On Mon, Aug 14, 2017 at 07:09:16PM +0100, Hamza Attak wrote: > The patch simply replaces all msleep function calls with usleep_range calls > in the generic drivers. > > Tested with an Infineon TPM 1.2, using the generic tpm-tis module, for a > thousand PCR extends, we see results going from 1m57s unpatched to 40s > with the new patch. We obtain similar results when using the original and > patched tpm_infineon driver, which is also part of the patch. > Similarly with a STM TPM 2.0, using the CRB driver, it takes about 20ms per > extend unpatched and around 7ms with the new patch. > > Note that the PCR consistency is untouched with this patch, each TPM has > been tested with 10 million extends and the aggregated PCR value is > continuously verified to be correct. > > As an extension of this work, this could potentially and easily be applied > to other vendor's drivers. Still, these changes are not included in the > proposed patch as they are untested. > > Signed-off-by: Hamza Attak <ha...@hpe.com>
Applying this. Tested-by: Jarkko Sakkine <jarkko.sakki...@linux.intel.com> PS. Your short summary is broken. See how I fixed it. Otherwise, no complains. /Jarkko
