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(parent: e36d96f) | patch
KVM: Prevent internal slots from being COWed
authorAvi Kivity <avi@redhat.com>
Mon, 21 Jun 2010 07:57:45 +0000 (10:57 +0300)
committerAvi Kivity <avi@redhat.com>
Sun, 1 Aug 2010 07:47:08 +0000 (10:47 +0300)
commit7ac77099ce88a0c31b75acd0ec5ef3da4415a6d8
tree20fcf29491d762cb0d378c6bbda0aadb81748418tree | snapshot (tar.gz zip)
parente36d96f7cfaa71870c407131eb4fbd38ea285c01commit | diff
KVM: Prevent internal slots from being COWed

If a process with a memory slot is COWed, the page will change its address
(despite having an elevated reference count).  This breaks internal memory
slots which have their physical addresses loaded into vmcs registers (see
the APIC access memory slot).

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