Re: Fwd: Re: [tpmdd-devel] [PATCH v9 2/2] tpm: add securityfs support,for TPM 2.0 firmware event log
From: Mimi Zohar
Date: Tue Jan 31 2017 - 22:41:30 EST
On Wed, 2017-02-01 at 08:46 +1100, James Morris wrote:
> On Tue, 31 Jan 2017, Jarkko Sakkinen wrote:
> > James,
> > The discussion is about two features:
> > 1. Extension to tpm_pcr_extend() (used by IMA) to extend all PCR banks
> > instead of just SHA-1 banks. It is recommended by TCG to do so in
> > order to prevent malicious use of PCRs.
> > 2. TPM 2.0 event log with backend support for OF device tree (for
> > getting address where you can grab it).
> > These are required as baseline to implement full TPM 2.0 support for
> > IMA. The commits are fairly well baked and went through many iterations.
> > I've tested tpm_pcr_extend() patches. I haven't tested event log patches
> > but have extensively reviewed them and Ken Goldman has tested them with
> > POWER hardware.
> > I don't believe that there is major risk to put them already into 4.11
> > but it is fairly late so I just want a second opinion before putting
> > them into pull request.
> I'll take this for 4.11. IMA + TPM 2.0 is still developmental and not in
> wide use, afaik.
Thank you! FYI, I've been running with them as well.