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[Xen-devel] [PATCH] amd iommu: Automatic page coalescing

from [Wei Wang2]

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Subject:	[Xen-devel] [PATCH] amd iommu: Automatic page coalescing
From:	Wei Wang2 <wei.wang2@xxxxxxx>
Date:	Fri, 12 Aug 2011 14:25:26 +0200
Cc:	Keir Fraser <keir@xxxxxxx>
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Hi,
This patch implements automatic page coalescing when separated io page table 
is used. It uses ignore bits in iommu pde to cache how many entries lower 
next page level are suitable for coalescing and then builds a super page 
entry when all lower entries are contiguous.  This patch has been tested OK 
for weeks mainly with graphic devices and 3D mark vantage.
Thanks
Wei

Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>
--
Advanced Micro Devices GmbH
Sitz: Dornach, Gemeinde Aschheim, 
Landkreis München Registergericht München, 
HRB Nr. 43632 WEEE Registrierungsnummer 129 19551
Geschäftsführer:
Alberto Bozzo

iommu_spage.patch
Description: iommu_spage.patch

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