KVM: MMU: invalidate and flush on spte small->large page size change

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Always invalidate spte and flush TLBs when changing page size, to make
sure different sized translations for the same address are never cached
in a CPU's TLB.

Currently the only case where this occurs is when a non-leaf spte pointer is
overwritten by a leaf, large spte entry. This can happen after dirty
logging is disabled on a memslot, for example.

Noticed by Andrea.

KVM-Stable-Tag
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

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Marcelo Tosatti 2010-05-28 09:44:59 -03:00 • committed by Avi Kivity

parent 67ec660777

commit 3be2264be3

1 changed files with 2 additions and 0 deletions

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arch/x86/kvm/mmu.c

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