linux-kernel - Re: [PATCH kernel v8 06/31] vfio: powerpc/spapr: Disable DMA mappings on disabled container

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Message-ID: <20150415070522.GH25040@voom.redhat.com>
Date:	Wed, 15 Apr 2015 17:05:22 +1000
From:	David Gibson <david@...son.dropbear.id.au>
To:	Alexey Kardashevskiy <aik@...abs.ru>
Cc:	linuxppc-dev@...ts.ozlabs.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Alex Williamson <alex.williamson@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH kernel v8 06/31] vfio: powerpc/spapr: Disable DMA
 mappings on disabled container

On Fri, Apr 10, 2015 at 04:30:48PM +1000, Alexey Kardashevskiy wrote:
> At the moment DMA map/unmap requests are handled irrespective to
> the container's state. This allows the user space to pin memory which
> it might not be allowed to pin.
> 
> This adds checks to MAP/UNMAP that the container is enabled, otherwise
> -EPERM is returned.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>

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

-- 
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