[PATCH] tpm: add bios measurement log

According to the TCG specifications measurements or hashes of the BIOS code
and data are extended into TPM PCRS and a log is kept in an ACPI table of
these extensions for later validation if desired.  This patch exports the
values in the ACPI table through a security-fs seq_file.

Signed-off-by: Seiji Munetoh <munetoh@jp.ibm.com>
Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
Signed-off-by: Reiner Sailer <sailer@us.ibm.com>
Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index a9be0e8eaea5..5a3870477ef1 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -466,6 +466,7 @@ void tpm_remove_hardware(struct device *dev)
         kfree(chip->vendor->miscdev.name);
 
         sysfs_remove_group(&dev->kobj, chip->vendor->attr_group);
+        tpm_bios_log_teardown(chip->bios_dir);
 
         dev_mask[chip->dev_num / TPM_NUM_MASK_ENTRIES ] &=
                 ~(1 << (chip->dev_num % TPM_NUM_MASK_ENTRIES));
@@ -593,6 +594,8 @@ dev_num_search_complete:
 
         sysfs_create_group(&dev->kobj, chip->vendor->attr_group);
 
+        chip->bios_dir = tpm_bios_log_setup(devname);
+
         return 0;
 }
 EXPORT_SYMBOL_GPL(tpm_register_hardware);