# \[PATCH v9 0/3\] Enable PPI sysfs interface for TPM 2.0 - Subsystems: DRIVER CORE, KOBJECTS, DEBUGFS AND SYSFS, FILESYSTEMS (VFS and infrastructure), THE REST, TPM DEVICE DRIVER - Maintainers: Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Johan Hovold, Alexander Viro, Christian Brauner, Linus Torvalds, Peter Huewe, Jarkko Sakkinen - Series: 3 patches touching 6 files, +100/-49 - Status: PENDING ยท 1 of 3 reviewed - Pending, 1 of 3 reviewed. - Revision v9 (7 revisions archived). - List: linux-api - 2 messages, 1 author - Page: https://ratatoskr.run/linux-api/2015/09/4585535/t ## \[PATCH v9 0/3\] Enable PPI sysfs interface for TPM 2.0 - From: Jarkko Sakkinen \ - Date: 2015-09-29 07:36:55 - Message: https://ratatoskr.run/linux-api/2015/09/4585535.md ```text v9: * Fixed naming for __compat_only_sysfs_link_entry_to_kobj() v8: * Renamed sysfs_link_entry_to_kobj() to __compat_only_sysfs_link_entry_to_kobj() v7: * Fixed compile error when CONFIG_SYSFS is not enabled. v6: * Updated documentation. v5: * Removed dangling export of kernfs_remove_by_name_ns() from the sysfs patch. v4: * Use sysfs_remove_link() v3: * Fixed to_tpm_chip() macro. * Split into two patches. * Renamed sysfs_link_group_to_kobj to sysfs_link_entry_to_kobj * Only create the "backwards compatibility" symlink for TPM 1.x devices. Jarkko Sakkinen (3): sysfs: added __compat_only_sysfs_link_entry_to_kobj() tpm: move the PPI attributes to character device directory. tpm: update PPI documentation to address the location change. Documentation/ABI/testing/sysfs-driver-ppi | 19 ++++++++----- drivers/char/tpm/tpm-chip.c | 24 ++++++++++------ drivers/char/tpm/tpm.h | 17 ++++-------- drivers/char/tpm/tpm_ppi.c | 34 ++++++++--------------- fs/sysfs/group.c | 44 ++++++++++++++++++++++++++++++ include/linux/sysfs.h | 11 ++++++++ 6 files changed, 100 insertions(+), 49 deletions(-) -- 2.5.0 ``` ## \[PATCH v9 3/3\] tpm: update PPI documentation to address the location change. - From: Jarkko Sakkinen \ - Date: 2015-09-29 07:37:15 - Message: https://ratatoskr.run/linux-api/2015/09/4585538.md ```text Updated Documentation/ABI/testing/sysfs-driver-ppi in order to explain where PPI attributes are located and how backwards compatiblity is addressed. Signed-off-by: Jarkko Sakkinen --- Documentation/ABI/testing/sysfs-driver-ppi | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-driver-ppi b/Documentation/ABI/testing/sysfs-driver-ppi index 7d1435b..9921ef2 100644 --- a/Documentation/ABI/testing/sysfs-driver-ppi +++ b/Documentation/ABI/testing/sysfs-driver-ppi @@ -1,4 +1,4 @@ -What: /sys/devices/pnp0//ppi/ +What: /sys/class/tpm/tpmX/ppi/ Date: August 2012 Kernel Version: 3.6 Contact: xiaoyan.zhang@intel.com @@ -8,9 +8,14 @@ Description: folder makes sense. The folder path can be got by command 'find /sys/ -name 'pcrs''. For the detail information of PPI, please refer to the PPI specification from + http://www.trustedcomputinggroup.org/ -What: /sys/devices/pnp0//ppi/version + In Linux 4.2 ppi was moved to the character device directory. + A symlink from tpmX/device/ppi to tpmX/ppi to provide backwards + compatibility. + +What: /sys/class/tpm/tpmX/ppi/version Date: August 2012 Contact: xiaoyan.zhang@intel.com Description: @@ -18,7 +23,7 @@ Description: platform. This file is readonly. -What: /sys/devices/pnp0//ppi/request +What: /sys/class/tpm/tpmX/ppi/request Date: August 2012 Contact: xiaoyan.zhang@intel.com Description: @@ -28,7 +33,7 @@ Description: integer value range from 1 to 160, and 0 means no request. This file can be read and written. -What: /sys/devices/pnp0/00:/ppi/response +What: /sys/class/tpm/tpmX/ppi/response Date: August 2012 Contact: xiaoyan.zhang@intel.com Description: @@ -37,7 +42,7 @@ Description: : ". This file is readonly. -What: /sys/devices/pnp0//ppi/transition_action +What: /sys/class/tpm/tpmX/ppi/transition_action Date: August 2012 Contact: xiaoyan.zhang@intel.com Description: @@ -47,7 +52,7 @@ Description: description>". This file is readonly. -What: /sys/devices/pnp0//ppi/tcg_operations +What: /sys/class/tpm/tpmX/ppi/tcg_operations Date: August 2012 Contact: xiaoyan.zhang@intel.com Description: @@ -58,7 +63,7 @@ Description: This attribute is only supported by PPI version 1.2+. This file is readonly. -What: /sys/devices/pnp0//ppi/vs_operations +What: /sys/class/tpm/tpmX/ppi/vs_operations Date: August 2012 Contact: xiaoyan.zhang@intel.com Description: -- 2.5.0 ```