From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: "Fuchs, Andreas" <andreas.fuchs@sit.fraunhofer.de>
Cc: Joel Schopp <jschopp@linux.vnet.ibm.com>,
Leonidas Da Silva Barbosa <leosilva@linux.vnet.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Rajiv Andrade <mail@srajiv.net>,
"tpmdd-devel@lists.sourceforge.net"
<tpmdd-devel@lists.sourceforge.net>,
Richard Maciel Costa <richardm@br.ibm.com>,
"trousers-tech@lists.sourceforge.net"
<trousers-tech@lists.sourceforge.net>,
Daniel De Graaf <dgdegra@tycho.nsa.gov>,
Sirrix AG <tpmdd@sirrix.com>
Subject: Re: [TrouSerS-tech] [tpmdd-devel] [PATCH 09/13] tpm: Pull everything related to sysfs into tpm-sysfs.c
Date: Wed, 9 Oct 2013 11:38:48 -0600 [thread overview]
Message-ID: <20131009173847.GC18899@obsidianresearch.com> (raw)
In-Reply-To: <9F48E1A823B03B4790B7E6E69430724D2E99F4E9@EXCH2010A.sit.fraunhofer.de>
On Tue, Oct 08, 2013 at 09:15:55AM +0000, Fuchs, Andreas wrote:
> Rather than an ioctl, why not provide a different tpm-device per
> locality. This way, the access to the different localities can be
> restricted via standard user/group of the device. i.e. /dev/tpm0l1,
> /dev/tpm0l2, ... or similar approaches...
The way the TPM architecture is setup you will need the middle ware to
do the switching between localities and managing cross locality
resources, so it doesn't make sense for the kernel to export a
locality specific char device.
You'd have to do the above by having trousers create unix domain
sockets for each of the privilege levels and using the usual security
mechanisms to protect access to those sockets.
Jason
next prev parent reply other threads:[~2013-10-09 17:39 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-23 18:14 [PATCH 00/13] TPM cleanup Jason Gunthorpe
2013-09-23 18:14 ` [PATCH 01/13] tpm: ibmvtpm: Use %zd formatting for size_t format arguments Jason Gunthorpe
2013-10-01 21:58 ` Peter Hüwe
2013-10-02 19:37 ` [tpmdd-devel] " Ashley D Lai
2013-09-23 18:14 ` [PATCH 02/13] tpm atmel: Call request_region with the correct base Jason Gunthorpe
[not found] ` <201310020000.13490.PeterHuewe@gmx.de>
2013-10-03 0:11 ` [tpmdd-devel] " Ashley D Lai
2013-10-03 4:36 ` Jason Gunthorpe
2013-10-04 17:21 ` Joel Schopp
2013-09-23 18:14 ` [PATCH 03/13] tpm: xen-tpmfront: Fix default durations Jason Gunthorpe
2013-09-23 18:51 ` Konrad Rzeszutek Wilk
2013-09-23 18:57 ` Daniel De Graaf
2013-09-23 18:14 ` [PATCH 04/13] tpm: Store devname in the tpm_chip Jason Gunthorpe
2013-10-04 15:57 ` [tpmdd-devel] " Ashley Lai
2013-09-23 18:14 ` [PATCH 05/13] tpm: Use container_of to locate the tpm_chip in tpm_open Jason Gunthorpe
2013-10-05 1:47 ` [tpmdd-devel] " Ashley Lai
2013-09-23 18:14 ` [PATCH 06/13] tpm: Remove redundant dev_set_drvdata Jason Gunthorpe
2013-10-05 2:14 ` [tpmdd-devel] " Ashley Lai
2013-09-23 18:14 ` [PATCH 07/13] tpm: Remove tpm_show_caps_1_2 Jason Gunthorpe
[not found] ` <201310020009.22952.PeterHuewe@gmx.de>
2013-10-01 22:21 ` Jason Gunthorpe
2013-10-01 22:38 ` [tpmdd-devel] " Peter Hüwe
2013-09-23 18:14 ` [PATCH 08/13] tpm: Pull everything related to /dev/tpmX into tpm-dev.c Jason Gunthorpe
2013-10-01 22:52 ` Peter Hüwe
2013-10-01 22:57 ` Jason Gunthorpe
2013-10-01 23:14 ` Peter Hüwe
2013-10-01 23:23 ` Jason Gunthorpe
2013-10-03 5:05 ` Jason Gunthorpe
2013-10-04 15:50 ` TPM.ko module rename (was tpm: Pull everything related to /dev/tpmX into tpm-dev.c) Peter Hüwe
2013-10-04 16:28 ` Jason Gunthorpe
2013-10-04 16:45 ` Ashley Lai
2013-09-23 18:14 ` [PATCH 09/13] tpm: Pull everything related to sysfs into tpm-sysfs.c Jason Gunthorpe
2013-09-23 18:54 ` [tpmdd-devel] " Daniel De Graaf
2013-09-23 19:36 ` Jason Gunthorpe
2013-09-23 20:20 ` Daniel De Graaf
2013-09-23 20:42 ` Jason Gunthorpe
2013-09-23 22:00 ` Daniel De Graaf
2013-09-23 22:23 ` Jason Gunthorpe
2013-09-24 14:28 ` Daniel De Graaf
2013-09-30 18:10 ` Jason Gunthorpe
2013-09-30 20:36 ` Daniel De Graaf
2013-09-30 21:20 ` Jason Gunthorpe
2013-09-30 22:09 ` Joel Schopp
2013-10-04 17:08 ` Jason Gunthorpe
2013-10-04 19:17 ` Stefan Berger
2013-10-04 22:02 ` Peter Hüwe
2013-10-07 15:06 ` Daniel De Graaf
2013-10-08 9:15 ` AW: [TrouSerS-tech] " Fuchs, Andreas
2013-10-09 17:38 ` Jason Gunthorpe [this message]
2013-10-10 7:42 ` Fuchs, Andreas
2013-10-10 16:50 ` Jason Gunthorpe
2013-09-23 18:14 ` [PATCH 10/13] tpm: Create a tpm_class_ops structure and use it in the drivers Jason Gunthorpe
2013-09-23 18:14 ` [PATCH 11/13] tpm: Use the ops structure instead of a copy in tpm_vendor_specific Jason Gunthorpe
2013-09-23 18:14 ` [PATCH 12/13] tpm: st33: Remove chip->data_buffer access from this driver Jason Gunthorpe
2013-09-23 18:14 ` [PATCH 13/13] tpm: Make tpm-dev allocate a per-file structure Jason Gunthorpe
2013-09-23 21:27 ` [tpmdd-devel] [PATCH 00/13] TPM cleanup Joel Schopp
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