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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 21B6CC433EF for ; Fri, 3 Jun 2022 12:16:45 +0000 (UTC) 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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5oMccFd1PGXKxYpXk45b0pYh4wbjvcArQyr/bwCLoKE=; b=ttQe2FrdtiujLD drSRHQqThiqvUarD/QPQs8uvduR6vtAZX2yvQ6fXdl/czosmSPLzXyRhzkV0P4saFP1mggVuRkPX6 ewTCVZYZxMu9A1k2+EXtwa5qlrixcUbpG9mRtTa2ro4vV6H8VaAa39YsrhORpIqMvaDp9HP5/v2mS q3qiQEkrwr1gHIaxc6ts3dcB1mOLCQexdw12pf7R2gLcbx06Jqr1r5ONJ92sn5/GuHdIdruGBLmZ8 6fHYd/nALygUSRQxz9NRSXpsN+BDXhZ2ATC3pa36ioXi9jZCP5btuCNrx9PYJ8ODQqaLxc6OCTMY4 XYblOuSs+p2vMnHjlTQg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nx6DJ-007LdQ-8e; Fri, 03 Jun 2022 12:15:37 +0000 Received: from lelv0143.ext.ti.com ([198.47.23.248]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nx6DF-007LcI-D1 for linux-arm-kernel@lists.infradead.org; Fri, 03 Jun 2022 12:15:34 +0000 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 253CFTTv122110; Fri, 3 Jun 2022 07:15:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1654258529; bh=4Z/SWcBdgq7gJXZF6aYCxpS+F1uJ0waLtD4QLHJH0F4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=urgzThK/GESeFMPn7ZrCMnYHvnkLI2lYcjjgxk43IXIXOm1QmwyIMEz2DhdcuQAMc XPyfWD8bNAEkvg5/XJ35pbBNXkxIfolsN/NNmx/JW71pQJ0Llt+N/ugvPjmcdzYFiT CH16CA2x94OrfNVEPmbwgPruulFGVinceDaAfIMs= Received: from DFLE101.ent.ti.com (dfle101.ent.ti.com [10.64.6.22]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 253CFTiM031421 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 3 Jun 2022 07:15:29 -0500 Received: from DFLE115.ent.ti.com (10.64.6.36) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Fri, 3 Jun 2022 07:15:28 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE115.ent.ti.com (10.64.6.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Fri, 3 Jun 2022 07:15:28 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 253CFRMM025776; Fri, 3 Jun 2022 07:15:28 -0500 From: Puranjay Mohan To: Subject: [PATCH v4 3/6] remoteproc: pru: Make sysfs entries read-only for PRU client driven boots Date: Fri, 3 Jun 2022 17:45:17 +0530 Message-ID: <20220603121520.13730-4-p-mohan@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220603121520.13730-1-p-mohan@ti.com> References: <20220603121520.13730-1-p-mohan@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220603_051533_626425_59E0414A X-CRM114-Status: GOOD ( 11.92 ) 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: , Cc: nm@ti.com, devicetree@vger.kernel.org, grygorii.strashko@ti.com, vigneshr@ti.com, mathieu.poirier@linaro.org, kishon@ti.com, linux-remoteproc@vger.kernel.org, bjorn.andersson@linaro.org, rogerq@kernel.org, krzysztof.kozlowski+dt@linaro.org, ssantosh@kernel.org, p-mohan@ti.com, robh@kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Suman Anna The PRU remoteproc driver is not configured for 'auto-boot' by default, and allows to be booted either by in-kernel PRU client drivers or by userspace using the generic remoteproc sysfs interfaces. The sysfs interfaces should not be permitted to change the remoteproc firmwares or states when a PRU is being managed by an in-kernel client driver. Use the newly introduced remoteproc generic 'sysfs_read_only' flag to provide these restrictions by setting and clearing it appropriately during the PRU acquire and release steps. Signed-off-by: Suman Anna Co-developed-by: Grzegorz Jaszczyk Signed-off-by: Grzegorz Jaszczyk Signed-off-by: Puranjay Mohan --- drivers/remoteproc/pru_rproc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c index 7a35b400287a..9fed3e0372d3 100644 --- a/drivers/remoteproc/pru_rproc.c +++ b/drivers/remoteproc/pru_rproc.c @@ -231,6 +231,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index, } pru->client_np = np; + rproc->sysfs_read_only = true; mutex_unlock(&pru->lock); @@ -265,6 +266,7 @@ void pru_rproc_put(struct rproc *rproc) } pru->client_np = NULL; + rproc->sysfs_read_only = false; mutex_unlock(&pru->lock); put_device(&rproc->dev); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel