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From: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
To: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>,
	coreboot@coreboot.org, grub-devel@gnu.org,
	trenchboot-devel@googlegroups.com, x86@kernel.org,
	u-boot@lists.denx.de,
	"systemd-devel@lists.freedesktop.org" 
	<systemd-devel@lists.freedesktop.org>,
	xen-devel@lists.xenproject.org, daniel.kiper@oracle.com,
	linux-kernel@vger.kernel.org
Cc: krystian.hebel@3mdeb.com, michal.zygowski@3mdeb.com,
	piotr.krol@3mdeb.com, mtottenh@akamai.com, luto@amacapital.net,
	dpsmith@apertussolutions.com, andrew.cooper3@citrix.com,
	roger.pau@citrix.com, allen.cryptic@gmail.com,
	btrotter@gmail.com, phcoder@gmail.com, lukasz.hawrylko@intel.com,
	ard.biesheuvel@linaro.org, tyhicks@linux.microsoft.com,
	pmenzel@molgen.mpg.de, hun@n-dimensional.de, leif@nuviainc.com,
	alexander.burmashev@oracle.com, eric.devolder@oracle.com,
	eric.snowberg@oracle.com, joao.m.martins@oracle.com,
	kanth.ghatraju@oracle.com, konrad.wilk@oracle.com,
	ross.philipson@oracle.com, javierm@redhat.com, pjones@redhat.com,
	alecb@umass.edu, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: Antw: [EXT] [systemd-devel] [SPECIFICATION RFC] The firmware and bootloader log specification
Date: Mon, 16 Nov 2020 09:57:25 +0100	[thread overview]
Message-ID: <2d920ff2-68cb-69f5-f2d9-47131ec1b512@prevas.dk> (raw)
In-Reply-To: <5FB223E8020000A10003CB88@gwsmtp.uni-regensburg.de>

On 16/11/2020 08.02, Ulrich Windl wrote:
>>>> Daniel Kiper <daniel.kiper@oracle.com> schrieb am 14.11.2020 um 00:52 in
> Nachricht <20201113235242.k6fzlwmwm2xqhqsi@tomti.i.net-space.pl>:
> ...
>> The members of struct bf_log_msg:
>>   ‑ size: total size of bf_log_msg struct,
>>   ‑ ts_nsec: timestamp expressed in nanoseconds starting from 0,
> 
> Who or what defines t == 0?

Some sort of "clapperboard" log entry, stating "the RTC says X, the
cycle counter is Y, the onboard ACME atomic clock says Z, I'm now
starting to count ts_nsec from W" might be useful for some eventual
userspace tool to try to stitch together the log entries from the
various stages. I have no idea how a formal spec of such an entry would
look like or if it's even feasible to do formally. But even just such
entries in free-form prose could at least help a human consumer.

Rasmus

  reply	other threads:[~2020-11-16  9:29 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-13 23:52 Daniel Kiper
2020-11-14  3:14 ` Randy Dunlap
2020-11-14 12:32 ` Nico Huber
2020-11-16  7:02 ` Antw: [EXT] [systemd-devel] " Ulrich Windl
2020-11-16  8:57   ` Rasmus Villemoes [this message]
2020-11-18 15:01 ` Heinrich Schuchardt
2020-12-03  1:17   ` Julius Werner
2020-12-04 12:52     ` Wim Vervoorn
2020-12-04 13:23       ` Paul Menzel
2020-12-07 21:50         ` Tom Rini
2020-12-09  5:41         ` Frank Rowand
2020-12-03 16:31 ` Andy Shevchenko
2020-12-15 20:25 ` Simon Glass

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