linux-kernel - Re: [PATCH kernel v11 21/34] powerpc/powernv/ioda2: Add TCE invalidation for all attached groups

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Message-ID: <20150601064922.GM22789@voom.redhat.com>
Date:	Mon, 1 Jun 2015 16:49:22 +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 21/34] powerpc/powernv/ioda2: Add TCE
 invalidation for all attached groups

On Fri, May 29, 2015 at 06:44:45PM +1000, Alexey Kardashevskiy wrote:
> The iommu_table struct keeps a list of IOMMU groups it is used for.
> At the moment there is just a single group attached but further
> patches will add TCE table sharing. When sharing is enabled, TCE cache
> in each PE needs to be invalidated so does the patch.
> 
> This does not change pnv_pci_ioda1_tce_invalidate() as there is no plan
> to enable TCE table sharing on PHBs older than IODA2.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>

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

-- 
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