From: Nayna Jain <nayna@linux.ibm.com>
To: linuxppc-dev@ozlabs.org, linux-efi@vger.kernel.org,
linux-integrity@vger.kernel.org, devicetree@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>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Nayna Jain <nayna@linux.ibm.com>
Subject: [PATCH v6 4/9] powerpc: detect the trusted boot state of the system
Date: Fri, 27 Sep 2019 10:25:55 -0400 [thread overview]
Message-ID: <1569594360-7141-5-git-send-email-nayna@linux.ibm.com> (raw)
In-Reply-To: <1569594360-7141-1-git-send-email-nayna@linux.ibm.com>
PowerNV systems enables the IMA measurement rules only if the
trusted boot is enabled on the system.
This patch adds the function to detect if the system has trusted
boot enabled.
Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
---
arch/powerpc/include/asm/secure_boot.h | 6 ++++++
arch/powerpc/kernel/secure_boot.c | 14 ++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/arch/powerpc/include/asm/secure_boot.h b/arch/powerpc/include/asm/secure_boot.h
index 4e8e2b08a993..192caaedbe7a 100644
--- a/arch/powerpc/include/asm/secure_boot.h
+++ b/arch/powerpc/include/asm/secure_boot.h
@@ -14,6 +14,7 @@
bool is_powerpc_os_secureboot_enabled(void);
int get_powerpc_os_sb_node(struct device_node **node);
+bool is_powerpc_trustedboot_enabled(void);
#else
@@ -27,5 +28,10 @@ static inline int get_powerpc_os_sb_node(struct device_node **node)
return -ENOENT;
}
+static inline bool is_powerpc_os_trustedboot_enabled(void)
+{
+ return false;
+}
+
#endif
#endif
diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c
index 45ca19f5e836..9d452e1550ae 100644
--- a/arch/powerpc/kernel/secure_boot.c
+++ b/arch/powerpc/kernel/secure_boot.c
@@ -80,3 +80,17 @@ bool is_powerpc_os_secureboot_enabled(void)
pr_info("secureboot mode disabled\n");
return false;
}
+
+bool is_powerpc_trustedboot_enabled(void)
+{
+ struct device_node *node;
+
+ node = get_powerpc_fw_sb_node();
+ if (node && (of_find_property(node, "trusted-enabled", NULL))) {
+ pr_info("trustedboot mode enabled\n");
+ return true;
+ }
+
+ pr_info("trustedboot mode disabled\n");
+ return false;
+}
--
2.20.1
next prev parent reply other threads:[~2019-09-27 14:26 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-27 14:25 [PATCH v6 0/9] powerpc: Enabling IMA arch specific secure boot policies Nayna Jain
2019-09-27 14:25 ` [PATCH v6 1/9] dt-bindings: ibm,secureboot: secure boot specific properties for PowerNV Nayna Jain
2019-10-01 13:33 ` Rob Herring
2019-10-01 16:29 ` Nayna
2019-09-27 14:25 ` [PATCH v6 2/9] powerpc: detect the secure boot mode of the system Nayna Jain
2019-09-27 14:25 ` [PATCH v6 3/9] powerpc: add support to initialize ima policy rules Nayna Jain
2019-10-01 1:04 ` Thiago Jung Bauermann
2019-10-01 16:07 ` Nayna
2019-10-02 0:23 ` Thiago Jung Bauermann
2019-10-02 21:49 ` Mimi Zohar
2019-10-08 13:12 ` Nayna
2019-09-27 14:25 ` Nayna Jain [this message]
2019-09-27 14:25 ` [PATCH v6 5/9] powerpc/ima: add measurement rules to ima arch specific policy Nayna Jain
2019-09-29 4:20 ` Mimi Zohar
2019-09-27 14:25 ` [PATCH v6 6/9] ima: make process_buffer_measurement() non static Nayna Jain
2019-10-02 22:04 ` Mimi Zohar
2019-09-27 14:25 ` [PATCH v6 7/9] ima: check against blacklisted hashes for files with modsig Nayna Jain
2019-10-02 20:44 ` Mimi Zohar
2019-09-27 14:25 ` [PATCH v6 8/9] ima: deprecate permit_directio, instead use appraise_flag Nayna Jain
2019-10-02 21:00 ` Mimi Zohar
2019-09-27 14:26 ` [PATCH v6 9/9] powerpc/ima: update ima arch policy to check for blacklist Nayna Jain
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