[Xen-devel] [PATCH] Inclusing memory mapping param for dom0 iommu mappings

[Ross Philipson <Ross.Philipson@xxxxxxxxxx>]

OK, cut two of the iommu reserved memory issue patch as we discussed...

 

This patch adds a boolean boot parameter to xen to allow inclusive

mapping of all memory below 4GB to the iommu mappings for dom0. The

unusable ranges and memory occupied by xen are still excluded. The

parameter is “iommu_inclusive_mapping=1” and is off by default. In

addition to the parameter, a warning is also traced when incorrect

RMRR to system memory map values are detected. These are being added

to address some incorrect BIOS's that do not report correctly the

requied reserved memory ranges in the RMRRs. When this occurs it

currently can cause early boot hangs and crashes.

 

Signed-off-by: Ross Philipson <ross.philipson@xxxxxxxxxx>

 

Based on changeset 19243

 

Thanks

Ross

 

 

Ross Philipson

Senior Software Engineer

Citrix Systems, Inc

14 Crosby Drive

Bedford, MA 01730

781-301-7949

ross.philipson@xxxxxxxxxx

 

Attachment: iommu_inclusive_mapping.patch
Description: iommu_inclusive_mapping.patch

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