linux-kernel - Re: [PATCH] vfio powerpc: enabled on powernv platform

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Date:	Thu, 13 Dec 2012 17:27:41 +1100
From:	Alexey Kardashevskiy <aik@...abs.ru>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:	Alex Williamson <alex.williamson@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, David Gibson <david@...son.dropbear.id.au>
Subject: Re: [PATCH] vfio powerpc: enabled on powernv platform

On 13/12/12 13:29, Benjamin Herrenschmidt wrote:
> On Wed, 2012-12-12 at 07:34 -0700, Alex Williamson wrote:
>>> But what would I put there?... IOMMU ID is more than enough at the moment
>>> and struct iommu_table does not have anything what would have made sense to
>>> show in the sysfs...
>>
>> I believe David mentioned that PEs had user visible names.  Perhaps they
>> match an enclosure location or something.  Group numbers are rather
>> arbitrary and really have no guarantee of persistence.  Thanks,
>
> I agree. Make up something, for example domain[PE] or something like
> that.

To be able to add a PE number, I need to call iommu_group_alloc() in the 
correct place where I know this number OR I have to carry it in iommu_table 
till the moment the iommu_group_alloc() is called (acceptable but not cool).

I will post a patch which would help as a response to this mail.


-- 
Alexey
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