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| author | Rajiv Andrade <srajiv@linux.vnet.ibm.com> | 2010-03-25 00:55:32 -0300 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-03-26 09:30:03 +1100 |
| commit | 225a9be24d799aa16d543c31fb09f0c9ed1d9caa (patch) | |
| tree | e2db049524c7f153457e55506d1ef4cec0ccf39c /Documentation/kernel-parameters.txt | |
| parent | 310de047eef6685274045db1e6b39c9f313df428 (diff) | |
| download | lwn-225a9be24d799aa16d543c31fb09f0c9ed1d9caa.tar.gz lwn-225a9be24d799aa16d543c31fb09f0c9ed1d9caa.zip | |
TPM: workaround to enforce PCR updates across suspends
Add a workaround for TPM's which fail to flush last written
PCR values in a TPM_SaveState, in preparation for suspend.
Signed-off-by: David Safford <safford@watson.ibm.com>
Acked-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index d80930d58dae..e0df679c3902 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -99,6 +99,7 @@ parameter is applicable: SWSUSP Software suspend (hibernation) is enabled. SUSPEND System suspend states are enabled. FTRACE Function tracing enabled. + TPM TPM drivers are enabled. TS Appropriate touchscreen support is enabled. UMS USB Mass Storage support is enabled. USB USB support is enabled. @@ -2619,6 +2620,15 @@ and is between 256 and 4096 characters. It is defined in the file tp720= [HW,PS2] + tpm_suspend_pcr=[HW,TPM] + Format: integer pcr id + Specify that at suspend time, the tpm driver + should extend the specified pcr with zeros, + as a workaround for some chips which fail to + flush the last written pcr on TPM_SaveState. + This will guarantee that all the other pcrs + are saved. + trace_buf_size=nn[KMG] [FTRACE] will set tracing buffer size. |