5jLlwKX3uclixHsqKbrcOoyEcxYf9a+L35yeVqx4Kq73Acko977iy HXGQ== X-Gm-Message-State: AOAM533/EVd5dWaJ6IX6npv88X/ZRt55R6xGYYCu+fsVAEzzNpWnb4BQ HX7gWLk7WnWASMYXayXG+a7F5w== X-Google-Smtp-Source: ABdhPJwFf4s2+U9+FnzXionkLOSGfCzwj/IfFbIt3+sE5adbEhaUaQGK3OVg4jCUElnaGUxlPYXwRw== X-Received: by 2002:ac2:4427:: with SMTP id w7mr7861784lfl.470.1633504562283; Wed, 06 Oct 2021 00:16:02 -0700 (PDT) Received: from jade.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id y7sm960376lfk.143.2021.10.06.00.16.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Oct 2021 00:16:02 -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 6/6] optee: add asynchronous notifications Date: Wed, 6 Oct 2021 09:15:46 +0200 Message-Id: <20211006071546.2540920-7-jens.wiklander@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211006071546.2540920-1-jens.wiklander@linaro.org> References: <20211006071546.2540920-1-jens.wiklander@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211006_001604_689662_2BCD63D0 X-CRM114-Status: GOOD ( 30.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adds support for asynchronous notifications from secure world to normal world. 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. The protocol is defined in optee_msg.h optee_rpc_cmd.h and optee_smc.h. A notification consists of a 32-bit value which normal world can retrieve using a fastcall into secure world. The value OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF (0) has a special meaning. When this value is sent it means that normal world is supposed to make a yielding call OPTEE_MSG_CMD_DO_BOTTOM_HALF. Notification capability is negotiated while the driver is initialized. If both sides supports these notifications then they are enabled. An interrupt is used to notify the driver that there are asynchronous notifications pending. The maximum needed notification value is communicated at this stage. This allows scaling up when needed. Acked-by: Ard Biesheuvel Signed-off-by: Jens Wiklander --- drivers/tee/optee/call.c | 27 ++++++++ drivers/tee/optee/core.c | 83 ++++++++++++++++------- drivers/tee/optee/notif.c | 109 ++++++++++++++++++++++++++++-- drivers/tee/optee/optee_msg.h | 9 +++ drivers/tee/optee/optee_private.h | 6 +- drivers/tee/optee/optee_smc.h | 75 +++++++++++++++++++- 6 files changed, 277 insertions(+), 32 deletions(-) diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index 945f03da0223..e428e0e9a3af 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -392,6 +392,33 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session) return 0; } +static int simple_call_with_arg(struct tee_context *ctx, u32 cmd) +{ + struct optee_msg_arg *msg_arg; + phys_addr_t msg_parg; + struct tee_shm *shm; + + shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg); + if (IS_ERR(shm)) + return PTR_ERR(shm); + + msg_arg->cmd = cmd; + optee_do_call_with_arg(ctx, msg_parg); + + tee_shm_free(shm); + return 0; +} + +int optee_do_bottom_half(struct tee_context *ctx) +{ + return simple_call_with_arg(ctx, OPTEE_MSG_CMD_DO_BOTTOM_HALF); +} + +int optee_stop_async_notif(struct tee_context *ctx) +{ + return simple_call_with_arg(ctx, OPTEE_MSG_CMD_STOP_ASYNC_NOTIF); +} + /** * optee_enable_shm_cache() - Enables caching of some shared memory allocation * in OP-TEE diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index 8531184f98f4..ccafd7151b45 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -8,9 +8,12 @@ #include #include #include +#include #include +#include #include #include +#include #include #include #include @@ -355,6 +358,17 @@ static const struct tee_desc optee_supp_desc = { .flags = TEE_DESC_PRIVILEGED, }; +static int enable_async_notif(optee_invoke_fn *invoke_fn) +{ + struct arm_smccc_res res; + + invoke_fn(OPTEE_SMC_ENABLE_ASYNC_NOTIF, 0, 0, 0, 0, 0, 0, 0, &res); + + if (res.a0) + return -EINVAL; + return 0; +} + static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn) { struct arm_smccc_res res; @@ -404,7 +418,7 @@ static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn) } static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn, - u32 *sec_caps) + u32 *sec_caps, u32 *max_notif_value) { union { struct arm_smccc_res smccc; @@ -427,6 +441,7 @@ static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn, return false; *sec_caps = res.result.capabilities; + *max_notif_value = res.result.max_notif_value; return true; } @@ -630,6 +645,7 @@ static int optee_probe(struct platform_device *pdev) struct optee *optee = NULL; void *memremaped_shm = NULL; struct tee_device *teedev; + u32 max_notif_value; u32 sec_caps; int rc; @@ -659,7 +675,8 @@ static int optee_probe(struct platform_device *pdev) return -EINVAL; } - if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) { + if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps, + &max_notif_value)) { pr_warn("capabilities mismatch\n"); return -EINVAL; } @@ -682,7 +699,7 @@ static int optee_probe(struct platform_device *pdev) optee = kzalloc(sizeof(*optee), GFP_KERNEL); if (!optee) { rc = -ENOMEM; - goto err; + goto err_free_pool; } optee->invoke_fn = invoke_fn; @@ -691,24 +708,24 @@ static int optee_probe(struct platform_device *pdev) teedev = tee_device_alloc(&optee_desc, NULL, pool, optee); if (IS_ERR(teedev)) { rc = PTR_ERR(teedev); - goto err; + goto err_free_optee; } optee->teedev = teedev; teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee); if (IS_ERR(teedev)) { rc = PTR_ERR(teedev); - goto err; + goto err_unreg_teedev; } optee->supp_teedev = teedev; rc = tee_device_register(optee->teedev); if (rc) - goto err; + goto err_unreg_supp_teedev; rc = tee_device_register(optee->supp_teedev); if (rc) - goto err; + goto err_unreg_supp_teedev; mutex_init(&optee->call_queue.mutex); INIT_LIST_HEAD(&optee->call_queue.waiters); @@ -717,10 +734,31 @@ static int optee_probe(struct platform_device *pdev) optee->pool = pool; platform_set_drvdata(pdev, optee); - rc = optee_notif_init(optee, 255); - if (rc) { - optee_remove(pdev); - return rc; + + if (sec_caps & OPTEE_SMC_SEC_CAP_ASYNC_NOTIF) { + unsigned int irq; + + rc = platform_get_irq(pdev, 0); + if (rc < 0) { + pr_err("platform_get_irq: ret %d\n", rc); + goto err_unreg_supp_teedev; + } + irq = rc; + + rc = optee_notif_init(optee, max_notif_value, irq); + if (rc) { + irq_dispose_mapping(irq); + optee_remove(pdev); + return rc; + } + enable_async_notif(optee->invoke_fn); + pr_info("Asynchronous notifications enabled\n"); + } else { + rc = optee_notif_init(optee, 255, 0); + if (rc) { + optee_remove(pdev); + return rc; + } } /* @@ -745,20 +783,15 @@ static int optee_probe(struct platform_device *pdev) pr_info("initialized driver\n"); return 0; -err: - if (optee) { - /* - * tee_device_unregister() is safe to call even if the - * devices hasn't been registered with - * tee_device_register() yet. - */ - tee_device_unregister(optee->supp_teedev); - tee_device_unregister(optee->teedev); - kfree(optee); - } - if (pool) - tee_shm_pool_free(pool); - if (memremaped_shm) +err_unreg_supp_teedev: + tee_device_unregister(optee->supp_teedev); +err_unreg_teedev: + tee_device_unregister(optee->teedev); +err_free_optee: + kfree(optee); +err_free_pool: + tee_shm_pool_free(pool); + if (optee->memremaped_shm) memunmap(memremaped_shm); return rc; } diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c index a28fa03dcd0e..2c888ad87451 100644 --- a/drivers/tee/optee/notif.c +++ b/drivers/tee/optee/notif.c @@ -7,10 +7,14 @@ #include #include +#include +#include #include #include #include #include "optee_private.h" +#include "optee_smc.h" +#include "optee_rpc_cmd.h" struct notif_entry { struct list_head link; @@ -18,6 +22,54 @@ struct notif_entry { u_int key; }; +static u32 get_async_notif_value(optee_invoke_fn *invoke_fn, bool *value_valid, + bool *value_pending) +{ + struct arm_smccc_res res; + + invoke_fn(OPTEE_SMC_GET_ASYNC_NOTIF_VALUE, 0, 0, 0, 0, 0, 0, 0, &res); + + if (res.a0) + return 0; + *value_valid = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID); + *value_pending = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING); + return res.a1; +} + +static irqreturn_t notif_irq_handler(int irq, void *dev_id) +{ + struct optee *optee = dev_id; + bool do_bottom_half = false; + bool value_valid; + bool value_pending; + u32 value; + + do { + value = get_async_notif_value(optee->invoke_fn, &value_valid, + &value_pending); + if (!value_valid) + break; + + if (value == OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF) + do_bottom_half = true; + else + optee_notif_send(optee, value); + } while (value_pending); + + if (do_bottom_half) + return IRQ_WAKE_THREAD; + return IRQ_HANDLED; +} + +static irqreturn_t notif_irq_thread_fn(int irq, void *dev_id) +{ + struct optee *optee = dev_id; + + optee_do_bottom_half(optee->notif.ctx); + + return IRQ_HANDLED; +} + static bool have_key(struct optee *optee, u_int key) { struct notif_entry *entry; @@ -106,20 +158,69 @@ int optee_notif_send(struct optee *optee, u_int key) return 0; } -int optee_notif_init(struct optee *optee, u_int max_key) +int optee_notif_init(struct optee *optee, u_int max_key, u_int irq) { + struct tee_context *ctx; + int rc; + + if (irq) { + ctx = teedev_open(optee->teedev); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + optee->notif.ctx = ctx; + } + spin_lock_init(&optee->notif.lock); INIT_LIST_HEAD(&optee->notif.db); optee->notif.bitmap = bitmap_zalloc(max_key, GFP_KERNEL); - if (!optee->notif.bitmap) - return -ENOMEM; - + if (!optee->notif.bitmap) { + rc = -ENOMEM; + goto err_close_ctx; + } optee->notif.max_key = max_key; + if (irq) { + rc = request_threaded_irq(irq, notif_irq_handler, + notif_irq_thread_fn, + 0, "optee_notification", optee); + if (rc) + goto err_free_bitmap; + + optee->notif.irq = irq; + } + return 0; + +err_free_bitmap: + kfree(optee->notif.bitmap); +err_close_ctx: + teedev_close_context(optee->notif.ctx); + optee->notif.ctx = NULL; + + return rc; } void optee_notif_uninit(struct optee *optee) { + if (optee->notif.ctx) { + optee_stop_async_notif(optee->notif.ctx); + if (optee->notif.irq) { + free_irq(optee->notif.irq, optee); + irq_dispose_mapping(optee->notif.irq); + } + + /* + * The thread normally working with optee->notif.ctx was + * stopped with free_irq() above. + * + * Note we're not using teedev_close_context() or + * tee_client_close_context() since we have already called + * tee_device_put() while initializing to avoid a circular + * reference counting. + */ + teedev_close_context(optee->notif.ctx); + } + kfree(optee->notif.bitmap); } diff --git a/drivers/tee/optee/optee_msg.h b/drivers/tee/optee/optee_msg.h index e3d72d09c484..3e09c8386e46 100644 --- a/drivers/tee/optee/optee_msg.h +++ b/drivers/tee/optee/optee_msg.h @@ -293,6 +293,13 @@ struct optee_msg_arg { * [in] param[0].u.rmem.shm_ref holds shared memory reference * [in] param[0].u.rmem.offs 0 * [in] param[0].u.rmem.size 0 + * + * OPTEE_MSG_CMD_DO_BOTTOM_HALF does the scheduled bottom half processing + * of a driver. + * + * OPTEE_MSG_CMD_STOP_ASYNC_NOTIF informs secure world that from now is + * normal world unable to process asynchronous notifications. Typically + * used when the driver is shut down. */ #define OPTEE_MSG_CMD_OPEN_SESSION 0 #define OPTEE_MSG_CMD_INVOKE_COMMAND 1 @@ -300,6 +307,8 @@ struct optee_msg_arg { #define OPTEE_MSG_CMD_CANCEL 3 #define OPTEE_MSG_CMD_REGISTER_SHM 4 #define OPTEE_MSG_CMD_UNREGISTER_SHM 5 +#define OPTEE_MSG_CMD_DO_BOTTOM_HALF 6 +#define OPTEE_MSG_CMD_STOP_ASYNC_NOTIF 7 #define OPTEE_MSG_FUNCID_CALL_WITH_ARG 0x0004 #endif /* _OPTEE_MSG_H */ diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index 76a16d9b6cf4..f62a16935c49 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -37,6 +37,8 @@ struct optee_call_queue { struct optee_notif { u_int max_key; + unsigned int irq; + struct tee_context *ctx; /* Serializes access to the elements below in this struct */ spinlock_t lock; struct list_head db; @@ -132,7 +134,7 @@ void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param, struct optee_call_ctx *call_ctx); void optee_rpc_finalize_call(struct optee_call_ctx *call_ctx); -int optee_notif_init(struct optee *optee, u_int max_key); +int optee_notif_init(struct optee *optee, u_int max_key, u_int irq); void optee_notif_uninit(struct optee *optee); int optee_notif_wait(struct optee *optee, u_int key); int optee_notif_send(struct optee *optee, u_int key); @@ -159,6 +161,8 @@ int optee_close_session(struct tee_context *ctx, u32 session); int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg, struct tee_param *param); int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session); +int optee_do_bottom_half(struct tee_context *ctx); +int optee_stop_async_notif(struct tee_context *ctx); void optee_enable_shm_cache(struct optee *optee); void optee_disable_shm_cache(struct optee *optee); diff --git a/drivers/tee/optee/optee_smc.h b/drivers/tee/optee/optee_smc.h index 80eb763a8a80..c6eec6b6febf 100644 --- a/drivers/tee/optee/optee_smc.h +++ b/drivers/tee/optee/optee_smc.h @@ -107,6 +107,12 @@ struct optee_smc_call_get_os_revision_result { /* * Call with struct optee_msg_arg as argument * + * When calling this function normal world has a few responsibilities: + * 1. It must be able to handle eventual RPCs + * 2. Non-secure interrupts should not be masked + * 3. If asynchronous notifications has be negotiated successfully, then + * asynchronous notifications should be unmasked during this call. + * * Call register usage: * a0 SMC Function ID, OPTEE_SMC*CALL_WITH_ARG * a1 Upper 32 bits of a 64-bit physical pointer to a struct optee_msg_arg @@ -195,7 +201,8 @@ struct optee_smc_get_shm_config_result { * Normal return register usage: * a0 OPTEE_SMC_RETURN_OK * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_* - * a2-7 Preserved + * a2 The maximum secure world notification number + * a3-7 Preserved * * Error return register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world @@ -218,6 +225,8 @@ struct optee_smc_get_shm_config_result { #define OPTEE_SMC_SEC_CAP_VIRTUALIZATION BIT(3) /* Secure world supports Shared Memory with a NULL reference */ #define OPTEE_SMC_SEC_CAP_MEMREF_NULL BIT(4) +/* Secure world supports asynchronous notification of normal world */ +#define OPTEE_SMC_SEC_CAP_ASYNC_NOTIF BIT(5) #define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES 9 #define OPTEE_SMC_EXCHANGE_CAPABILITIES \ @@ -226,8 +235,8 @@ struct optee_smc_get_shm_config_result { struct optee_smc_exchange_capabilities_result { unsigned long status; unsigned long capabilities; + unsigned long max_notif_value; unsigned long reserved0; - unsigned long reserved1; }; /* @@ -319,6 +328,68 @@ struct optee_smc_disable_shm_cache_result { #define OPTEE_SMC_GET_THREAD_COUNT \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_THREAD_COUNT) +/* + * Inform OP-TEE that normal world is able to receive asynchronous + * notifications. + * + * Call requests usage: + * a0 SMC Function ID, OPTEE_SMC_ENABLE_ASYNC_NOTIF + * a1-6 Not used + * a7 Hypervisor Client ID register + * + * Normal return register usage: + * a0 OPTEE_SMC_RETURN_OK + * a1-7 Preserved + * + * Not supported return register usage: + * a0 OPTEE_SMC_RETURN_ENOTAVAIL + * a1-7 Preserved + */ +#define OPTEE_SMC_FUNCID_ENABLE_ASYNC_NOTIF 16 +#define OPTEE_SMC_ENABLE_ASYNC_NOTIF \ + OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_ASYNC_NOTIF) + +/* + * Retrieve a value of notifications pended since the last call of this + * function. + * + * OP-TEE keeps a records of all posted values. When an interrupts is + * received which indicates that there are posed values this function + * should be called until all pended values has been retrieved. When a + * value is retrieved it's cleared from the record in secure world. + * + * Call requests usage: + * a0 SMC Function ID, OPTEE_SMC_GET_ASYNC_NOTIF_VALUE + * a1-6 Not used + * a7 Hypervisor Client ID register + * + * Normal return register usage: + * a0 OPTEE_SMC_RETURN_OK + * a1 value + * a2 Bit[0]: OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID if the value in a1 is + * valid, else 0 if no values where pending + * a2 Bit[1]: OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING if another value is + * pending, else 0. + * Bit[31:2]: MBZ + * a3-7 Preserved + * + * Not supported return register usage: + * a0 OPTEE_SMC_RETURN_ENOTAVAIL + * a1-7 Preserved + */ +#define OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID BIT(0) +#define OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING BIT(1) + +/* + * Notification that OP-TEE expects a yielding call to do some bottom half + * work in a driver. + */ +#define OPTEE_SMC_ASYNC_NOTIF_VALUE_DO_BOTTOM_HALF 0 + +#define OPTEE_SMC_FUNCID_GET_ASYNC_NOTIF_VALUE 17 +#define OPTEE_SMC_GET_ASYNC_NOTIF_VALUE \ + OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_ASYNC_NOTIF_VALUE) + /* * Resume from RPC (for example after processing a foreign interrupt) *