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KVM: MMU: Introduce drop_spte()
authorAvi Kivity <avi@redhat.com>
Sun, 6 Jun 2010 11:31:27 +0000 (14:31 +0300)
committerAvi Kivity <avi@redhat.com>
Mon, 2 Aug 2010 03:40:17 +0000 (06:40 +0300)
commitbe38d276b0189fa86231fc311428622a1981ad62
tree4706819e23ade99c43bb676830071da9bd2d0abdtree | snapshot (tar.gz zip)
parentdd180b3e90253cb4ca95d603a8c17413f8daec69commit | diff
KVM: MMU: Introduce drop_spte()

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>
arch/x86/kvm/mmu.c diff | blob | blame | history
arch/x86/kvm/paging_tmpl.h diff | blob | blame | history