From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 840B23E5EC6 for ; Fri, 3 Jul 2026 14:37:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783089459; cv=none; b=SmXTvNDhW0WaGbSisFFyE9azVSJCNE7QDSezhLoEigz0RX6PD4V5F9/HrWgSV1kLrH3rRSYKh59I+ZPQcc2aRk3LII4oHxPD7MnNvjNEltVYZBhqozWa0gVXO+N+/kJ+ZCyKXOjuxvFi/h9SP/IqWexs6Gp0s5zF7FPlEcRALH4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783089459; c=relaxed/simple; bh=1s5f9ZEBwPtcJPWTHyMkxLJItT7aIW8Q7OLfpx4Z8GU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Cu9dkVZgMqFduQVBFNn4EcnV0OtSprooBFbGnbGZytyg1jW3giIN+7Ah4qEJq8RdLO9CQd+RnBiRu/OGrTZQ0QidwXxdOtiiXKIt5YJiFNXqCT8o5nITSoATNc4r6/Vi/EjdyDTvm91+U3y0W3ZjvZ9tSwie/Ot+D0oNML9ffPg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=AV3tR8t1; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="AV3tR8t1" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id C8E281A0E1A; Fri, 3 Jul 2026 14:37:33 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 9D87F60300; Fri, 3 Jul 2026 14:37:33 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 4D857104C952E; Fri, 3 Jul 2026 16:37:31 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1783089452; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=zMfJd1B0NhyQvY4yeAEZmcciy7C5a48PemMKXj9rAho=; b=AV3tR8t13IiDQnSHdNJ4djftX5wGo1pBWkeooc3ciWHccNNIJfhzMUcZejasnaK5gTa1KS dbGYWPo96X/ahcalxS3P2zXw9ekxodrFtPi9iz+P8EQKaK+pjwVULb+pm8ooOqZH0FVGd/ YmJLldBvKc7/QYb9iIE16x8uAL5K8IBt6M5IXbrS55ir0Jes9UxazGz+g5jUZ0ldY45yEu 72OFRGAzDkYNAXj8Zo4hG4hilIGhPu13kDaAwRpiapar2zwQSodvce3jiU58KtHt86ehU+ M7OWeDJowZc8a32C8SFo5RDjrTQVs3rzrwwc03itlBwdWWre/Hpcdl6ZBnyRuQ== From: "Richard Genoud (TI)" To: Nishanth Menon , Vignesh Raghavendra Cc: Tero Kristo , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Udit Kumar , Abhash Kumar , Beleswar Padhi , Thomas Richard , Gregory CLEMENT , Thomas Petazzoni , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 3/6] arm64: dts: ti: k3-j721s2-ti-ipc-firmware: Reserve memory for LPM metadata Date: Fri, 3 Jul 2026 16:37:14 +0200 Message-ID: <20260703143717.177362-4-richard.genoud@bootlin.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260703143717.177362-1-richard.genoud@bootlin.com> References: <20260703143717.177362-1-richard.genoud@bootlin.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 Declare a carveout memory region to store LPM metadata on J721S2. For Jacinto devices, this memory region is needed for saving ATF context and the certificate information of ATF and OPTEE and DM image. This LPM metadata area is firewalled to be accessed only by TIFS. U-Boot R5 SPL/TIFS will use this area to save and restore: - ATF context - ATF certificate information - OPTEE certificate information - DM image (which has been copied in memory at boot time by U-Boot R5-SPL) At resume, U-Boot R5 SPL is executed and detects that the board is resuming (with a flag set in the PMIC), then it: - brings out of retention the DDR - retrieves the LPM memory region from DTS - authenticates certificates from LPM memory region and applies firewalls - asks TIFS to restore TFA and its own minimal context - starts TFA on remote proc - loads back DM image from memory and jumps to DM https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/pm/lpm.html#lpm-msg-lpm-save-addr As this is used by U-Boot SPL, bootph-pre-ram is added. NB: This memory region is not part of DM memory (which is not retained at suspend) Signed-off-by: Prasanth Babu Mantena Signed-off-by: Richard Genoud (TI) --- .../arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi index 5253d028da09..010d20d56927 100644 --- a/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j721s2-ti-ipc-firmware.dtsi @@ -95,6 +95,12 @@ rtos_ipc_memory_region: memory@a8000000 { alignment = <0x1000>; no-map; }; + + lpm_memory_region: memory@a9c00000 { + reg = <0x00 0xa9c00000 0x00 0x00300000>; + no-map; + bootph-pre-ram; + }; }; &mailbox0_cluster0 { @@ -189,8 +195,10 @@ &mcu_r5fss0 { &mcu_r5fss0_core0 { mboxes = <&mailbox0_cluster0 &mbox_mcu_r5fss0_core0>; memory-region = <&mcu_r5fss0_core0_dma_memory_region>, - <&mcu_r5fss0_core0_memory_region>; - memory-region-names = "dma", "firmware"; + <&mcu_r5fss0_core0_memory_region>, + <&lpm_memory_region>; + memory-region-names = "dma", "firmware", "lpm-metadata"; + bootph-pre-ram; status = "okay"; }; -- 2.47.3