[Xen-devel] Memory mapping query on Xen

["Girish Shirasat" <girish.shirasat@xxxxxxxxxxxxxx>]

Hello Folks,

   I am very new to Xen hence forgive me if this is a naive qn. On my board I have 1 GB of Ram. When Xen

launches Domain0 ie Linux , I reserved some high mem region for my driver usage. When I tried to access the

reseved high memory region for my driver using ioremap it failed. Can anybody please help me understand what 

could me the problem out here. When i used the mfn_to_virt for the first address of the reserved memory , i did get 

a virtual address and was able to write for 2 pages only. Also the high mem start which was histrocially set to 896MB

has been moved to 728MB. I would appreciate for any pointers on this.

 

Girish

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