From: Pavel Machek <pavel@ucw.cz>
To: Sinan Kaya <okaya@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-pci@vger.kernel.org, timur@codeaurora.org,
linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Jonathan Corbet <corbet@lwn.net>,
Bjorn Helgaas <bhelgaas@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>,
Christoffer Dall <cdall@linaro.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Kai-Heng Feng <kai.heng.feng@canonical.com>,
Thymo van Beers <thymovanbeers@gmail.com>,
Frederic Weisbecker <frederic@kernel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
David Rientjes <rientjes@google.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Keith Busch <keith.busch@intel.com>,
Dongdong Liu <liudongdong3@huawei.com>,
Frederick Lawler <fred@fredlawl.com>,
Oza Pawandeep <poza@codeaurora.org>,
Gabriele Paoloni <gabriele.paoloni@huawei.com>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] PCI: Add pci=safemode option
Date: Sat, 2 Jun 2018 19:43:07 +0200 [thread overview]
Message-ID: <20180602174307.GB14870@amd> (raw)
In-Reply-To: <6c317ed8-cca3-8862-5f3b-12cf14e4d53b@codeaurora.org>
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Hi!
> > And you should explain what exactly in PCI is "optional". Who defines
> > this and where is that list and what can go wrong if those options are
> > not enabled?
>
> Bjorn and I discussed the need for such a "safe" mode feature when you
> want to bring up PCI for a platform. You want to turn off everything as
> a starter and just stick to bare minimum.
>
> I can add a few words describing them. The goal of this option is to keep
> base PCI features with MSI only. Things like PME, AER, ASPM, Extended
> Tags, LTR, Relaxed Ordering, SRIOV are all considered optional. safemode
> is certainly not intended for production environments.
>
> I can taint the kernel as a suggestion.
I don't think tainting is required. even modern platforms should work
in the safe mode.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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next prev parent reply other threads:[~2018-06-02 17:43 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-30 3:19 [PATCH] PCI: Add pci=safemode option Sinan Kaya
2018-05-30 4:31 ` Greg Kroah-Hartman
2018-05-30 4:41 ` Sinan Kaya
2018-05-30 4:55 ` Greg Kroah-Hartman
2018-05-30 7:37 ` Christoph Hellwig
2018-05-30 7:44 ` okaya
2018-05-30 7:48 ` Greg Kroah-Hartman
2018-05-30 7:56 ` okaya
2018-05-30 8:22 ` okaya
2018-05-30 14:56 ` Bjorn Helgaas
2018-05-30 15:28 ` Sinan Kaya
2018-06-02 17:43 ` Pavel Machek [this message]
2018-06-02 17:57 ` okaya
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