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KVM: x86 emulator: fix unlocked CMPXCHG8B emulation
author
Gleb Natapov
<gleb@redhat.com>
Sun, 21 Mar 2010 14:58:36 +0000
(16:58 +0200)
committer
Avi Kivity
<avi@redhat.com>
Mon, 17 May 2010 09:16:38 +0000
(12:16 +0300)
When CMPXCHG8B is executed without LOCK prefix it is racy. Preserve this
behaviour in emulator too.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/x86/kvm/emulate.c
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diff --git
a/arch/x86/kvm/emulate.c
b/arch/x86/kvm/emulate.c
index
b8ce538
..
64c9854
100644
(file)
--- a/
arch/x86/kvm/emulate.c
+++ b/
arch/x86/kvm/emulate.c
@@
-1724,7
+1724,6
@@
static inline int emulate_grp9(struct x86_emulate_ctxt *ctxt,
(u32) c->regs[VCPU_REGS_RBX];
ctxt->eflags |= EFLG_ZF;
- c->lock_prefix = 1;
}
return X86EMUL_CONTINUE;
}