On 03/09/2010 04:09 PM, Gleb Natapov wrote:
Eliminate the need to call back into KVM to get it from emulator.


@@ -3499,6 +3499,7 @@ int emulate_instruction(struct kvm_vcpu *vcpu,

                vcpu->arch.emulate_ctxt.vcpu = vcpu;
                vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
+               vcpu->arch.emulate_ctxt.cpl = kvm_x86_ops->get_cpl(vcpu);
                vcpu->arch.emulate_ctxt.mode =
                        (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
                        (vcpu->arch.emulate_ctxt.eflags&  X86_EFLAGS_VM)

This is an unconditional VMREAD, which is slow (extra slow if nested). Most common emulator ops do not need the cpl.

--
error compiling committee.c: too many arguments to function

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