From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 30 Jun 2025 10:06:29 +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 1uW9X3-00CYdH-0I for lore@lore.pengutronix.de; Mon, 30 Jun 2025 10:06:29 +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 1uW9X2-0006Rw-8n for lore@pengutronix.de; Mon, 30 Jun 2025 10:06:29 +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:To:In-Reply-To:References: Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=uTLMLBwcPuWN7lowJSTMEQV81hFdS23l+49W/BdzlA0=; b=GM42DuVY278iS67JuWWr+iAYAH 8hRfacjyunuFroHOpIm0Ayl6V/meVa7epeH7/mUJLM8NQ8d+QfsLmn1FXrj4js8wQT+mYYN6NYWdY zgi+mPVhhqTwYMM5p4Ou2HMMLFqFEfSF0invBRktBVpv0Pb9MhJQIbs+vynBcjPKXlel8M2OEeZYU szXxoqihFXnMJaoW14P9sIi2mDc7F5JGTn998HmaDTzeCg4j7gdKiVKh0OKpd/pJ/SOF1yRDP9fmA t3VoWDK0v4FIVYTDHjW1BC33kzQfDezw3wf4vtaE/Eah0KP7GKP02/OmZJ/hdwAqwKa7YuViQcicy dNnsaxeg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uW9WY-00000001Z1I-1lI3; Mon, 30 Jun 2025 08:05:58 +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 1uW9VR-00000001Ykd-2y87 for barebox@lists.infradead.org; Mon, 30 Jun 2025 08:04:50 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1uW9VQ-0004sI-K7; Mon, 30 Jun 2025 10:04:48 +0200 Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1uW9VQ-0064Qp-1N; Mon, 30 Jun 2025 10:04:48 +0200 Received: from localhost ([::1] helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1uW9D2-004Sjo-0Z; Mon, 30 Jun 2025 09:45:48 +0200 From: Sascha Hauer Date: Mon, 30 Jun 2025 09:45:52 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250630-arm-optee-early-helper-v2-10-c8cce3ae42b0@pengutronix.de> References: <20250630-arm-optee-early-helper-v2-0-c8cce3ae42b0@pengutronix.de> In-Reply-To: <20250630-arm-optee-early-helper-v2-0-c8cce3ae42b0@pengutronix.de> To: BAREBOX X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1751269548; l=2566; i=s.hauer@pengutronix.de; s=20230412; h=from:subject:message-id; bh=/IInaGSNfuQyuWwkyxxwe9JEWkhG6V+l7KrpMlBlur4=; b=oFlCbhr7ZuNVTyZBQ1HNnJkTQVFVEM6WZY1VY+Tza21Bd/6ZPLv4aw3cPVuL9mOlGrLFqLwVW yEoZDzjqM+rCiLNC67uf+uGRxhunHpcNiKE6Wsap25oz1SFGyecxmfI X-Developer-Key: i=s.hauer@pengutronix.de; a=ed25519; pk=4kuc9ocmECiBJKWxYgqyhtZOHj5AWi7+d0n/UjhkwTg= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250630_010449_756061_85426611 X-CRM114-Status: GOOD ( 11.77 ) 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=-5.3 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v2 10/14] ARM: i.MX: add imx6_can_access_tzasc() 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) On ARMv7 there is no direct way to detect if we are in the secure or non secure world. Add a imx6_can_access_tzasc() for this purpose. When accessing the TZASC triggers a data abort then we are in the non secure world, because OP-TEE configures the CSU to forbid accesses to the TZASC from the normal world. This function can be used later to detect if we have to load OP-TEE or not. We'll need CONFIG_ARM_EXCEPTIONS_PBL for this functionality, so select this symbol in Kconfig. Signed-off-by: Sascha Hauer --- arch/arm/mach-imx/Kconfig | 1 + arch/arm/mach-imx/tzasc.c | 13 +++++++++++++ include/mach/imx/tzasc.h | 1 + 3 files changed, 15 insertions(+) diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index bb6bad169831b03879527ef9f676ff99b955a6fd..38ef55727678855591bf41cecca76947434381e8 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -50,6 +50,7 @@ config ARCH_IMX_TZASC bool depends on ARCH_IMX6 || ARCH_IMX8M default y if PBL_OPTEE + select ARM_EXCEPTIONS_PBL # # PMIC configuration found on i.MX51 Babbadge board diff --git a/arch/arm/mach-imx/tzasc.c b/arch/arm/mach-imx/tzasc.c index ed20ad8803a2e91b67b5d8c3ab1a4265c4228ec7..0fe7f6eb7f4ac67b6db63ee78b5fc867d17df9cc 100644 --- a/arch/arm/mach-imx/tzasc.c +++ b/arch/arm/mach-imx/tzasc.c @@ -13,6 +13,8 @@ #include #include #include +#include +#include /******************************************************************************* * TZC380 defines @@ -329,6 +331,17 @@ bool imx6ul_tzc380_is_bypassed(void) return !(readl(&gpr[9]) & MX6_GPR_TZASC1_EN); } +bool imx6_can_access_tzasc(void) +{ + arm_pbl_init_exceptions(); + + data_abort_mask(); + + readl(IOMEM(MX6_TZASC1_BASE)); + + return !data_abort_unmask(); +} + void imx8m_tzc380_init(void) { u32 __iomem *gpr = IOMEM(MX8M_IOMUXC_GPR_BASE_ADDR); diff --git a/include/mach/imx/tzasc.h b/include/mach/imx/tzasc.h index 0fbcdc2150e63864366a8dddeed2d1b97685903d..ca85704a8f459ab6e0cdc975940d855929f3d6f7 100644 --- a/include/mach/imx/tzasc.h +++ b/include/mach/imx/tzasc.h @@ -10,6 +10,7 @@ void imx6q_tzc380_early_ns_region1(void); void imx6ul_tzc380_early_ns_region1(void); bool imx6q_tzc380_is_bypassed(void); bool imx6ul_tzc380_is_bypassed(void); +bool imx6_can_access_tzasc(void); void imx8m_tzc380_init(void); bool imx8m_tzc380_is_enabled(void); -- 2.39.5