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[Xen-devel] Memory mapping query on Xen

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: "Girish Shirasat" <girish.shirasat@xxxxxxxxxxxxxx>
  • Date: Fri, 4 May 2007 07:30:57 +0100
  • Delivery-date: Wed, 09 May 2007 10:17:33 -0700
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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.
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