Groups > linux.kernel > #1198902

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

From	Joerg Roedel <joro@8bytes.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 2/2] iommu/vt-d: Report superpage support in sysfs
Date	2015-08-03 16:40 +0200
Message-ID	<pTp4e-5QN-35@gated-at.bofh.it> (permalink)
References	<pMfW1-3UL-3@gated-at.bofh.it> <pMfW1-3UL-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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@redhat.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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Re: [PATCH 2/2] iommu/vt-d: Report superpage support in sysfs Joerg Roedel <joro@8bytes.org> - 2015-08-03 16:40 +0200
  Re: [PATCH 2/2] iommu/vt-d: Report superpage support in sysfs David Woodhouse <dwmw2@infradead.org> - 2015-08-03 16:40 +0200
  Re: [PATCH 2/2] iommu/vt-d: Report superpage support in sysfs Alex Williamson <alex.williamson@redhat.com> - 2015-08-03 17:10 +0200

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