From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bjorn Helgaas <helgaas@kernel.org>
Subject: Re: Some Alphas broken by f75b99d5a77d (PCI: Enforce bus address
 limits in resource allocation)
Date: Sat, 22 Feb 2020 10:55:56 -0600
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To: Matt Turner <mattst88@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>, linux-pci@vger.kernel.org, linux-alpha <linux-alpha@vger.kernel.org>, Richard Henderson <rth@twiddle.net>, Ivan Kokshaysky <ink@jurassic.park.msu.ru>, Jay Estabrook <jay.estabrook@gmail.com>

On Mon, Apr 16, 2018 at 07:33:57AM -0700, Matt Turner wrote:
> Commit f75b99d5a77d63f20e07bd276d5a427808ac8ef6 (PCI: Enforce bus
> address limits in resource allocation) broke Alpha systems using
> CONFIG_ALPHA_NAUTILUS. Alpha is 64-bit, but Nautilus systems use a
> 32-bit AMD 751/761 chipset. arch/alpha/kernel/sys_nautilus.c maps PCI
> into the upper addresses just below 4GB.
> 
> I can get a working kernel by ifdef'ing out the code in
> drivers/pci/bus.c:pci_bus_alloc_resource. We can't tie
> PCI_BUS_ADDR_T_64BIT to ALPHA_NAUTILUS without breaking generic
> kernels.
> 
> How can we get Nautilus working again?

I don't see a resolution in this thread, so I assume this is still
broken?  Anybody have any more ideas?

Bjorn