[Xen-devel] one question to p2m table entry type

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

Tim/Keir, I noticed that when translatiing p2m table type and p2m pte entry 
flags, there are difference handling for x86_64 and x32 like:

in p2m_type_to_flags:
#ifdef __x86_64__
    flags = (unsigned long)(t & 0x3fff) << 9;
#else
    flags = (t & 0x7UL) << 9;
#endif

in p2m_flags_to_type:
    /* Type is stored in the "available" bits */
#ifdef __x86_64__
    return (flags >> 9) & 0x3fff;
#else
    return (flags >> 9) & 0x7;

But since we don't support pure 32 bit xen hypervisor any more, and for 32 PAE, 
we are sure have enough bit to keep these flags, why do we need these special 
handling? Are there any special reason for it?

Thanks
--jyh

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel