xen/mmu: Provide comments describing the _ka and _va aliasing issue

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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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Konrad Rzeszutek Wilk 2012-07-12 13:55:25 -04:00

parent 3699aad047

commit 4fac153a7a

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arch/x86/xen/mmu.c

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