From nobody Thu Dec 18 05:56:09 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53079E7AD56 for ; Tue, 3 Oct 2023 14:07:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232312AbjJCOHN (ORCPT ); Tue, 3 Oct 2023 10:07:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237996AbjJCOHL (ORCPT ); Tue, 3 Oct 2023 10:07:11 -0400 Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7C5AAF for ; Tue, 3 Oct 2023 07:07:07 -0700 (PDT) Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 393A7Dgf022752; Tue, 3 Oct 2023 16:06:51 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= selector1; bh=U4vOdxSVlfELSeNY+vE9G1cuY4dw0I2hF391/hYQ6S0=; b=Zm xKyRlusO9cW0t9nMM5vjA/OLmoubXMVe281sYtDf6Wya/zUime6fD6zJ9bOGP2fE NRsqcJEyqXVm0ydD90RBQbJZvHWJu4fyKEfhQBIrAuybNiLP4H6FUVWPzXYCpZsf 7V5dpWK/NYl4pr79x+QhMiC4S/SG+PZdt99bkTmMrjWFvMJuRNDQI6/CTfVAv20q 7D/ToxEvzmg4g8Sy7FHFvCUdhL7ppE1EBs2y1Ntcp+WFGIyD4FnceL5DReRjeqlC kt857D9Q8H0lU7nEtFZ0nNHAeChDrS9nHXLjX9pCCtkTdugtCIQ/yUVhUzMZ79q/ 4yYrSPfqHfMfJHoT9/oQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3tggx31460-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 03 Oct 2023 16:06:51 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 0AD44100057; Tue, 3 Oct 2023 16:06:49 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id D731F2634FA; Tue, 3 Oct 2023 16:06:49 +0200 (CEST) Received: from localhost (10.201.20.20) by SHFDAG1NODE1.st.com (10.75.129.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Tue, 3 Oct 2023 16:06:49 +0200 From: Etienne Carriere To: CC: Jens Wiklander , Sumit Garg , , , Jerome Forissier , Etienne Carriere , Sudeep Holla , Cristian Marussi Subject: [PATCH v10 4/4] firmware: arm_scmi: optee: use optee system invocation Date: Tue, 3 Oct 2023 16:06:37 +0200 Message-ID: <20231003140637.31346-5-etienne.carriere@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231003140637.31346-1-etienne.carriere@foss.st.com> References: <20231003140637.31346-1-etienne.carriere@foss.st.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.201.20.20] X-ClientProxiedBy: SHFCAS1NODE2.st.com (10.75.129.73) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-03_11,2023-10-02_01,2023-05-22_02 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Changes SCMI optee transport to call tee_client_system_session() to request optee driver to provision an entry context in OP-TEE for processing OP-TEE messages. This prevents possible deadlock in case OP-TEE threads are all consumed while these may be waiting for a clock or regulator to be enable which SCMI OP-TEE service which requires a free thread context to execute. Cc: Sudeep Holla Cc: Cristian Marussi Acked-by: Sudeep Holla Reviewed-by: Sumit Garg Signed-off-by: Etienne Carriere --- Changes since v9: - Applied Sumit R-b tag: https://lore.kernel.org/lkml/CAFA6WYMyJrW25sdZRkQHDje72+tLDw4T+bjB6tmVf8X= H0De1RQ@mail.gmail.com/ - Added Cc: tags and updated my e-mail address. No change since v8 No change since v7 No change since v6 Changes since v5: - Applied Sudeep's review tag Changes since v4: - Updated to new API function tee_client_system_session() introduced in patch v5 2/3. No change since v3 Changes since v2: - Fixed syntax issues (missing ';' chars), reported by kernel test robot. Changes since v1: - Updated to use new tee API functions tee_client_request_system_context() and tee_client_release_system_context(). --- drivers/firmware/arm_scmi/optee.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/firmware/arm_scmi/optee.c b/drivers/firmware/arm_scmi/= optee.c index e123de6e8c67..25bfb465484d 100644 --- a/drivers/firmware/arm_scmi/optee.c +++ b/drivers/firmware/arm_scmi/optee.c @@ -440,6 +440,10 @@ static int scmi_optee_chan_setup(struct scmi_chan_info= *cinfo, struct device *de if (ret) goto err_free_shm; =20 + ret =3D tee_client_system_session(scmi_optee_private->tee_ctx, channel->t= ee_session); + if (ret) + dev_warn(dev, "Could not switch to system session, do best effort\n"); + ret =3D get_channel(channel); if (ret) goto err_close_sess; --=20 2.25.1