linux-kernel - Re: [PATCH 2/2] iommu/vt-d: Report superpage support in sysfs

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Message-ID: <20150803143029.GD20968@8bytes.org>
Date:	Mon, 3 Aug 2015 16:30:29 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Alex Williamson <alex.williamson@...hat.com>
Cc:	iommu@...ts.linux-foundation.org, dwmw2@...radead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] iommu/vt-d: Report superpage support in sysfs

On Tue, Jul 14, 2015 at 03:25:04PM -0600, Alex Williamson wrote:
> We already have the VT-d capability register printed raw, but it
> typically involves a trip to the code or the spec to figure out
> whether superpages are supported.  Make this easier with "2M_pages"
> and "1G_pages" sysfs entries that clearly report Y/N.
> 
> Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
> ---
>  drivers/iommu/intel-iommu.c |   22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)

Can we make this a generic entry for all iommu types and export a
pagesize bitmap instead?


	Joerg

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