From: "Jarkko Sakkinen" <jarkko@kernel.org>
To: "Jarkko Sakkinen" <jarkko@kernel.org>,
<linux-integrity@vger.kernel.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Peter Huewe" <peterhuewe@gmx.de>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"James Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: "Mimi Zohar" <zohar@linux.ibm.com>,
"Roberto Sassu" <roberto.sassu@huawei.com>,
<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tpm: Opt-in in disable PCR encryption on TPM2 chips
Date: Thu, 07 Nov 2024 02:54:08 +0200 [thread overview]
Message-ID: <D5FJBKBSLIXR.3MRIPCQA5CSJD@kernel.org> (raw)
In-Reply-To: <D5FJ9VCD1JBL.22MQYQHUYJLJ8@kernel.org>
On Thu Nov 7, 2024 at 2:51 AM EET, Jarkko Sakkinen wrote:
> On Thu Nov 7, 2024 at 2:47 AM EET, Jarkko Sakkinen wrote:
> > From: Mimi Zohar <zohar@linux.ibm.com>
> >
> > The initial encrypted HMAC session feature added TPM bus encryption to
> > various in-kernel TPM operations. This can cause performance bottlenecks
> > with IMA, as it heavily utilizes PCR extend operations.
> >
> > In order to address this performance issue, introduce disable_encrypt_pcrs
> > kernel command-line parameter to the TPM driver.
> >
> > Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
We also probably want this:
Cc: stable@vger.kernel.org # v6.10+
BR, Jarkko
next prev parent reply other threads:[~2024-11-07 0:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-07 0:47 [PATCH] tpm: Opt-in in disable PCR encryption on TPM2 chips Jarkko Sakkinen
2024-11-07 0:51 ` Jarkko Sakkinen
2024-11-07 0:54 ` Jarkko Sakkinen [this message]
2024-11-07 2:48 ` Mimi Zohar
2024-11-07 6:24 ` Jarkko Sakkinen
2024-11-07 6:27 ` Jarkko Sakkinen
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