linux-kernel - Re: [BISECTED] v4.15-rc: Boot regression on x86

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Message-ID: <773c150c-a9e6-1246-50ee-2c468490db95@amd.com>
Date:   Wed, 10 Jan 2018 13:29:22 +0100
From:   Christian König <christian.koenig@....com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-pci@...r.kernel.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Alex Deucher <alexander.deucher@....com>,
        David Airlie <airlied@...ux.ie>
Subject: Re: [BISECTED] v4.15-rc: Boot regression on x86_64/AMD

Am 09.01.2018 um 19:38 schrieb Bjorn Helgaas:
> I don't like to add new parameters because I think it's an
> unreasonable burden on users and it makes it hard for distros, but I
> understand the desire to use this functionality.  What would you think
> of adding a "pci=big_root_window" parameter that logs an info message
> and taints the kernel with TAINT_FIRMWARE_WORKAROUND?  Then there's at
> least some clue that we're in uncharted territory.

Done, patches for this are in your inbox.

Additionally to that I cleaned up the 256GB patch a bit more, e.g. added 
a comment where the 0xfd00000000 limit comes from and updated the commit 
message.

Please review and/or comment,
Christian.