diff options
| -rw-r--r-- | arch/x86/kvm/emulate.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index a16bf225cab0..4cb0da660283 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2052,8 +2052,10 @@ static int em_ret_far_imm(struct x86_emulate_ctxt *ctxt) static int em_cmpxchg(struct x86_emulate_ctxt *ctxt) { /* Save real source value, then compare EAX against destination. */ + ctxt->dst.orig_val = ctxt->dst.val; + ctxt->dst.val = reg_read(ctxt, VCPU_REGS_RAX); ctxt->src.orig_val = ctxt->src.val; - ctxt->src.val = reg_read(ctxt, VCPU_REGS_RAX); + ctxt->src.val = ctxt->dst.orig_val; fastop(ctxt, em_cmp); if (ctxt->eflags & EFLG_ZF) { @@ -2063,6 +2065,7 @@ static int em_cmpxchg(struct x86_emulate_ctxt *ctxt) /* Failure: write the value we saw to EAX. */ ctxt->dst.type = OP_REG; ctxt->dst.addr.reg = reg_rmw(ctxt, VCPU_REGS_RAX); + ctxt->dst.val = ctxt->dst.orig_val; } return X86EMUL_CONTINUE; } |