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xen/mmu: Provide comments describing the _ka and _va aliasing issue
authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Thu, 12 Jul 2012 17:55:25 +0000 (13:55 -0400)
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Thu, 23 Aug 2012 15:33:29 +0000 (11:33 -0400)
Which is that the level2_kernel_pgt (__ka virtual addresses)
and level2_ident_pgt (__va virtual address) contain the same
PMD entries. So if you modify a PTE in __ka, it will be reflected
in __va (and vice-versa).

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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