linux-kernel - Re: [PATCH v9 4/5] x86/PCI: Enable a 64bit BAR on AMD Family 15h (Models 30h-3fh) Processors v5

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Message-ID: <cb0d5830-11dd-57b8-606b-7eca560cfcc7@oracle.com>
Date:   Tue, 28 Nov 2017 13:55:58 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Christian König <christian.koenig@....com>,
        helgaas@...nel.org, linux-pci@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, xen-devel <xen-devel@...ts.xen.org>
Subject: Re: [PATCH v9 4/5] x86/PCI: Enable a 64bit BAR on AMD Family 15h
 (Models 30h-3fh) Processors v5

On 11/28/2017 04:12 AM, Christian König wrote:
>
>
> How about the attached patch? It limits the newly added MMIO space to
> the upper 256GB of the address space. That should still be enough for
> most devices, but we avoid both issues with Xen dom0 as most likely
> problems with memory hotplug as well.

It certainly makes the problem to be less likely so I guess we could do
this for now.

Thanks.
-boris