From: Nayna Jain <nayna@linux.vnet.ibm.com>
To: tpmdd-devel@lists.sourceforge.net
Cc: peterhuewe@gmx.de, tpmdd@selhorst.net,
jarkko.sakkinen@linux.intel.com, jgunthorpe@obsidianresearch.com,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-ima-devel@lists.sourceforge.net, patrickc@us.ibm.com,
Nayna Jain <nayna@linux.vnet.ibm.com>
Subject: [PATCH v2 0/4] additional TPM performance improvements
Date: Wed, 6 Sep 2017 08:56:35 -0400 [thread overview]
Message-ID: <20170906125643.5070-1-nayna@linux.vnet.ibm.com> (raw)
After further discussions with the Device Driver working group (ddwg),
the following changes were made:
* Check for burstcount at least once to confirm the TPM is ready to accept
the data. Similarly, query for the TPM Expect status as sanity check at
the end.
* Make the sleep for status check during send() in the loop less than
5msec.
* Make the sleep in the loop while querying for burstcount less than
5msec.
Below is the list of patches along with the performance improvements
seen with a TPM 1.2 with an 8 byte burstcount for 1000 extends:
Patch |Improvement(time in sec)
tpm: ignore burstcount to improve tpm_tis | ~41 - ~14
send() performance.
tpm: define __wait_for_tpm_stat to specify | ~14 - ~10
variable polling sleep time
tpm: reduce tpm_msleep() time in | ~10 - ~9
get_burstcount()
tpm: modify tpm_msleep() function to have | ~9 - ~8
max range
Changelog v2:
* Add module parameter to handle ignoring of burst count during
tpm tis send() operation.
* Add improvements over sleep time to reduce delays.
Nayna Jain (4):
tpm: ignore burstcount to improve tpm_tis send() performance.
tpm: define __wait_for_tpm_stat to specify variable polling sleep time
tpm: reduce tpm_msleep() time in get_burstcount()
tpm: use tpm_msleep() value as max delay
Documentation/admin-guide/kernel-parameters.txt | 8 ++++++
drivers/char/tpm/tpm-interface.c | 15 ++++++++--
drivers/char/tpm/tpm.h | 7 +++--
drivers/char/tpm/tpm_tis_core.c | 37 +++++++++++++++++++------
4 files changed, 53 insertions(+), 14 deletions(-)
--
2.13.3
WARNING: multiple messages have this Message-ID (diff)
From: nayna@linux.vnet.ibm.com (Nayna Jain)
To: linux-security-module@vger.kernel.org
Subject: [PATCH v2 0/4] additional TPM performance improvements
Date: Wed, 6 Sep 2017 08:56:35 -0400 [thread overview]
Message-ID: <20170906125643.5070-1-nayna@linux.vnet.ibm.com> (raw)
After further discussions with the Device Driver working group (ddwg),
the following changes were made:
* Check for burstcount at least once to confirm the TPM is ready to accept
the data. Similarly, query for the TPM Expect status as sanity check at
the end.
* Make the sleep for status check during send() in the loop less than
5msec.
* Make the sleep in the loop while querying for burstcount less than
5msec.
Below is the list of patches along with the performance improvements
seen with a TPM 1.2 with an 8 byte burstcount for 1000 extends:
Patch |Improvement(time in sec)
tpm: ignore burstcount to improve tpm_tis | ~41 - ~14
send() performance.
tpm: define __wait_for_tpm_stat to specify | ~14 - ~10
variable polling sleep time
tpm: reduce tpm_msleep() time in | ~10 - ~9
get_burstcount()
tpm: modify tpm_msleep() function to have | ~9 - ~8
max range
Changelog v2:
* Add module parameter to handle ignoring of burst count during
tpm tis send() operation.
* Add improvements over sleep time to reduce delays.
Nayna Jain (4):
tpm: ignore burstcount to improve tpm_tis send() performance.
tpm: define __wait_for_tpm_stat to specify variable polling sleep time
tpm: reduce tpm_msleep() time in get_burstcount()
tpm: use tpm_msleep() value as max delay
Documentation/admin-guide/kernel-parameters.txt | 8 ++++++
drivers/char/tpm/tpm-interface.c | 15 ++++++++--
drivers/char/tpm/tpm.h | 7 +++--
drivers/char/tpm/tpm_tis_core.c | 37 +++++++++++++++++++------
4 files changed, 53 insertions(+), 14 deletions(-)
--
2.13.3
--
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WARNING: multiple messages have this Message-ID (diff)
From: Nayna Jain <nayna-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
To: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: patrickc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org,
jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org,
linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-ima-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: [PATCH v2 0/4] additional TPM performance improvements
Date: Wed, 6 Sep 2017 08:56:35 -0400 [thread overview]
Message-ID: <20170906125643.5070-1-nayna@linux.vnet.ibm.com> (raw)
After further discussions with the Device Driver working group (ddwg),
the following changes were made:
* Check for burstcount at least once to confirm the TPM is ready to accept
the data. Similarly, query for the TPM Expect status as sanity check at
the end.
* Make the sleep for status check during send() in the loop less than
5msec.
* Make the sleep in the loop while querying for burstcount less than
5msec.
Below is the list of patches along with the performance improvements
seen with a TPM 1.2 with an 8 byte burstcount for 1000 extends:
Patch |Improvement(time in sec)
tpm: ignore burstcount to improve tpm_tis | ~41 - ~14
send() performance.
tpm: define __wait_for_tpm_stat to specify | ~14 - ~10
variable polling sleep time
tpm: reduce tpm_msleep() time in | ~10 - ~9
get_burstcount()
tpm: modify tpm_msleep() function to have | ~9 - ~8
max range
Changelog v2:
* Add module parameter to handle ignoring of burst count during
tpm tis send() operation.
* Add improvements over sleep time to reduce delays.
Nayna Jain (4):
tpm: ignore burstcount to improve tpm_tis send() performance.
tpm: define __wait_for_tpm_stat to specify variable polling sleep time
tpm: reduce tpm_msleep() time in get_burstcount()
tpm: use tpm_msleep() value as max delay
Documentation/admin-guide/kernel-parameters.txt | 8 ++++++
drivers/char/tpm/tpm-interface.c | 15 ++++++++--
drivers/char/tpm/tpm.h | 7 +++--
drivers/char/tpm/tpm_tis_core.c | 37 +++++++++++++++++++------
4 files changed, 53 insertions(+), 14 deletions(-)
--
2.13.3
------------------------------------------------------------------------------
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next reply other threads:[~2017-09-06 13:01 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-06 12:56 Nayna Jain [this message]
2017-09-06 12:56 ` [PATCH v2 0/4] additional TPM performance improvements Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 12:56 ` [PATCH v2 1/4] tpm: ignore burstcount to improve tpm_tis send() performance Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 16:12 ` Jason Gunthorpe
2017-09-06 16:12 ` Jason Gunthorpe
2017-09-13 18:52 ` [tpmdd-devel] " Ken Goldman
2017-09-13 18:52 ` Ken Goldman
2017-09-13 18:52 ` Ken Goldman
2017-09-13 19:01 ` Peter Huewe
2017-09-13 19:01 ` Peter Huewe
2017-09-13 19:01 ` [tpmdd-devel] " Peter Huewe
2017-09-13 0:45 ` Jarkko Sakkinen
2017-09-13 0:45 ` Jarkko Sakkinen
2017-09-13 18:39 ` Peter Huewe
2017-09-13 18:39 ` Peter Huewe
2017-09-13 18:39 ` Peter Huewe
2017-09-13 23:10 ` Jarkko Sakkinen
2017-09-13 23:10 ` Jarkko Sakkinen
2017-09-15 12:29 ` Nayna Jain
2017-09-15 12:29 ` Nayna Jain
2017-09-15 15:19 ` Jarkko Sakkinen
2017-09-15 15:19 ` Jarkko Sakkinen
2017-09-06 12:56 ` [PATCH v2 2/4] tpm: define __wait_for_tpm_stat to specify variable polling sleep time Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-13 0:58 ` Jarkko Sakkinen
2017-09-13 0:58 ` Jarkko Sakkinen
2017-09-15 12:37 ` Nayna Jain
2017-09-15 12:37 ` Nayna Jain
2017-09-15 15:20 ` Jarkko Sakkinen
2017-09-15 15:20 ` Jarkko Sakkinen
2017-09-06 12:56 ` [PATCH v2 3/4] tpm: reduce tpm_msleep() time in get_burstcount() Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-13 1:00 ` Jarkko Sakkinen
2017-09-13 1:00 ` Jarkko Sakkinen
2017-09-15 12:40 ` Nayna Jain
2017-09-15 12:40 ` Nayna Jain
2017-09-06 12:56 ` [PATCH v2 4/4] tpm: use tpm_msleep() value as max delay Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-13 0:47 ` Jarkko Sakkinen
2017-09-13 0:47 ` Jarkko Sakkinen
2017-09-14 9:25 ` Nayna Jain
2017-09-14 9:25 ` Nayna Jain
2017-09-14 12:28 ` Jarkko Sakkinen
2017-09-14 12:28 ` Jarkko Sakkinen
2017-09-06 12:56 ` [PATCH 1/4] tpm: ignore burstcount to improve tpm_tis send() performance Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 12:58 ` Nayna
2017-09-06 12:58 ` Nayna
2017-09-06 12:58 ` Nayna
2017-09-06 12:56 ` [PATCH 2/4] tpm: define __wait_for_tpm_stat to specify variable polling sleep time Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 12:56 ` Nayna Jain
2017-09-06 12:58 ` Nayna
2017-09-06 12:58 ` Nayna
2017-09-07 16:18 ` [PATCH v2 0/4] additional TPM performance improvements Jarkko Sakkinen
2017-09-07 16:18 ` Jarkko Sakkinen
2017-09-11 15:20 ` [tpmdd-devel] " Alexander.Steffen
2017-09-11 15:20 ` Alexander.Steffen
2017-09-11 15:20 ` Alexander.Steffen at infineon.com
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