Jarkko Sakkinen @ 2017-03-24 10:10 GMT: > This commit adds support for requesting and relinquishing locality 0 in > tpm_crb for the course of command transmission. > > In order to achieve this, two new callbacks are added to struct > tpm_class_ops: > > - request_locality > - relinquish_locality > > With CRB interface you first set either requestAccess or relinquish bit > from TPM_LOC_CTRL_x register and then wait for locAssigned and > tpmRegValidSts bits to be set in the TPM_LOC_STATE_x register. > > The reason why were are doing this is to make sure that the driver > will work properly with Intel TXT that uses locality 2. There's no > explicit guarantee that it would relinquish this locality. In more > general sense this commit enables tpm_crb to be a well behaving > citizen in a multi locality environment. > > Signed-off-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Jerry Snitselaar <[email protected]> Tested-by: Jerry Snitselaar <[email protected]> Tested on kabylake system that was hitting issues with earlier iteration. Still don't have platform to test it dealing with multi-locality enviroment. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ tpmdd-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tpmdd-devel
