KVM: MMU: Make cmpxchg_gpte aware of nesting too

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This patch makes the cmpxchg_gpte() function aware of the
difference between l1-gfns and l2-gfns when nested
virtualization is in use.  This fixes a potential
data-corruption problem in the l1-guest and makes the code
work correct (at least as correct as the hardware which is
emulated in this code) again.

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Roedel, Joerg 2011-04-20 15:33:16 +02:00 • committed by Avi Kivity

parent 13db70eca6

commit a78484c60e

1 changed files with 23 additions and 7 deletions

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arch/x86/kvm/paging_tmpl.h

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