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Commit 2fcf5c8a authored by Nadav Amit's avatar Nadav Amit Committed by Paolo Bonzini
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KVM: x86: Dirty the dest op page on cmpxchg emulation 


Intel SDM says for CMPXCHG: "To simplify the interface to the processor’s bus,
the destination operand receives a write cycle without regard to the result of
the comparison.". This means the destination page should be dirtied.

Fix it to by writing back the original value if cmpxchg failed.

Signed-off-by: default avatarNadav Amit <namit@cs.technion.ac.il>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 8fff5e37
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