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[Xen-devel] How can i get VA from a pfn in HVM guest

To: xen-devel@xxxxxxxxxxxxxxxxxxx
From: èåé <sunofblack@xxxxxxxx>
Date: Fri, 6 Aug 2010 07:39:56 +0800 (CST)
Delivery-date: Thu, 05 Aug 2010 16:42:02 -0700
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List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Hi,

After i get the pfn in a hvm guest using following code, how can i use it? Simply using __va() seems wrong, for the ( param.value << PAGE_SHIFT ) is feffc000 in my test module, using __va() will overflow.

    xen_hvm_param_t param;
    param.domid = DOMID_SELF;
    param.index = HVM_PARAM_STORE_PFN;
    hypercall_hvm_op(HVMOP_get_param, &param);

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