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 3/8] powerpc: detect the trusted boot state of the system Date: Sat, 19 Oct 2019 14:06:12 -0400 [thread overview] Message-ID: <1571508377-23603-4-git-send-email-nayna@linux.ibm.com> (raw) In-Reply-To: <1571508377-23603-1-git-send-email-nayna@linux.ibm.com> While secure boot permits only properly verified signed kernels to be booted, trusted boot takes a measurement of the kernel image prior to boot that can be subsequently compared against good known values via attestation services. This patch reads the trusted boot state of a PowerNV system. The state is used to conditionally enable additional measurement rules in the IMA arch-specific policies. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> --- arch/powerpc/include/asm/secure_boot.h | 6 ++++++ arch/powerpc/kernel/secure_boot.c | 24 ++++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/arch/powerpc/include/asm/secure_boot.h b/arch/powerpc/include/asm/secure_boot.h index 07d0fe0ca81f..a2ff556916c6 100644 --- a/arch/powerpc/include/asm/secure_boot.h +++ b/arch/powerpc/include/asm/secure_boot.h @@ -11,6 +11,7 @@ #ifdef CONFIG_PPC_SECURE_BOOT bool is_ppc_secureboot_enabled(void); +bool is_ppc_trustedboot_enabled(void); #else @@ -19,5 +20,10 @@ static inline bool is_ppc_secureboot_enabled(void) return false; } +static inline bool is_ppc_trustedboot_enabled(void) +{ + return false; +} + #endif #endif diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c index 99bba7915629..9753470ab08a 100644 --- a/arch/powerpc/kernel/secure_boot.c +++ b/arch/powerpc/kernel/secure_boot.c @@ -7,6 +7,17 @@ #include <linux/of.h> #include <asm/secure_boot.h> +static struct device_node *get_ppc_fw_sb_node(void) +{ + static const struct of_device_id ids[] = { + { .compatible = "ibm,secureboot-v1", }, + { .compatible = "ibm,secureboot-v2", }, + {}, + }; + + return of_find_matching_node(NULL, ids); +} + bool is_ppc_secureboot_enabled(void) { struct device_node *node; @@ -28,3 +39,16 @@ bool is_ppc_secureboot_enabled(void) pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled"); return enabled; } + +bool is_ppc_trustedboot_enabled(void) +{ + struct device_node *node; + bool enabled = false; + + node = get_ppc_fw_sb_node(); + enabled = of_property_read_bool(node, "trusted-enabled"); + + pr_info("Trusted 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 3/8] powerpc: detect the trusted boot state of the system Date: Sat, 19 Oct 2019 14:06:12 -0400 [thread overview] Message-ID: <1571508377-23603-4-git-send-email-nayna@linux.ibm.com> (raw) In-Reply-To: <1571508377-23603-1-git-send-email-nayna@linux.ibm.com> While secure boot permits only properly verified signed kernels to be booted, trusted boot takes a measurement of the kernel image prior to boot that can be subsequently compared against good known values via attestation services. This patch reads the trusted boot state of a PowerNV system. The state is used to conditionally enable additional measurement rules in the IMA arch-specific policies. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> --- arch/powerpc/include/asm/secure_boot.h | 6 ++++++ arch/powerpc/kernel/secure_boot.c | 24 ++++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/arch/powerpc/include/asm/secure_boot.h b/arch/powerpc/include/asm/secure_boot.h index 07d0fe0ca81f..a2ff556916c6 100644 --- a/arch/powerpc/include/asm/secure_boot.h +++ b/arch/powerpc/include/asm/secure_boot.h @@ -11,6 +11,7 @@ #ifdef CONFIG_PPC_SECURE_BOOT bool is_ppc_secureboot_enabled(void); +bool is_ppc_trustedboot_enabled(void); #else @@ -19,5 +20,10 @@ static inline bool is_ppc_secureboot_enabled(void) return false; } +static inline bool is_ppc_trustedboot_enabled(void) +{ + return false; +} + #endif #endif diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c index 99bba7915629..9753470ab08a 100644 --- a/arch/powerpc/kernel/secure_boot.c +++ b/arch/powerpc/kernel/secure_boot.c @@ -7,6 +7,17 @@ #include <linux/of.h> #include <asm/secure_boot.h> +static struct device_node *get_ppc_fw_sb_node(void) +{ + static const struct of_device_id ids[] = { + { .compatible = "ibm,secureboot-v1", }, + { .compatible = "ibm,secureboot-v2", }, + {}, + }; + + return of_find_matching_node(NULL, ids); +} + bool is_ppc_secureboot_enabled(void) { struct device_node *node; @@ -28,3 +39,16 @@ bool is_ppc_secureboot_enabled(void) pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled"); return enabled; } + +bool is_ppc_trustedboot_enabled(void) +{ + struct device_node *node; + bool enabled = false; + + node = get_ppc_fw_sb_node(); + enabled = of_property_read_bool(node, "trusted-enabled"); + + pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled"); + + return enabled; +} -- 2.20.1
next prev parent reply other threads:[~2019-10-19 18:06 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 ` [PATCH v8 1/8] powerpc: detect the secure boot mode of the system Nayna Jain 2019-10-19 18:06 ` 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 ` Nayna Jain [this message] 2019-10-19 18:06 ` [PATCH v8 3/8] powerpc: detect the trusted boot state of the system 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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