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| author | Jarkko Sakkinen <[email protected]> | 2024-11-13 05:54:12 +0000 |
|---|---|---|
| committer | Jarkko Sakkinen <[email protected]> | 2024-11-13 19:10:45 +0000 |
| commit | 27184f8905ba680f22abf1707fbed24036a67119 (patch) | |
| tree | 41ee96a7f5cc05747216cd7401c6014dfa7280fd /drivers/cdx/controller/cdx_controller.c | |
| parent | Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm (diff) | |
| download | kernel-27184f8905ba680f22abf1707fbed24036a67119.tar.gz kernel-27184f8905ba680f22abf1707fbed24036a67119.zip | |
tpm: Opt-in in disable PCR integrity protection
The initial HMAC session feature added TPM bus encryption and/or integrity
protection to various in-kernel TPM operations. This can cause performance
bottlenecks with IMA, as it heavily utilizes PCR extend operations.
In order to mitigate this performance issue, introduce a kernel
command-line parameter to the TPM driver for disabling the integrity
protection for PCR extend operations (i.e. TPM2_PCR_Extend).
Cc: James Bottomley <[email protected]>
Link: https://lore.kernel.org/linux-integrity/[email protected]/
Fixes: 6519fea6fd37 ("tpm: add hmac checks to tpm2_pcr_extend()")
Tested-by: Mimi Zohar <[email protected]>
Co-developed-by: Roberto Sassu <[email protected]>
Signed-off-by: Roberto Sassu <[email protected]>
Co-developed-by: Mimi Zohar <[email protected]>
Signed-off-by: Mimi Zohar <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>
Diffstat (limited to 'drivers/cdx/controller/cdx_controller.c')
0 files changed, 0 insertions, 0 deletions