From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Stefan Berger <stefanb-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org
Subject: Re: [PATCH v5 4/5] Initialize TPM and get durations and timeouts
Date: Tue, 9 Feb 2016 11:20:13 -0700 [thread overview]
Message-ID: <20160209182013.GA19018@obsidianresearch.com> (raw)
In-Reply-To: <201602091812.u19ICTww018943-Rn83F4s8Lwc+UXBhvPuGgqsjOiXwFzmk@public.gmane.org>
On Tue, Feb 09, 2016 at 01:11:58PM -0500, Stefan Berger wrote:
> :-( User space will just pass the fd to another process, which is the TPM
> emulator, and that thing then starts failing on the broken file descriptor.
.. and then it exits like any other failure and the caller has to sort
it out, which it already has to handle.
> Either way, I don't see how the TPM emulator can be fully operational before
> tpm_chip_register() is called.
You still haven't said what is wrong with doing all the work in a work
queue so user space can respond normally without all this ugly hacking.
> So far the code allows to start a TPM emulator on the file descript
> 'late'.
That breaks our invariants to user space. The /dev/tpmX, etc cannot appear
until get_timeouts/etc complete. This isn't optional. Ordering startup
isn't sufficient.
Jason
------------------------------------------------------------------------------
Site24x7 APM Insight: Get Deep Visibility into Application Performance
APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month
Monitor end-to-end web transactions and take corrective actions now
Troubleshoot faster and improve end-user experience. Signup Now!
http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
next prev parent reply other threads:[~2016-02-09 18:20 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
[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 [this message]
[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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160209182013.GA19018@obsidianresearch.com \
--to=jgunthorpe-epgobjl8dl3ta4ec/59zmfatqe2ktcn/@public.gmane.org \
--cc=dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org \
--cc=stefanb-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org \
--cc=tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).