From: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
Cc: dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: [PATCH v5 4/5] Initialize TPM and get durations and timeouts
Date: Wed, 10 Feb 2016 05:56:20 +0200 [thread overview]
Message-ID: <20160210035620.GB7161@intel.com> (raw)
In-Reply-To: <20160209165228.GA14611-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
On Tue, Feb 09, 2016 at 09:52:28AM -0700, Jason Gunthorpe wrote:
> On Tue, Feb 09, 2016 at 11:19:15AM -0500, Stefan Berger wrote:
> > Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> wrote on 02/09/2016 12:33:23
> > AM:
> >
> >
> > >
> > > On Mon, Feb 08, 2016 at 02:27:07PM -0500, Stefan Berger wrote:
> > > > Add the retrieval of TPM 1.2 durations and timeouts. Since this requires
> > > > the startup of the TPM, do this for TPM 1.2 and TPM 2.
> > > >
> > > > To not allow to interleave with commands from user space, so send the
> > > > TPM_Startup as the first command. The timeouts can then be gotten at any
> > > > later time, even interleaved with commands from user space.
> > >
> > > Do not call tpm_register until get_timeouts has completed and this
> > > will naturally be avoided the same way every other TPM driver does.
> >
> > Getting the timeouts cannot complete before the TPM emulator has started, which
> > in turn cannot start before the ioctl returns. We don't know whether user space
> > starts a client first on /dev/tpm1 or the TPM emulator starts first on the file
> > descriptor. We can control which command gets *queued* for the TPM emulator and
> > that's what I am doing by having the kernel queue the startup command first.
>
> I keep saying this same solution - start a work queue just before the
> ioctl returns and do the get_timeouts and registration in there.
*Maybe* it would be worth to check David's patch:
https://github.com/PeterHuewe/linux-tpmdd/commit/9329f13c403daf1f4bd1e715d2ba0866e089fb1d
/Jarkko
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next prev parent reply other threads:[~2016-02-10 3:56 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-08 19:27 [PATCH v5 0/5] Multi-instance vTPM driver Stefan Berger
[not found] ` <1454959628-30582-1-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2016-02-08 19:27 ` [PATCH v5 1/5] Implement tpm_chip_free Stefan Berger
[not found] ` <1454959628-30582-2-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2016-02-09 5:28 ` Jason Gunthorpe
2016-02-08 19:27 ` [PATCH v5 2/5] Implement driver for supporting multiple emulated TPMs Stefan Berger
2016-02-08 19:27 ` [PATCH v5 3/5] Make tpm_startup() available Stefan Berger
[not found] ` <1454959628-30582-4-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2016-02-09 5:29 ` Jason Gunthorpe
[not found] ` <20160209052957.GC12657-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-09 11:22 ` Stefan Berger
2016-02-08 19:27 ` [PATCH v5 4/5] Initialize TPM and get durations and timeouts Stefan Berger
[not found] ` <1454959628-30582-5-git-send-email-stefanb-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2016-02-09 5:33 ` Jason Gunthorpe
[not found] ` <20160209053323.GD12657-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-09 16:19 ` Stefan Berger
[not found] ` <201602091626.u19GQpga021574@d01av02.pok.ibm.com>
[not found] ` <201602091626.u19GQpga021574-prK0F/7GlgzImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-09 16:52 ` Jason Gunthorpe
[not found] ` <20160209165228.GA14611-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-09 17:45 ` Stefan Berger
2016-02-10 3:56 ` Jarkko Sakkinen [this message]
[not found] ` <20160210035620.GB7161-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-02-10 5:15 ` Stefan Berger
[not found] ` <201602100515.u1A5FonT015847@d03av04.boulder.ibm.com>
[not found] ` <201602100515.u1A5FonT015847-2xHzGjyANq4+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-10 8:12 ` Jarkko Sakkinen
[not found] ` <201602100515.u1A5FpFi002736@d03av02.boulder.ibm.com>
[not found] ` <201602100515.u1A5FpFi002736-nNA/7dmquNI+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-10 16:28 ` Jason Gunthorpe
[not found] ` <20160210162809.GB20730-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-10 21:45 ` Stefan Berger
[not found] ` <201602102145.u1ALjSAs001597@d03av04.boulder.ibm.com>
[not found] ` <201602102145.u1ALjSAs001597-2xHzGjyANq4+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-10 22:23 ` Jason Gunthorpe
[not found] ` <20160210222313.GA7047-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-11 0:38 ` Stefan Berger
[not found] ` <201602110038.u1B0cuE0030670@d03av05.boulder.ibm.com>
[not found] ` <201602110038.u1B0cuE0030670-3MP/CPU4Muo+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-11 7:04 ` Jarkko Sakkinen
[not found] ` <20160211070426.GB9307-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-02-11 15:24 ` Stefan Berger
[not found] ` <201602111521.u1BFLS3f007520-8DuMPbUlb4HImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-11 16:51 ` Stefan Berger
[not found] ` <201602111534.u1BFYvRs019573@d01av03.pok.ibm.com>
[not found] ` <201602111534.u1BFYvRs019573-CUdSWdNILC7ImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-11 18:12 ` Jason Gunthorpe
[not found] ` <20160211181208.GA6285-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-11 19:10 ` Stefan Berger
[not found] ` <201602111911.u1BJB2nK017410@d01av03.pok.ibm.com>
[not found] ` <201602111911.u1BJB2nK017410-CUdSWdNILC7ImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-11 19:48 ` Jason Gunthorpe
[not found] ` <20160211194810.GA24211-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-11 22:10 ` Stefan Berger
[not found] ` <201602112210.u1BMAYPe015452@d03av01.boulder.ibm.com>
[not found] ` <201602112210.u1BMAYPe015452-Rn83F4s8Lwc+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-11 22:18 ` Jason Gunthorpe
[not found] ` <20160211221822.GA16304-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-11 22:26 ` Stefan Berger
[not found] ` <201602112226.u1BMQZ59031657@d01av02.pok.ibm.com>
[not found] ` <201602112226.u1BMQZ59031657-prK0F/7GlgzImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-11 23:56 ` Jason Gunthorpe
[not found] ` <20160211235611.GB16304-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-12 3:56 ` Stefan Berger
[not found] ` <201602120356.u1C3usEe002034-2xHzGjyANq4+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-12 18:13 ` Stefan Berger
[not found] ` <201602121813.u1CIDu4O015272@d01av01.pok.ibm.com>
[not found] ` <201602121813.u1CIDu4O015272-4ZtxiNBBw+3ImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-12 18:34 ` Jason Gunthorpe
[not found] ` <20160212183415.GA4289-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-14 6:37 ` Stefan Berger
[not found] ` <201602140637.u1E6baNX028563-2xHzGjyANq4+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-16 16:44 ` Stefan Berger
[not found] ` <201602161648.u1GGmdZv000468@d01av03.pok.ibm.com>
[not found] ` <201602161648.u1GGmdZv000468-CUdSWdNILC7ImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-16 18:00 ` Jason Gunthorpe
[not found] ` <20160216180028.GA4967-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-16 19:26 ` Stefan Berger
[not found] ` <201602161927.u1GJRJL6016216@d01av01.pok.ibm.com>
[not found] ` <201602161927.u1GJRJL6016216-4ZtxiNBBw+3ImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-17 4:47 ` Jason Gunthorpe
[not found] ` <20160217044750.GB25049-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-18 3:52 ` Stefan Berger
[not found] ` <201602120353.u1C3rYif023135@d01av05.pok.ibm.com>
[not found] ` <201602120353.u1C3rYif023135-8DuMPbUlb4HImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-12 18:40 ` Jason Gunthorpe
[not found] ` <20160212184051.GB4289-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-12 20:31 ` Stefan Berger
[not found] ` <201602122031.u1CKVIOp028400@d03av03.boulder.ibm.com>
[not found] ` <201602122031.u1CKVIOp028400-MijUUJkLaQs+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-12 20:39 ` Jason Gunthorpe
[not found] ` <20160212203956.GB10540-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-12 20:44 ` Stefan Berger
[not found] ` <201602122044.u1CKiMbR023495@d03av03.boulder.ibm.com>
[not found] ` <201602122044.u1CKiMbR023495-MijUUJkLaQs+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-12 21:15 ` Jason Gunthorpe
[not found] ` <20160212211538.GA20737-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-12 22:23 ` Stefan Berger
[not found] ` <201602122223.u1CMNJXl023711-4ZtxiNBBw+3ImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-12 22:47 ` Stefan Berger
[not found] ` <201602122247.u1CMlFni023527@d03av04.boulder.ibm.com>
[not found] ` <201602122247.u1CMlFni023527-2xHzGjyANq4+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-12 23:19 ` Jason Gunthorpe
[not found] ` <201602122223.u1CMNKL2004615@d03av02.boulder.ibm.com>
[not found] ` <201602122223.u1CMNKL2004615-nNA/7dmquNI+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-12 22:46 ` Jason Gunthorpe
[not found] ` <20160212224642.GA4781-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-12 23:14 ` Stefan Berger
[not found] ` <201602122314.u1CNEk6P028695@d01av01.pok.ibm.com>
[not found] ` <201602122314.u1CNEk6P028695-4ZtxiNBBw+3ImUpY6SP3GEEOCMrvLtNR@public.gmane.org>
2016-02-12 23:21 ` Jason Gunthorpe
[not found] ` <201602091745.u19HjeEv001740@d03av02.boulder.ibm.com>
[not found] ` <201602091745.u19HjeEv001740-nNA/7dmquNI+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-09 18:01 ` Jason Gunthorpe
[not found] ` <20160209180152.GA17475-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-09 18:11 ` Stefan Berger
[not found] ` <201602091812.u19ICTww018943@d03av01.boulder.ibm.com>
[not found] ` <201602091812.u19ICTww018943-Rn83F4s8Lwc+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-09 18:20 ` Jason Gunthorpe
[not found] ` <20160209182013.GA19018-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-02-09 19:22 ` Stefan Berger
[not found] ` <201602091922.u19JMQ6r025254@d03av05.boulder.ibm.com>
[not found] ` <201602091922.u19JMQ6r025254-3MP/CPU4Muo+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
2016-02-09 19:36 ` Jason Gunthorpe
2016-02-08 19:27 ` [PATCH v5 5/5] A test program for vTPM device creation Stefan Berger
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