linux-kernel - Re: [PATCH kernel v11 30/34] powerpc/iommu/ioda2: Add get_table_size() to calculate the size of future table

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Message-ID: <20150602005449.GC3186@voom.fritz.box>
Date:	Tue, 2 Jun 2015 10:54:49 +1000
From:	David Gibson <david@...son.dropbear.id.au>
To:	Alexey Kardashevskiy <aik@...abs.ru>
Cc:	linuxppc-dev@...ts.ozlabs.org,
	Alex Williamson <alex.williamson@...hat.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Gavin Shan <gwshan@...ux.vnet.ibm.com>,
	Paul Mackerras <paulus@...ba.org>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH kernel v11 30/34] powerpc/iommu/ioda2: Add
 get_table_size() to calculate the size of future table

On Fri, May 29, 2015 at 06:44:54PM +1000, Alexey Kardashevskiy wrote:
> This adds a way for the IOMMU user to know how much a new table will
> use so it can be accounted in the locked_vm limit before allocation
> happens.
> 
> This stores the allocated table size in pnv_pci_ioda2_get_table_size()
> so the locked_vm counter can be updated correctly when a table is
> being disposed.
> 
> This defines an iommu_table_group_ops callback to let VFIO know
> how much memory will be locked if a table is created.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>

Reviewed-by: David Gibson <david@...son.dropbear.id.au>

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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