KVM: MMU: Introduce drop_spte()

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When we call rmap_remove(), we (almost) always immediately follow it by
an __set_spte() to a nonpresent pte.  Since we need to perform the two
operations atomically, to avoid losing the dirty and accessed bits, introduce
a helper drop_spte() and convert all call sites.

The operation is still nonatomic at this point.

Signed-off-by: Avi Kivity <avi@redhat.com>

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Avi Kivity 2010-06-06 14:31:27 +03:00

parent dd180b3e90

commit be38d276b0

2 changed files with 23 additions and 20 deletions

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30

arch/x86/kvm/mmu.c

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13

arch/x86/kvm/paging_tmpl.h

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