From: "Jarkko Sakkinen" <jarkko@kernel.org>
To: "Jarkko Sakkinen" <jarkko@kernel.org>,
"Daniel P. Smith" <dpsmith@apertussolutions.com>,
<linux-integrity@vger.kernel.org>
Cc: "Jonathan Corbet" <corbet@lwn.net>,
"Lino Sanfilippo" <l.sanfilippo@kunbus.com>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"Peter Huewe" <peterhuewe@gmx.de>,
"James Bottomley" <James.Bottomley@HansenPartnership.com>,
"Alexander Steffen" <Alexander.Steffen@infineon.com>,
<keyrings@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
"Randy Dunlap" <rdunlap@infradead.org>,
"Richard Cochran" <richardcochran@gmail.com>,
"open list:PTP HARDWARE CLOCK SUPPORT:Keyword:(?:b|_)ptp(?:b|_)"
<netdev@vger.kernel.org>
Subject: Re: [PATCH v4] Documentation: tpm_tis
Date: Sun, 24 Mar 2024 04:14:36 +0200 [thread overview]
Message-ID: <D01M8YKG5ZG0.287OTMCUU2KP5@kernel.org> (raw)
In-Reply-To: <D01CLI2TC5SZ.1A48PDHM5F3UA@kernel.org>
On Sat Mar 23, 2024 at 8:40 PM EET, Jarkko Sakkinen wrote:
> > Would it be worth clarifying here that one of those interfaces is
> > defined in the Mobile TPM specification, which also refers to its
> > interface as the CRB interface. In the past, this has caused great
> > confusion when working with individuals from the embedded community,
> > e.g., Arm. The Mobile TPM CRB interface, which can also be found being
> > used by some generations of AMD fTPM, is a doorbell style interface
> > using general-purpose memory. I would also point out that the Mobile TPM
> > CRB interface does not provide for the concept of localities.
>
> I don't necessarily disagree but it is out of scope for this. I'm not
> sure tho why "mobile" CRB would ever need that sort of separate
> dicussion.
>
> Some CRB implementations have localities some don't, and also fTPM
> implementations on x86 vary, no need to state that separately for
> mobile.
I.e. the variance exist but it is not "mobile" specific.
E.g. when I developed tpm_crb in 2014 at that time Intel PTT only
had a single locality (AFAIK later multiple localities were added
to support TXT).
In all cases this tpm_crb discussion is not really part of tpm_tis
discussion.
BR, Jarkko
prev parent reply other threads:[~2024-03-24 2:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-22 12:35 [PATCH v4] Documentation: tpm_tis Jarkko Sakkinen
2024-03-22 22:52 ` Jakub Kicinski
2024-03-23 18:25 ` Jarkko Sakkinen
2024-03-23 0:39 ` Daniel P. Smith
2024-03-23 18:40 ` Jarkko Sakkinen
2024-03-24 2:14 ` Jarkko Sakkinen [this message]
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