From: amirmizi6@gmail.com
To: Eyal.Cohen@nuvoton.com, jarkko.sakkinen@linux.intel.com,
oshrialkoby85@gmail.com, alexander.steffen@infineon.com,
robh+dt@kernel.org, mark.rutland@arm.com, peterhuewe@gmx.de,
jgg@ziepe.ca, arnd@arndb.de, gregkh@linuxfoundation.org
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-integrity@vger.kernel.org, oshri.alkoby@nuvoton.com,
tmaimon77@gmail.com, gcwilson@us.ibm.com, kgoldman@us.ibm.com,
Dan.Morav@nuvoton.com, oren.tanami@nuvoton.com,
shmulik.hager@nuvoton.com, amir.mizinski@nuvoton.com,
Amir Mizinski <amirmizi6@gmail.com>
Subject: [PATCH v3 5/7] tpm: Handle an exception for TPM Firmware Update mode.
Date: Mon, 10 Feb 2020 18:28:36 +0200 [thread overview]
Message-ID: <20200210162838.173903-6-amirmizi6@gmail.com> (raw)
In-Reply-To: <20200210162838.173903-1-amirmizi6@gmail.com>
From: Amir Mizinski <amirmizi6@gmail.com>
An extra precaution for TPM Firmware Update Mode.
For example if TPM power was cut while in Firmware update, platform
should ignore selftest failure and skip TPM initialization sequence.
This improvment was suggested by Benoit Houyere.
Signed-off-by: Amir Mizinski <amirmizi6@gmail.com>
---
drivers/char/tpm/tpm2-cmd.c | 4 ++++
include/linux/tpm.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index 13696de..997b11e 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -725,6 +725,10 @@ int tpm2_auto_startup(struct tpm_chip *chip)
goto out;
rc = tpm2_do_selftest(chip);
+
+ if ((rc == TPM2_RC_UPGRADE) || (rc == TPM2_RC_COMMAND_CODE))
+ return 0;
+
if (rc && rc != TPM2_RC_INITIALIZE)
goto out;
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index 03e9b18..5a2e031 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -199,6 +199,7 @@ enum tpm2_return_codes {
TPM2_RC_INITIALIZE = 0x0100, /* RC_VER1 */
TPM2_RC_FAILURE = 0x0101,
TPM2_RC_DISABLED = 0x0120,
+ TPM2_RC_UPGRADE = 0x012D,
TPM2_RC_COMMAND_CODE = 0x0143,
TPM2_RC_TESTING = 0x090A, /* RC_WARN */
TPM2_RC_REFERENCE_H0 = 0x0910,
--
2.7.4
next prev parent reply other threads:[~2020-02-10 17:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-10 16:28 [PATCH v3 0/7] add tpm i2c ptp driver amirmizi6
2020-02-10 16:28 ` [PATCH v3 1/7] char: tpm: Make implementation of read16 read32 write32 optional amirmizi6
2020-02-12 15:07 ` Jarkko Sakkinen
2020-02-10 16:28 ` [PATCH v3 2/7] char: tpm: Add check_data handle to tpm_tis_phy_ops in order to check data integrity amirmizi6
2020-02-10 16:28 ` [PATCH v3 3/7] char: tpm: rewrite "tpm_tis_req_canceled()" amirmizi6
2020-02-10 16:28 ` [PATCH v3 4/7] char: tpm: Fix expected bit handling and send all bytes in one shot without last byte in exception amirmizi6
2020-02-10 16:28 ` amirmizi6 [this message]
2020-02-10 16:28 ` [PATCH v3 6/7] dt-bindings: tpm: Add YAML schema for TPM TIS I2C options amirmizi6
2020-02-12 1:59 ` Rob Herring
2020-02-10 16:28 ` [PATCH v3 7/7] char: tpm: add tpm_tis_i2c driver amirmizi6
2020-02-13 22:56 ` Eddie James
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