Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756259Ab3H2J65 (ORCPT ); Thu, 29 Aug 2013 05:58:57 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:19395 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756057Ab3H2J6A (ORCPT ); Thu, 29 Aug 2013 05:58:00 -0400 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Thu, 29 Aug 2013 02:58:00 -0700 From: Alexandre Courbot To: Stephen Warren , Russell King - ARM Linux , Tomasz Figa , Dave Martin CC: , , , , , Alexandre Courbot Subject: [PATCH v4 1/5] ARM: add basic Trusted Foundations support Date: Thu, 29 Aug 2013 18:57:44 +0900 Message-ID: <1377770268-14014-2-git-send-email-acourbot@nvidia.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1377770268-14014-1-git-send-email-acourbot@nvidia.com> References: <1377770268-14014-1-git-send-email-acourbot@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8920 Lines: 273 Trusted Foundations is a TrustZone-based secure monitor for ARM that can be invoked using a consistent smc-based API on all supported platforms. This patch adds initial basic support for Trusted Foundations using the ARM firmware API. Current features are limited to the ability to boot secondary processors. Signed-off-by: Alexandre Courbot --- .../arm/firmware/tl,trusted-foundations.txt | 17 +++++ .../devicetree/bindings/vendor-prefixes.txt | 1 + arch/arm/Kconfig | 2 + arch/arm/Makefile | 1 + arch/arm/firmware/Kconfig | 26 +++++++ arch/arm/firmware/Makefile | 1 + arch/arm/firmware/trusted_foundations.c | 83 ++++++++++++++++++++++ arch/arm/include/asm/trusted_foundations.h | 48 +++++++++++++ 8 files changed, 179 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/firmware/tl,trusted-foundations.txt create mode 100644 arch/arm/firmware/Kconfig create mode 100644 arch/arm/firmware/Makefile create mode 100644 arch/arm/firmware/trusted_foundations.c create mode 100644 arch/arm/include/asm/trusted_foundations.h diff --git a/Documentation/devicetree/bindings/arm/firmware/tl,trusted-foundations.txt b/Documentation/devicetree/bindings/arm/firmware/tl,trusted-foundations.txt new file mode 100644 index 0000000..3954bbd --- /dev/null +++ b/Documentation/devicetree/bindings/arm/firmware/tl,trusted-foundations.txt @@ -0,0 +1,17 @@ +Trusted Foundations + +Boards that use the Trusted Foundations secure monitor can signal its +presence by declaring a node compatible with "tl,trusted-foundations" +under the root node. + +Required properties: +- compatible : "tl,trusted-foundations" +- version-major : major version number of Trusted Foundations firmware +- version-minor: minor version number of Trusted Foundations firmware + +Example: + firmware { + compatible = "tl,trusted-foundations"; + version-major = <2>; + version-minor = <8>; + }; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 366ce9b..20d61f3 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -63,6 +63,7 @@ ste ST-Ericsson stericsson ST-Ericsson toumaz Toumaz ti Texas Instruments +tl Trusted Logic toshiba Toshiba Corporation v3 V3 Semiconductor via VIA Technologies, Inc. diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 43594d5..7fbe800 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1074,6 +1074,8 @@ config ARM_TIMER_SP804 select CLKSRC_MMIO select CLKSRC_OF if OF +source "arch/arm/firmware/Kconfig" + source arch/arm/mm/Kconfig config ARM_NR_BANKS diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 6fd2cea..a48de17 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -267,6 +267,7 @@ core-$(CONFIG_KVM_ARM_HOST) += arch/arm/kvm/ core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/ core-y += arch/arm/net/ core-y += arch/arm/crypto/ +core-y += arch/arm/firmware/ core-y += $(machdirs) $(platdirs) drivers-$(CONFIG_OPROFILE) += arch/arm/oprofile/ diff --git a/arch/arm/firmware/Kconfig b/arch/arm/firmware/Kconfig new file mode 100644 index 0000000..fde21d0 --- /dev/null +++ b/arch/arm/firmware/Kconfig @@ -0,0 +1,26 @@ +config ARCH_SUPPORTS_FIRMWARE + bool + +config ARCH_SUPPORTS_TRUSTED_FOUNDATIONS + bool + select ARCH_SUPPORTS_FIRMWARE + +menu "Firmware options" + depends on ARCH_SUPPORTS_FIRMWARE + +config TRUSTED_FOUNDATIONS + bool "Trusted Foundations secure monitor support" + depends on ARCH_SUPPORTS_TRUSTED_FOUNDATIONS + help + Some 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 whenever + 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/firmware/Makefile b/arch/arm/firmware/Makefile new file mode 100644 index 0000000..a71f165 --- /dev/null +++ b/arch/arm/firmware/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o diff --git a/arch/arm/firmware/trusted_foundations.c b/arch/arm/firmware/trusted_foundations.c new file mode 100644 index 0000000..181f348 --- /dev/null +++ b/arch/arm/firmware/trusted_foundations.c @@ -0,0 +1,83 @@ +/* + * Trusted Foundations support for ARM 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 +#include + +#define TF_SET_CPU_BOOT_ADDR_SMC 0xfffff200 + +static void __naked tf_generic_smc(u32 type, u32 subtype, u32 arg) +{ + asm volatile( + ".arch_extension sec\n\t" + "stmfd sp!, {r4 - 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!, {r4 - r11, pc}" + : + : "r" (type), "r" (subtype), "r" (arg) + : "memory"); +} + +static int tf_set_cpu_boot_addr(int cpu, unsigned long boot_addr) +{ + tf_generic_smc(TF_SET_CPU_BOOT_ADDR_SMC, boot_addr, 0); + + return 0; +} + +static const struct firmware_ops trusted_foundations_ops = { + .set_cpu_boot_addr = tf_set_cpu_boot_addr, +}; + +void register_trusted_foundations(struct trusted_foundations_platform_data *pd) +{ + /* we are not using version information for now since currently + * supported SMCs are compatible with all TF releases */ + register_firmware_ops(&trusted_foundations_ops); +} + +void of_register_trusted_foundations(void) +{ + struct device_node *node; + + node = of_find_compatible_node(NULL, NULL, "tl,trusted-foundations"); + if (node) { + struct trusted_foundations_platform_data pdata; + int err; + + err = of_property_read_u32(node, "version-major", + &pdata.version_major); + if (err != 0) { + pr_crit("Trusted Foundation: missing version-major\n"); + BUG(); + } + err = of_property_read_u32(node, "version-minor", + &pdata.version_minor); + if (err != 0) { + pr_crit("Trusted Foundation: missing version-minor\n"); + BUG(); + } + register_trusted_foundations(&pdata); + } +} diff --git a/arch/arm/include/asm/trusted_foundations.h b/arch/arm/include/asm/trusted_foundations.h new file mode 100644 index 0000000..77a4961 --- /dev/null +++ b/arch/arm/include/asm/trusted_foundations.h @@ -0,0 +1,48 @@ +/* + * 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. + */ + +#ifndef __ASM_ARM_TRUSTED_FOUNDATIONS_H +#define __ASM_ARM_TRUSTED_FOUNDATIONS_H + +#include +#include +#include + +struct trusted_foundations_platform_data { + unsigned int version_major; + unsigned int version_minor; +}; + +#if IS_ENABLED(CONFIG_TRUSTED_FOUNDATIONS) + +void register_trusted_foundations(struct trusted_foundations_platform_data *pd); +void of_register_trusted_foundations(void); + +#else + +static inline void register_trusted_foundations( + struct trusted_foundations_platform_data *pd) +{ + pr_crit("No support for Trusted Foundations, stopping...\n"); + BUG(); +} + +static inline void of_register_trusted_foundations(void) +{ + register_trusted_foundations(NULL); +} + +#endif /* IS_ENABLED(CONFIG_TRUSTED_FOUNDATIONS) */ + +#endif -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/