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,
"benoit.houyere@st.com--to=mark.rutland"@arm.com,
peterhuewe@gmx.de, christophe-h.richard@st.com, 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>,
Benoit Houyere <benoit.houyere@st.com>
Subject: [PATCH v5 5/7] tpm: Handle an exception for TPM Firmware Update mode.
Date: Sun, 5 Apr 2020 15:53:50 +0300 [thread overview]
Message-ID: <20200405125352.183693-6-amirmizi6@gmail.com> (raw)
In-Reply-To: <20200405125352.183693-1-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.
Suggested-by: Benoit Houyere <benoit.houyere@st.com>
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 7603295..b77e394 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -727,6 +727,10 @@ 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:[~2020-04-05 12:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-05 12:53 Add tpm i2c ptp driver amirmizi6
2020-04-05 12:53 ` [PATCH v5 1/7] tpm: tpm_tis: Make implementation of read16 read32 write32 optional amirmizi6
2020-04-05 12:53 ` [PATCH v5 2/7] tpm: tpm_tis: Add check_data handle to tpm_tis_phy_ops in order to check data integrity amirmizi6
2020-04-06 18:28 ` Jarkko Sakkinen
2020-04-05 12:53 ` [PATCH v5 3/7] tpm: tpm_tis: rewrite "tpm_tis_req_canceled()" amirmizi6
2020-04-05 12:53 ` [PATCH v5 4/7] tpm: tpm_tis: Fix expected bit handling and send all bytes in one shot without last byte in exception amirmizi6
2020-04-05 12:53 ` amirmizi6 [this message]
2020-04-05 12:53 ` [PATCH v5 6/7] dt-bindings: tpm: Add YAML schema for TPM TIS I2C options amirmizi6
2020-04-05 12:53 ` [PATCH v5 7/7] tpm: tpm_tis: add tpm_tis_i2c driver amirmizi6
2020-04-08 3:06 ` Joel Stanley
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