From: Ken Goldman <kgoldman@us.ibm.com>
To: linux-security-module@vger.kernel.org
Cc: tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [tpmdd-devel] [PATCH 2/2] tpm2-space: add handling for global session exhaustion
Date: Wed, 1 Feb 2017 17:17:16 -0500 [thread overview]
Message-ID: <o6tmp7$ihn$1@blaine.gmane.org> (raw)
In-Reply-To: <20170201102906.y67owrhw4clvlge7@intel.com>
On 2/1/2017 5:29 AM, Jarkko Sakkinen wrote:
>
> I've been observing the discussion that you've been going with Ken and
> I've started to think: "why this needs to be put into kernel?" We still
> have quite narrow perspective of TPM 2.0 applications. It's so much more
> capable than TPM 1.2 that it will be definitely have a wider set of
> use cases.
Just session swapping, or the whole resource manager?
Session swapping has to be in the kernel because the TPM typically only
has 3 session slots. Something has to do the swapping.
The RM is far better in the kernel because the kernel also needs access
to the TPM, keys and sessions. If a user space RM fills all the slots,
the kernel has to either flush an application's resource (bad) or block
(really bad).
Putting the RM in the kernel is IMHO the right architecture.
prev parent reply other threads:[~2017-02-01 22:17 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-28 0:31 [PATCH 0/2] Add session handling to tpm spaces James Bottomley
2017-01-28 0:31 ` James Bottomley
[not found] ` <1485563481.3229.39.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-28 0:32 ` [PATCH v2 1/2] tpm2: add session handle context saving and restoring to the space code James Bottomley
2017-01-28 0:32 ` James Bottomley
2017-01-29 21:39 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170129213957.zx6v6g42kwcabc6y-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-29 22:36 ` James Bottomley
2017-01-29 22:36 ` [tpmdd-devel] " James Bottomley
[not found] ` <1485729418.2491.10.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-30 21:45 ` Jarkko Sakkinen
2017-01-30 21:45 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170130214526.56e4ai2k6zhzvgy4-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-30 22:14 ` James Bottomley
2017-01-30 22:14 ` [tpmdd-devel] " James Bottomley
[not found] ` <1485814477.2518.30.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-31 13:15 ` Jarkko Sakkinen
2017-01-31 13:15 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <1485563558.3229.41.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-30 0:35 ` Ken Goldman
2017-01-30 0:35 ` Ken Goldman
2017-01-30 0:55 ` [tpmdd-devel] " James Bottomley
2017-01-30 21:46 ` Jarkko Sakkinen
2017-01-31 16:21 ` Jarkko Sakkinen
2017-01-31 16:21 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170131162115.vptki5ykmpnx27ym-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-31 16:27 ` Jarkko Sakkinen
2017-01-31 16:27 ` [tpmdd-devel] " Jarkko Sakkinen
2017-01-31 22:55 ` James Bottomley
2017-01-31 22:55 ` [tpmdd-devel] " James Bottomley
[not found] ` <1485903340.3199.107.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-02-01 22:11 ` Ken Goldman
2017-01-28 0:33 ` [PATCH 2/2] tpm2-space: add handling for global session exhaustion James Bottomley
[not found] ` <1485563634.3229.43.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-29 22:02 ` Jarkko Sakkinen
2017-01-29 22:02 ` [tpmdd-devel] " Jarkko Sakkinen
2017-01-29 22:03 ` Jarkko Sakkinen
[not found] ` <20170129220219.oqv7fuofvcqy3gzh-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-31 23:24 ` James Bottomley
2017-01-31 23:24 ` [tpmdd-devel] " James Bottomley
2017-02-01 10:29 ` Jarkko Sakkinen
2017-02-01 22:17 ` Ken Goldman [this message]
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