linux-kernel - Re: [PATCH] VMD: Attach vmd resources to parent domain's resource tree

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Date:	Tue, 23 Feb 2016 23:16:11 +0000
From:	Keith Busch <keith.busch@...el.com>
To:	Jon Derrick <jonathan.derrick@...el.com>
Cc:	helgaas@...nel.org, linux-kernel@...r.kernel.org, x86@...nel.org,
	bryan.e.veal@...el.com, linux-pci@...r.kernel.org,
	tglx@...utronix.de, dan.j.williams@...el.com
Subject: Re: [PATCH] VMD: Attach vmd resources to parent domain's resource
 tree

On Tue, Feb 23, 2016 at 02:50:13PM -0700, Jon Derrick wrote:
> This patch attaches the new VMD domain's resources to the VMD device's
> resources. This allows /proc/iomem to display a more complete picture.
> 
> Before:
>   c0000000-c1ffffff : 0000:5d:05.5
>   c2000000-c3ffffff : 0000:5d:05.5
>     c2010000-c2013fff : nvme
>   c4000000-c40fffff : 0000:5d:05.5
> 
> After:
>   c0000000-c1ffffff : 0000:5d:05.5
>     c0000000-0000001f : VMD CFGBAR
>   c2000000-c3ffffff : 0000:5d:05.5
>     c2000000-c3ffffff : VMD MEMBAR1
>       c2000000-c22fffff : PCI Bus 10000:01
>         c2000000-c200ffff : 10000:01:00.0
>         c2010000-c2013fff : 10000:01:00.0
>           c2010000-c2013fff : nvme
>       c2300000-c24fffff : PCI Bus 10000:01
>   c4000000-c40fffff : 0000:5d:05.5
>     c4002000-c40fffff : VMD MEMBAR2

I think we should drop the CFGBAR from here since that's a bus resource
rather than IO memory. Otherwise, this looks good and useful.

I think in the near future we should come up with a better name than
"VMD MEMBAR" to help distinguish multiple VMD's in a system.