From: Nayna Jain <nayna@linux.ibm.com> To: linuxppc-dev@ozlabs.org, linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Michael Ellerman <mpe@ellerman.id.au>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Jeremy Kerr <jk@ozlabs.org>, Matthew Garret <matthew.garret@nebula.com>, Mimi Zohar <zohar@linux.ibm.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Claudio Carvalho <cclaudio@linux.ibm.com>, George Wilson <gcwilson@linux.ibm.com>, Elaine Palmer <erpalmer@us.ibm.com>, Eric Ricther <erichte@linux.ibm.com>, "Oliver O'Halloran" <oohall@gmail.com>, Nayna Jain <nayna@linux.ibm.com>, Prakhar Srivastava <prsriva02@gmail.com>, Lakshmi Ramasubramanian <nramas@linux.microsoft.com> Subject: [PATCH v8 1/8] powerpc: detect the secure boot mode of the system Date: Sat, 19 Oct 2019 14:06:10 -0400 [thread overview] Message-ID: <1571508377-23603-2-git-send-email-nayna@linux.ibm.com> (raw) In-Reply-To: <1571508377-23603-1-git-send-email-nayna@linux.ibm.com> This patch defines a function to detect the secure boot state of a PowerNV system. The PPC_SECURE_BOOT config represents the base enablement of secure boot for powerpc. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> --- arch/powerpc/Kconfig | 10 +++++++++ arch/powerpc/include/asm/secure_boot.h | 23 ++++++++++++++++++++ arch/powerpc/kernel/Makefile | 2 ++ arch/powerpc/kernel/secure_boot.c | 30 ++++++++++++++++++++++++++ 4 files changed, 65 insertions(+) create mode 100644 arch/powerpc/include/asm/secure_boot.h create mode 100644 arch/powerpc/kernel/secure_boot.c diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 3e56c9c2f16e..56ea0019b616 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -934,6 +934,16 @@ config PPC_MEM_KEYS If unsure, say y. +config PPC_SECURE_BOOT + prompt "Enable secure boot support" + bool + depends on PPC_POWERNV + help + Systems with firmware secure boot enabled need to define security + policies to extend secure boot to the OS. This config allows a user + to enable OS secure boot on systems that have firmware support for + it. If in doubt say N. + endmenu config ISA_DMA_API diff --git a/arch/powerpc/include/asm/secure_boot.h b/arch/powerpc/include/asm/secure_boot.h new file mode 100644 index 000000000000..07d0fe0ca81f --- /dev/null +++ b/arch/powerpc/include/asm/secure_boot.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Secure boot definitions + * + * Copyright (C) 2019 IBM Corporation + * Author: Nayna Jain + */ +#ifndef _ASM_POWER_SECURE_BOOT_H +#define _ASM_POWER_SECURE_BOOT_H + +#ifdef CONFIG_PPC_SECURE_BOOT + +bool is_ppc_secureboot_enabled(void); + +#else + +static inline bool is_ppc_secureboot_enabled(void) +{ + return false; +} + +#endif +#endif diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index a7ca8fe62368..e2a54fa240ac 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -161,6 +161,8 @@ ifneq ($(CONFIG_PPC_POWERNV)$(CONFIG_PPC_SVM),) obj-y += ucall.o endif +obj-$(CONFIG_PPC_SECURE_BOOT) += secure_boot.o + # Disable GCOV, KCOV & sanitizers in odd or sensitive code GCOV_PROFILE_prom_init.o := n KCOV_INSTRUMENT_prom_init.o := n diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c new file mode 100644 index 000000000000..99bba7915629 --- /dev/null +++ b/arch/powerpc/kernel/secure_boot.c @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 IBM Corporation + * Author: Nayna Jain + */ +#include <linux/types.h> +#include <linux/of.h> +#include <asm/secure_boot.h> + +bool is_ppc_secureboot_enabled(void) +{ + struct device_node *node; + bool enabled = false; + + node = of_find_compatible_node(NULL, NULL, "ibm,secvar-v1"); + if (!of_device_is_available(node)) { + pr_err("Cannot find secure variable node in device tree; failing to secure state\n"); + goto out; + } + + /* + * secureboot is enabled if os-secure-enforcing property exists, + * else disabled. + */ + enabled = of_property_read_bool(node, "os-secure-enforcing"); + +out: + pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled"); + return enabled; +} -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Nayna Jain <nayna@linux.ibm.com> To: linuxppc-dev@ozlabs.org, linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org Cc: Prakhar Srivastava <prsriva02@gmail.com>, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Eric Ricther <erichte@linux.ibm.com>, Nayna Jain <nayna@linux.ibm.com>, linux-kernel@vger.kernel.org, Mimi Zohar <zohar@linux.ibm.com>, Claudio Carvalho <cclaudio@linux.ibm.com>, Matthew Garret <matthew.garret@nebula.com>, Lakshmi Ramasubramanian <nramas@linux.microsoft.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Paul Mackerras <paulus@samba.org>, Jeremy Kerr <jk@ozlabs.org>, Elaine Palmer <erpalmer@us.ibm.com>, Oliver O'Halloran <oohall@gmail.com>, George Wilson <gcwilson@linux.ibm.com> Subject: [PATCH v8 1/8] powerpc: detect the secure boot mode of the system Date: Sat, 19 Oct 2019 14:06:10 -0400 [thread overview] Message-ID: <1571508377-23603-2-git-send-email-nayna@linux.ibm.com> (raw) In-Reply-To: <1571508377-23603-1-git-send-email-nayna@linux.ibm.com> This patch defines a function to detect the secure boot state of a PowerNV system. The PPC_SECURE_BOOT config represents the base enablement of secure boot for powerpc. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> --- arch/powerpc/Kconfig | 10 +++++++++ arch/powerpc/include/asm/secure_boot.h | 23 ++++++++++++++++++++ arch/powerpc/kernel/Makefile | 2 ++ arch/powerpc/kernel/secure_boot.c | 30 ++++++++++++++++++++++++++ 4 files changed, 65 insertions(+) create mode 100644 arch/powerpc/include/asm/secure_boot.h create mode 100644 arch/powerpc/kernel/secure_boot.c diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 3e56c9c2f16e..56ea0019b616 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -934,6 +934,16 @@ config PPC_MEM_KEYS If unsure, say y. +config PPC_SECURE_BOOT + prompt "Enable secure boot support" + bool + depends on PPC_POWERNV + help + Systems with firmware secure boot enabled need to define security + policies to extend secure boot to the OS. This config allows a user + to enable OS secure boot on systems that have firmware support for + it. If in doubt say N. + endmenu config ISA_DMA_API diff --git a/arch/powerpc/include/asm/secure_boot.h b/arch/powerpc/include/asm/secure_boot.h new file mode 100644 index 000000000000..07d0fe0ca81f --- /dev/null +++ b/arch/powerpc/include/asm/secure_boot.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Secure boot definitions + * + * Copyright (C) 2019 IBM Corporation + * Author: Nayna Jain + */ +#ifndef _ASM_POWER_SECURE_BOOT_H +#define _ASM_POWER_SECURE_BOOT_H + +#ifdef CONFIG_PPC_SECURE_BOOT + +bool is_ppc_secureboot_enabled(void); + +#else + +static inline bool is_ppc_secureboot_enabled(void) +{ + return false; +} + +#endif +#endif diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index a7ca8fe62368..e2a54fa240ac 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -161,6 +161,8 @@ ifneq ($(CONFIG_PPC_POWERNV)$(CONFIG_PPC_SVM),) obj-y += ucall.o endif +obj-$(CONFIG_PPC_SECURE_BOOT) += secure_boot.o + # Disable GCOV, KCOV & sanitizers in odd or sensitive code GCOV_PROFILE_prom_init.o := n KCOV_INSTRUMENT_prom_init.o := n diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c new file mode 100644 index 000000000000..99bba7915629 --- /dev/null +++ b/arch/powerpc/kernel/secure_boot.c @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 IBM Corporation + * Author: Nayna Jain + */ +#include <linux/types.h> +#include <linux/of.h> +#include <asm/secure_boot.h> + +bool is_ppc_secureboot_enabled(void) +{ + struct device_node *node; + bool enabled = false; + + node = of_find_compatible_node(NULL, NULL, "ibm,secvar-v1"); + if (!of_device_is_available(node)) { + pr_err("Cannot find secure variable node in device tree; failing to secure state\n"); + goto out; + } + + /* + * secureboot is enabled if os-secure-enforcing property exists, + * else disabled. + */ + enabled = of_property_read_bool(node, "os-secure-enforcing"); + +out: + pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled"); + return enabled; +} -- 2.20.1
next prev parent reply other threads:[~2019-10-19 18:11 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-19 18:06 [PATCH v8 0/8] powerpc: Enabling IMA arch specific secure boot policies Nayna Jain 2019-10-19 18:06 ` Nayna Jain 2019-10-19 18:06 ` Nayna Jain [this message] 2019-10-19 18:06 ` [PATCH v8 1/8] powerpc: detect the secure boot mode of the system Nayna Jain 2019-10-22 23:37 ` Michael Ellerman 2019-10-22 23:37 ` Michael Ellerman 2019-10-19 18:06 ` [PATCH v8 2/8] powerpc/ima: add support to initialize ima policy rules Nayna Jain 2019-10-19 18:06 ` Nayna Jain 2019-10-20 0:16 ` Mimi Zohar 2019-10-20 0:16 ` Mimi Zohar 2019-10-19 18:06 ` [PATCH v8 3/8] powerpc: detect the trusted boot state of the system Nayna Jain 2019-10-19 18:06 ` Nayna Jain 2019-10-20 12:48 ` Mimi Zohar 2019-10-20 12:48 ` Mimi Zohar 2019-10-22 23:38 ` Michael Ellerman 2019-10-22 23:38 ` Michael Ellerman 2019-10-19 18:06 ` [PATCH v8 4/8] powerpc/ima: add measurement rules to ima arch specific policy Nayna Jain 2019-10-19 18:06 ` Nayna Jain 2019-10-20 0:16 ` Mimi Zohar 2019-10-20 0:16 ` Mimi Zohar 2019-10-19 18:06 ` [PATCH v8 5/8] ima: make process_buffer_measurement() generic Nayna Jain 2019-10-19 18:06 ` Nayna Jain 2019-10-20 1:21 ` Mimi Zohar 2019-10-20 1:21 ` Mimi Zohar 2019-10-19 18:06 ` [PATCH v8 6/8] certs: add wrapper function to check blacklisted binary hash Nayna Jain 2019-10-19 18:06 ` Nayna Jain 2019-10-19 18:06 ` [PATCH v8 7/8] ima: check against blacklisted hashes for files with modsig Nayna Jain 2019-10-19 18:06 ` Nayna Jain 2019-10-20 0:58 ` Mimi Zohar 2019-10-20 0:58 ` Mimi Zohar 2019-10-20 16:06 ` Mimi Zohar 2019-10-20 16:06 ` Mimi Zohar 2019-10-20 16:09 ` Mimi Zohar 2019-10-20 16:09 ` Mimi Zohar 2019-10-19 18:06 ` [PATCH v8 8/8] powerpc/ima: update ima arch policy to check for blacklist Nayna Jain 2019-10-19 18:06 ` Nayna Jain
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