linux-kernel - Re: [PATCH] PCI: Make SR-IOV capable GPU working on the SR-IOV incapable platform

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Message-ID: <20170524085712.4947e575@w520.home>
Date:   Wed, 24 May 2017 08:57:12 -0600
From:   Alex Williamson <alex.williamson@...hat.com>
To:     "Cheng, Collins" <Collins.Cheng@....com>
Cc:     Alexander Duyck <alexander.duyck@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Zytaruk, Kelly" <Kelly.Zytaruk@....com>,
        Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH] PCI: Make SR-IOV capable GPU working on the SR-IOV
 incapable platform

On Wed, 24 May 2017 08:57:53 +0000
"Cheng, Collins" <Collins.Cheng@....com> wrote:

> Hi Alex,
> 
> How do you know "particular this system offers no 64-bit MMIO", from dmesg log?

>From this:

> [    0.891319] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7 window]
> [    0.891321] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff window]
> [    0.891322] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
> [    0.891323] pci_bus 0000:00: root bus resource [mem 0x88800000-0xdfffffff window]
> [    0.891324] pci_bus 0000:00: root bus resource [mem 0xfd000000-0xfe7fffff window]
> [    0.891325] pci_bus 0000:00: root bus resource [bus 00-fe]

There are only 32-bit ranges listed.  Thanks,

Alex