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authorJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2014-12-12 22:46:37 +0300
committerPeter Huewe <peterhuewe@gmx.de>2015-01-17 16:00:10 +0300
commit313d21eeab9282e01fdcecd40e9ca87e0953627f (patch)
treec33c8a7d1bc2c589a7673e3781c4d3538059c896 /Documentation/ABI/stable
parent71ed848fd791bc0b53a1b7a04f29eb9e994c7cbb (diff)
downloadlinux-313d21eeab9282e01fdcecd40e9ca87e0953627f.tar.xz
tpm: device class for tpm
Added own device class for TPM. Uses MISC_MAJOR:TPM_MINOR for the first character device in order to retain backwards compatibility. Added tpm_dev_release() back attached to the character device. I've been running this code now for a while on my laptop (Lenovo T430S) TrouSerS works perfectly without modifications. I don't believe it breaks anything significantly. The sysfs attributes that have been placed under the wrong place and are against sysfs-rules.txt should be probably left to stagnate under platform device directory and start defining new sysfs attributes to the char device directory. Guidelines for future TPM sysfs attributes should be probably along the lines of - Single flat set of mandatory sysfs attributes. For example, current PPI interface is way way too rich when you only want to use it to clear and activate the TPM. - Define sysfs attribute if and only if there's no way to get the value from ring-3. No attributes for TPM properties. It's just unnecessary maintenance hurdle that we don't want. Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com> Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Tested-by: Scot Doyle <lkml14@scotdoyle.com> Tested-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'Documentation/ABI/stable')
-rw-r--r--Documentation/ABI/stable/sysfs-class-tpm22
1 files changed, 11 insertions, 11 deletions
diff --git a/Documentation/ABI/stable/sysfs-class-tpm b/Documentation/ABI/stable/sysfs-class-tpm
index a60b45e2493b..9f790eebb5d2 100644
--- a/Documentation/ABI/stable/sysfs-class-tpm
+++ b/Documentation/ABI/stable/sysfs-class-tpm
@@ -1,4 +1,4 @@
-What: /sys/class/misc/tpmX/device/
+What: /sys/class/tpm/tpmX/device/
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -6,7 +6,7 @@ Description: The device/ directory under a specific TPM instance exposes
the properties of that TPM chip
-What: /sys/class/misc/tpmX/device/active
+What: /sys/class/tpm/tpmX/device/active
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -18,7 +18,7 @@ Description: The "active" property prints a '1' if the TPM chip is accepting
section 17 for more information on which commands are
available.
-What: /sys/class/misc/tpmX/device/cancel
+What: /sys/class/tpm/tpmX/device/cancel
Date: June 2005
KernelVersion: 2.6.13
Contact: tpmdd-devel@lists.sf.net
@@ -26,7 +26,7 @@ Description: The "cancel" property allows you to cancel the currently
pending TPM command. Writing any value to cancel will call the
TPM vendor specific cancel operation.
-What: /sys/class/misc/tpmX/device/caps
+What: /sys/class/tpm/tpmX/device/caps
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -43,7 +43,7 @@ Description: The "caps" property contains TPM manufacturer and version info.
the chip supports. Firmware version is that of the chip and
is manufacturer specific.
-What: /sys/class/misc/tpmX/device/durations
+What: /sys/class/tpm/tpmX/device/durations
Date: March 2011
KernelVersion: 3.1
Contact: tpmdd-devel@lists.sf.net
@@ -66,7 +66,7 @@ Description: The "durations" property shows the 3 vendor-specific values
scaled to be displayed in usecs. In this case "[adjusted]"
will be displayed in place of "[original]".
-What: /sys/class/misc/tpmX/device/enabled
+What: /sys/class/tpm/tpmX/device/enabled
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -75,7 +75,7 @@ Description: The "enabled" property prints a '1' if the TPM chip is enabled,
may be visible but produce a '0' after some operation that
disables the TPM.
-What: /sys/class/misc/tpmX/device/owned
+What: /sys/class/tpm/tpmX/device/owned
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -83,7 +83,7 @@ Description: The "owned" property produces a '1' if the TPM_TakeOwnership
ordinal has been executed successfully in the chip. A '0'
indicates that ownership hasn't been taken.
-What: /sys/class/misc/tpmX/device/pcrs
+What: /sys/class/tpm/tpmX/device/pcrs
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -106,7 +106,7 @@ Description: The "pcrs" property will dump the current value of all Platform
1.2 chips, PCRs represent SHA-1 hashes, which are 20 bytes
long. Use the "caps" property to determine TPM version.
-What: /sys/class/misc/tpmX/device/pubek
+What: /sys/class/tpm/tpmX/device/pubek
Date: April 2005
KernelVersion: 2.6.12
Contact: tpmdd-devel@lists.sf.net
@@ -158,7 +158,7 @@ Description: The "pubek" property will return the TPM's public endorsement
Modulus Length: 256 (bytes)
Modulus: The 256 byte Endorsement Key modulus
-What: /sys/class/misc/tpmX/device/temp_deactivated
+What: /sys/class/tpm/tpmX/device/temp_deactivated
Date: April 2006
KernelVersion: 2.6.17
Contact: tpmdd-devel@lists.sf.net
@@ -167,7 +167,7 @@ Description: The "temp_deactivated" property returns a '1' if the chip has
cycle. Whether a warm boot (reboot) will clear a TPM chip
from a temp_deactivated state is platform specific.
-What: /sys/class/misc/tpmX/device/timeouts
+What: /sys/class/tpm/tpmX/device/timeouts
Date: March 2011
KernelVersion: 3.1
Contact: tpmdd-devel@lists.sf.net