The TPM device driver defines ascii and binary methods for displaying the TPM 1.2 event log via securityfs files, which are needed for validating a TPM quote. The device driver for TPM 2.0 does not have similar support for displaying the TPM 2.0 event log. This patch set adds the support for displaying TPM 2.0 event log in binary format.
The parsing mechanism to display the TPM 2.0 event log in binary format is implemented as defined in the TPM 2.0 TCG specification[1]. If the firmware event log support exists and is successfully read, the securityfs file is created to provide the event log in binary format for both the OF device tree and ACPI. - Patches 1 - 6 clean up the code and fix pre-existing issues. - Patch 7 moves the common TPM 1.2 and 2.0 event log initialization functions to a new file named tpm_eventlog_init.c. - Patch 8 adds the support for creating securityfs files and for displaying the TPM 2.0 crypto agile event log in binary format. With that, this patch set splits the event log functionality into initialization functions, TPM 1.2 event log parsing and TPM 2.0 event log parsing. [1] TCG EFI Protocol Specification, Family "2.0" - Section 5 "Event Log Structure" Changelog History: v4: - Includes feedbacks from Jarkko and Jason. - Patch "tpm: define a generic open() method for ascii & bios measurements". - Fix indentation issue. - Patch "tpm: replace the dynamically allocated bios_dir as struct dentry array". - Continue to use bios_dir_count variable to use is_bad() checks and to maintain correct order for securityfs_remove() during teardown. - Reset chip->bios_dir_count in teardown() function. - Patch "tpm: validate the eventlog access before tpm_bios_log_setup". - Retain TPM2 check which was removed in previous patch. - Add tpm_bios_log_setup failure handling. - Remove use of private data from v3 version of patch. Add a new member to struct tpm_chip to achieve the same purpose. - Patch "tpm: redefine the read_log method to check for ACPI/OF properties sequentially". - Move replacement of CONFIG_TCG_IBMVTPM with CONFIG_OF to this patch from patch 3. - Replace -1 error code with -ENODEV. - Patch "tpm: replace the of_find_node_by_name() with dev of_node property". - Uses chip->dev.parent->of_node. - Created separate patch for cleanup of pr_err messages. - Patch "tpm: remove printk error messages". - New Patch. - Patch "tpm: add the securityfs file support for TPM 2.0 eventlog". - Parses event digests using event alg_id rather than event log header alg_id. - Uses of_property_match_string to differentiate tpm/vtpm compatible property. - Adds the comment for difference in tpm/vtpm endianness. v3: - Includes the review feedbacks as suggested by Jason. - Split of patches into one patch per idea. - Generic open() method for ascii/bios measurements. - Replacement of of **bios_dir with *bios_dir[3]. - Verifying readlog() is successful before creating securityfs entries. - Generic readlog() to check for ACPI/OF in sequence. - read_log_of() method now uses of_node propertry rather than calling find_device_by_name. - read_log differentiates vtpm/tpm using its compatible property. - Cleans pr_err with dev_dbg. - Commit msgs subject line prefixed with tpm. v2: - Fixes issues as given in feedback by Jason. - Adds documentation for device tree. Nayna Jain (8): tpm: define a generic open() method for ascii & bios measurements tpm: replace dynamically allocated bios_dir with dentry array tpm: validate event log access before tpm_bios_log_setup tpm: redefine read_log() to handle ACPI/OF at runtime tpm: replace of_find_node_by_name() with dev of_node property tpm: remove printk error messages tpm: move event log init functions to tpm_eventlog_init.c tpm: add securityfs support for TPM 2.0 firmware event log drivers/char/tpm/Makefile | 14 +-- drivers/char/tpm/tpm-chip.c | 24 ++-- drivers/char/tpm/tpm.h | 9 +- drivers/char/tpm/tpm2.h | 79 +++++++++++++ drivers/char/tpm/tpm2_eventlog.c | 216 +++++++++++++++++++++++++++++++++++ drivers/char/tpm/tpm_acpi.c | 36 +++--- drivers/char/tpm/tpm_eventlog.c | 157 +------------------------ drivers/char/tpm/tpm_eventlog.h | 30 +++-- drivers/char/tpm/tpm_eventlog_init.c | 163 ++++++++++++++++++++++++++ drivers/char/tpm/tpm_of.c | 68 ++++++----- 10 files changed, 559 insertions(+), 237 deletions(-) create mode 100644 drivers/char/tpm/tpm2.h create mode 100644 drivers/char/tpm/tpm2_eventlog.c create mode 100644 drivers/char/tpm/tpm_eventlog_init.c -- 2.5.0 ------------------------------------------------------------------------------ _______________________________________________ tpmdd-devel mailing list tpmdd-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
