KVM: x86 emulator: Add new mode of instruction emulation: skip
In the new mode instruction is decoded, but not executed. The EIP
is moved to point after the instruction.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b5ac1b7..8beccaa 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2413,6 +2413,11 @@
}
}
+ if (emulation_type & EMULTYPE_SKIP) {
+ kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip);
+ return EMULATE_DONE;
+ }
+
r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
if (vcpu->arch.pio.string)