From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 25 Sep 2025 14:26:43 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1v1l3b-000wTt-2L for lore@lore.pengutronix.de; Thu, 25 Sep 2025 14:26:43 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1v1l3b-0006IB-6w for lore@pengutronix.de; Thu, 25 Sep 2025 14:26:43 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:To:From:Reply-To:Cc:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=ravrDyTAW4ElTJCiUw1eBonIB1tvq+ol9c6gxiN58SE=; b=FXrES4v2yS5nwaC6m1XcQfOT5u mVETyzar0vLJVArANgllY0zdLYF8g0fdsGruzxIX4yLxvdV2j+5LnINQNdQ29bjFoR8vUqadZy3wV qRTCVqX0WOMUYO7fpqBzCupm7T8zNo9TI1OkPvcQ6+hfJYYNFoXm0Ltjr1NB8xSaLBJBcspBVZec7 oNFM5KvapOa5PAbP7p/BgLKY2F8tzbxsxi7jNjGC7UMNHR2EerDlC/+sUuwUT9o/coUNgpjDsTGrd gYFaPaPJqgPsv/6haavK5ITPz7b4aPyqNJQABMpfGJ8li/I7yMzi9rx+AYi8PJjpUR1F0cXPM8DR1 OLAKyYIA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v1l33-00000008xD1-1pSi; Thu, 25 Sep 2025 12:26:09 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v1l31-00000008xAO-2yoE for barebox@lists.infradead.org; Thu, 25 Sep 2025 12:26:08 +0000 Received: from dude05.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::54]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1v1l2x-00069z-Rr; Thu, 25 Sep 2025 14:26:03 +0200 From: Philipp Zabel To: barebox@lists.infradead.org Date: Thu, 25 Sep 2025 14:26:03 +0200 Message-ID: <20250925122603.3345276-1-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250925_052607_742957_2B3316B4 X-CRM114-Status: UNSURE ( 9.43 ) X-CRM114-Notice: Please train this message. X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH] ARM: i.MX6: configure AIPS registers only if trusted X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Bail out of AIPS configuration if OP-TEE has cleared the MTW ("master trusted for write access") bit for the ARM core master to lock down AIPS configuration. Signed-off-by: Philipp Zabel --- arch/arm/mach-imx/imx6.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/mach-imx/imx6.c b/arch/arm/mach-imx/imx6.c index ed6cde801ec7..0cf2c17d6b90 100644 --- a/arch/arm/mach-imx/imx6.c +++ b/arch/arm/mach-imx/imx6.c @@ -31,8 +31,16 @@ #define MX6_OCOTP_CFG0 0x410 #define MX6_OCOTP_CFG1 0x420 +#define BM_MPR_MPROT1_MTW (0x1 << 25) + static void imx6_configure_aips(void __iomem *aips) { + u32 mpr = readl(aips); + + /* Bail if CPU ist not trusted for write accesses. */ + if (!(mpr & BM_MPR_MPROT1_MTW)) + return; + /* * Set all MPROTx to be non-bufferable, trusted for R/W, * not forced to user-mode. -- 2.47.3