On Mon, 2018-03-12 at 15:59 -0600, Jason Gunthorpe wrote: > On Mon, Mar 12, 2018 at 05:53:18PM -0400, Mimi Zohar wrote: > > > Using Kconfig to force the TPM to be builtin is not required, but > > helpful. Users interested in IMA-measurement could configure the TPM > > as builtin themselves. Without the TPM builtin, IMA goes into TPM- > > bypass mode. > > This issues, broadly speaking, we have lots of TPM drivers, selecting > only some to actually support IMA shows we have some kind of problem > here. True, IMA is not selecting the older TPM vendor specific modules, but only the newer TPM_TIS and now TPM_CRB modules. That doesn't imply that IMA only supports some TPMs. It means that by default, these TPMs are builtin. Anyone building a kernel, can select the vendor specific TPM to be builtin. Mimi
