MSR_STAR
wrmsr(MSR_STAR, msr);
svm_msr_rw_ok(svm_sc->msr_bitmap, MSR_STAR);
wrmsr(MSR_STAR, host_msrs[IDX_MSR_STAR]);
host_msrs[IDX_MSR_STAR] = rdmsr(MSR_STAR);
host_msrs[IDX_MSR_STAR] = rdmsr(MSR_STAR);
guest_msr_rw(vmx, MSR_STAR);
wrmsr(MSR_STAR, vcpu->guest_msrs[IDX_MSR_STAR]);
vcpu->guest_msrs[IDX_MSR_STAR] = rdmsr(MSR_STAR);
wrmsr(MSR_STAR, host_msrs[IDX_MSR_STAR]);
case MSR_STAR: