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