MSR_STAR
wrmsr(MSR_STAR, svm_global_hstate.star);
svm_vcpu_msr_allow(cpudata->msrbm, MSR_STAR, true, true);
svm_global_hstate.star = rdmsr(MSR_STAR);
wrmsr(MSR_STAR, vmx_global_hstate.star);
vmx_vcpu_msr_allow(cpudata->msrbm, MSR_STAR, true, true);
gmsr[VMX_MSRLIST_STAR].msr = MSR_STAR;
vmx_global_hstate.star = rdmsr(MSR_STAR);
wrmsr(MSR_STAR, msr);
wrmsr(MSR_STAR, msr);