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KVM: MMU: do not write-protect large mappings
authorMarcelo Tosatti <mtosatti@redhat.com>
Tue, 23 Sep 2008 16:18:32 +0000 (13:18 -0300)
committerAvi Kivity <avi@redhat.com>
Wed, 15 Oct 2008 12:25:18 +0000 (14:25 +0200)
commit38187c830cab84daecb41169948467f1f19317e3
treee2566ec17957f604db89ae0f580aa94f80bad592tree | snapshot
parenta378b4e64c0fef2d9e53214db167878b7673a7a3commit | diff
KVM: MMU: do not write-protect large mappings

There is not much point in write protecting large mappings. This
can only happen when a page is shadowed during the window between
is_largepage_backed and mmu_lock acquision. Zap the entry instead, so
the next pagefault will find a shadowed page via is_largepage_backed and
fallback to 4k translations.

Simplifies out of sync shadow.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/x86/kvm/mmu.c diff | blob | blame | history
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