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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>
Tue, 31 Jul 2012 15:01:58 +0000 (11:01 -0400)
commitfe275a011d0c6d575d6598005ad8b47ff8633914
tree9baf4e97f44710aa42fa722e713471286c1f7815tree
parentdce49c5f870fb6ad8ca4af685caa0d3302364f67commit | diff
xen/mmu: Provide comments describing the _ka and _va aliasing issue

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>
(cherry picked from commit 26e694dc644c36641d6d73585400caa1f015e1fd)
arch/x86/xen/mmu.c diff | blob | history
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