From patchwork Thu Jun 13 09:12:23 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Courbot X-Patchwork-Id: 251019 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id F2E552C00A9 for ; Thu, 13 Jun 2013 19:14:01 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758486Ab3FMJNm (ORCPT ); Thu, 13 Jun 2013 05:13:42 -0400 Received: from hqemgate04.nvidia.com ([216.228.121.35]:7032 "EHLO hqemgate04.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758475Ab3FMJNi (ORCPT ); Thu, 13 Jun 2013 05:13:38 -0400 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate04.nvidia.com id ; Thu, 13 Jun 2013 02:13:16 -0700 Received: from hqemhub03.nvidia.com ([172.20.12.94]) by hqnvupgp07.nvidia.com (PGP Universal service); Thu, 13 Jun 2013 02:11:51 -0700 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Thu, 13 Jun 2013 02:11:51 -0700 Received: from percival.nvidia.com (172.20.144.16) by hqemhub03.nvidia.com (172.20.150.15) with Microsoft SMTP Server (TLS) id 8.3.298.1; Thu, 13 Jun 2013 02:13:01 -0700 From: Alexandre Courbot To: Stephen Warren , Joseph Lo , Karan Jhavar , Varun Wadekar , Chris Johnson , Matthew Longnecker , Russell King - ARM Linux , Tomasz Figa , Dave Martin , Jassi Brar CC: , , , , , Alexandre Courbot Subject: [PATCH v2 1/3] ARM: tegra: basic support for Trusted Foundations Date: Thu, 13 Jun 2013 18:12:23 +0900 Message-ID: <1371114745-24710-2-git-send-email-acourbot@nvidia.com> X-Mailer: git-send-email 1.8.3 In-Reply-To: <1371114745-24710-1-git-send-email-acourbot@nvidia.com> References: <1371114745-24710-1-git-send-email-acourbot@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Add basic support for booting secondary processors on Tegra devices using the Trusted Foundations secure monitor. Signed-off-by: Alexandre Courbot --- Documentation/devicetree/bindings/arm/tegra.txt | 11 +++++ .../devicetree/bindings/vendor-prefixes.txt | 1 + arch/arm/configs/tegra_defconfig | 1 + arch/arm/mach-tegra/Kconfig | 14 ++++++ arch/arm/mach-tegra/Makefile | 3 ++ arch/arm/mach-tegra/common.c | 2 + arch/arm/mach-tegra/firmware.c | 40 +++++++++++++++++ arch/arm/mach-tegra/firmware.h | 19 ++++++++ arch/arm/mach-tegra/trusted_foundations.c | 51 ++++++++++++++++++++++ 9 files changed, 142 insertions(+) create mode 100644 arch/arm/mach-tegra/firmware.c create mode 100644 arch/arm/mach-tegra/firmware.h create mode 100644 arch/arm/mach-tegra/trusted_foundations.c diff --git a/Documentation/devicetree/bindings/arm/tegra.txt b/Documentation/devicetree/bindings/arm/tegra.txt index ed9c853..d59bc19 100644 --- a/Documentation/devicetree/bindings/arm/tegra.txt +++ b/Documentation/devicetree/bindings/arm/tegra.txt @@ -32,3 +32,14 @@ board-specific compatible values: nvidia,whistler toradex,colibri_t20-512 toradex,iris + +Optional nodes +------------------------------------------- + +Trusted Foundations: +Boards using the Trusted Foundations secure monitor should signal its +presence by declaring a node compatible with "tl,trusted-foundations": + + firmware { + compatible = "tl,trusted-foundations"; + }; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 6931c43..c21e1e9 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -58,6 +58,7 @@ st STMicroelectronics ste ST-Ericsson stericsson ST-Ericsson ti Texas Instruments +tl Trusted Logic toshiba Toshiba Corporation via VIA Technologies, Inc. wlf Wolfson Microelectronics diff --git a/arch/arm/configs/tegra_defconfig b/arch/arm/configs/tegra_defconfig index 4de3bce..3bf158a 100644 --- a/arch/arm/configs/tegra_defconfig +++ b/arch/arm/configs/tegra_defconfig @@ -28,6 +28,7 @@ CONFIG_ARCH_TEGRA_3x_SOC=y CONFIG_ARCH_TEGRA_114_SOC=y CONFIG_TEGRA_PCI=y CONFIG_TEGRA_EMC_SCALING_ENABLE=y +CONFIG_TEGRA_TRUSTED_FOUNDATIONS=y CONFIG_SMP=y CONFIG_PREEMPT=y CONFIG_AEABI=y diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig index 84d72fc..055f496 100644 --- a/arch/arm/mach-tegra/Kconfig +++ b/arch/arm/mach-tegra/Kconfig @@ -87,4 +87,18 @@ config TEGRA_AHB config TEGRA_EMC_SCALING_ENABLE bool "Enable scaling the memory frequency" +config TEGRA_TRUSTED_FOUNDATIONS + bool "Trusted Foundations secure monitor support" + help + Many Tegra devices are booted with the Trusted Foundations secure + monitor active, requiring some core operations to be performed by + the secure monitor instead of the kernel. + + This option allows the kernel to invoke the secure monitor when + required on devices using Trusted Foundations. + + Devices using Trusted Foundations should pass a device tree containing + a node compatible with "tl,trusted-foundations" to signal the presence + of the secure monitor. + endmenu diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile index d011f0a..9fdc004 100644 --- a/arch/arm/mach-tegra/Makefile +++ b/arch/arm/mach-tegra/Makefile @@ -12,6 +12,7 @@ obj-y += pm.o obj-y += reset.o obj-y += reset-handler.o obj-y += sleep.o +obj-y += firmware.o obj-y += tegra.o obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o @@ -37,3 +38,5 @@ endif obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += board-harmony-pcie.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += board-paz00.o + +obj-$(CONFIG_TEGRA_TRUSTED_FOUNDATIONS) += trusted_foundations.o diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c index 9f852c6..4796bb0 100644 --- a/arch/arm/mach-tegra/common.c +++ b/arch/arm/mach-tegra/common.c @@ -37,6 +37,7 @@ #include "sleep.h" #include "pm.h" #include "reset.h" +#include "firmware.h" /* * Storage for debug-macro.S's state. @@ -97,6 +98,7 @@ static void __init tegra_init_cache(void) void __init tegra_init_early(void) { + tegra_init_firmware(); tegra_cpu_reset_handler_init(); tegra_apb_io_init(); tegra_init_fuse(); diff --git a/arch/arm/mach-tegra/firmware.c b/arch/arm/mach-tegra/firmware.c new file mode 100644 index 0000000..ea861ca --- /dev/null +++ b/arch/arm/mach-tegra/firmware.c @@ -0,0 +1,40 @@ +/* + * SecureOS support for Tegra CPUs + * + * Copyright (c) 2013, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include +#include +#include +#include + +#if IS_ENABLED(CONFIG_TEGRA_TRUSTED_FOUNDATIONS) +extern const struct firmware_ops tegra_trusted_foundations_ops; +#endif + +void __init tegra_init_firmware(void) +{ + struct device_node *node; + + if (!of_have_populated_dt()) + return; + + node = of_find_compatible_node(NULL, NULL, "tl,trusted-foundations"); + if (node && !IS_ENABLED(CONFIG_TEGRA_TRUSTED_FOUNDATIONS)) + pr_warn("Trusted Foundations detected but support missing!\n"); +#if IS_ENABLED(CONFIG_TEGRA_TRUSTED_FOUNDATIONS) + else if (node) + register_firmware_ops(&tegra_trusted_foundations_ops); +#endif +} diff --git a/arch/arm/mach-tegra/firmware.h b/arch/arm/mach-tegra/firmware.h new file mode 100644 index 0000000..77c62fb --- /dev/null +++ b/arch/arm/mach-tegra/firmware.h @@ -0,0 +1,19 @@ +/* + * Copyright (c) 2013, NVIDIA Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef __TEGRA_FIRMWARE_H +#define __TEGRA_FIRMWARE_H + +void tegra_init_firmware(void); + +#endif diff --git a/arch/arm/mach-tegra/trusted_foundations.c b/arch/arm/mach-tegra/trusted_foundations.c new file mode 100644 index 0000000..411044f --- /dev/null +++ b/arch/arm/mach-tegra/trusted_foundations.c @@ -0,0 +1,51 @@ +/* + * SecureOS support for Tegra CPUs + * + * Copyright (c) 2013, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include +#include +#include +#include + +#define TF_SET_CPU_BOOT_ADDR_SMC 0xfffff200 + +static void __attribute__((naked)) tegra_tf_generic_smc(u32 type, u32 subtype, + u32 arg) +{ + asm volatile( + ".arch_extension sec\n\t" + "stmfd sp!, {r3 - r11, lr}\n\t" + __asmeq("%0", "r0") + __asmeq("%1", "r1") + __asmeq("%2", "r2") + "mov r3, #0\n\t" + "mov r4, #0\n\t" + "smc #0\n\t" + "ldmfd sp!, {r3 - r11, pc}" + : + : "r" (type), "r" (subtype), "r" (arg) + : "memory"); +} + +static int tegra_tf_set_cpu_boot_addr(int cpu, unsigned long boot_addr) +{ + tegra_tf_generic_smc(TF_SET_CPU_BOOT_ADDR_SMC, boot_addr, 0); + + return 0; +} + +const struct firmware_ops tegra_trusted_foundations_ops = { + .set_cpu_boot_addr = tegra_tf_set_cpu_boot_addr, +};